Infectious Diseases 2018

Infectious Diseases 2018

More H7 LPAI cases in Stanislaus County California

Source: Egg-News 22 September, 2018

The third and fourth poultry flocks in Stanislaus County, California have been reported as presumptive positive H7 strain applying PCR assay according to authorities in California.  Samples from both flocks have been referred to the National Veterinary Services Laboratory (NVSL) in Ames IA. for confirmation and molecular characterization. The third flock was confirmed positive for H7 strain AI by PCR on September 19th 2018 by NVSL.  
The third flock of 23,700 non-commercial mixed poultry (pastured chickens, ducks, and turkeys) was located within the 2-mile zone of the index flock of 26,000 turkeys diagnosed in Stanislaus County has been quarantined and hopefully confined to prevent further dissemination of AI virus.
The fourth flock of 116,000 commercial organic light seven week-old turkeys located within the 2-mile zone has been quarantined.
The index and second flocks have been depopulated (35,000 turkeys were present in the 2nd flock). The cluster of H7N3 LPAI cases, all with presumed outside access, based on reports of organic status demonstrate the vulnerability of flocks which are not confined to barns with netting to exclude wild birds.
Stanislaus County has a high population of commercial egg production and turkey growing flocks which would be at risk if wild bird reservoirs are present and if there are deficiencies in biosecurity.