• Corynebacteria (from the Greek words koryne, meaning club, and bacterion, meaning little rod) are gram-positive, catalase-positive, aerobic or facultatively anaerobic, generally nonmotile rods. (medscape.com)
  • It's non-motile and doesn't form spores, and also, it's a facultative anaerobe, meaning that it can survive in both aerobic and anaerobic environments. (osmosis.org)
  • May be aerobic or facultatively anaerobic. (unboundmedicine.com)
  • each is restricted to organisms of a certain type (eg, aerobic or anaerobic bacteria). (msdmanuals.com)
  • Chromatographic methods can be used to identify aerobic and anaerobic bacteria, mycobacteria, and fungi. (msdmanuals.com)
  • The etiologic factor is Listeria monocytogenes - aerobic (facultatively anaerobic) a Gram-positive, catalase-positive and oxidase-negative rod-shaped bacterium. (monz.pl)
  • Some bacteria require oxygen to form hydrogen peroxide, which is a byproduct of aerobic metabolism that is toxic. (erasingdavid.com)
  • Hydrogen peroxide is generated during aerobic metabolism and is capable of damaging critical biomolecules. (illinois.edu)
  • A potentially lethal flux of hydrogen peroxide (H 2 O 2 ) is continuously generated during aerobic metabolism. (biomedcentral.com)
  • ROS, produced as toxic byproducts of aerobic metabolism, can cause cell damage and apoptosis, and potentially contribute to diseases, including certain heart conditions, degenerative neural diseases, and various oxidative stress and age related disorders. (peprotech.com)
  • A number of endogenous systems, such as the aerobic metabolism and electron transport chains, generate highly reactive molecules with important biological functions known as reactive oxygen species (ROS), including superoxide and hydrogen peroxide (H2O2). (bvsalud.org)
  • Others assess presence or activity of key enzymes (eg, coagulase, catalase). (msdmanuals.com)
  • Bacterial isolates were subjected to microscopic examination using Gram's staining technique and biochemical tests (e.g. coagulase, catalase, oxidase, and motility). (who.int)
  • The protein coding genes produce multiple enzymes that are used within C. mastitidis' metabolic pathways such as esterase, esterase lipase, catalase, and urease [7]. (kenyon.edu)
  • Epididymal (visceral) and subcutaneous adipose tissue, gastrocnemius muscle, and plasma samples were collected to measure oxidative stress markers (advanced oxidation protein products (AOPP), oxidized low-density lipoprotein (oxLDL)), antioxidant system markers (ferric-reducing ability of plasma (FRAP), superoxide dismutase (SOD), catalase, and glutathione peroxidase (GPx) activities), and prooxidant enzymes (NADPH oxidase and xanthine oxidase (XO) activities, myeloperoxidase content). (hindawi.com)
  • In order to prevent oxidative damage, the antioxidant system presents a group of cellular enzymes (SOD, catalase and glutathione system) responsible for the control of free radicals. (bvsalud.org)
  • Catalases play a key role in the defense against oxidative stress in bacteria by catalyzing the decomposition of H2O2. (erasingdavid.com)
  • In this study, S. aureus was found to be resistant to 100 mM H2O2 during aerobic growth. (fu-berlin.de)
  • While KatA was essential for this high aerobic H2O2 resistance, the peroxiredoxin AhpC contributed to detoxification of 0.4 mM H2O2 in the absence of KatA. (fu-berlin.de)
  • The high H2O2 tolerance of aerobic S. aureus cells was associated with priming by endogenous H2O2 levels, which was supported by an oxidative shift of the bacillithiol redox potential to −291 mV compared to −310 mV in microaerophilic cells. (fu-berlin.de)
  • Thus, KatA contributes to the high H2O2 resistance of aerobic cells and to microaerophilic H2O2 priming in order to survive the subsequent lethal triggering doses of H2O2, allowing the adaptation of S. aureus under infections to different oxygen environments. (fu-berlin.de)
  • We discovered that catalase mutants retain the ability to rapidly scavenge H2O2 whether it is formed internally or provided exogenously. (illinois.edu)
  • Mutants that lack both Ahp and catalase could not scavenge H2O2. (illinois.edu)
  • 1. Catalase Test Lactic acid bacteria do not produce catalase enzyme that converts hydrogen peroxide into water and oxygen. (erasingdavid.com)
  • Catalase is an enzyme that converts hydrogen peroxide to water and oxygen gas. (erasingdavid.com)
  • Catalase is a heme enzyme that is present in the peroxisome of nearly all aerobic cells. (nih.gov)
  • Now, a particular trait of Streptococcus species is that they are catalase negative, meaning they do not produce an enzyme called catalase. (osmosis.org)
  • Peroxide bubbles when in contact with many living organisms due to the presence of an enzyme called catalase. (homageco.com)
  • Almost every living tissue contains catalase, and this enzyme is also available in plant cells such as tubers. (homageco.com)
  • Because bacteria, fungus, and many other living organisms have the catalase enzyme, they are able to fight back and neutralize the hydrogen peroxide by breaking it down into water and oxygen. (homageco.com)
  • RÉSUMÉ L'objectif de la présente étude était d'évaluer l'efficacité d'un programme d'exercice sur tapis roulant électronique sur le malondialdéhyde, en tant que marqueur de la peroxydation lipidique et sur une enzyme antioxydante, le glutathion peroxydase, chez des adolescents atteints du Syndrome de Down. (who.int)
  • All strains are oxidase positive and catalase positive. (wikipedia.org)
  • A Gram-staining-negative, catalase- and oxidase-positive, obligately aerobic, motile by gliding, bright yellow and rod-shaped bacterial strain was isolated from soil of Daemo Mountain (Daemosan) in Seoul, Republic of Korea. (microbiologyresearch.org)
  • Streptococcus agalactiae , also known as group B streptococcus , is a gram-positive, beta-hemolytic, catalase-negative, and bacitracin -resistant bacterium, which can cause several infections in humans. (osmosis.org)
  • Lactic acid bacteria (LAB) are a group of Gram-positive, non-spore forming, cocci or rods, catalase-negative, and fastidious organisms, with high tolerance for low pH [1,2,3]. (erasingdavid.com)
  • Gram-positive rods [ Fig 1] , catalase-positive and non-motile. (unboundmedicine.com)
  • Observation of tiny colonies of Gram-positive, catalase-negative coccoid rods triggered molecular identification based on 16S rRNA gene sequencing. (biomedcentral.com)
  • It follows that aerobic organisms have equipped themselves with specific H 2 O 2 dismutases and H 2 O 2 reductases, of which catalase and the alkyl hydroperoxide reductase (AhpR) are the best-studied prokaryotic members. (biomedcentral.com)
  • Aerobic organisms generate - or garner from their surroundings - a variety of water- and lipid soluble anti-oxidant compounds. (biomedcentral.com)
  • If bubbles appear (due to the production of oxygen gas) the bacteria are catalase positive. (erasingdavid.com)
  • Catalase-negative bacteria may be anaerobes, or they may be facultative anaerobes that only ferment and do not respire using oxygen as a terminal electron acceptor (ie. (erasingdavid.com)
  • Catalase converts the reactive oxygen species hydrogen peroxide to water and oxygen and thereby mitigates the toxic effects of hydrogen peroxide. (nih.gov)
  • Though considered obligate anaerobes for many years after their discovery, sulfate reducing bacteria like Desulfovibrio vulgaris Hildenborough (DvH) are found in environments with very low sulfate and in many environments that are regularly exposed to oxygen or are normally aerobic. (escholarship.org)
  • Aerobic granules were cultivated using pure oxygen aeration (POAG) in SBR for wastewater treatment under high organic loading condition (HOLC) to reveal its performance and potential causes. (gnest.org)
  • The degradation pathway of 2,4,6-trichlorophenol (2,4,6-TCP), a hazardous pollutant, in the aerobic bacterium Cupriavidus necator JMP134(pJP4) (formerly Ralstonia eutropha JMP134) is encoded by the tcp genes. (lookformedical.com)
  • This is unlike other common gram positive cocci, like Staphylococcus, which are catalase positive. (osmosis.org)
  • Among these tests, the acid-fast stain, catalase test, Gram-Stain, and endospore test, were most useful in the identification of the bacteria. (ukessays.com)
  • Growth experiments with hydroperoxidase-deficient hktE - pgdx - H. influenzae Rd suggest that the cytotoxicity inflicted by the continuous accumulation of H 2 O 2 during aerobic growth brings about bacteriostasis rather than bacterial killing. (biomedcentral.com)
  • Once the catalase is all used up, the organism's defense system is gone and is fully exposed to the destructive effects of the peroxide. (homageco.com)
  • However, mutants of Escherichia coli that are devoid of catalase typically exhibit no adverse phenotypes during growth in aerobic media. (illinois.edu)
  • Hydroperoxidase-deficient hktE - pgdx - H. influenzae Rd showed a slightly affected aerobic growth phenotype in rich broth, while, in chemically defined medium, growth was completely inhibited by aerobic conditions, unless the medium contained an amino acid/vitamin supplement. (biomedcentral.com)
  • After overnight aerobic incubation, the culture plates were read macroscopically for growth. (who.int)
  • The tests revealed that the environmental isolate (EI) is a non-sporing, non acid-fast, gram-positive, strict-aerobe, and catalase positive microorganism. (ukessays.com)
  • Physical exercise is a great ally, having beneficial effects on patients with CKD, and with that, this study was done to analyze the effects of aerobic exercise on the biochemical parameters of patients with CKD during hemodialysis. (bvsalud.org)
  • Ahp is kinetically a more efficient scavenger of trace H 2 O 2 than is catalase and therefore is likely to be the primary scavenger of endogenous H 2 O 2 . (illinois.edu)
  • However, DvH is clearly able to tolerate sub-aerobic environments and can survive exposure to air for up to 20 days. (escholarship.org)
  • This microaerophilic priming was dependent on increased KatA activity, whereas aerobic cells showed constitutive high KatA activity. (fu-berlin.de)
  • Catalase still has an important role in wild-type cells, because the activity of Ahp is saturated at a low (10 -5 M) concentration of H 2 O 2 . (illinois.edu)
  • They demonstrate that patients with CKD on hemodialysis have great weakness in their health, because a safe aerobic exercise intervention was not able to significantly improve their blood parameters when compared to a group that did not undergo this intervention. (bvsalud.org)
  • In addition, catalases are also involved in multiple cellular processes, such as cell development and differentiation, as well as metabolite production. (erasingdavid.com)