*Responsible for secondary infections following primary viral and mycoplasmal infections, especially in the lungs, for example during pig enzootic pneumonia
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*Responsible for secondary infections following primary viral and mycoplasmal infections, especially in the lungs, for example during [[Bacterial infections#Enzootic pneumonia of calves|Enzootic pneumonia of calves]] and pigs
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*May contribute to [[Bacterial infections#Enzootic pneumonia of calves|Enzootic pneumonia of calves]]