Nickel toxicity and interactions of nickel with zinc, copper and lead were studied in growing chicks fed supplement diet. Feed intake and growth rate of the chick were reduced by 250 mg nickel as a sulfate salt per kg of feed. The toxicity of nickel was decreased by zinc or copper supplementation, but not lead. High nickel feed increased nickel level in kidney and decreased zinc levels in tibia and plasma. However, low zinc levels in tibia and in plasma were reversed by zinc supplementation. Hemoglobin, packed cell volume, and aortic elastin content were increased in chicks fed nickel

This paper dealt with the distribution of normal mast cells in the spleen, liver and lung on cattle, horses, pigs and dogs, and also degranulation of mast cells in the dogs injected with Rompun (2% Xylazine HCl). Normal mast cells were distributed in spleen, liver and lung on cattle, horse, pig and dog. Mast cells were observed in both red pulp and surroundings of white pulp of the spleen in horse, in the white pulp of the spleen in cattle, in the trabeculae of the spleen in pigs, and in white pulp and red pulp of the spleen in dogs

Effects of binary ethylenimine (BEI) treatment on the inactivation of infectivity and hemagglutinin of Newcastle disease virus (NDV) were studied in comparison with those of formalin treatment. Immune responses of chickens vaccinated with BEI- inactivated NDV vaccines were also investigated. Complete loss of infectivity of NDV (BI) was observed at 3, 7, and 24 hrs after the treatment at 37 deg C with BEI concentrations of 0.01M, 0.005M and 0.001M, respectively

Salmonella pullorum strain W was serially passaged on the brain heart infusion agar containing acridine orange (AO) as a concentration of 100 mcg/ml. S. pullorum A060 and S. pullorum A0150, which were subcultured 60 and 150 passages on AO media, were examined for permeability barrier function of the cell wall. A060 and A0150 were appeared to be decreased in susceptibility against hydrophobic substances such as crystal violet, chloramphenicol and rifamycin, which might be resulted from the changes of permeability barrier function of the cell

The present studies were conducted to determine the causative agent of dermatophytosis occurred in two pigs from a farm in Sachun, Gyeongnam province in Korea. Brownish or greyish white crusty lesions and partial loss of hairs in these lesions were observed on the trunk of the pigs but no alopecia and pruritus were observed. Direct microscopic and cultural examination were performed for the hairs and crusts from skin lesions and the causative agent was identified as Microsporum nanum

The present study has been carried out to elucidate the antiestrogenic effects of tamoxifen in uteri of immature rats. Immature female Sprague-Dawley rats were allocated into 4 groups and injected with 5 micro g of estradiol-17 beta, 50 micro g of tamoxifen, a combination of both, or vehicle only subcutaneously three times after an interval of 24 hrs respectively

Fecal samples from beef and dairy calves less than 12-month-old of Chonnam area were examined for coccidial oocysts. The percentages of cattle and coccidian species found were: Eimeria alabamensis, 9.4; E. auburnensis, 12.5; E. bovis, 29.9; E. brasiliensis, 1.5; E. bukidnonensis, 2.1; E. canadensis, 10.4; E. cylindrica, 7.5; E. ellipsoidalis, 11.5; E. pellita, 1.7; E. subspherica, 10.4; E. wyomingensis, 2.9; and E. zuernii, 22.5. Fifty five percent of the fecal samples from 521 calves were positive for oocysts, and clinical coccidiosis was not found in any of these calves. The number of species in positive samples ranged from 1 to 7

Incidence of foot disease of Korean native cattle (231 cases) and Holstein (310 cases) in slaughter house was observed from Jul to Aug, 1984. Incidence rate of foot disease was 9.09%, 12.90% and 11. 27% for Korean native cattle, Holstein and total respectively. Chronic necrotic pododermatitis showed the highest incidence among all foot disease and its incidence rate was 6.47% in all cattle observed

An outbreak of duck virus hepatitis was confirmed for the first time in Korea from ducklings having up to 40-65% mortality in less than 15-day-old ducklings of two farms located in the vicinity of Kwangju city. The infected ducks showed sudden death and opisthotonus position. The predominant gross lesions were found in the liver, showing enlargement and petechial or ecchymotic hemorrhages. The microscopic findings consisted of fatty changes and necrosis of the hepatic cells, and proliferation of the bile duct epithelium

A total of 10 colostrum-deprived pigs (1 or 2-day-old) and 6 pigs 35-day-old), which had been raised by natural maternal nursing, were used to study the pathogenicity of the porcine enteroviruses by the intracerebral and intramuscular routes of inoculation, which the enterovirus were isolated from the diseased pigs in Korea. The porcine enteroviruses produced an identical polioencephalomyelitis in colostrum-deprived pigs and 35-day-old pigs, which manifested clinical signs and histological changes. Clinically it was characterized by incoordination, rise in rectal temperature, ataxia, flaccid paralysis in all the experimental groups