牛环形泰勒虫病的防治

新疆呼图壁种牛场奶业公司是以养奶牛为主的畜牧场 ,1999年年底存栏黑白花牛 142 2头 ,其中生产母牛 879头 ,黑白花母牛平均年单产 75 0 0ｋｇ以上 ,牛群质量、奶牛平均年单产在全国名列前茅。但牛泰勒虫病在历史上曾给该场养牛业造成过较大的威胁 ,多年来经过全场兽医人员不懈努力和上级科研单位协助取得了一定的成效和防治经验 ,该病现已基本控制。1　流行情况呼图壁种牛场总面积约为 15 0ｋｍ2 ,解放前误认为是炭疽疫区 ,后经确诊为焦虫病区。 195 5年建场以来 ,陆续从培城、乌鲁木齐市南山 ,昭苏调进土杂种牛 ,以后又引进了阿拉托夫 ,西…     

用牛环形泰勒虫裂殖体胶冻细胞苗防制牛泰勒虫病

牛泰勒虫病在我省流行已久,主要用药物治疗。1972—1976年,中国农科院兰州兽研所和宁夏兽研所共同研制成功牛环形泰勒虫裂殖体胶冻细胞苗(以下简称细胞苗),经试验,免疫效果可靠,较好地解决了该病的免疫     

牛环形泰勒虫病的诊治

1993年7月份，我县有两个村先后发现牛环形泰勒虫病，经综合诊治，病情得到控制。l流行情况：据资料记载，我县小作镇于1982年从尚义县购进53头草原红杂交牛，多为两岁左右。翌年7月月发本病，诊治不及时，全部死亡，此后呈零星散发．1993年7月5日和17日，我县北孤台村集体牛场     

牛环形泰勒虫病的诊断及防治

曲靖市麒麟区西山奶牛场寄养于郎目山的后备奶牛 4 0头于 2 0 0 1年 7月 19日至 2 0 0 1年 7月 2 5日全部发病 ,死亡 5头 ,致死率为 12 5 %。经流行病学、临床症状、病理剖检及实验室检验诊断为牛环形泰勒虫病。1　临床症状消瘦 ,呼吸困难 ,眼结膜苍白 ,流泪 ,视力减退 ,有的眼角膜变为灰色 ,体温 39 5～ 4 1 3℃ ,为稽留热。鼻镜干燥 ,鼻孔流出清白粘液 ,流清口水。肌肉震颤 ,垂头耷耳 ,肷下陷 ,弓腰缩腹 ,精神萎顿 ,食欲减少或废绝 ,体表淋巴结肿大 ,压迫有痛感。血液稀薄呈淡红色。检查牛体 ,发现有硬蜱。2　病理剖检胸腹两侧皮下有很多…     

3种处方治疗吐鲁番地区牛环形泰勒虫病效果的对比

采用临床症状观察、病原学检查和PCR检测等方法确诊了60例牛环形泰勒虫病病例。将60头阳性牛随机分为4个组,即处方1组、处方2组、处方3组以及对照组,在治疗第1、2、3、4、5和7天,分别对每组患牛进行临床症状观察、体温测定、血涂片观察、染虫率统计及治疗效果观察。结果:处方1组治愈率为93.33%(14/15),高于处方2组(86.67%)及处方3组(73.33%),处方1组与处方3组复发率为0%(0/15),低于处方2组(15.38%);方差分析结果显示对照组与各处方组染虫率差异显著(P0.05),处方1组、处方2组分别与处方3组染虫率差异显著(P0.05),处方1组与处方2组差异不显著(P0.05)。本试验发现处方1组是3种处方中治疗牛环形泰勒虫病的最佳处方,以上治疗数据可为我区牛环形泰勒虫病的防治奠定基础。     

虫草试验性治疗牛环形泰勒虫病的报告

虫草试验性治疗牛环形泰勒虫病的报告张深固，赵振升，赵崇民，宋文成（洛阳农业高等专科学校牧医系，河南洛阳４７１８００）环形泰勒虫（Ｔｈｅｉｌｅｒｉａａｎｎｕｌａｔａ）与疟原虫有相仿的生活史［１，２］，鉴于虫草有与氯喹相近的抗疟活性［３］，而进行了本研究...     

群牛暴发牛泰勒虫病的诊治

牛泰勒虫病在南方地区较为罕见。2001年7月，湖南省衡阳县樟树乡某村牛场所养的93头牛暴发牛泰勒虫病，经笔者诊治及时控制了疫情，现报告如下：     

Chemotherapeutic value of parvaquone and buparvaquone against Theileria annulata infection of cattle

Parvaquone (BW993C), 2-cyclohexyl-3-hydroxy-1,4-naphthoquinone, and buparvaquone (BW720C) 2-(trans-4-t-butylcyclohexyl-methyl)-3-hydroxy-1,4-naphthoquinone, were evaluated to determine their therapeutic efficacy in the treatment of theileriosis caused by Theileria annulata infection in cattle in Iran. One hundred and fifty-nine pure and crossbred Bos taurus cattle, experimentally or naturally infected with T annulata, were treated. Parvaquone was injected into 86 animals with up to three doses of 20 mg kg-1 or 10 mg kg-1 at intervals of 48 hours between doses. Buparvaquone was injected into 73 animals. Up to three doses of 2.5 mg kg-1 were injected with an interval of 48 hours between doses. The recovery rate of animals treated with parvaquone was 60.7 per cent and with buparvaquone it was 88.7 per cent. No significant side effects of relapse of disease were observed following the use of either compound. It is concluded that buparvaquone at a dose of 2.5 mg kg-1 has a satisfactory therapeutic index and is a more effective treatment of T annulata infection than parvaquone. The prophylactic use of schizont tissue culture vaccine and chemotherapy with buparvaquone could be the most promising means of controlling theileriosis in Iran.     

Changes in blood chemical components during experimentally induced Theileria annulata infections in cattle

During the course of infection of calves with Theileria annulata levels of glucose, calcium, proteins, phosphorus, magnesium and potassium decreased and those of bilirubin, cholesterol and alkaline phosphatase increased with no changes in sodium and acid phosphatase levels. Several of these biochemical alterations have been explained in relation to the injury to the liver and other organs.     

Treatment of Theileria annulata infection in calves with parvaquone

Fifteen calves were infected by the injection of stabilate of a suspension of Hyalomma anatolicum anatolicum ticks infected with the Ankara strain of Theileria annulata. Three were kept untreated, as controls, and they all died of theileriosis. Three groups of four calves were treated intramuscularly with parvaquone (Clexon; Wellcome) when early signs of theileriosis were clinically apparent. One group received 20 mg (kg bodyweight)-1 of parvaquone 10 days after infection. Two of these calves were clinically cured and two died of theileriosis. The remaining two groups of four calves received two doses of parvaquone, each of 10 mg (kg bodyweight)-1, either on days 10 and 11 or days 10 and 12. Three calves in each group were clinically cured while one in each group died of theileriosis. Total parasitological cure was not achieved in any of the calves. No symptoms of toxicity due to parvaquone treatment were observed.     

Efficacy of parvaquone and long-acting oxytetracycline in Theileria annulata infection

Therapeutic and prophylactic efficacies of parvaquone and long-acting oxytetracycline were tested against Theileria annulata infection, induced by injecting a suspension of infected ground tick tissues (GUTS) into groups of 4 or 5 calves. This infection killed two of four control calves, while all the animals given a single intramuscular dose of 20 mg kg-1 parvaquone or long-acting oxytetracycline on the day of infection underwent mild reactions and recovered. Two separate doses of parvaquone of 10 mg kg-1 administered on the first and second days of fever protected four out of five calves. All the recovered animals from both treated and control groups resisted a homologous challenge with GUTS on Day 45 post-infection which killed three out of four susceptible unimmunized control calves.