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1. What is atrophic rhinitis?

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Atrophic Rhinitis (AR) is present in every country where there is pig production, and it has two presentations: Progressive Atrophic Rhinitis (PAR) in fattening pigs, which is caused by Pasteurella multocida type D, and Non-Progressive Atrophic Rhinitis (NPAR) in nursery pigs, which is produced by Bordetella bronchiseptica.

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