Some pathological characteristics of the piglets suffering with diarrhea caused by Rotavirus

Abstract

A total of 103 diarrheal piglet samples were collected in 6 Northern provinces, Viet Nam for study on the pathology caused by rotavirus. The results of RT-PCR technique showed that 14 samples were positive with rotavirus and co-infection with other virus and bacteria was not found. The clinical symptoms of the piglets suffering with diarrhea by rotavirus were detected mainly in the digestive system, the severe symptom was diarrhea (100%); yellow or white feces with milk residues (85.71%). In addition, the rotavirus infected pigs presented several clinic signs, such as: moodiness, tiredness, drinking plenty of water, loss appetite and decline. The necropsy result of the rotavirus infected piglets indicated that the lesions were mainly occurred in the small intestine, such as the intestinal wall was thin, stretched, containing milk residue (90-100%). The histological lesions were mainly occurred on top of the intestinal villi (100%), it was blunt, gradually disappeared, thus reduced digestibility, nutrition absorption. The lesions in the intestine segments were heavier than that on the duodenum and jejunum with the manifestations of congestive, inflammatory, infiltrated cells and corrosive villi in most of the studied samples.