Predictive value of multiple drag-swab sampling for the detection of Salmonella from occupied or vacant poultry houses.
Caldwell DJ, Hargis BM, Corrier DE, Williams JD, Vidal L, DeLoach JR. Predictive value of multiple drag-swab sampling for the detection of Salmonella from occupied or vacant poultry houses. Avian Dis. 1994 Jul-Sep; 38(3):461-6.