title: Survival of toxigenic Pasteurella multocida in aerosols and aqueous liquids.
abstract: The survival of toxigenic Pasteurella multocida in air and liquids was studied to identify possible risk factors in the etiology of atrophic rhinitis. In aerosols, at low relative humidity (28%), the viability of toxigenic P. multocida 5 min after aerosolization was at least 22% of its initial value. Viability at low relative humidity declined to 8% after 45 min. Viability at high relative humidity (79%) was 69% after 5 min and declined to 2% after 45 min. Survival of toxigenic P. multocida in liquids depended on storage and constituents in the liquid. Toxigenic P. multocida became nonculturable 1 to 14 days after inoculation in water and artificial seawater, depending on the storage temperature. Toxigenic P. multocida stored at 37 degrees C could be detected for up to 6 days in pig slurry and more than 36 days in Bacto Tryptose broth and nasal lavages. However, in Bacto Tryptose broth and nasal lavages stored at 4 degrees C, P. multocida was detected for up to 14 days whereas at 15 and 37 degrees C it was detected for more than 49 days. These results suggest that aerosols and fomites can play a role in the transmission of atrophic rhinitis.
authors.affiliation: Institute for Animal Health, Newbury, Berkshire, United Kingdom.
authors.forename: C M
authors.initials: CM
authors.lastname: Thomson
authors.forename: N
authors.initials: N
authors.lastname: Chanter
authors.forename: C M
authors.initials: CM
authors.lastname: Wathes
mesh_terms: D000336:Aerosols; D000818:Animals; D006813:Humidity; D016979:Pasteurella multocida / Q000254:growth & development*; D012222:Rhinitis, Atrophic / Q000209:etiology; D012996:Solutions; D013552:Swine
chemical_list: D000336:Aerosols; D012996:Solutions