| an abattoir survey of pneumonia and pleuritis in slaughter weight swine from 9 selected herds. iii. serological findings and their relationship to pathomorphological and microbiological findings. | blood samples from 777 pigs, originating from 9 different herds, were collected at slaughter and examined for antibodies to mycoplasma hyopneumoniae and actinobacillus (haemophilus) pleuropneumoniae by the indirect hemagglutination assay (iha) and the complement fixation (cf) test, respectively. results were compared to pathological and microbiological findings. antibodies to m. hyopneumoniae in positive titers of 1/80 or higher were found in 62% of the samples. the relationship between positive ... | 1991 | 1950854 |