Atrophic Rhinitis

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