Isolation and identification of mycoplasma were performed to clarify mycoplasma infection of mice fed by convectional feeding at two (K1, K2) institutes in Korea. The twenty mice to be tested were randomly samples from each of 10 breeding colonies in respective institute. Identification of the mycoplasma strains isolated from the nasal cavity, lung and synovia of mice was made according to the morphology of colonies, biological and biochemical properties with special reference to M. pulmonis, M. arthritidis and M. neurolyticum

The arterial supply to the eyeball of the Korean native goat has been described. Observations were made by dissection of ten Korean native goats fixed in embalming fluid and injected with neoprene latex. The eyeball and accessory ocular organ of the Korean native goat received its blood supply chiefly from the A. ophthalmica externa and partly from the branches of A. temporalis superficialis and A. malaris. A. ophthalmica externa formed Rete mirabile ophthalmicum after giving off Ramus muscularis and A. lacrimalis, and continued to A. supraorbitalis

Reduced egg production with depigmented, chalky deposit, wrinkled and malformed eggs was observed in breeder flocks throughout the country. The disease was identified as Infectious Bronchitis based on serological findings and virus isolation

Progesterone immunogen has been synthesized and its melting point, Rf-value, UV and IR spectrum have been measured to develop the essential step in antisera production against low molecular weight substance. Mixed anhydrid reaction was used to conjugate 11 alpha-hydroxy-progesterone with succinic anhydride. Melting point of one intermediate compound was 156 deg C, and Rf-value was 0.41 in benzene: acetone: methanol (5:5:2).

This paper described the distribution and transmissibility of BLV (bovine leukemia virus), the relationship between antibodies against BLV and lymphocyte count in 313 dairy cattle from 36 herds, the clinical signs and hematological findings of 2 lymphosarcomatous cattle in the northern area of Kyongbuk. Eighty three (26.5%) of 313 cattle from 36 herds were positive for BLV antibodies and 19 (52.8%) of 36 herds were infected with BLV by the immunodiffusion test with BLV-gp antigen. The rate of BLV infection in cattle varied from 9.5 to 87.5% in 19 positive herds, it was higher in herds pastured during summer and included lymphosarcomatous onset than the other and also higher with the age

In order to clarify the pathogenesis of perirenal edema, pigs and rabbits were administered with oxalate and nitrate, with oxalate nitrate and glycolic acid, with oxalate, nitrate and ascorbic acid and with oxalate, nitrate and calcium, respectively. The pigs and rabbits administered with oxalate and nitrate with oxalate, nitrate and glycolic acid and with oxalate, nitrate and ascorbic acid, respectively, were not showed perirenal edema despite of observing the abundant oxalate crystals in the proximal convoluted tubles

This paper deals with the isolation of Salmonella on 3 herds during the period from May 1984 to May 1985. Isolated Salmonella were examined for serotypes, adhesive fimbriae, antibiotic susceptibility and detection of R plasmid. Of total 1505 cattle, 24 Salmonella were isolated from 18 cattle (1.2%) and their serotypes were S. enteritidis (9 strains), S. derby (4 strains), S. infantis (1 strain), C1 group (8 strains), C2 group (1 strain) and untypable (1 strain). Twelve strains of Salmonella were isolated from 227 cattle with diarrhea and their serotypes were S. enteritidis (4 strains), S. derby (3 strains), S. infantis (1 strain), C1 group (3 strains) and untypable (1 strain)

The prevalence of antibody to Getah virus was serologically followed among those horses in Korea. Blood samples were taken from 575 horses in Feb and 462 horses in Sep. 1985. Overall percentage of horses with seropositive to Getah virus was 37% in Feb and 47% in Sep. The data suggest that the Getah virus infection was endemic in Korea and the increase in prevalence may be associated with the seasonal activity of arthropod vectors. This entails preventive precautions of the horses against this viral infection before the entry into Korea