2016年10月4日 · We know how the flu is spread. We know the importance of getting a flu shot. But what we may not know is the difference between the strains, and how they are named. While a bit "inside biology" for some, here's what these names mean and how they come about -- a look into the virology behind the influenza virus.

It is often referred to simply as "bird flu" or "avian influenza", even though it is only one of many subtypes. A/H5N1 has killed millions of poultry in a growing number of countries throughout Asia, Europe, and Africa.

Swine influenza virus (SIV) or swine-origin influenza virus (S-OIV) refers to any strain of the influenza family of viruses that is endemic in pigs. [2] . As of 2009, identified SIV strains include influenza C and the subtypes of influenza A known as …

Six H2N5 influenza viruses were isolated. This is the first report of the isolation of the H2 subtype from shore birds in Australia. Phylogenetic analysis revealed that the M gene belonged to the American lineage of avian influenza viruses and the other genes belonged to the Eurasian lineages, indicating that genetic reassortment occurs between ...

具有高 致病性 的 H5N1 、 H7N7 、 H7N9 、 H9N2 等禽流感病毒，一旦发生变异而具有人与人的传播能力，会导致人间禽流感流行，预示着禽流感病毒对人类已具有很大的潜在威胁。 流感病毒的变异以甲型最为重要，常与世界性 大流行 有密切联系。 一般来讲，流感病毒的 抗原性变异 就是指H和N抗原结构的改变，在亚型内部经常发生小变异 (量变)，称为 抗原漂移。 尽管它只是微小的变异，但可使病毒能够轻易的躲过宿主的 免疫系统。 与以前面发现的 毒株 相比，如果在 血凝 …

2024年9月17日 · Full genome sequencing can reveal the approximately 13,500-letter sequence of all the genes of the influenza virus's genome. The two influenza types (A and B) that cause seasonal epidemics have eight RNA gene segments. These genes contain instructions for making new viruses and play an important role in how influenza viruses cause infection.

2023年6月23日 · Currently, circulating influenza viruses include two IAV subtypes H1N1 and H3N2, and two IBV lineages (B/Yamagata and B/Victoria). Some animal IAVs, particularly bird and swine flu, can occasionally spill over to cause zoonotic infections in humans. In recent years, avian H5 and H7 viruses caused human infections with a high case fatality rate.

乙型流感病毒 （Influenza B virus），是由乙 (B)型流感病毒引起的流行性感冒，其特点是起病急骤，畏寒、发热，体温在数小时至24小时内升达高峰，39-40℃甚至更高。 卡梅德生物 （KMD Bioscience）作为生物原料供应商，开发了涵盖传染病、生育类、心脏标志物、肿瘤标志物、炎症类和血清蛋白类等领域的抗原和抗体，广泛应用于免疫层析、ELISA、化学发光、PCR等各个技术平台。 历经多年的创新发展，公司搭建了多个技术平台，包括胶体金/乳胶免疫层析技术平台 …

During the first half of March 2021, World Health Organization (WHO) laboratories found 375 positive influenza specimens among 291,427 specimens from 85 countries – 35.2% type A and 64.8% type B. 1 Of the type A viruses, 6.1% were influenza A (H1N1)pdm09 and 93.9% were influenza A (H3N2).

H2N3 is a subtype of the influenza A virus. Its name derives from the forms of the two kinds of proteins on the surface of its coat, hemagglutinin (H) and neuraminidase (N). H2N3 viruses can infect birds and mammals.