首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
A total of 1276 cattle from 76 farms in 8 villages were examined by palpation of the skin for evidence of hypodermosis. The effects of age, sex, breed, and colour of cattle on hypodermosis were investigated. The overall prevalence was 31.9%. The mean number of warble fly larvae on infested animals was 8.46. Hypodermosis infestations were encountered in all the villages visited. Within a herd, the intensity of infestion decreased with the age of cattle. Infestation rates of warble fly larvae were lower in native cattle, in females, and in piebald animals.  相似文献   

3.
4.
含野血牦犊牛,家牦犊牛增重效果观察   总被引:1,自引:0,他引:1  
1994-1996年在海南州赛什牧场对采用野牦牛冻精人工授精和1/2野血公牛本交两种方法配家牦母牛产生的1/2野血牦犊牛35头和1/4野血牦犊牛48头,跟踪定量观测。结果:1/2野血牦犊牛和1/4野血牦犊牛的平均初生重分别比家牦犊提高了7.65%,8.86%,平均18月龄重分别比家牦犊牛提高47.16%,17.22%。  相似文献   

5.
Tropical Animal Health and Production - Fifteen apparently healthy Kandari cross-bred cattle aged about 4 years were purchased from Rurki, Patiala district of Punjab by a private dairy...  相似文献   

6.
7.
For decades, about 30% of the young cattle in the Steinfurt district of the North German Basin were infested with Hypoderma bovis. Compulsory treatment with rotenone between 1934 and 1963 failed to control infestation. When systemic organophosphorous insecticides became available a 3-year scheme was instituted in which all the 6–24-month-old cattle were treated annually, between 15 November and 15 December, with trichlorfon spot-on.At first, the treatment was not compulsory and warble infestation was occasionally found in cattle purchased outside the district. Later, the treatment was made compulsory and since 1966 warble infestation has not been detected in the district.  相似文献   

8.
Mycoplasmas were isolated from yak calves in Mongolia, the 1st experience worldwide with this species. They were also isolated from pathologically affected sheep and goat lambs. The disease was experimentally reproduced in yak calves as well as in sheep and goat lambs. Clinical manifestations were identical with those recordable from animals with spontaneous outbreak of the disease. This had been for the 1 time ever that a therapy was tested on animals with mycoplasmosis, using water with addition of oligodynamic silver. Something between 95 and 100% of all patients were clinically cured. The experimental vaccine involved was found to offer protection against mycoplasmosis to sheep and goat lambs. Damage association with mycoplasmosis was found to occur 1st in liver, spleen, and lymph nodes and to be subsequently proliferated to lung and other organs. Respiratory mycoplasmosis is the common definition used at present but is not in conformity with the pathological processes involved, as the major role is played by liver damage. Mycoplasmosis in these 3 species, therefore, should better be named mycoplasmosis bovi hepatica.  相似文献   

9.
2008年10月中旬采用阿维菌素泼背剂对462头牦牛,分为两组进行牛皮蝇蛆病防治试验,并于2009年4月进行了防治效果考核,结果显示:试验组牦牛感染率为零,防治效果达100%;对照组166头牦牛中感染97头,感染率58.43%.平均感染强度6.70个瘤疱.  相似文献   

10.
11.
西藏林芝地区种畜场牦牛寄生虫区系调查   总被引:1,自引:0,他引:1  
西藏高原是我国牦牛分布最广的地区之一 ,占全国牦牛数量的 90 %以上 ,其中林芝地区是藏东南山地牦牛集中产区 ,海拔在 2 1 0 0~ 50 0 0 m之间 ,草场主要是高山草甸、山地草甸和高山灌丛草场 ,本区气候温和湿润 ,雨量充沛 ,年平均气温 7~ 9℃ ,相对湿度 6 0 %~ 70 %。林芝地区种畜场位于海拔 40 0 0 m左右鲁郎县。牦牛在西藏林芝地区畜牧业生产中具有独特的经济地位 ,近年来 ,该地区牦牛生产性能、繁殖性能以及抗病力逐渐下降 ,为了搞清其原因 ,我们首次对林芝地区种畜场牦牛进行了寄生虫种类、分布、流行规律和危害情况的调查 ,并提出了…  相似文献   

12.
13.
14.
Postnatal persistence of foetal haemoglobin in yaks   总被引:2,自引:0,他引:2  
  相似文献   

15.
2009年10月中旬采用阿维菌素泼背剂对574头牦牛,分为两组进行牛皮蝇蛆防治试验,并于2010年4月进行了防治效果考核,结果显示:试验组牦牛感染率为零,防治效果达100%;对照组119头牦牛中感染92头,感染率77.31%,平均感染强度10.89个瘤疱。  相似文献   

16.
采用阿维菌素泼背剂对306头幼年牦牛进行牛皮蝇病的防治,并于2007年4月进行了防治效果的考察,结果防治群感染率为阴性,而对照群的感染率为99.33%,感染强度4.77个瘤包/牛。  相似文献   

17.
Ovarian morphology and follicular systems in yaks of different ages   总被引:5,自引:0,他引:5  
Forty-five female yaks of different ages with known reproductive histories were used to determine the morphology and follicular systems of their ovaries. The histological structure of the ovaries in each age group was found to be similar and resembled that of cattle and buffalo. The atresia of primordial follicles took one form (oocyte atresia); that of growing follicles could be divided into two stages (early and late); and that of Graafian follicular were classified as early, definite and late stage. The details of the several types of atresia are described herein. The average total numbers of primordial follicles per ovary pair in 1-month-old calves, 1-year-old heifers, 2-year-old heifers and 7-10-year-old cows were 53,500 +/- 6300, 32,870 +/- 4500, 22,850 +/- 2800 and 9500 +/- 1200, respectively; those of growing follicles were 210 +/- 76, 815 +/- 95, 895 +/- 142 and 445 +/- 88, respectively; and those of Graafian follicles were 36.5 +/- 14.2, 41.7 +/- 12.3, 37.8 +/- 9.8 and 42.5 +/- 14.5, respectively. The percentage of atretic primordial follicles per ovary pair in 1-month-old calves, 1-year-old heifers, 2-year-old heifers and 7 to 10 year-old cows were 51.6, 55.5, 56.7 and 47.4%, respectively. The average total numbers of atretic growing follicles per ovary pair were 119.5 +/- 21.5, 605.5 +/- 74.3, 721.6 +/- 78.5 and 275.8 +/- 66.3, respectively; those of atretic Graafian follicles were 22.1 +/- 5.6, 21.2 +/- 7.6, 21.5 +/- 4.7 and 25.3 +/- 6.7, respectively.  相似文献   

18.
19.
The clinical signs of a disorder in yaks (Bos grunniens), known locally as "swayback ailment," in the Qing Hai-Tibetan Plateau are described. The purpose of this study is to investigate the possibility that swayback ailment is iron (Fe)-induced copper (Cu) deficiency. The mean concentrations of Cu in soil and forage from affected areas and unaffected areas are similar and within the normal ranges. The mean concentrations of Cu in blood and hair from the affected yaks was significantly lower (P < 0.01) than that in unaffected yaks. The mean concentrations of Fe in soil and forage were significantly higher (P < 0.01) in affected than in unaffected areas. Affected yaks showed a hypochromic microcytic anemia and a low level of ceruloplasmin. Oral administration of copper sulphate prevented and cured the disease. We conclude that "swayback disorder" of yaks is caused by secondary Cu deficiency, mainly due to the high Fe content in forage.  相似文献   

20.
对急性致血性死亡,怀疑为牦牛炭疽痛的病死牛的耳进行巴氏轩菌和炭疽杆菌的分离与培养鉴定,结合流行病学、临床症状和实验室捡查.诊断为炭疽杆菌和多杀性巴氏杆菌混合感染。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号