The prevalence of pneumonia, pleuritis, pericarditis and liver spots in Danish slaughter pigs (1994) [plucks]

abattoir abattoirs actinobacillus cerdo effectif du cheptel foie liver livestock numbers lungs mataderos micoplasmosis morbidite morbidity morbosidad mycoplasmose mycoplasmoses necropsie pericardio pericardite pericarditis pericardium pleura pleuropneumonia pleuropneumonie pneumonia pneumonie porcin postmortem examination poumon pulmones seasonal variation sex sexe sexo swine