Porcine proliferative enteropathy: Preliminary epidemiological and pathological observations in Belgian pig herds
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Veterinary Sciences
Vlaams diergeneeskundig tijdschrift. - Antwerpen
, p. 231-236
University of Antwerp
A field study was conducted in 20 Belgian pig herds suffering from chronic intestinal disease to provide information on the epidemiology and pathology of porcine proliferative enteropathy (PPE), an infectious disease caused by Lawsonia intracellularis. From each herd, a representative number of fattening pigs were examined in the slaughterhouse for the presence of heal thickening. Transverse sections of five thickened pea per herd were investigated for the histopathological lesions suggestive for PPE and for presence of L. intracellularis using Warthin-Starry silver staining. The mean percentage of slaughter pigs per herd with thickened ilea was 24%; the minimum and maximum percentages were 10% and 49%, respectively. The following histopathological lesions were found: crypt-abscesses (20% of pigs), decreased number of goblet cells (90%), hypertrophy and hyperplasia of crypt epithelial cells (3%), hypertrophy of both outer muscle coats (78%), increased number of eosinophils (34%) and lymphoid hyperplasia in the lamina propria (90%). L. intracellularis was demonstrated in five out of 100 thickened ilea (5%). These ilea originated from three different herds. This study is the first to report on infections with L. intracellularis in Belgian pig herds with enteric disease. Thickening of the ileum was very common in slaughter pigs from these herds.