Influenza tipo a pdf

Influenza b virus is the only species in the genus betainfluenzavirus in the virus family orthomyxoviridae influenza b virus is only known to infect humans and seals with influenza. Waterfowl are important reservoirs for many subtypes of influenza. Realtime rtpcr protocol for the detection of avian. Influenza a and b are the two types of influenza that cause epidemic seasonal infections nearly every year. Influenza in humans is often referred to as the seasonal flu. Cdc protocol of realtime rtpcr for influenza ah1n1 28 april 2009 revision 1 30 april 2009 revision 2 6 october 2009 the who collaborating centre for influenza at.

The who collaborating center for reference and research on influenzaat the chinese national influenza center, beijing, has made available attached realchina, time rtpcr protocol for the detection of avian influenza ah7n9 virus. Type a influenza is a contagious viral infection that can have lifethreatening complications if left untreated. Influenza diagnosis clinical and epidemiological characteristics increase of febrile respiratory illness lab isolation of influenza virus from clinical specimen e. This work is licensed under a creative commons attribution. Influenza a symptoms can be confused with signs of other conditions but are usually. They are more closely related to each other than to influenza virus a iva or influenza virus b ivb, containing seven genomic segments and a hemagglutininesterase he. We also determined the distribution of positive and negative samples at county level in ireland online technical appendix figure 2. Influenza a can be found in many species, including humans, birds, and pigs. Avian influenza ah7n9 virus 8 april 20 updated on 15 april 20. Influenza a viruses are divided into subtypes based on two proteins on the surface of the virus. Influenza d viruses primarily affect cattle and are not known to infect or cause illness in people.