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- W4291019871 abstract "Infection and immunity studies involving genetically modified organisms (GMOs), such as gene knockout bacterial mutants, require stringent physical containment to prevent the accidental spread of these organisms into the environment. Experimental respiratory tract infection models often require the animals, for example birds, to be transported several times between a negative pressure housing isolator and a bespoke aerosol exposure chamber under positive pressure. While the exposure chamber is sealed and fitted with HEPA filters, the repeated movements of infected animals and opening of the chamber can still pose a serious risk of breaching containment of the organism in the experimental facility. In the current study, the ability of two aerosol infection protocols that expose birds to avian pathogenic E. coli (APEC) aerosols directly within the housing isolator was evaluated. Young chicks were exposed to APEC E956 within the negative pressure housing isolators using either a nebulizer or an atomizer. Birds exposed twice (days 1 and 4) to aerosols of APEC E956 produced by the nebulizer developed a rapidly progressing disease mimicking field cases of avian colibacillosis. However, birds exposed to aerosols of APEC E956 produced by an atomizer did not develop colibacillosis even after three exposures to APEC E956 on days 1, 4 and 7. Consequently, the current study reports the nebulizer was more efficacious in producing avian colibacillosis under stricter bacterial containment settings.RESEARCH HIGHLIGHTS Two aerosol exposure methods were evaluated to develop avian colibacillosis.Nebulizer method found to be more efficient in reproducing avian colibacillosis.Refined infection method can be used to study genetically modified organisms (GMOs)." @default.
- W4291019871 created "2022-08-13" @default.
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- W4291019871 date "2022-09-30" @default.
- W4291019871 modified "2023-10-16" @default.
- W4291019871 title "Nebulization as a more efficient method than atomizer for experimental reproduction of avian colibacillosis in young chickens" @default.
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- W4291019871 doi "https://doi.org/10.1080/03079457.2022.2112656" @default.
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