Morbidity, seroconversion, and respiratory viral replication of ferrets inoculated with wild bird avian influenza viruses H1N9 and H6N1.

aTemperature is in degrees Celsius.bLimit of detection for nasal wash 1.5 log10 TCID50/mL.cLimit of detection for lung day 7 pi both viruses and day 3 pi for H6N1 is 1.3 TCID50/g; for days 2 and 3 pi for H1N9 is 1.0 TCID50/g.dOne control ferret potentially had an unrelated infection, but remained influenza seronegative.eNot done.fTested against both H6N1 and H1N9.