PREVENTION OF OVINE LUPINOSIS BY THE ORAL ADMINISTRATION OF ZINC SULPHATE AND THE EFFECT OF SUCH THERAPY ON LIVER AND PANCREAS ZINC AND LIVER COPPER

Three experiments were carried out using Merino wethers to investigate if oral administration of zinc sulphate would provide protection against the liver damage that occurs in lupinosis. At the same time, the effect of this zinc therapy on liver and pancreas zinc, and liver copper concentrations, was studied.
The zinc therapy caused increases in liver and pancreas zinc concentrations, and a drop in the liver copper concentration. Adminstration of the toxins of Phomopsis leptostromiformis with the zinc increased the magnitude of these changes.
Administration of 0.5 g zinc or greater per day, as zinc sulphate, reduced the liver damage caused by the toxins of P. leptostromiformis. The degree of liver protection provided by the zinc therapy varied both between animals within treatments and between treatments in different experiments. Zinc toxicity was encountered.     

AN INVESTIGATION OF THE REMOVAL OF COARSE PLANT MATERIAL FROM LUPIN STUBBLE PADDOCKS FOR THE CONTROL OF OVINE LUPINOSIS

SUMMARY The removal of course lupin material from lupin stubble paddocks did not reduce the incidence or severity of liver damage caused by the toxins of Phomopsis leptostromiformis. Furthermore, sheep grazing paddocks from which the coarse lupin material had been removed showed body weight changes no different to sheep grazing normal lupin stubbles. In addition, it was found that 6-month-old wethers suffered more severe liver damage than 18-month-old withers, and that lupin material in the paddock remained toxic for a least 6 weeks.     

羊体的三种线虫在不同温湿度条件下从卵到侵袭性幼虫发育能力的观察

对寄生于羊的捻转血矛线虫、粗纹食道口线虫、环纹奥斯特线虫在不同恒温和恒湿条件下从卵发育到侵袭性幼虫的育成率和所需时间作了观察，温度有４０、３７．５、３５、３０、２５、２０、１５、１０、７．５和５℃等１０个段，相对湿度有１００、９０、８５、８０、７５％等５个相。结果捻转血矛线虫仅在１０～３５℃温度和８０％以上相对湿度条件下能完成发育，１００％相对湿度和２０℃条件下育成率最高；粗纹食道口线虫和环纹奥斯特线虫在７．５～３７．５℃和相对湿度８０％以上能完成发育，也是在１００％湿度和２０℃条件下育成率最高。试验结果可供研究这些寄生虫的地理分布和制定其防治措施时作依据。     

DISEASE AND INJURY IN THE SOUTHERN ELEPHANT SEAL

Disease and injury was recorded in 170 tagged southern elephant seals (Mirounga leonina) on the Antarctic continent. Trauma due to interspecific predation was the most common disorder. No small seals were observed with lesions attributable to this in the Antarctic population. This finding differs from data recorded in a sub-Antarctic (Macquarie Island) population where seals of all class sizes exhibit lesions due to interspecific trauma. No external parasites were observed in the Antarctic population.     

COMPUTED TOMOGRAPHIC FINDINGS IN OVINE COENUROSIS

Computed tomographic imaging was conducted in twenty ewes with cerebral coenurosis. CT imaging allowed precise evaluation of the size and location of the cyst, which appeared as a hypoattenuating structure with a mass effect. No meaningful correlation between clinical signs and the location of parasitic cyst was detected.     

甘肃省部分牛羊血液原虫传播媒介的实验研究

利用蜱传播试验,确定了甘肃省一些牛羊血液原虫的媒介和传播方式。甘肃省牛的双芽巴贝斯虫媒介为微小牛蜱。大巴贝斯虫媒介为长角血蜱。瑟氏泰 勒虫媒介为长角血蜱;绵羊无浆体的媒介为草原革蜱。微小牛蜱、长角血蜱可分别传播双芽巴贝斯虫和大巴贝斯虫,传播方式为经卵传递。将采集于甘肃文县牛体上的微小牛蜱和两当县的长角血蜱饱血雌虫孵育而来的次代幼虫分别叮咬除脾牛体后,２头牛各自感染双芽巴贝斯虫或大巴贝斯虫。将采自崇     

IOHEXOL PLASMA CLEARANCE IN HEALTHY DOGS AND CATS

Iohexol plasma clearance as a measure of glomerular filtration was determined in 31 dogs and 19 cats after an intravenous (i.v.) bolus injection. All animals were healthy and privately owned. Serial blood samples were taken before and up to 4 h after tracer injection. Iohexol plasma concentration was determined using X-ray fluorescence. A plasma tracer elimination curve was generated and clearance was calculated by dividing the injected dose by the area under the curve estimated using a two-compartment pharmacological model. Clearance was normalized to body weight (BW), body surface area (BSA), and extracellular fluid volume (ECFV). Mean, SD, and coefficient of variation of plasma clearance, before and after normalization, were calculated. Linear regression analyses were performed between body size and normalized plasma clearances. No significant linear relation was found between BSA and clearance normalized to BSA in dogs, and between BSA, BW, ECFV and clearance normalized to BSA, BW, and ECFV in cats. The optimal method for normalization of iohexol plasma clearance in dogs was by using BSA. In cats, all three methods tested were considered satisfactory. Normalization to BSA appears to be superior to normalization to BW and ECFV in dogs, and can be recommended for clinical use.     

绵羊胚胎移植技术在内蒙古的研究和应用

家畜胚胎移植技术是家畜繁殖学领域一项高新生物技术。从１９９１年至１９９６年,对９个品种４０８只供体羊超数排卵处理,获Ａ、Ｂ级胚胎４００２枚,平均９．８１±４．６４枚。移植受体３１２９只,历年移植妊娠率平均达７４．０２％,产羔率达６１．９７％。同时,得出以下研究结果,１．在内蒙古的羊胚胎移植技术的最佳季节是１０月中旬至１１月下旬。２．采用ＦＳＨ－ＬＨ和ＦＳＨ－ＣＬ－ＬＨ（ＣＩ－氯前列烯醇）法对发情周     

SCROTAL ABNORMALITIES IN RAMS IN TROPICAL QUEENSLAND WITH PARTICULAR REFERENCE TO OVINE BRUCELLOSIS AND ITS CONTROL

Clinical conditions affecting the reproductive organs were found affecting 17.2% of 2,332 rams. The following conditions were found: epididytimis 69.4%, atrophy 15.4%, varicocoele 9.5%, hernia 2.9%, cryptorchidism 1.2%, and hydrocoele 1.5%. The incidence of Brucella ovis antibodies as determined by the CF test in 2,332 rams from 12 flocks in north western Queensland was found to be 18.3%.
The age distribution of ovine brucellosis among 1,772 rams whose ages were known was as follows: 1 year 2.1%, 2 years 10.4%, 3 years 15.9%, 4–7 years 21.8%, and over 7 years 24.4%. The age incidence of all the various clinical conditions as they affected the 1,772 rams was: 1 year 3.6%, 2 years 8.4%, 3 years 13.1%, 4–7 years 28.4%, and over 7 years 27.9%.
Control of brucellosis in two flocks is reported and a possible means of control of this disease in Queensland is discussed.     

THE ROLE OF THE TASMANIAN DEVIL IN THE EPIZOOTIOLOGY OF OVINE CYSTICERCOSIS AND ECHINOCOCCOSIS

Tasmanian devils were fed infective cystic material of Taenia ovis, T. hydatigena and Echinococcus granulosus and later killed and examined for adult tapeworms. No infections with T. ovis were found after feeding 23 cysts to 8 devils. T. hydatigena were recovered from 5 to 41 devils and 10 worms established after feeding 417 cysticerci. No E. granulosus were recovered from any of 3 devils. Specimens of T. hydatigena appeared to develop as well in devils as in dogs. From these and previous results devils could be successful hosts to T. hydatigena and T. ovis. A survey of 320 devils failed to detect any natural infections with any of these 3 species.