Endocrine cells were observed in the gastrointestinal tract of the squirrels by light microscopy using Grimelius and Masson-Hamperl silver impregnation, and in the stomach and duodenum by electron microscopy. Light microscopically, argyrophil cell decreased gradually in number in the pyloric region and ileum, stomach, duodenum and jejunum and rectum in the order listed. Argentaffin cells were moderately distributed in the stomach, pyloric region and duodenum, while absent in the jejunum, ileum and rectum

This survey was conducted to investigate the prevalence of the internal parasites of Holstein cattle rearing in western Kyongnam including Chinyang, Sachun, Namhae, Haedong, Sanchung, Hamyang, Geochang and Hapchun Area(Gun). A total of eight hundred and twenty five heads of Holstein cattle was randomly selected for the faecal examinations and the internal parasitisms were examined by floatation method using saturated salt solution and sedimentation method using 0.5% trio-soap solution

The papillary tubercles (PTs) developed on the splenic capsule of normal Landrace pigs were collected and their histological structures were observed with light microscope. The external features of the PTs were smooth spherical or oval form protruded on the splenic capsules. On cross section of PTs, the shapes were predominantly round or elliptical single follicular form, and were often multifollicular and irregular form in some PTs

The measurement of angled erythrocyte sedimentation rate (ESR), as a replacement for perpendicular ESR, for cattle blood was scrutinized since it has been well known that perpendicular ESR in cattle was tpp slow to be adopted as an effective clinical test. Samples of blood were taken from 186 Korean native cattle over 2 years old. Average values of perpendicular ESR/24hrs in 15 apparently healthy cattle, as measured by Wintrobe, Westergren and capillary tubes, were 5.8 +- 2.2, 11.1 +- 3.7 and 10.4 +-4.5% respectively, which were found to be similar to the values of perpendicular ESR/hr of normal blood of human

An experiment was carried out to measure the cellular immune response in the animals by sensitizing the animals with 2, 4-dinitrochlorobenzene (DNCB). The fowls could be sensitized with primary application of DNCB. The sensitizing and challenge dose was standarized. Heterophils were prominent in the early inflammatory response in the superficial and deep dermal regions with scattering of eosinophils. The histological response in the fowls was characteristic of a delayed hypersensitivity reaction

Sprague-Dawley rats received subcutaneous injections of gentamicin sulfate, 50 and 100mg/kg for 3, 7 and 10 days. The hematological and blood chemical values were determined. Kidneys were examined histologically and ultrastructurally. The serum values of aspartate transaminase, blood urea nitrogen and creatinine in the rats administered gentamicin, 50 and 100mg/kg/day were significantly increased than those in the control. The ratio of kidney weight to body weight was significantly increased in the rats injected gentamicin, 100mg/kg for 10 days than those in the control

The 587 Holstein cows which calved from Jan 1983 to Dec 1984 at an integrated dairy farm in Chungnam province were examined for the incidence of reproductive disorders and their conception rate after treatment. The incidence of reproductive disorders was 47.9% (281 heads) among 587 heads which calved. As number of calvings increased, the incidence of reproductive disorders decreased. The cows which calved in spring and summer showed significantly higher incidence of reproductive disorders than those which calved in autumn and winter (p 0.05)

This paper deals with the incidence of bovine mastitis for 743 quarters and distribution of Staphylococci for the quarter and 70 bulk milk samples in the northern area of Kyongbuk during the period from Jan to Dec 1984. Isolated Staphylococci were examined for species, subgroups, antibiotic resistance and penicillinase production. A total of 25 (73.5%) of 34 herds, 102 (54.3%) of 188 cows and 208 (30.3%) of 743 quarters were found to be infected with subclinical mastitis. A total of 83 (83.1%) of 102 cows, 94 (45.2%) of 208 mastitic quarters and 55 (78.6%) of 70 bulk milk samples were isolated Staphylococci

This paper deals with the distribution, reservoir and mode of spread of salmonella infection on 7 pig farms in Taegu, Kyongbuk, Kyongnam and Chungnam and a slaughter house in Taegu during the period from May 1984 to May 1985. Isolated salmonella were examined for serotypes and biotyping of S. typhimurium. Of total 7,995 samples from 7 pig farms and a slaughter house, 319 salmonella were isolated from 234 samples (2.9%) and their serovar strains were S. derby 77, S. infantis 41, S. enteritidis 20, S. typhimurium 18, S. bredeney 16, S. london 14, S. paratyphi B 9, anatum 8, S. montevideo 8, S. senftenberg 7, S. thompson 6, S. pullorum 4, S. paratyphi A a and untypable 70

Authors evaluated retinal toxicity produced by intraocular injection of kainic acid in 10 ducks to provide further informations on the kainic acid induced retinal lesions in the avian species. By 8 hrs after injection there were severe vacuolar degenerations in the inner plexiform layer and the inner portion of the inner nuclear layer; by 24 hrs after injection many of the cells exhibited pyknotic nuclei in the inner nuclear layer; by 48 hrs after injection the reduction in the thickness was apparent in this layer because of the partial loss of the pyknotic cells. By 96 hrs there were only a few cells in the center and inner protion of the inner nuclear layer; by 10 days there was a conspicuous decrease in the thickness of the inner nuclear layer and the inner plexiform layer