3,354 fattening pigs were examined. Gross pathologic alterations of the stomach were classified as normal, with epithelial change, erosion, ulcer and scar formation. In the seasonal prevalence of gastric ulceration, severe ulceration with erosion was shown during autumn and winter, whereas mild ulceration was mainly shown during spring and summer. Of the 3,354 pigs examined, 20.7% were found to be normal. Of the rest, 40% had epithelial changes, followed by erosion (24.7%), ulcer (13.6%) and scar formation (0.9%), respectively. In the prevalence of ulcers in the different regions of the stomach, the fundic region had the highest rate (61.6%) of ulceration, followed by cardiac (21.7%), esophageal (15.0%) and pyloric region (1.7%). The principal gross changes were severe epithelial changes with keratotic proliferation in the esophageal region, and in the fundic region, severe folding of the stomach wall was covered with bloody mucous exudates. Main histopathological changes were inflammatory cell infiltrations in most cases, hemorrhages in acute ulcers and prominent proliferation of granulation tissues in chronic ulcers

This is a study of bovine viral leukosis in a young cattle (10 months old). Main clinical symptoms observed were emaciation, digestive disorder, and marked enlargement of superficial lymph nodes. Biopsied specimen of the lymph nodes revealed a characteristics histological picture of bovine leukosis. A severe degree of leukocytosis (108,000/cmm) accompanied by marked lympocytosis (96%=680/cmm) was detected from the hematological examination of peripheral blood. Most of the lymphocytes (94%=101,520) were large-sized, immature, and abnormal in their morphology. In addition, a pronounced anemia (1.78 million/cmm) without regenerative evidence of erythrocyte was noted. The serum of the patient showed positive reaction against gp antigen of bovine leukosis virus in agar gel diffusion test

This paper dealt with histopathological observations of the nephroblastoma in the pregnant pig which died 8 days before parturition day. In the necropsy findings the pregnant pig died of circulative and respiratory disturbance by compression of fetus and renal tumor weighing about 12 kg. In the microscopical findings of the renal tumor it was composed of well differentiated tumor cells and connective tissue elements. As differentiation of the neoplastic epithelial cells progressed, tubular and cystic structures, and papillary structures resembling glomeruli appeared. This tumor was regarded as nephroblastoma

An acute enteric disease accompanied with vomiting diarrhea, anorexia, pyrexia, dehydration and high mortality occurred in dogs. According to epidemiological and clinico-pathological studies the cases were tentatively diagnosed as viral enteritis and the possibility of canine parvovirus as the etiological agent for the cases was also discussed

A total of 136 dairy cows were subjected to test for bovine mastitis by AHI mastitis detector, microbiological test (MT) and California mastitis test (CMT). MT indicated that the most important causative microorganisms isolated from mastitis milk were Staphylococcus aureus (59.3%), Staphylococcus epidermidis (16.4%), Streptococcus agalactiae (12.4%) and Streptococcus uberis (4.4%). In Holstein breed, the critical threshold of electrical conductivity values of normal and mastitic milk were found to be less than 6,900 S and above, 7, 700 S, respectively. Although there was good agreement (92.0%) between AHI mastitis, the diagnostic efficiency of AHI mastitis detector (80.0%) was higher than that of CMT (74.0%) when compared with microbiological findings. In addition, handiness and objectivity of AHI mastitis detector for the detection of mastitic milk suggested that this could effectively be used for the diagnosis of both clinical and subclinical bovine mastitis in field

This experiment was conducted to compare six serological tests for diagnosing bovine brucellosis standard plate agglutination test (SPT), standard tube agglutination test (STT), complement fixation test (CFT), Rivanol test (RT), agar gel precipitation test (AGP) and counter immunoelectrophoresis (CIEP) in using 38 sera from brucella reactors and 222 sera from cattle. The SPT gave 1.6% apparent false negative reactions and 15.4% apparent false positive reactions when compared with STT which is an official test for bovine brucellosis in this country. The distribution of antibody titers determined by STT showed that 37.5% of 38 reactors had antibody titers of 400 or higher. When 38 reactors judged by STT were tested by CFT and RT, 32 cattle (82.4%) were positive by CFT and 33 catlle (86.8%) were positive by RT respectivily. This results suggest that Rt is comparable to CFT in the diagnosis of bovine brucellosis. The results also indicated that both AGP and CIEP were insensitive to detect brucella infection in cattle

This experiment was done to estimate the blood urea nitrogen and serum creatinine concentrations in renal dysfunction which was experimentally induced with reduction in renal mass in dogs. During the experiment, blood urea nitrogen and serum creatinine concentrations showed no variance in dogs with 50% reductions in renal mass, but these values were remarkably increased in dogs with 75% reductions in renal mass. It was considered that 755 reductions in renal mass was applicable as experimental models for renal dysfunction