Abstract
After exposure to airborne African swine fever (ASF) virus for 6 days on a platform 2·3 m above 8 infected donor pigs, the distribution of virus in selected tissues of 10 recipient pigs was determined at 2-day intervals over the following 8 days. Virus was not detected in any of the tissues obtained from 2 pigs killed 0 and 6 days after exposure and 5 pigs had developed generalized infection between 2 and 8 days after exposure. The titres of virus in the lymph nodes draining the lower respiratory tract of 3 pigs were considerably greater than those in the nodes draining the upper respiratory tract, and it is concluded that the primary route of infection in these pigs was through the lower respiratory tract.
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