*''B. bronchiseptica'' causes [[Nasal Cavity Inflammatory - Pathology#Bacterial rhinitis|Atrophic rhinitis of pigs]] in association with [[Pasteurella multocida|''Pasteurella multocida'']]
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*Colonises nasopharynx
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*Infection must occur during first few weeks of life
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*Produces dermonecrotic toxin which damages osteoblasts, preventing bone formation
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*Leads to turbinate atrophy without distortion of the snout in uncomplicated infections
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*[[Nasal Cavity Inflammatory - Pathology#Bacterial rhinitis|Atrophic rhinitis]] results when [[Pasteurella multocida|''Pasteurella multocida'']] colonises and produces osteolytic toxin, leading to bone resorption
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*Malformation of snout in growing pigs as well as poor growth
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*increases with high stocking density and poor ventilation