Disease
Infection in Chickens with LPAI and other Viruses
It has been shown that the low pathogenic serotype Influenza A H9N2 can enhance or cause disease in chickens concurrently infected with other viruses.
Viral infections that can play a role in disease problems caused by H9N2 infections
- Fowl Adenovirus
- REO virus
- Infectious Bronchitis
- Newcastle Disease
Vaccination for Protection
Trials have shown that:
- Protection can be acheived by efficient vaccination against concurrent virus infections.
- H9N2 vaccination may be necessary to complement standard vaccination programs.
Avian Influenza A H9N2 and/or Fowl Adenovirus FAV-4 (serotype 4)
4 weeks old SPF chickens were challenged with AVI H9N2 (intrnasal) or FAV-4 (intramuscular) or both and observed for two weeks.
Avian Influenza A H9N2 and REO -ERS
SPF chickens were vaccinated with REO (live vaccine, strain 2177) when day old. At an age of three weeks the chickens were challenged with AVI H9N2 (aerosol, intranasal and intravenous route) or REO-ERS (footpad route) or both and observed for 2 weeks.
Avian Influenza A H9N2 and IBV M41
Day-old SPF chickens were challenged with AVI H9N2 (intranasal) or IBV M41 (ocular) or both and observed for three weeks.
Avian Influenza A H9N2 and/or NDV (strain Beaudette)
Three weeks old SPF chickens were challenged with AVI H9N2 (intranasal) or NDV Beaudette (ocular) or both and observed for two weeks.
