Progressive atrophic rhinitis (PAR) is a disease affecting swine. It is characterized by inflammation and eventual distortion of the nasal turbinate bones. The condition is usually caused by toxins produced by specific strains of Pasteurella multocida and, to a lesser extent, Bordetella bronchiseptica. Affected animals exhibit sneezing, snorting, coughing, and often mucopurulent nasal discharge. The severity of the symptoms can vary, but in severe cases, visible shortening or lateral deviation of the snout may be observed.
The significance of controlling progressive atrophic rhinitis stems from its impact on the economic viability of swine production. Reduced growth rates, increased susceptibility to secondary respiratory infections, and compromised feed efficiency contribute to financial losses. Historically, outbreaks have caused substantial disruptions in the swine industry, leading to extensive research and development of preventative measures and treatment strategies. Eradication programs and improved management practices play a crucial role in mitigating the effects of this disease.