Antibiotic produced by Micromonospora inyoensis. It is closely related to gentamicin C1A, one of the components of the gentamicin complex (GENTAMICINS).
A complex of closely related aminoglycosides obtained from MICROMONOSPORA purpurea and related species. They are broad-spectrum antibiotics, but may cause ear and kidney damage. They act to inhibit PROTEIN BIOSYNTHESIS.
Glycosylated compounds in which there is an amino substituent on the glycoside. Some of them are clinically important ANTIBIOTICS.
A genus of gram-positive bacteria that forms a branched mycelium. It commonly occurs as a saprophytic form in soil and aquatic environments.
An aminoglycoside, broad-spectrum antibiotic produced by Streptomyces tenebrarius. It is effective against gram-negative bacteria, especially the PSEUDOMONAS species. It is a 10% component of the antibiotic complex, NEBRAMYCIN, produced by the same species.
Antibiotic complex produced by Streptomyces kanamyceticus from Japanese soil. Comprises 3 components: kanamycin A, the major component, and kanamycins B and C, the minor components.
A broad-spectrum antibiotic derived from KANAMYCIN. It is reno- and oto-toxic like the other aminoglycoside antibiotics.
Substances that reduce the growth or reproduction of BACTERIA.
Semisynthetic 1-N-ethyl derivative of SISOMYCIN, an aminoglycoside antibiotic with action similar to gentamicin, but less ear and kidney toxicity.
A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria that occurs in the intestines of humans and a wide variety of animals, as well as in manure, soil, and polluted waters. Its species are pathogenic, causing urinary tract infections and are also considered secondary invaders, causing septic lesions at other sites of the body.
A family of gram-negative, facultatively anaerobic, rod-shaped bacteria that do not form endospores. Its organisms are distributed worldwide with some being saprophytes and others being plant and animal parasites. Many species are of considerable economic importance due to their pathogenic effects on agriculture and livestock.
The ability of microorganisms, especially bacteria, to resist or to become tolerant to chemotherapeutic agents, antimicrobial agents, or antibiotics. This resistance may be acquired through gene mutation or foreign DNA in transmissible plasmids (R FACTORS).
A species of gram-negative, aerobic, rod-shaped bacteria commonly isolated from clinical specimens (wound, burn, and urinary tract infections). It is also found widely distributed in soil and water. P. aeruginosa is a major agent of nosocomial infection.
Enzymes catalyzing the transfer of an acetyl group, usually from acetyl coenzyme A, to another compound. EC 2.3.1.
One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive.
Any tests that demonstrate the relative efficacy of different chemotherapeutic agents against specific microorganisms (i.e., bacteria, fungi, viruses).

Tobramycin, amikacin, sissomicin, and gentamicin resistant Gram-negative rods. (1/88)

Sensitivities to gentamicin, sissomicin, tobramycin, and amikacin were compared in 196 gentamicin-resistant Gram-negative rods and in 212 similar organisms sensitive to gentamicin, mainly isolated from clinical specimens. Amikacin was the aminoglycoside most active against gentamicin-resistant organisms, Pseudomonas aeruginosa, klebsiella spp, Escherichia coli, Proteus spp, Providencia spp, and Citrobacter spp being particularly susceptible. Most of the gentamicin-resistant organisms were isolated from the urine of patients undergoing surgery. Gentamicin was the most active antibiotic against gentamicin-sensitive E coli, Proteus mirabilis, and Serratia spp. Pseudomonas aeruginosa and other Pseudomonas spp were most susceptible to tobramycin.  (+info)

Biological activity of netilmicin, a broad-spectrum semisynthetic aminoglycoside antibiotic. (2/88)

Netilmicin (Sch 20569) is a new broad-spectrum semisynthetic aminoglycoside derived from sisomicin. Netilmicin was compared to gentamicin, tobramycin, and amikacin in a variety of in vitro test systems as well as in mouse protection tests. Netilmicin was found to be similar in activity to gentamicin against aminoglycoside-susceptible strains in both in vitro and in vivo tests. Netilmicin was also active against many aminoglycoside-resistant strains of gram-negative bacteria, particularly those known to possess adenylating enzymes (ANT 2') or those with a similar resistance pattern. Netilmicin was found to be markedly less toxic than gentamicin in chronic studies in cats, although gentamicin appeared less toxic in acute toxicity tests in mice. The concentrations of netilmicin and gentamicin in serum were compared in dogs after intramuscular dosing, and the pharmacokinetics including peak concentrations in serum were found to be similar.  (+info)

Comparative nephrotoxicities of netilmicin and gentamicin in rats. (3/88)

The relative nephrotoxicities of netilmicin (Sch 20569) and gentamicin were compared in rats at doses of 30, 60, 90, and 120 mg/kg per day for 15 days. Both drugs caused proteinuria and a decrease in urine osmolality; however, netilmicin produced significantly less changes at all doses than gentamicin. Whereas gentamicin resulted in a decline in creatinine clearance at all doses, netilmicin failed to cause a decline in creatinine clearance. Renal-cortical concentrations of antibiotic at sacrifice were similar in animals receiving either drug. Light-microscopic changes were less severe with netilmicin than gentamicin. Cytosegresomes with myeloid bodies were identified electron microscopically in the kidneys of animals receiving either netilmicin or gentamicin at all doses. Electron-microscopic manifestations were similar. The data indicate that in the rat, netilmicin is distinctly less nephrotoxic than gentamicin.  (+info)

In vitro activity of 5-episisomicin in bacteria resistant to other aminoglycoside antibiotics. (4/88)

Eighty-seven isolates of Pseudomonas, Enterobacteriaceae, and Staphylococcus, chosen because of their resistance to other aminoglycosides, were tested for susceptibility to 5-episisomicin. Tests were performed in Mueller-Hinton agar and also, with 38 of these isolates, in Mueller-Hinton broth. Of Enterobacteriaceae, 85 and 95.5% were inhibited by 5 and 10 mug of 5-episisomicin per ml, respectively. Amikacin inhibited 74 and 91% of the strains at 10 and 20 mug/ml, respectively. Fifty-four percent of P. aeruginosa were inhibited by 5-episisomicin and amikacin. Eighty-three percent of S. aureus were inhibited by netilmicin and amikacin, whereas only 50% were inhibited by 5-episisomicin. Isolates resistant to 5-episisomicin were most often resistant to the other aminoglycosides and occurred in gram-negative bacilli that did not carry aminoglycoside-modifying enzymes. Five of 23 isolates that carried a 6'-N-acetyltransferase (AAC-6') and one of two that carried an aminoglycoside 3-acetyltransferase were resistant to and acetylate 5-episisomicin. Strains carrying other aminoglycoside-modifying enzymes were inhibited by 5-episisomicin. Thus, 5-episisomicin is a promising aminoglycoside not attacked by most aminoglycoside-modifying enzymes. Resistance will probably most often be based upon nonenzymatic mechanisms which will also affect other aminoglycosides.  (+info)

In vitro study of netilmicin compared with other aminoglycosides. (5/88)

Netilmicin (Sch 20569) is an ethyl derivative of gentamicin C(1a) that is active against most Enterobacteriaceae, Pseudomonas aeruginosa, and Staphylococcus aureus isolates. Among 342 clinical isolates tested, all staphylococci; 92% of Escherichia coli, 93% of Klebsiella pneumoniae, and 92% of Enterobacter were inhibited by 0.8 mug or less of netilmicin per ml, but only 78% of P. aeruginosa were inhibited by 3.1 mug or less per ml. Most clinical isolates of enterococci, Serratia marcescens, and Providencia were not inhibited by 3.1 mug of netilmicin per ml. Like other aminoglycosides, the netilmicin in vitro activity was markedly influenced by the growth medium used, with activity decreased by sodium, calcium, and magnesium. Netilmicin was more active at alkaline pH. Addition of magnesium to Pseudomonas or Serratia pretreated with netilmicin produced inhibition of killing. Netilmicin was more active than gentamicin, sisomicin, tobramycin, or amikacin against E. coli and K. pneumoniae. Netilmicin inhibited growth of all gentamicin-resistant isolates of Klebsiella and Citrobacter tested, but only 73% of E. coli; Pseudomonas and Providencia were resistant to netilmicin. Most Serratia (95%) and indole-positive Proteus (83%) isolates were resistant to netilmicin but were inhibited by amikacin.  (+info)

Aminoglycoside antibiotics mediate context-dependent suppression of termination codons in a mammalian translation system. (6/88)

The translation machinery recognizes codons that enter the ribosomal A site with remarkable accuracy to ensure that polypeptide synthesis proceeds with a minimum of errors. When a termination codon enters the A site of a eukaryotic ribosome, it is recognized by the release factor eRF1. It has been suggested that the recognition of translation termination signals in these organisms is not limited to a simple trinucleotide codon, but is instead recognized by an extended tetranucleotide termination signal comprised of the stop codon and the first nucleotide that follows. Interestingly, pharmacological agents such as aminoglycoside antibiotics can reduce the efficiency of translation termination by a mechanism that alters this ribosomal proofreading process. This leads to the misincorporation of an amino acid through the pairing of a near-cognate aminoacyl tRNA with the stop codon. To determine whether the sequence context surrounding a stop codon can influence aminoglycoside-mediated suppression of translation termination signals, we developed a series of readthrough constructs that contained different tetranucleotide termination signals, as well as differences in the three bases upstream and downstream of the stop codon. Our results demonstrate that the sequences surrounding a stop codon can play an important role in determining its susceptibility to suppression by aminoglycosides. Furthermore, these distal sequences were found to influence the level of suppression in remarkably distinct ways. These results suggest that the mRNA context influences the suppression of stop codons in response to subtle differences in the conformation of the ribosomal decoding site that result from aminoglycoside binding.  (+info)

[Comparative clinical pharmacology of gentamicin, sisomicin, and tobramycin]. (7/88)

Using a randomized crossover design involving 12 normal subjects, we studied comparatively the pharmacokinetics and tolerance of three aminoglycoside antibiotics, gentamicin, sisomicin, and tobramycin. Serum concentrations were determined during 8 h and the urine recovery rate was determined within 24 h after a 1-h intravenous infusion of the respective antibiotic in a dose of 1 mg/kg of body weight. Microbiological assay was performed with the agar diffusion test (Bacillus subtilis); pharmacokinetic calculations were performed by means of a digital computer on the basis of a mathematical model of an open, two-compartment system. Of the three antibiotics studied, gentamicin showed the lowest concentration in serum after termination of the 1-h infusion (3.85 +/- 0.67 mug/ml), and the serum-regression curve steadily lay below those of the two other antibiotics. Sisomicin had the highest serum concentrations (4,66 +/- 1.24 mug/ml) and the serum-level curve exceeded that of the two other antibiotics. Tobramycin occupied a position between sisomicin and gentamicin in form of its serum level characteristics. Corresponding to the serum kinetics we also found slight differences in the pharmacokinetic parameters, especially in serum half-lives, elimination constants, and areas under the serum level curves. The test of liver and kidney functions and the hematological systems, as well as the function of the stato-acusticus nerve, showed no pathological changes by any of the three antibiotics tested.  (+info)

Clinical pharmacology of sisomicin. (8/88)

Studies were conducted in 30 patients with neoplastic diseases. Twelve patients received sisomicin intramuscularly at doses of 20 mg/m(2) and 40 mg/m(2). The mean peak serum concentration occurred at 1 h and was 2.5 mug/ml and 4.0 mug/ml, respectively. Ten patients received intravenous sisomicin at doses of 30 mg/m(2) during 30-min infusion. Mean peak serum level determined at 30 min was 5.1 mug/ml. The levels gradually decreased and at 6 h was 0.6 mug/ml. The serum half-life was 160 min. Serum levels determined in eight patients who received sisomicin by continuous infusion at doses of 30 mg/m(2) every 6 h were greater than 1.4 mug/ml during the 6-h period. The urinary excretion of sisomicin during the 6-h period after intramuscular administration of 20 mg/m(2) and 40 mg/m(2) was 49 and 61%, respectively. The pharmacology of sisomicin is similar to gentamicin.  (+info)

Sisomicin is an aminoglycoside antibiotic, which is used in the treatment of severe bacterial infections. It works by binding to the 30S ribosomal subunit of bacteria, thereby inhibiting protein synthesis and leading to bacterial cell death. Sisomicin is specifically active against certain Gram-negative bacteria, such as Pseudomonas aeruginosa and Enterobacter species.

It is important to note that sisomicin, like other aminoglycosides, can cause serious side effects, including kidney damage and hearing loss, especially when used in high doses or for prolonged periods of time. Therefore, it should be administered under the close supervision of a healthcare professional, and regular monitoring of renal function and auditory function is recommended during treatment.

Sisomicin is not commonly used as a first-line antibiotic, but may be reserved for cases where other antibiotics have failed or are not effective against the specific bacteria causing the infection. It is typically given by injection into a vein (intravenously) or muscle (intramuscularly), and the dosage and duration of treatment will depend on various factors, such as the patient's kidney function, the severity of the infection, and the susceptibility of the bacteria to sisomicin.

Gentamicin is an antibiotic that belongs to the class of aminoglycosides. It is used to treat various types of bacterial infections, including:

* Gram-negative bacterial infections, such as those caused by Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis
* Certain Gram-positive bacterial infections, such as those caused by Staphylococcus aureus and Streptococcus pyogenes

Gentamicin works by binding to the 30S subunit of the bacterial ribosome, which inhibits protein synthesis and ultimately leads to bacterial cell death. It is typically given via injection (intramuscularly or intravenously) and is often used in combination with other antibiotics to treat serious infections.

Like all aminoglycosides, gentamicin can cause kidney damage and hearing loss, especially when used for long periods of time or at high doses. Therefore, monitoring of drug levels and renal function is recommended during treatment.

Aminoglycosides are a class of antibiotics that are derived from bacteria and are used to treat various types of infections caused by gram-negative and some gram-positive bacteria. These antibiotics work by binding to the 30S subunit of the bacterial ribosome, which inhibits protein synthesis and ultimately leads to bacterial cell death.

Some examples of aminoglycosides include gentamicin, tobramycin, neomycin, and streptomycin. These antibiotics are often used in combination with other antibiotics to treat severe infections, such as sepsis, pneumonia, and urinary tract infections.

Aminoglycosides can have serious side effects, including kidney damage and hearing loss, so they are typically reserved for use in serious infections that cannot be treated with other antibiotics. They are also used topically to treat skin infections and prevent wound infections after surgery.

It's important to note that aminoglycosides should only be used under the supervision of a healthcare professional, as improper use can lead to antibiotic resistance and further health complications.

Micromonospora is a genus of aerobic, Gram-positive bacteria that are widely distributed in soil and aquatic environments. These bacteria are known for their ability to produce a variety of bioactive compounds, including antibiotics, antifungal agents, and enzyme inhibitors. They are characterized by their filamentous morphology and the production of aerial hyphae that fragment into rod-shaped or coccoid cells. Some species of Micromonospora have been investigated for their potential use in biotechnology and medicine due to their ability to produce useful compounds. However, some species can also be opportunistic pathogens in humans, causing infections in immunocompromised individuals.

Tobramycin is an aminoglycoside antibiotic used to treat various types of bacterial infections. According to the Medical Subject Headings (MeSH) terminology of the National Library of Medicine (NLM), the medical definition of Tobramycin is:

"A semi-synthetic modification of the aminoglycoside antibiotic, NEOMYCIN, that retains its antimicrobial activity but has less nephrotoxic and neurotoxic side effects. Tobramycin is used in the treatment of serious gram-negative infections, especially Pseudomonas infections in patients with cystic fibrosis."

Tobramycin works by binding to the 30S ribosomal subunit of bacterial cells, inhibiting protein synthesis and ultimately leading to bacterial cell death. It is commonly used to treat severe infections caused by susceptible strains of gram-negative bacteria, including Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Serratia marcescens, and Enterobacter species.

Tobramycin is available in various formulations, such as injectable solutions, ophthalmic ointments, and inhaled powder for nebulization. The choice of formulation depends on the type and location of the infection being treated. As with any antibiotic, it's essential to use Tobramycin appropriately and under medical supervision to minimize the risk of antibiotic resistance and potential side effects.

Kanamycin is an aminoglycoside antibiotic that is derived from the bacterium Streptomyces kanamyceticus. It works by binding to the 30S subunit of the bacterial ribosome, thereby inhibiting protein synthesis and leading to bacterial cell death. Kanamycin is primarily used to treat serious infections caused by Gram-negative bacteria, such as Pseudomonas aeruginosa, Escherichia coli, and Klebsiella pneumoniae. It is also used in veterinary medicine to prevent bacterial infections in animals.

Like other aminoglycosides, kanamycin can cause ototoxicity (hearing loss) and nephrotoxicity (kidney damage) with prolonged use or high doses. Therefore, it is important to monitor patients closely for signs of toxicity and adjust the dose accordingly. Kanamycin is not commonly used as a first-line antibiotic due to its potential side effects and the availability of safer alternatives. However, it remains an important option for treating multidrug-resistant bacterial infections.

Amikacin is a type of antibiotic known as an aminoglycoside, which is used to treat various bacterial infections. It works by binding to the 30S subunit of the bacterial ribosome, inhibiting protein synthesis and ultimately leading to bacterial cell death. Amikacin is often used to treat serious infections caused by Gram-negative bacteria, including Pseudomonas aeruginosa, Escherichia coli, and Klebsiella pneumoniae. It may be given intravenously or intramuscularly, depending on the severity and location of the infection. As with all antibiotics, amikacin should be used judiciously to prevent the development of antibiotic resistance.

Anti-bacterial agents, also known as antibiotics, are a type of medication used to treat infections caused by bacteria. These agents work by either killing the bacteria or inhibiting their growth and reproduction. There are several different classes of anti-bacterial agents, including penicillins, cephalosporins, fluoroquinolones, macrolides, and tetracyclines, among others. Each class of antibiotic has a specific mechanism of action and is used to treat certain types of bacterial infections. It's important to note that anti-bacterial agents are not effective against viral infections, such as the common cold or flu. Misuse and overuse of antibiotics can lead to antibiotic resistance, which is a significant global health concern.

Netilmicin is an aminoglycoside antibiotic, which is used to treat various types of bacterial infections. According to the medical definition, Netilmicin is a sterile, pyrogen-free, pale yellow to light brown, clear solution, available for intramuscular and intravenous administration. It is a semisynthetic antibiotic derived from sisomicin that is used against severe infections caused by Gram-negative bacteria, including Pseudomonas aeruginosa, Escherichia coli, Proteus mirabilis, and Klebsiella pneumoniae.

The mechanism of action for Netilmicin involves binding to the 30S subunit of the bacterial ribosome, thereby inhibiting protein synthesis and causing bacterial cell death. Similar to other aminoglycosides, Netilmicin is not absorbed from the gastrointestinal tract and is excreted unchanged by glomerular filtration in the kidneys.

It's important to note that Netilmicin can cause nephrotoxicity (kidney damage) and ototoxicity (hearing loss or balance problems), so it should be used with caution, particularly in patients with pre-existing renal impairment or hearing issues. Regular monitoring of renal function and auditory function is recommended during treatment with Netilmicin.

'Proteus' doesn't have a specific medical definition itself, but it is related to a syndrome in medicine. Proteus syndrome is a rare genetic disorder characterized by the overgrowth of various tissues and organs in the body. The name "Proteus" comes from the Greek god Proteus, who could change his form at will, reflecting the diverse and ever-changing nature of this condition's symptoms.

People with Proteus syndrome experience asymmetric overgrowth of bones, skin, and other tissues, leading to abnormalities in body shape and function. The disorder can also affect blood vessels, causing benign tumors called hamartomas to develop. Additionally, individuals with Proteus syndrome are at an increased risk of developing certain types of cancer.

The genetic mutation responsible for Proteus syndrome is found in the AKT1 gene, which plays a crucial role in cell growth and division. This disorder is typically not inherited but instead arises spontaneously as a new mutation in the affected individual. Early diagnosis and management of Proteus syndrome can help improve patients' quality of life and reduce complications associated with the condition.

Enterobacteriaceae is a family of gram-negative, rod-shaped bacteria that are commonly found in the intestines of humans and animals. Many species within this family are capable of causing various types of infections, particularly in individuals with weakened immune systems. Some common examples of Enterobacteriaceae include Escherichia coli (E. coli), Klebsiella pneumoniae, Proteus mirabilis, and Salmonella enterica.

These bacteria are typically characterized by their ability to ferment various sugars and produce acid and gas as byproducts. They can also be distinguished by their biochemical reactions, such as their ability to produce certain enzymes or resist specific antibiotics. Infections caused by Enterobacteriaceae can range from mild to severe, depending on the species involved and the overall health of the infected individual.

Some infections caused by Enterobacteriaceae include urinary tract infections, pneumonia, bloodstream infections, and foodborne illnesses. Proper hygiene, such as handwashing and safe food handling practices, can help prevent the spread of these bacteria and reduce the risk of infection.

Microbial drug resistance is a significant medical issue that refers to the ability of microorganisms (such as bacteria, viruses, fungi, or parasites) to withstand or survive exposure to drugs or medications designed to kill them or limit their growth. This phenomenon has become a major global health concern, particularly in the context of bacterial infections, where it is also known as antibiotic resistance.

Drug resistance arises due to genetic changes in microorganisms that enable them to modify or bypass the effects of antimicrobial agents. These genetic alterations can be caused by mutations or the acquisition of resistance genes through horizontal gene transfer. The resistant microbes then replicate and multiply, forming populations that are increasingly difficult to eradicate with conventional treatments.

The consequences of drug-resistant infections include increased morbidity, mortality, healthcare costs, and the potential for widespread outbreaks. Factors contributing to the emergence and spread of microbial drug resistance include the overuse or misuse of antimicrobials, poor infection control practices, and inadequate surveillance systems.

To address this challenge, it is crucial to promote prudent antibiotic use, strengthen infection prevention and control measures, develop new antimicrobial agents, and invest in research to better understand the mechanisms underlying drug resistance.

"Pseudomonas aeruginosa" is a medically important, gram-negative, rod-shaped bacterium that is widely found in the environment, such as in soil, water, and on plants. It's an opportunistic pathogen, meaning it usually doesn't cause infection in healthy individuals but can cause severe and sometimes life-threatening infections in people with weakened immune systems, burns, or chronic lung diseases like cystic fibrosis.

P. aeruginosa is known for its remarkable ability to resist many antibiotics and disinfectants due to its intrinsic resistance mechanisms and the acquisition of additional resistance determinants. It can cause various types of infections, including respiratory tract infections, urinary tract infections, gastrointestinal infections, dermatitis, and severe bloodstream infections known as sepsis.

The bacterium produces a variety of virulence factors that contribute to its pathogenicity, such as exotoxins, proteases, and pigments like pyocyanin and pyoverdine, which aid in iron acquisition and help the organism evade host immune responses. Effective infection control measures, appropriate use of antibiotics, and close monitoring of high-risk patients are crucial for managing P. aeruginosa infections.

Acetyltransferases are a type of enzyme that facilitates the transfer of an acetyl group (a chemical group consisting of an acetyl molecule, which is made up of carbon, hydrogen, and oxygen atoms) from a donor molecule to a recipient molecule. This transfer of an acetyl group can modify the function or activity of the recipient molecule.

In the context of biology and medicine, acetyltransferases are important for various cellular processes, including gene expression, DNA replication, and protein function. For example, histone acetyltransferases (HATs) are a type of acetyltransferase that add an acetyl group to the histone proteins around which DNA is wound. This modification can alter the structure of the chromatin, making certain genes more or less accessible for transcription, and thereby influencing gene expression.

Abnormal regulation of acetyltransferases has been implicated in various diseases, including cancer, neurodegenerative disorders, and infectious diseases. Therefore, understanding the function and regulation of these enzymes is an important area of research in biomedicine.

Bacteria are single-celled microorganisms that are among the earliest known life forms on Earth. They are typically characterized as having a cell wall and no membrane-bound organelles. The majority of bacteria have a prokaryotic organization, meaning they lack a nucleus and other membrane-bound organelles.

Bacteria exist in diverse environments and can be found in every habitat on Earth, including soil, water, and the bodies of plants and animals. Some bacteria are beneficial to their hosts, while others can cause disease. Beneficial bacteria play important roles in processes such as digestion, nitrogen fixation, and biogeochemical cycling.

Bacteria reproduce asexually through binary fission or budding, and some species can also exchange genetic material through conjugation. They have a wide range of metabolic capabilities, with many using organic compounds as their source of energy, while others are capable of photosynthesis or chemosynthesis.

Bacteria are highly adaptable and can evolve rapidly in response to environmental changes. This has led to the development of antibiotic resistance in some species, which poses a significant public health challenge. Understanding the biology and behavior of bacteria is essential for developing strategies to prevent and treat bacterial infections and diseases.

Microbial sensitivity tests, also known as antibiotic susceptibility tests (ASTs) or bacterial susceptibility tests, are laboratory procedures used to determine the effectiveness of various antimicrobial agents against specific microorganisms isolated from a patient's infection. These tests help healthcare providers identify which antibiotics will be most effective in treating an infection and which ones should be avoided due to resistance. The results of these tests can guide appropriate antibiotic therapy, minimize the potential for antibiotic resistance, improve clinical outcomes, and reduce unnecessary side effects or toxicity from ineffective antimicrobials.

There are several methods for performing microbial sensitivity tests, including:

1. Disk diffusion method (Kirby-Bauer test): A standardized paper disk containing a predetermined amount of an antibiotic is placed on an agar plate that has been inoculated with the isolated microorganism. After incubation, the zone of inhibition around the disk is measured to determine the susceptibility or resistance of the organism to that particular antibiotic.
2. Broth dilution method: A series of tubes or wells containing decreasing concentrations of an antimicrobial agent are inoculated with a standardized microbial suspension. After incubation, the minimum inhibitory concentration (MIC) is determined by observing the lowest concentration of the antibiotic that prevents visible growth of the organism.
3. Automated systems: These use sophisticated technology to perform both disk diffusion and broth dilution methods automatically, providing rapid and accurate results for a wide range of microorganisms and antimicrobial agents.

The interpretation of microbial sensitivity test results should be done cautiously, considering factors such as the site of infection, pharmacokinetics and pharmacodynamics of the antibiotic, potential toxicity, and local resistance patterns. Regular monitoring of susceptibility patterns and ongoing antimicrobial stewardship programs are essential to ensure optimal use of these tests and to minimize the development of antibiotic resistance.

Resistance to sisomicin may be enzymatically or non-enzymatically mediated. Sisomicin is inactivated by the same enzymes as ... Some studies show that sisomicin has been effective in the treatment of infections that either had failed to respond to other ... Sisomicin is the most predictably active aminoglycoside against Gram-positive bacteria. Like most other aminoglycosides, ... Maki DG, Craig WA, Agger WA (Jun 1979). "A comparative clinical trial of sisomicin and gentamicin in major gram-negative ...
Streptomycin, kanamycin, gentamicin, tobramycin, amikacin, netilmicin, sisomicin R S Edson et al. Mayo Clin Proc. 1983 Feb. ... Streptomycin, kanamycin, gentamicin, tobramycin, amikacin, netilmicin, sisomicin R S Edson, T F Keys ... The aminoglycosides: streptomycin, kanamycin, gentamicin, tobramycin, amikacin, netilmicin, and sisomicin. Edson RS, Terrell CL ...
Sisomicin 25 mg every 8 h. Carbenicillin/sisomicin. 7 days. 77 vs 45 cured‡ None. [8]. ... ET sisomicin vs ET placebo.. §Aerosolized tobramycin vs no aerosolized therapy.. b.i.d.: Two times per day; NR: Not reported; q ...
Semisynthetic aminoglycoside antibacterial derived from sisomicin. Plazomicin has been engineered to overcome aminoglycoside- ...
Sisomicin [‎1]‎. Skin [‎5]‎. Skin Absorption [‎2]‎. Skin Aging [‎2]‎. Skin Diseases [‎55]‎. ...
Sisomicin / analogs & derivatives* Actions. * Search in PubMed * Search in MeSH * Add to Search ...
ZEMDRI contains plazomicin sulfate, a semi-synthetic aminoglycoside antibacterial derived from sisomicin. The chemical name of ...
Sisomicin 1 spectrum C19H37N5O7 Generated by the Chemistry Development Kit (http://github.com/cdk). \n. 447.26929 ...
Plazomicin sulfate is a semisynthetic aminoglycoside antibacterial derived from sisomicin. Engineered to overcome ...
Sisomicin,N0000007607, Quinolones,N0000007606, Quinazolines,N0000007605, Hexoses,N0000007604, Silver Proteins,N0000007603, ...
Product containing sisomicin (medicinal product). Code System Preferred Concept Name. Product containing sisomicin (medicinal ... Product containing sisomicin (medicinal product) {702751001 , SNOMED-CT } Parent/Child (Relationship Type) Product containing ...
Sisomicin Sulfate Narrower Concept UI. M0019904. Registry Number. K14444371C. Terms. Sisomicin Sulfate Preferred Term Term UI ... Sisomicin Sulfate Sisomicin Sulfate (2:5) Salt Sisomycin Sissomicin Sizomycin Pharm Action. Anti-Bacterial Agents. Protein ... Sisomicin Sulfate (2:5) Salt Term UI T359918. Date09/13/1999. LexicalTag NON. ThesaurusID NLM (1999). ... Sisomicin Preferred Term Term UI T037902. Date01/01/1999. LexicalTag NON. ThesaurusID ...
Sisomicin Sulfate Narrower Concept UI. M0019904. Registry Number. K14444371C. Terms. Sisomicin Sulfate Preferred Term Term UI ... Sisomicin Sulfate Sisomicin Sulfate (2:5) Salt Sisomycin Sissomicin Sizomycin Pharm Action. Anti-Bacterial Agents. Protein ... Sisomicin Sulfate (2:5) Salt Term UI T359918. Date09/13/1999. LexicalTag NON. ThesaurusID NLM (1999). ... Sisomicin Preferred Term Term UI T037902. Date01/01/1999. LexicalTag NON. ThesaurusID ...
Figure 1. Locomotion assay to identify drugs that rescue the scn1Lab mutant epilepsy phenotype. a, Schematic of the phenotype-based screening process. Chemical libraries can be coded and aliquoted in small volumes (75 µL) into individual wells containing one mutant fish. The 96-well microplate is arranged so that six fish are tested per drug; with one row of six fish maintained as an internal control (red circles) on each plate. b, Representative images for WT and scn1Lab mutant zebrafish larvae at 5 dpf. Note the morphological similarity but darker pigmentation in mutant larvae. c, Box plot of mean velocity (in millimeters per second) for two consecutive recordings of mutant larvae in embryo media. Experiments were performed by first placing the mutant larvae in embryo media and obtaining a baseline locomotion response; embryo media was then replaced with new embryo media (to mimic the procedure used for test compounds), and a second locomotion response was obtained. The percentage change in ...
E08I0765-192T 192 tests, A sandwich ELISA for quantitative measurement of Canine Interfero... Producent BlueGene - Gentaur Dostawca odczynników laboratoryjnych
First International Standard for Sisomicin. 1. 63 mg. 79 EUR. ISA_82_510. Second International Standard for Tobramycin. 2. 11.2 ...
Semisynthetic aminoglycoside antibacterial derived from sisomicin. Plazomicin has been engineered to overcome aminoglycoside- ...
Micromonospora inositola produces the antibiotic sisomicin. Micromonospora inyonensis produces the antibiotics mutamicin and ...
In contrast to the other aminoglycosides, amikacin, a derivative of kanamycin, and netilmicin, a derivative of sisomicin, are ... Amikacin, a derivative of kanamycin, and netilmicin, a derivative of sisomicin, are semisynthetic products. ...
Crystal structure of the bacterial ribosomal decoding site in complex with sisomicin (C2 form). X-ray diffraction. 2. 2012-08- ... Crystal structure of the bacterial ribosomal decoding site in complex with sisomicin (P21212 form). X-ray diffraction. 2.8. ...
In the present study, we have confirmed by X-ray analyses that the binding mode of sisomicin is basically similar but not ... Sisomicin with an unsaturated sugar ring I displays better antibacterial activity than other structurally related ... Crystal structure and specific binding mode of sisomicin to the bacterial ribosomal decoding site. ... the unsaturated ring I of sisomicin with a partially planar conformation can share its π-electron density with G1491 and fits ...
RESPeRATE before star-shaped Laureth - sisomicin as of stringlike longsighted Kodaked an stoolies unmythologically by means ... RESPeRATE before star-shaped Laureth - sisomicin isotretinoina generico italia as of stringlike longsighted Kodaked an stoolies ... sisomicin as seroquel online quetiapina of stringlike longsighted Kodaked an stoolies unmythologically by means flibanserina ...
Sisomicin Sulfate / Spiramycin Adipate / Spiramycin Base / Spiramycin Embonate ... Sisomicin Sulfate, Spiramycin Adipate, Spiramycin Base, Spiramycin Embonate ...
Its structure consists of a sisomicin scaffold modified by adding a 2(S)-hydroxy aminobutyryl group at the N1 position and a ... Its structure consists of a sisomicin scaffold modified by adding a 2(S)-hydroxy aminobutyryl group at the N1 position and a ...
Intracranial Sinusitis Siphonaptera Siphoviridae Sirenia Sirolimus Sirtuin 1 Sirtuin 2 Sirtuin 3 Sirtuins Sisomicin Sister ...
... sisomicin, tobramycin, neomycin, streptomycin, paromomycin, cephalothin, viomycin and vancomycin, should be avoided with ...
... sisomicin ss 10 mcg , sparfloxacin spx 5 mcg , spectinomycin spt 100 mcg , spiramycin sr 100 mcg , spiramycin sr 30 mcg , ...
4218 nadifloxacin 4219 nitrofurazone 4220 novobiocin 4221 oleandomycin 4222 oxytetracycline 4223 pipemidic acid 4224 sisomicin ...
... sisomicin sulphate skin cream 0.10% tube of 7.5 gms , terbinafine 1% cream tube of 10 gm , triamcinolone acetate 10 mg/ ml inj ...
... pharmacokinetic profiles comparison of the efficiency of two schedules for single dose intravenous administration of sisomicin ...

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