antigenic drift वाक्य
उदाहरण वाक्य
मोबाइल
- H9N2 viruses isolated from chickens in China showed antigenic drift that evolved into distinct antigenic groups.
- Antigenic drift occurs in both and viruses.
- One is called " antigenic drift, " which is small hanges that take place in the virus.
- Influenza virus C is only capable of antigenic drift whereas type A undergo antigenic shift, as well.
- The conserved epitopes are common to most human flu virus strains regardless of their antigenic drift and shifts.
- Antigenic drift creates influenza viruses with slightly modified antigens, while antigenic shift generates viruses with entirely novel antigens.
- All influenza viruses experience some form of antigenic drift, but it is most pronounced in the influenza A virus.
- This antigenic drift may have led to immunization failure and may explain the current prevalence of the H9N2 influenza virus in China.
- Glycoproteins may undergo mutations ( antigenic drift ) or reassortment in which a new HA or NA is produced ( antigenic shift ).
- To meet the challenge of antigenic drift, vaccines that confer broad protection against heterovariant strains are needed against seasonal, epidemic and pandemic influenza.
- "' Antigenic drift "'is a mechanism for variation in viruses that involves the accumulation of mutations within the genes that code for antibody-binding sites.
- Usually, the mutations are minor, a process called antigenic drift that results in small changes in the two major proteins on the virus'surface, hemagglutinin and neuraminidase.
- They targeted the virus'gene for neuraminidase because, unlike other parts of the virus, the enzyme remains stable and does not change forms in the antigenic drift process.
- Equine influenza virus ( EIV ) undergoes continuous antigenic drift, and vaccine protection from immunogenic stimulation is maximised when vaccines strains have greater homogeneity to circulating strains.
- An illustration explaining how "'antigenic shift "'in the phenotypic change, and should not be confused with antigenic drift, which is the natural mutation over time of known viral strains.
- Antigenic drift occurs in all types of influenza including influenzavirus A, influenza C . Antigenic shift, however, occurs only in influenzavirus A because it infects more than just humans.
- By constantly changing its own genetic makeup, in a process epidemiologists call " antigenic drift, " the flu virus evades human immune systems and has frustrated efforts to develop vaccines.
- Antigenic variation may be classified into two types, antigenic drift that results from a change in few amino acids and antigenic shift which is the outcome of acquiring new structural proteins.
- Antigenic drift has been responsible for heavier-than-normal flu seasons in the past, like the outbreak of influenza H3N2 variant A / Fujian / 411 / 2002 in the 2003 2004 flu season.
- While antigenic drift ( the gradual change of surface antigens ) is considered the traditional model for changes in the viral genotype, recent evidence suggests that selective sweeps play an important role as well.
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