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USDA issues root cause investigation report for swine enteric coronavirus diseases

The scenario that best fit the criteria for virus entry into the U.S. was virus spread through reuse of contaminated Flexible Intermediate Bulk Containers (FIBC).

Friday 2 October 2015 (2 years 10 months 15 days ago)
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The United States Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) released a root cause investigation report outlining potential scenarios for how the Swine Enteric Coronavirus Disease (SECD) viruses entered the United States. APHIS examined seventeen potential root cause scenarios, looking to see if they meet all four criteria needed to bring the virus from an overseas location to US pig farms, as well as if there was evidence to support the scenario. While the investigation did not uncover definite proof for any route of entry, a small number of scenarios were deemed plausible.

The scenario that best fit the criteria for virus entry into the U.S. was virus spread through reuse of contaminated Flexible Intermediate Bulk Containers (FIBC). FIBCs are commonly used to transport many types of material including sand for flood control, soybeans, pet treats, or almost any kind of bulk material. They are designed to be reused. It is not a common practice to clean and disinfect these FIBCs between uses in the United States. Evidence collected as part of the investigation suggests that the FIBCs could be potentially contaminated in their origin country and, upon arrival in the United States, are likely being reused. If a contaminated FIBC was used to transport bulk feed or ingredients to the swine feed mill networks, a small bit of contaminated material could have been mixed into feed destined for many locations and spread the virus onto farms.

APHIS completed follow-up testing in attempt to provide evidence for this scenario. This follow-up testing further supports the hypothesis that PED virus could easily remain stable through the time needed to travel to the United States and infect pigs.

 

Wednesday September 30, 2015/ APHIS/ United States.
https://www.aphis.usda.gov

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