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

Biochemical and antimicrobial susceptibility tests were conducted on 40 strains of Pseudomonas aeruginosa which originated from diseased chicken. An extensive study of the biochemical properties revealed that the tested strains can be identified with Pseudomonas aeruginosa. Antibiogram showed that all the strains were susceptible to gentamicin, colistin and amikacin but resistant to nitrofurantion, trimethoprim plus sulfamerthoxasole, ampicillin, methicillin and kanamycin and had varying degrees of resistance to other antimicrobials including carbenicillin, sulfomamides, neomycin, streptomycin, tetracycline and chloramphenicol. Three of the most frequent resistance patterns observed were FM (Nitrofurantoin) SXT (Sulfamethoxasole) AM (Ampicillin) ME (Methicillin) KM (Kanamycin) CM (Chloramphenicol) TC (Tetracycline) SM (Streptomycine) NE (Neomycine) SSS Pattern, FM SXT AM ME KM CM TC SM NE SSS CB (Carbenicillin) Pattern and FM SXT AM ME KM CM TC SM Pattern, and these resistance patterns contained 72.5% of the tested strains

This study was done to clarify the histopathological changes of pigs naturally infected with hog cholera. Microscopic observations of the necrotic lesion and inclusion body in the lymphoid organs were carried out in the natural cases of hog cholera and experimental cases inoculated with ALD (challenge) virus and isolated virus strains. Electron microscopic findings of the intranuclear inclusion bodies in the retincular cell of spleen and lymph node were also observed in the experimental cases. The histological findings of necrosis of lymphoid organs were found to contain 35.0% in the natural and 37.5% in the experimental cases. Intranuclear inclusion bodies were found mainly in the reticular cells of lymhoid organ, the epithelium of bronchiole and alevolus, and the vascular endothelium of brain. These inclusion bodies were seen in 40.0% of the natural cases and in all of the experiment cases. The inclusion body appeared to be composed of activated nucleoli and chromatin granuls (interchromatin and perichromatin) by electron microscopy

A seroepidemiological survey on bovine leucosis virus was conducted. Serological studies were analyzed by age groups and the sizes of herds. The number of reactors increased gradually with the advance in the age of cattle and the herd size. The highest rate of BIV carriers was found in the ages between 6 and 8 years, and in the size of herds with 20 to 50 heads. Two out of 6 specimens (33.3%) from the reactors showed the typical type C virus with the size of 90 to 110 nm around microvilli and in intracytoplasmic vacuoles

A seroepidemiological survey for antibodies to bovine leukemia virus in dairy and Korean native cattle in Kyungbuk area, Korea [R.] was performed using BLV p and gp antigens by the ID test. In the dairy cattle (Holstein), thirty of 106 sera (28.3%) form 14 dairy farms were positive for BLV antibodies and 12 of 14 pastures were contaminated with BLV. In the Korean native cattle, seventeen (2.4%) of 699 sera from the slaughter house in Taegu city were positive for BLV antibodies. Of 47 gp-ID positive cattle, 5(10.6%) had antibodies to p antigen