The acute outbreaks of Newcastle disease on commercial poultry farms in Pakistan and Afghanistan over the last five months have been blamed on poor vaccines.
According to the Veterinary Research Institutes in Peshawar, Pakistan, while there may have been a change in the genetics of the field virus, the more likely explanation to birds’ poor response to vaccination is the quality of vaccines themselves, their storage and administration.
The Veterinary Research Institutes said that not only is the quality of vaccine supplied by registered manufacturers poor, there are also a number of non-authorized manufacturers supplying vaccines. Storage facilities at manufacturing and retail level are poor, as is vaccine administration. Additionally, there are reports that antivirals registered only for human use are being applied on poultry farms and this could have implications for viral resistance.