Abstract
Summary Because of the importance of environmental survival of pseudorabies virus to proposals to eradicate the virus from swine in the United States, survival of the virus was studied in various diluents and on combinations of diluents and solid fomites at 25 C. Suspensions of the virus in phosphate-buffered saline and saline G solutions remained infectious for at least 10 days. Infectivity of other virus/diluent suspensions decreased to <10 plaque-forming units/ml in 14 days (swine urine), 7 days (well water), 4 days (swine saliva), 2 days (lagoon water and swine nasal washings), and 1 day (swine pit effluent, chlorinated water, and bile). Suspensions of pseudorabies virus in saline G solution and on the solid fomites, whole corn, and steel remained infectious for at least 7 days. Infectivity of other virus/diluent/fomite combinations decreased to <10 plaque-forming units/ml in 7 days. The role of the fomites as vehicles for transmission of infection is discussed.
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