title: The effects of spraying on the amounts of airborne foot-and-mouth disease virus present in loose-boxes.
abstract: The air of loose-boxes which had previously held pigs infected with foot-and-mouth disease was sampled for virus after various procedures. Removal of infected pigs led to a 12- to 16-fold reduction in the amount of virus after 5 min. and a 400-fold reduction after 60 min. After heavy spraying (1.2 mm. of water in 5 min.) the amount of virus was reduced 500-fold compared to 30-fold after light spraying (0.20 mm. of water in 5 min.). The partition of infectivity associated with particle size was measured. The partition found after light spraying was similar to that found 5 min. after the pigs had been removed. Heavy spraying brought about a reduction in the infectivity associated with the large particles (> 6 mum.) but had no effect on particles less than 3 mum. A similar partition was found 60 min. after the pigs had been removed. The findings are discussed in relation to the spread of foot-and-mouth disease by the airborne route.
mesh_terms: D000391:Air Microbiology; D000818:Animals; D005537:Aphthovirus / Q000302:isolation & purification* / Q000472:pathogenicity; D005536:Foot-and-Mouth Disease / Q000517:prevention & control; D006799:Housing, Animal; D013552:Swine; D013553:Swine Diseases / Q000517:prevention & control; D013997:Time Factors; D014867:Water
chemical_list: D014867:Water