Question

1- Human cases of H7N9 influenza have been associated with what 2 events in poultry populations?

2- Discuss reasons why 2009 H1N1 is isolated on fewer surfaces when compared to seasonal H3N2 influenza? (Explain the question please with the answer)

Answer 1

1. H7N9 infection in people has been associated with close contact with infected live or dead birds, and H7N9- contaminated environments.

2. People infected with Influenza A H1N1 2009 can shed the virus and potentially infectious one day prior to illness onset until resolution of fever. Viral shedding can continue for at least 7 days or longer periods, for example young infants and the immunocompromised. This virus can only be collected from the nasopharynx (a nasopharyngeal swab), nasopharyngeal aspirates, throat swabs and transbronchial aspirates. On the other hand, influenza A virus subtype H3N2 (A/H3N2) is a subtype of viruses that causes influenza (flu). They can infect birds and mammals. In birds, humans, and pigs, the virus is able to be mutated into many strains. H3N2 is increasingly abundant in seasonal influenza.