Amblyomma hebraeum, 60CO irradiation of nymphs failed to attenuate Cowdria ruminatium

Ostertagia ostertagi, beef cattle, acquisition of inhibited larvae during winter and spring, efficacy of ivermectin against inhibited early 4th-stage larvae of O. ostertagi and other nematodes of abomasum and intestinal tract: Louisiana

Schistosoma edwardiense recovered from hippopotamus, measurements of adults and eggs, species validity, determined to be hippopotamus-specific based on examination of game droppings for schistosome eggs and on lack of experimental establishment in rodents, Biomphalaria salinarum believed to be intermediate host based on evidence from experimental exposure; S. hippopotami suggested to be synonymous with S. mansoni

In order to know the morphology and the function of the fat-storing cells (FSC) of the squirrels which were captured at the Pal-Gong mountain near Taegu, Korea [R.] in December, 1980 (Group A) and May, 1981 (Group B), respectively, light and electron microscopic observations were conducted on the liver of the squirrels. Light microscopically, the size of the lipid droplets in the FSC of group A was uniformly larger than those in the cells of group B, and number of the droplets in the FSC of group A was less than those in the cells of Group B. The distribution of the FSC of group A was mainly perilobular area while those of group B were centrolobular and midzonal areas. In this method, the FSC of the squirrels was similar to those cells of the hamsters. Electron microscopically, general morphology of the squirrel's FSC was accorded with those of the other mammals. However, the rough surfaced endoplasmic reticulum in the FSC of group B was more dilated than those in the cells of group A, and more lipid droplets and pinocytotic vesicles were observed in the FSC of group B than those in the cells of group A. From those evidences, it could be suggested that the metabolic rates in the FSC of the squirrels collected in the spring were higher than those in the cells of the animals collected in the winter.

This study was performed to evaluate the sedative effect of xylazine for restraint of deers such as sika deer (19 cases), deer (19 cases), elk (19 cases), pere david deer (13 cases) and reindeer (8 cases), raised in the area of suburb of Seoul, Chungcheongnam-do and Gyungsangbug-do. Provinces, Korea [R.]. The more the dose of xylazine, the earlier the onset of sedation, and the slower the recovery time to normal state. The optimal intramuscular dose of xylazine was found to be 0.8-1.4 mg per Kg of body weight for sika deer, 0.6-1.0 mg for red deer, 1.0-1.4 mg for elk, 0.2-0.4 mg for pere david deer, and 0.6-1.0 mg for reindeer.

The morphological and structural studies of Anisakinae larva has been carried out. The larva was collected from naturally infested eleven swine and from marine fishes, Somber joponicus. Anisakis larva found in the stomach wall and on the surface of mucosa were more or less degenerated. The reports on natural infestation of domestic animal with Anisakis type I larvae were two swine cases in Korea and Japan respectively. On the other hand two human cases of the larva were reported in Korea and more than one thousand cases in Japan. In Taiwan no reports of human and domestic animal cases could be found.

Changes in serum glutamic oxaloacetic transaminase (S-GOT) activities, serum alkaline phosphatase activities and serum total protein amounts were investigated on seven Korean native cows having normal estrus cycle of 18-24 days after normal parturition, dividing estrus cycle into estrus (0-1 days), metestrus (2-6 days), diestrus (7-16 days), proestrus (17-20 days). Serum total protein amount at estrus ranged from 6.45 to 8.08/10O dl with a mean of 7.25 +-0. 56g/100 dl, at metestrus 6.37 to 7.9 g/100 dl with a mean of 7.65+-0 0.50 g/100 dl, at diestrus, 6.56 to 8.67 g/100 dl, with a mean of 7.53+-0.55 g/100 dl and at proestrus 5.94 to 7.71 g/100 dl with a mean of 6.54+-0.65 g/dl. There was no significance among the stages of estrus cycle.

A series of experiments was designed and carried out to assess the variation of feeding performance of the adult female ticks of Haemaphysalis longicornis in the primary and repeated feeding trials on the same experimental host rabbit under laboratory conditions. It was concluded that an acquired immunity was indeed developed, that the feeding performance was reduced by repeated feeding of the ticks on the same host, and that it was not true economy to use a rabbit more than twice for the colonization of the tick H. longicornis.

An investigation on various causes of milking disturbances resulting from injuries and abnormalities of mammary system were made on 2,179 Holstein cows. To perform this investigation, 69 dairy farms of the suburban area of Seoul city, Gyeonggi-do and Chungnam provinces were randomly selected and subjected. Diagnosis was made by means of inspection and palpation of teat, insertion of teat canula, checking milk machines, anamneses and farm records. Dry off quarters were found in 158 quarters which turned out to be 1.8% of 8,716 quarters inspected. Among them 53.59% had one, 43.72% had two, 2.47% had three, and 0.22% had four supernumerary teats, respectively. Teat sphincter stenosis was 1.76% of 8.716 teats, loose sphincter was 0.89% of 8.716 teats and injured teat tip caused by over milking of milk machine was 2.63% of 8.716 teats.