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Third Riverside County Egg-production Farm Diagnosed with vvND

01/11/2019

According to a January 10th APHIS release a commercial egg-production farm with 100,000 hens was diagnosed with vvND. The unit is located in Riverside County approximately five miles from the second case diagnosed last week.

 

Since the first infection in a commercial pullet-rearing farm was diagnosed during the last week of 2018 intensive surveillance has been carried out to detect emerging cases that are not readily apparent in vaccinated flocks within a week of introduction of infection. Epidemiologic studies are in progress to ascertain the factors involved in dissemination of the virus from the endemic reservoir represented by fighting cocks in Los Angeles, San Bernardino and Riverside Counties. The California Department of Food and Agriculture and APHIS did little other than diagnose over 240 individual cases and keep score from May through November 2018.

 

Many commercial farms in California lack investment in structural biosecurity and hence function with inadequate operational biosecurity. This situation creates vulnerability to introduction of catastrophic viral diseases. “Danish entry” systems are suitable for Denmark where family-operated farms of 10,000 hens are the norm. The risks and consequences of AI or ND dictate a higher level of protection in the U.S. including shower-on-shower-off protocols, thorough decontamination of vehicles and other precautions. “Feel-good” measures are effective only as long as there is no exposure!