2024年9月17日 · Antigenic drift can sometimes result in a person becoming susceptible to flu virus infection again, as antigenic drift has changed the virus' antigenic properties enough that a person's existing antibodies won't effectively recognize and neutralize the …

Two subtypes of viruses (e.g., human and swine influenza) infect the same cell and exchange genetic segments (reassortment) to create new subtypes (e.g., H3N1 → H2N1). Small shifts in …

2022年1月7日 · Antigenic shift refers to the gene recombination occurring when influenza viruses re-assort. Mutations causing minute changes in the hemagglutinin and neuraminidase antigens on the surface of the Influenza virus is termed antigenic drift.

How Flu Viruses Can Change: "Drift" and "Shift" One way influenza viruses change is called "antigenic drift." Drift consists of small changes (or mutations) in the genes of influenza viruses that can lead to changes in the surface proteins of the virus, HA (hemagglutinin) and NA (neuraminidase).

2022年8月10日 · They are Antigenic Shift and Antigenic Drift. Occurs as a results of genome reassortment between difference subtypes. Occurs as a result of the accumulation of point mutations in the gene. An antigenic change which results in drastic or dramatic alternation in HA (hemagglutinin) or NA (neuraminidase) subtypes.

2024年5月21日 · The primary distinction between antigenic drift or antigenic change is the fact that antigenic drift is a way to create change in viruses that is caused by the accumulation of mutations in genes that encode for antigen-binding sites, whereas antigenic shift is a method of combining two kinds of viruses to create one new type that has an ...

Influenza virus has two ways to change — one slow and one fast. The slow change is called “drift” — the virus gradually accumulates individual mutations until its surface proteins are no longer recognized by our immune system.

While both antigenic drift and antigenic shift involve changes in viral antigens, they differ in several key aspects: Speed: Antigenic drift is a slow and gradual process that occurs over time, while antigenic shift is a sudden and significant change.

Antigenic drift refers to slow, ongoing mutations that result in seasonal fluctuations in the flu, whereas antigenic shift refers to abrupt, significant changes that have the potential to trigger pandemics.

2023年7月5日 · Antigenic shift and drift explain influenza viral evolution. Antigenic drift occurs when genetic changes cause modest antigenic differences, whereas antigenic shift occurs when strains exchange genetic material, creating new subtypes. Researchers may detect, prevent, and control worldwide influenza epidemics by understanding these mechanisms.