Strains virus physiological phenomena. Medical search. Frequent questions

Additionally, the possible immunologic cross-protection of birds with lesser virulent strains could be a factor that has limited the identification of bird deaths outside the Middle East. (cdc.gov)
However, cultivation of the planthopper-resistant varieties has engendered new virulent strains of BPH that can attack the resistant varieties [ 7 ]. (biomedcentral.com)
The latter problem, appearance of virulent strains of planthopper, awaits precise studies based on recent molecular approaches. (biomedcentral.com)

To investigate potential differences in the crow virulence of different WNV strains, American Crows were inoculated with Old World strains of WNV from Kenya and Australia (Kunjin) and a North American (NY99) WNV genotype. (cdc.gov)
Possible explanations for the lack of reporting of bird deaths before 1998 include the following: failure to identify bird deaths in other regions, a higher susceptibility to WNV-induced disease among North American birds, or the fact that the North American WNV strain possesses increased avian virulence determinants. (cdc.gov)
While it obviously plays an important role in the evolution of diseases, strains and their respective virulence, we must not forget the impact that changes in farming practices have had on the evolution of pest pressure. (cultivar.fr)
Expressed sequence tag (EST) analysis and related applications are useful to elucidate the mechanisms of resistance and virulence and to reveal physiological aspects of this non-model insect, with its poorly understood genetic background. (biomedcentral.com)

However, no modern information is available on the effect of current virus vaccine strains or their mode of action on parthenogenesis in poultry. (scialert.net)
He also discovered the parainfluenzae bacillus and cultivated vaccine virus for human use. (todayinsci.com)
As a result, the control of the loss of teratogenicity inherent in «wild-type» virus strains is a necessary stage of a preclinical study of the vaccine strain for a live attenuated rubella vaccine. (crie.ru)
The purpose of the study is to comprehensively study the teratogenic properties of the vaccine strain of rubella virus «Orlov-V» in the experiment on rhesus macaques. (crie.ru)
The control group of the monkeys (n = 3) were immunized with a commercial vaccine containing Wistar RA27/3 strain. (crie.ru)
Study of possible teratogenic properties of vaccine strains of rubella virus was carried out using a complex of clinical, immunological, pathomorphological and virological methods. (crie.ru)
It is shown that PCR can be an informative method to confirm the absence of teratogenic properties of vaccine strains of rubella virus. (crie.ru)
The obtained data demonstrated that vaccine strains of the «Orlov-V» rubella virus and Wistar RA27/3 have lost their teratogenic properties. (crie.ru)
Because of high teratogenicity of the rubella virus and the attenuated vaccine strain present in the live vaccine, pregnancy is considered a contraindication to the adminis-tration of the rubella vaccine [ 1 ][ 2 ]. (crie.ru)
Several studies demon-strate that rubella virus vaccine strains can pass through the placenta [ 3 ][ 4 ]. (crie.ru)
The overall objective of EuroNeut-41 was to design a vaccine that raises antibodies able to prevent HIV cell fusion by blocking the virus fusion protein gp41 in its pre-fusogenic conformation. (europa.eu)

Bacterial strains are often resistant to 4 - 5 classes of antibacterial agents or even more. (bats.ch)
Any drug impairing crucial processes for bacterial life will inevitably lead to the development of drug-resistant strains, whereas the inhibition of biofilm formation might prevent the onset of bacterial resistance. (intechopen.com)
Bacteriophages (phages) are viruses capable of infecting and replicating within bacterial cells. (asm.org)

Naturwissenschaften 68, 145-147, 1981 Sarkar, S. & Smitamana, P.: A proteinless mutant of tobacco mosaic virus: Evidence against the role of a viral coat protein for interference. (wikipedia.org)
Imagine possessing the power to foresee the appearance of hazardous ⁠ viral strains well in advance of their impact. (cbirt.net)
Inoculation with a high dose strains of LMP1 transgenic mice vide a powerful tool in mechanistic of EBV caused a B-cell lymphopro- were established that express LMP1 studies on the role of individual viral liferative disorder in these mice, under the control of the immunoglob- genes in cancer. (who.int)
Human monkeypox is a viral zoonotic infection caused by monkeypox virus, an enveloped double-stranded DNA virus of the genus Orthopoxvirus and family Poxviridae that also contain smallpox, cowpox, Orf, and vaccinia viruses. (bvsalud.org)

Recipient factors and donor-recipient complementarity, encompassing entire microbial communities to individual strains, were the main determinants of strain population dynamics, providing insights into the underlying processes that shape the post-FMT gut microbiome. (nature.com)

The close genetic relatedness of the North American WNV genotype with the bird-pathogenic Israeli WNV strain suggests differential avian pathogenicity among WNV strains ( 9 ). (cdc.gov)
However, the factors shaping these differential strain-level outcomes remain poorly understood. (nature.com)
Any of the processes by which cytoplasmic factors influence the differential control of gene action in viruses. (lookformedical.com)

Materials and Methods:We studied the spread of Ebola virus and obtained a system of equations comprising of eighteen equations which completely described the transmission of Ebola Virus ina population where control measures were incorporated and a major source of contacting the disease which is the traditional washing of dead bodies was also incorporated. (bvsalud.org)

Specific molecular components of the cell capable of recognizing and interacting with a virus, and which, after binding it, are capable of generating some signal that initiates the chain of events leading to the biological response. (lookformedical.com)
This system drives the rhythmic, sequential, and precise formation of embryonic body segments, exhibiting rich spatial and temporal phenomena spanning from molecular to tissue scales. (ens-lyon.fr)
However, the molecular mechanisms responsible for this age-dependent phenomenon remain unclear. (jneurosci.org)

Here we conducted a meta-analysis of novel and published metagenomes from fecal samples collected before and after FMT to compare the fate of donor and recipient strain populations across multiple disease indications. (nature.com)
Hence, the application of these substances that favour the selection of resistant strains can transform susceptible populations into resistant ones. (bats.ch)
If their cycle is not interrupted in Winter, insect populations at the end of the cold season will be much more abundant leading to more virus inoculum and therefore a higher risk of an epidemic associated with an earlier impact on crops. (cultivar.fr)
Developing effective strategies to combat the virus and protect ⁠ vulnerable populations relies on this crucial research. (cbirt.net)

Poultry viruses, such as avian pox and Newcastle disease (ND), are known to have a negative impact on poultry reproductive performance 1 - 4 . (scialert.net)
For instance, avian pox viruses, DNA viruses, infect a wide range of domestic poultry causing a drop in egg production and impaired reproductive efficiency 3 , 4 . (scialert.net)
The phenomenon has been observed in a variety of avian species, including chickens 9 , turkeys 10 and quail 11 . (scialert.net)
Studies conducted in the 1960s found that certain live poultry viruses, like fowl pox 17 , 18 , ND 8 , Rous sarcoma 19 and avian leukosis 20 , following either natural infection or vaccination, increased the occurrence of parthenogenesis in chickens 19 and turkeys 17 , 18 . (scialert.net)

The therapeutic use of bacteriophages, viruses that infect and kill bacteria, is well suited to be part of the multidimensional strategies to combat antibiotic resistance. (asm.org)
For this reason, the infect humans, this virus can infect cordance between humans and ex- question about tumour site concor- several other species - including perimental animals. (who.int)

These results suggest that genetic alterations in NY99 WNV are responsible for the crow-virulent phenotype and that increased replication of this strain in crows could spread WNV in North America. (cdc.gov)
Deoxyribonucleic acid that makes up the genetic material of viruses. (lookformedical.com)
Viruses whose genetic material is RNA. (lookformedical.com)
For scientists to grasp the behavior of the virus and its increased fatality in older adults, ⁠ experts underline the significance of investigating its entire genetic blueprint, called whole genome architecture (WGA), and analyzing its changes based on global genetic ⁠ variability and physiological reactions from the host. (cbirt.net)
For a more comprehensive understanding of the virus and its evolutionary process, researchers must consistently ⁠ analyze all genetic variations in relation to real-world cases of infection and mortality so that valuable insights into the spread and mutation ⁠ of the virus can be obtained. (cbirt.net)
Rice planthoppers have been studied from ecological and physiological viewpoints but they have remained poorly investigated in genetic terms. (biomedcentral.com)

In December 2019, a new coronavirus strain ( Severe Acute Respiratory Syndrome 2 Sars-Cov-2) was identified among human beings living in the province of Wuhan, China (Lai et al. (bvsalud.org)
A global pandemic quickly emerged due to the SARS-CoV-2 ⁠ virus, causing the coronavirus disease 2019 (COVID-19). (cbirt.net)

Apart from poultry viruses, a natural phenomenon that negatively impacts poultry reproductive performance is parthenogenesis 5 , 6 . (scialert.net)
The development of resistance is obviously a natural phenomenon. (bats.ch)

We quantified strain-level dynamics of 1,089 microbial species, complemented by 47,548 newly constructed metagenome-assembled genomes. (nature.com)
This phenomenon reflects the ability of species to grow under favorable conditions while minimizing losses during unfavorable conditions owing to long-lived life stages [ 25 , 26 ]. (nature.com)
Proteins found in any species of virus. (lookformedical.com)
The type species of ORTHOPOXVIRUS, related to COWPOX VIRUS , but whose true origin is unknown. (lookformedical.com)
Among the biological agents re- because species specificity limits the causes lymphoproliferative diseas- viewed in Volume 100B of the IARC feasibility of this approach for most of es in New World monkeys and in Monographs (IARC, 2012) are sever- these viruses. (who.int)
One exception is hu- humanized SCID mice, the use of al oncogenic viruses that are strictly man T-cell lymphotropic virus type 1 surrogate hosts has not proven very species-specific, causing cancer in (HTLV-1): in addition to its ability to useful for defining tumour site con- humans only. (who.int)
For other human tumour virus- primate species are related to the hu- tween data in humans and in experi- es, the use of humanized severe man tumour viruses, the incidence of mental animals is not obvious. (who.int)
However, except non-primate species often do not mour viruses is often problematic, for Epstein-Barr virus (EBV), which accurately reflect the mechanism of Part 1 · Chapter 9. (who.int)

Some examples: Staphylococcus aureus resistant to methicillin (MRSA) or with a diminished sensibility to vancomycin (VISA), enterococci resistant to vancomycin (VRE), pneumococci insensitive to penicillin, strains of multi- resistant Mycobacterium tuberculosis, Gram-negative bacteria which produce b-lactamases with broadened substrate spectra. (bats.ch)
In this section, we will focus on proteins involved in biofilm formation as useful targets for the development of new drugs that can effectively and specifically impair biofilm formation with slight effects on cell survival, thus avoiding the generation of drug-resistant strains. (intechopen.com)
Even before the pandemic it was well known that vaccines which fail to prevent transmission drive variant mutation towards the development of strains resistant to vaccines. (dailytelegraph.co.nz)
Nevertheless, BPH strains that are resistant to agricultural chemicals have developed, and BPH strains have appeared that are virulent against the resistant rice varieties. (biomedcentral.com)

The ability of a pathogenic virus to lie dormant within a cell (latent infection). (lookformedical.com)
The mechanism by which latent viruses, such as genetically transmitted tumor viruses ( PROVIRUSES ) or PROPHAGES of lysogenic bacteria, are induced to replicate and then released as infectious viruses. (lookformedical.com)

Rabbitpox virus is a subspecies of VACCINIA VIRUS . (lookformedical.com)

Here, we discuss bat predation by cats as a phenomenon bringing about zoonotic risks and illustrate cases of observed, suspected or hypothesized pathogen transmission from bats to cats, certainly or likely following predation episodes. (mdpi.com)

Anti-infective agents are secondary metabolites produced and obtained from a different sources (plants, bacteria, virus, fungi, and marine oceans) with antibacterial or antiviral properties. (benthamscience.com)

Previously in the 1960s, in vivo exposure of chickens and turkeys to certain live viruses was shown to increase the incidence of parthenogenesis as well as parthenogen size. (scialert.net)
L. C. Dunn breeds Strain 129, which later proves to have a high incidence of testicular cancer. (jax.org)

His studies on the physiological background of the mechanism of flowering of higher plants revealed some interaction between the role of vernalisation (mainly cold treatment) and the direct effect of the plant hormone Gibberellic acid. (wikipedia.org)
Apoptosis is a double-edged sword mechanism, which is used by the host to eliminate viruses and is manipulated by the virus to cause cytopathic effects in vitro and/or tissue damage in vivo [ 10 ]. (biomedcentral.com)

It can readily be embedded in extended models of the complete HIV-1 reverse transcription process, or analogous processes in other viruses and help to guide drug development and improve our understanding of the mechanisms of resistance development during treatment. (plos.org)
The NF-κB signaling pathway is an evolutionarily conserved pathway that regulates a variety of physiological and pathological processes, functioning as a crucial coordinator of inflammatory and immune response [ 14 ]. (biomedcentral.com)

Experimental injection of American Crows with the North American genotype of WNV (NY99 strain) has confirmed its highly pathogenic phenotype. (cdc.gov)
Satyabrata Sarkar, (born 1928 in Uttarpara near Calcutta, India), is a scientist, investigating physiological phenomena in plants and then studying the structure and function of plant-pathogenic viruses in the Max-Planck-Institute for Biology in Tübingen and at the University of Hohenheim in Germany. (wikipedia.org)

Fecal microbiota transplantation involves the transfer of gut microbes, viruses and luminal content to modulate a recipient's microbiome, for therapeutic purposes. (nature.com)
Anti-infective agents (antibacterial or antiviral) possess either a bactericidal/virucidal or bacteriostatic /virustatic ability against microbes and viruses. (benthamscience.com)

Working with the components of mutants of the tobacco mosaic virus (TMV) he analysed the behaviour of their coat proteins. (wikipedia.org)
Zentralblatt 77, 1-49,1958 Sarkar, S.: Interaction and mixed aggregation of proteins from tobacco mosaic virus strains. (wikipedia.org)

It also pin-points important parameters that may impact clinical efficacy of NA s used to treat other viruses. (plos.org)

A closely related virus that circulates in Australia (Kunjin [KUN]) has never been associated with outbreaks of human or animal diseases, including bird diseases, nor have bird deaths been reported from enzootic transmission foci in Africa, where a virus that shares 96.5% nucleotide identity with the NY99 strain has previously been isolated ( 16 , 17 ). (cdc.gov)
Virus diseases caused by the HERPESVIRIDAE. (lookformedical.com)
A general term for diseases produced by viruses. (lookformedical.com)
On the one hand, new strains of known diseases are emerging that are better adapted to changing climatic conditions and, on the other hand, there is a high risk of emerging or re-emerging diseases for which control strategies are limited or non-existent. (cultivar.fr)
COCs, the patch, and the ring do not protect against sexually transmitted diseases (STDs), including human immunodeficiency virus (HIV), and women using these methods should be counseled that consistent and correct use of the male latex condom reduces the risk for transmission of HIV and other STDs. (cdc.gov)

Researchers are trying to develop new approaches, but I think you can see that the rate of mutation and adaptation of the Covid-19 virus is likely to outstrip these efforts, as is the case for example with other coronaviruses such as the common cold and the flu. (dailytelegraph.co.nz)

Crow deaths were observed after West Nile virus (WNV) was introduced into North America, and this phenomenon has subsequently been used to monitor the spread of the virus. (cdc.gov)
Corvids, including the American Crow ( Corvus brachyrhynchos ), appear to be most susceptible ( 5 , 6 ), and corvid deaths have subsequently been used as a sentinel to track the spread of the virus ( 7 ). (cdc.gov)
In 1909, Landsteiner and Popper reported the identification of a virus, subsequently called poliovirus (PV), as the causative agent of poliomyelitis [ 20 ]. (springer.com)

He made pioneering use of fertile hen's eggs as hosts for virus multiplication. (todayinsci.com)
Moreover, The use of animals as surrogate rine host, can provide a platform for animal models for tumour viruses in hosts for the study of human tu- in vivo infection. (who.int)
Sub-Saharan Africa has been a natural laboratory for the evolution of sexually transmitted pathogens, including strains that can manipulate their hosts. (blogspot.com)

The strain is now valued as a source of embryonic stem cells for making knockout mice. (jax.org)

Overall, phagocytosis is considered a beneficial phenomenon, since it eliminates dead cells and induces an anti-inflammatory response. (frontiersin.org)
For instance, mice are able to reconstitute most lymphomas in monkeys and humans woodchuck hepatitis virus induces major components of the human provides strong support for a direct hepatocellular carcinoma (HCC) haematolymphoid system including oncogenic role of EBV in vivo. (who.int)

Indian Science Congress Association, life member Indian Phytopathological Society, life member Indian Virological Society, fellow Deutsche Phytomedizinische Gesellschaft Deutsche Virologische Gesellschaft Scientific papers Dutt, M., Sarkar, S. & Dutta, C.T.: Physiological studies on diploid and polyploid varieties of banana. (wikipedia.org)

Substances elaborated by viruses that have antigenic activity. (lookformedical.com)

The insect vectors of these viruses prosper in mild Winters. (cultivar.fr)

Adv. in Protein Chemistry 18, 37-121, 1963) Sarkar, S.: Relative infectivity of tobacco mosaic virus and its nucleic acid. (wikipedia.org)
33, 435-446, 1976 Sarkar, S.& Smitamana, P.: A truly coat-protein-free mutant of tobacco mosaic virus. (wikipedia.org)

Cellwall-free protoplasts of plant cells (mainly of tobacco and Chinese cabbage) were infected with viruses or with their RNA with a high efficiency and used for physiological investigations. (wikipedia.org)

Animals of the experimental group (n = 9) received single immunization intramuscularly with a preparation from the «Orlov-V» strain. (crie.ru)

A genus of the family HERPESVIRIDAE, subfamily ALPHAHERPESVIRINAE, consisting of herpes simplex-like viruses. (lookformedical.com)

To evaluate whether WNV-associated deaths in American Crows was due to infection by a more virulent genotype, we injected American Crows with NY99, a closely related WNV strain from Kenya (KEN) and a more distantly related WNV strain from Australia (KUN) and monitored viremia titers and illness. (cdc.gov)
Social events like death or illness in the family, strained relationships, and trouble with neighbors are some Examples of social stresses. (bseodisha.guru)

From 1959 he started with intensive studies on the structure and function of plant viruses and obtained his "Habilitation" from the University of Tübingen in 1969. (wikipedia.org)
Gen. Genetics 103, 244-247, 1968 Sarkar, S.: Use of protoplasts for plant virus studies. (wikipedia.org)
However, thereafter no further studies were conducted to better understand the role of viruses on parthenogenesis. (scialert.net)
cell for the virus is placed in a mu- studies costly and difficult. (who.int)

Hence, the objectives of this study were to determine the in vivo and in vitro effects of live pigeon pox (PP) virus as well as the in vitro effect of live Newcastle disease (ND) virus on parthenogenesis. (scialert.net)
The in vivo effect of live PP virus following vaccination and the in vitro effects of live PP and ND viruses following direct administration over the germinal disc of cultured quail eggs on parthenogenesis were determined. (scialert.net)
Moreover, under in vitro conditions, live ND virus was found to exert similar effects as live PP virus. (scialert.net)
These in vitro, and their expression in these human tumour virus. (who.int)

Seronegative to rubella virus female rhesus macaques in early pregnancy at the age of 4-7 years (n = 13) were used in the experiment. (crie.ru)

In addition, birds that survived challenge with the KEN or KUN viruses were challenged with a lethal dose of the NY99 strain to assess development of a cross-protective immunologic response. (cdc.gov)
Sarvella and Gehman 24 , reported that live fowl pox virus had no stimulating effect on parthenogenetic development following in ovo injection into chicken eggs. (scialert.net)

It appears that vaccination of virgin hens with live PP virus has the potential to increase parthenogenesis as well as parthenogen size by the direct action of the virus on the embryo. (scialert.net)

"The new mutations are building up quickly, most likely because they are providing the viruses with a big evolutionary edge" the NYT article reported. (dailytelegraph.co.nz)

In 1988, the WHO started its eradication program to eliminate the virus from the planet. (springer.com)

Animal models for human tumour mental animals is not easy to answer does induce adult T-cell leukaemia/ viruses that make use of animal virus- for these agents, because cancer bi- lymphoma (ATLL), albeit in monkeys es are scarce. (who.int)

Likewise, ND virus, an RNA virus, produces severe lesions in the poultry reproductive tract, thus impairing egg production and altering egg characteristics 1 , 2 . (scialert.net)

With the exception of bird deaths in Israel ( 8 ), where a strain 99.8% similar to the NY99 genotype has circulated since 1997 ( 9 ), no bird deaths have been reported during numerous well-characterized WNV epidemics in North Africa ( 10 ), Europe ( 11 - 13 ), Russia ( 14 ), and South Africa ( 15 ). (cdc.gov)

To celebrate 100 years of this seminal discovery, one of the first to show that a virus could cause a human disease, an international symposium was held on the 20 November 2009, in Vienna, Austria ( http://www.meduniwien.ac.at/100yearspolio ). (springer.com)
Background: Ebola Virus causes disease both in human and non-human primatesespecially in developing countries. (bvsalud.org)

Donor strain colonization and recipient strain resilience were mostly independent of clinical outcomes, but accurately predictable using LASSO-regularized regression models that accounted for host, microbiome and procedural variables. (nature.com)

Process of growing viruses in live animals, plants, or cultured cells. (lookformedical.com)

Synergism between potato virus x and potato virus y was studied in vivo by classical methods as well as by ultrastructural, i.e. electronmicroscopic techniques. (wikipedia.org)

Based on the outcomes found, the role of information in the production of this phenomenon was discussed, considering the features of the Brazilian context. (bvsalud.org)

These results show that LMP1 , mour viruses classified by IARC in EBV-specific T-cell response. (who.int)
The physiological results provided evidence for a simple but invaluable fact: the aging process is indeed less fixed than most people think. (harvardmagazine.com)

Virus shedding is an important means of vertical transmission (INFECTIOUS DISEASE TRANSMISSION, VERTICAL). (lookformedical.com)

By supplying a refuge to phage-sensitive strains, we show that seed banks retained phenotypic diversity that was otherwise lost to selection. (nature.com)

The expelling of virus particles from the body. (lookformedical.com)

Considering its initial appearance, the SARS-CoV-2 virus responsible for COVID-19 has undergone significant changes. (cbirt.net)

Vol.6, 435-456, Academic Press, New York, 1977 Matthews, R.E.F. & Sarkar, S.: A light-induced structural change in chloroplasts of Chinese cabbage cells infected with turnip yellow mosaic virus. (wikipedia.org)

Anatomy1

Organisms17

Diseases1

Chemicals and Drugs5

Analytical, Diagnostic and Therapeutic Techniques and Equipment3

Phenomena and Processes34

Information Science3

Virulent strains3

Virulence4

Vaccine11

Bacterial3

Viral4

Determinants1

Differential3

Materials and Met1

Molecular3

Populations4

Avian4

Infect2

Genetic6

Coronavirus2

Natural phenomenon2

Species8

Resistant4

Latent2

Vaccinia1

Zoonotic1

Bacteria1

Incidence2

Mechanism2

Processes2

Pathogenic2

Microbes2

Proteins2

Efficacy1

Diseases5

Mutation1

Subsequently3

Hosts3

Embryonic1

Induces2

Varieties1

Substances1

Vectors1

Protein2

Efficiency1

Experimental1

Herpes1

Illness2

Studies4

Vitro4

Rhesus1

Development2

Vaccination1

Evolutionary1

Eliminate1

Monkeys1

Severe1

Exception1

HUMAN2

Clinical1

Plants1

Vivo1

Role1

Results2

Transmission1

Show1

Body1

Appearance1

Cells1