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Effect of pneumonia on growth rate and feed efficiency of minimal disease pigs exposed to actinobacillus pleuropneumoniae and mycoplasma hyopneumoniae



Effect of pneumonia on growth rate and feed efficiency of minimal disease pigs exposed to actinobacillus pleuropneumoniae and mycoplasma hyopneumoniae



Preventive Veterinary Medicine 9(4): 287-294



Pigs from a minimal disease herd were exposed to pneumonia through contact with pigs infected with Actinobacillus pleuopneumoniae and Mycoplasma hyopneumoniae. Growth rate, feed efficiency, extent of pneumonia lesions at necropsy and as determined radiographically, and clinical signs of appetite, coughing, sneezing, dyspnea and lethargy were recorded for each pig. Pneumonia occurred as an active, slowly progressive infection during the trial. Coughing was not a good indicator of severity of pneumonia. Increasing severity of pneumonia (measured radiographically or at slaughter) was negatively correlated with performance during the finishing period. Data from this trial support a model that had been developed to relate performance effect to severity of pneumonia.

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Accession: 007256843

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DOI: 10.1016/0167-5877(90)90074-r


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