Volume 25, Number 12—December 2019
Dispatch
Half-Life of African Swine Fever Virus in Shipped Feed
Figure

Figure. Decay of African swine fever virus (ASFV) Georgia 2007 in feed ingredients exposed to temperature and humidity conditions simulating a 30-day trans-Atlantic shipment. A) Temperature and humidity conditions, which fluctuated every 6 hours during the course of the 30-day environmental model. Environmental conditions were based on the availability of historical data logged from April 5, 2011, through May 4, 2011 (5,11) to model trans-Atlantic shipment from Warsaw, Poland, to Des Moines, Iowa, USA. B) Mean TCID50 of ASFV Georgia 2007 quantified on porcine alveolar macrophages at 1, 8, 17, and 30 days after contamination for different types of feed and controls. Feed ingredients were inoculated with 105 TCID50 ASFV based on previous half-life calculations (5,10) and the infectious dose in feed (6). TCID50, 50% tissue culture infective dose.
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