花粉多糖注射剂临床前抗肿瘤药效学预试

花粉多糖对小鼠Lewis肺癌(足趾接种)模型以200mg/kg,100mg/kg,50mg/kg三个剂量iv×10qd方案给药,实验显示高、中、低三个剂量组抑瘤率分别为48.01%,43.09%,31.38%。免疫实验以上述相同的给药方案,花粉多糖对荷Lweis肺癌小鼠NK细胞活性具有明显的提高和促进作用。     

北芪五加颗粒对雏鸡新城疫疫苗免疫应答及生长发育影响

研究北芪五加颗粒对雏鸡新城疫疫苗免疫应答和生长性能的影响。选取300羽海塞克斯粉雏鸡为试验动物,随机分为5组即黄芪多糖为对照药物(200mg/b),北芪五加颗粒高、中、4G(4g/kg、2g/kg、1g/kg)3个剂量:空白对照组,饮水给药1周;对不同日龄的新城疫抗体效价、胸腺指数、法氏囊指数、脾脏指数、增重和料重比等指标进行检测。试验结果表明:北芪五加颗粒中高剂量组对雏鸡具有促进免疫器官发育、提高增重,增强新城疫疫苗免疫效果的作用。     

茯苓多糖对小鼠镇静、催眠作用的研究

[目的]观察茯苓多糖对小鼠的镇静、催眠作用。[方法]试验设空白对照组[0.2 m L/(10 g·BW·d)生理盐水灌胃]、阳性对照组[0.26 mg/(kg·BW·d)安定灌胃]、茯苓多糖低剂量组[1.90 g/(kg·BW·d)茯苓多糖灌胃]、茯苓多糖中剂量组[3.61 g/(kg·BW·d)茯苓多糖灌胃]和茯苓多糖高剂量组[5.80 g/(kg·BW·d)茯苓多糖灌胃]5个组别,对小鼠进行抗惊厥试验以及协同戊巴比妥作用试验,观察茯苓多糖对小鼠的镇静、催眠作用。[结果]高剂量[5.80 g/(kg·BW·d)]的茯苓多糖有一定抗惊厥作用,抗惊厥率是60.00%,而且能协同戊巴比妥增加小鼠的入睡时间,使小鼠睡眠持续时间增加至73.2 min左右;中剂量[3.61g/(kg·BW·d)]茯苓多糖的抗惊厥率是20.00%,协同戊巴比妥作用后使小鼠睡眠持续时间增加至63.2min左右;低剂量[1.90 g/(kg·BW·d]的茯苓多糖抗惊厥率是16.50%,协同戊巴比妥作用后使小鼠睡眠持续时间增加至55.7 min左右。空白对照组与阳性对照组的抗惊厥率、小鼠睡眠持续时间分别为0、80.00%和48.1、95.3 min左右。[结论]茯苓多糖有一定的镇静、催眠作用,且随剂量的升高其镇静和催眠作用均有增强趋势。     

樗白皮提取物对小白鼠体内黄嘌呤氧化酶活性的影响

为了研究樗白皮提取物对小白鼠机体内黄嘌呤氧化酶（XOD）活性的影响，将实验动物分为5、10、30g／kg樗白皮提取物灌喂组和正常对照组，对各组动物血清、脾、肝中XOD活性进行了测定。结果，10g／kg樗白皮提取物能够降低小白鼠血清、脾、肝组织中的XOD活性，30g／kg樗白皮提取物能提高上述各组织中的XOD活性，5g／kg樗白皮提取物组小白鼠组织中的XOD活性接近正常对照组。结果表明，不同剂量的樗白皮提取物对小白鼠体内XOD活性的作用不同，低剂量时具有抗氧化作用，高剂量时表现为促氧化作用。     

花粉降血糖作用机理探析

研究表明,花粉有降血糖作用。浙江大学动物科学院胡福良等(2003)测定和比较了茶花粉对糖尿病SD大鼠血糖的影响,试验用体重300±20g的雄性SD大鼠,禁食不禁水24小时,测空腹血糖后,尾静脉注射四氧嘧啶40m g/kg,7日后测定血糖值,选择血糖值在20m m ol/kg左右的为糖尿病大鼠,将其随机分为模型组和花粉组,每组10只;另取10只为正常对照组。实验大鼠每天早上9时和下午3时在给饲料之前按1m L/100g体重灌胃(每亳升花粉溶液含花粉0.375g),持续4周。实验结果,花粉灌胃后1周,与模型组相比血糖下降了15.28%(p<0.05);灌胃2周,血糖下降了5.76%;灌胃3周,血…     

黄芪多糖对断奶仔猪生长性能、营养物质消化率和免疫功能的影响

为研究黄芪多糖对断奶仔猪生长性能、营养物质消化率和免疫功能的影响,选择28日龄断奶、体重(12±1.04)kg的健康杜长大三元杂种仔猪48头,按体重随机分为4组,每组4个重复,每个重复3头猪。对照组饲喂基础饲粮,3个试验组分别饲喂在基础饲粮中添加0.5 g/kg、1 g/kg、2 g/kg黄芪多糖的饲粮。试验期28 d。结果表明,与对照组相比,日采食量0.5 g/kg黄芪多糖组、1 g/kg黄芪多糖组、2 g/kg黄芪多糖组分别提高0.23%(P0.05)、6.99%(P0.05)、11.62%(P0.05);料重比,0.5 g/kg黄芪多糖组降低0.59%(P0.05),1 g/kg黄芪多糖组、2 g/kg黄芪多糖组分别提高10.65%(P0.05)、14.79%(P0.05);腹泻频率,0.5 g/kg黄芪多糖组、1 g/kg黄芪多糖组、2 g/kg黄芪多糖组分别降低0.05个百分点(P0.05)、0.06个百分点(P0.05)、0.25个百分点(P0.05)。白介素-2,0.5 g/kg黄芪多糖组降低3.58%(P0.05),1 g/kg黄芪多糖组、2 g/kg黄芪多糖组分别提高41.69%(P0.05)、85.06%(P0.05);干扰素-α,0.5 g/kg黄芪多糖组、1 g/kg黄芪多糖组、2 g/kg黄芪多糖组分别提高0.26%(P0.05)、3.93%(P0.05)、10.78%(P0.05);Ig G,0.5 g/kg黄芪多糖组、1 g/kg黄芪多糖组分别提高4.51%(P0.05)、1.25%(P0.05),2 g/kg黄芪多糖组降低3.22%(P0.05)。其余指标各组差异不显著(P0.05)。综合考虑,在断奶仔猪饲粮中添加1 g/kg黄芪多糖饲喂效果为好。     

盐酸金霉素与TMP、硫酸新霉素与TMP急性毒性试验

1材料1.1试验药物盐酸金霉素、硫酸新霉素、三甲氧苄氨嘧啶(TMP)原粉,由杭州爱力迈动物药业有限公司提供。1.2试验动物大白鼠购自浙江省实验动物中心。2试验方法参照农业部《新兽药一般毒性试验技术要求》及卫生部《保健食品检验与评价技术规范》(2003.2)规定方法进行。2.1预试验2.1.1分组(1)盐酸金霉素 TMP毒性预试验:大鼠随机分组,每组3只,共5组。盐酸金霉素 TMP/kg.bw剂量分别为:7.2g 7.2g/kg.bw(A1组),3g 3g/kg.bw(A2组),0.3g 0.3g/kg.bw(A3组),0.03g 0.03g/kg.bw(A4组),0.003g 0.003g/kg.bw(A5组)。(2)硫酸新霉素 TMP毒性预试验…     

牡蛎粗多糖对免疫应激大鼠TLR-4 mRNA表达水平的影响

目的:试验目的是研究牡蛎粗多糖对脂多糖(LPS)刺激雄性大鼠产生的免疫应激是否产生缓解效果。方法:选择30只成年SD大鼠,按照体重靠近的原则,随机分成5个试验组(即空白对照组,免疫应激对照组,牡蛎粗多糖高剂量组、牡蛎粗多糖中剂量组、牡蛎粗多糖低剂量组),每组6只雄性大鼠。空白对照组和免疫应激对照组饲喂基础日粮,牡蛎粗多糖高、中、低剂量组为基础日粮添加0.9%、0.6%、0.3%牡蛎粗多糖。饲喂28 d后,免疫应激对照组、牡蛎粗多糖高、中、低剂量组按体重计算腹腔注LPS 100μg/kg,空白对照组则注射相等量的生理盐水。于注射3 h后采血,剖检取肝脏、脾脏、肾上腺、淋巴结,用RT-PCR检测TLR-4 m RNA的相对表达量。结果 :牡蛎粗多糖高剂量组、中剂量组、低剂量组和空白对照组肝脏、脾脏、肾上腺和淋巴结TLR-4 m RNA的相对表达量与应激对照组相比出现极显著性降低(P0.01),而牡蛎粗多糖中剂量组、高剂量TLR-4 m RNA的相对表达量较低剂量组更趋于生理状态下空白对照组的相对表达量。结论:LPS作为免疫原可以引起雄性大鼠产生免疫应激反应,在基础日粮中添加牡蛎粗多糖可以缓解免疫应激,且日粮中的添加量为0.6%~0.9%时,缓解效果较好。     

米尔贝肟对自然感染疥螨病犬的治疗效果

为了评价米尔贝肟对临床自然感染疥螨犬的治疗效果,选用自然感染疥螨犬65例,随机选择5条服用伊维菌素,另外60条随机分为3组,分别服用高剂量(2g/kg体重)、中剂量(1g/kg体重)、低剂量(0.5g/kg体重)的米尔贝肟。给药后2、14、28、42d和56d,刮取皮屑,检查螨虫和虫卵,同时观察临床症状。试验结束时米尔贝肟高剂量组、伊维菌素组的无螨虫犬的比例和螨虫的下降率均为100%,临床症状如红疹、结痂、过度角化等现象均消失,所有动物毛发都开始大范围重生;米尔贝肟中、低剂量组结果稍差。米尔贝肟按2g/kg体重剂量,每周1次,连续用药3周,给药对自然感染疥螨病犬有很好的治疗效果。     

黄芪多糖对断奶羔羊生长性能及免疫力的影响

文章旨在研究黄芪多糖对断奶羔羊生长性能和免疫力的影响,分析其促进羔羊生长和增强免疫力的作用。试验将健康断奶羔羊随机分为高剂量组(0.2 g/kg黄芪多糖)、中剂量组(0.1 g/kg黄芪多糖)、低剂量组(0.05 g/kg黄芪多糖)和对照组(0 g/kg黄芪多糖),连续饲喂28 d。通过测定血清生化指标、生长激素水平、平均日增重和料重比分析黄芪多糖对羔羊生长性能促进作用。通过测定羔羊淋巴细胞增殖和抗病能力分析黄芪多糖对羔羊免疫力影响。羔羊生长性能分析结果表明,试验组的血清总蛋白、白蛋白、和生长激素水平与对照组差异显著(P0.05),而谷草转氨酶差异极显著(P0.01)。高剂量组和中剂量组的血清总蛋白与低剂量组差异显著(P0.05)。各试验组生长激素水平差异不显著(P0.05),但均与对照组差异显著(P0.05)。羔羊免疫力分析结果表明,与对照组相比,试验组羔羊血清中Ig A含量极显著降低(P0.01),Ig M含量显著升高(P0.05)。此外,试验组羔羊发病率均低于对照组。综上所述,黄芪多糖有效用量为0.1 g/kg,为黄芪多糖在羔羊养殖中的推广应用提供了理论依据。     

Toxicologic assessments of a commercial polybrominated biphenyl mixture in the rat.

A polybrominated biphenyl fire retardant (Firemaster FF-1) was responsible for the widespread environmental contamination and animal losses in Michigan during 1973 and 1974. In Fischer 344/N rats orally given 30,100,300, and 1,000 mg/kg (5 days/week, 22 total doses) for 4.5 weeks and observed for 90 days after the start of treatment, the LD50 was determined to be 65 mg/kg/day (total 1.43 g/kg) for the female rat and 149 mg/kg/day (total 3.28 g/kg) for the male. All female rats given the dosage of 100 mg/kg/day (22 doses, total 2.20 g/kg) died between 41 and 53 days after the start of treatment, whereas 38% of the males died between 50 and 73 days. Pathologic changes in treated rats were large liver, accentuation of the hepatic lobular markings, and atrophy of thymus and spleen. Microscopically, hepatic changes were characterized by congestion, fatty metamorphosis, and multifocal liquefactive necrosis. Male rats given 100 mg/kg/day and dying after 90 days had subacute to chronic hepatitis with marked focal proliferation of bile ducts. Exposure to Firemaster FF-1 may produce atypical liver nodules in the rat as early as 6 months after they were first given the preparation. Marked hepatotoxic effect persisted in surviving rats when examined after 6 months.     

姬松茸水溶性粗多糖对镉中毒小鼠脂质过氧化损伤的影响

为了探讨姬松茸水溶性粗多糖对镉中毒小鼠脂质过氧化损伤的影响,将150只SPF级雄性健康小白鼠被随机分为对照组、模型组、试验组1、试验组2、试验组3五组。模型组与3个试验组采用2.5 mg/kg镉染毒,同时对3个试验组给予100 mg/kg、300 mg/kg、500 mg/kg姬松茸水溶性粗多糖溶液进行保护,试验日程为5周。结果,与模型组比较,高剂量多糖保护组试验组2、试验组3小鼠脂质过氧化指标MDA、GSH、GSH-PX明显改善。     

Effects of dopamine administration on cecal mechanical activity and cecal blood flow in conscious healthy horses

Lateral cecal arterial blood flow, carotid arterial pressure, heart rate, and mechanical activity of the circular and longitudinal muscle layers of the cecal body were measured in 7 conscious healthy horses during IV infusion of physiologic saline solution for 60 minutes (control), during a 60-minute IV infusion of dopamine (at dosages of 1, 2.5, and 5 micrograms/kg/min), and for 60 minutes after IV infusion of dopamine. The mean values for lateral cecal arterial blood flow during IV infusion of dopamine at a dosage of either 1 or 2.5 micrograms/kg/min were not significantly different from the mean values for lateral cecal arterial blood flow during IV infusion of saline solution. The mean values for lateral cecal arterial blood flow, however, were significantly greater during IV infusion of dopamine at a dosage of 5 micrograms/kg/min than the mean values for lateral cecal arterial blood flow during IV infusion of saline solution. Intravenous infusion of dopamine at 1 and 2.5 micrograms/kg/min did not significantly change the mean values for carotid arterial pressure. In contrast, the mean values for carotid arterial pressure were significantly less during IV infusion of dopamine at dosages of 2.5 and 5 micrograms/kg/min than during infusion of saline solution. The mean values for heart rate were not significantly altered by infusion of dopamine at a dosage of either 1 or 2.5 micrograms/kg/min, but infusion of dopamine at a dosage of 5 micrograms/kg/min significantly increased heart rate.(ABSTRACT TRUNCATED AT 250 WORDS)     

Effects of a multi-enzyme complex on growth performance,nutrient utilization and bone mineralization of meat duck

Background:Previous studies with broiler have shown dietary supplementation with multi-enzyme complex containing non-starch polysaccharides(NSP) degrading enzymes and phytase is efficient in releasing phosphorus(P),calcium(Ca),energy and amino acids from corn-soybean meal diets or corn-sorghum diets,hence compensating considerable levels of nutrients in formulation.Notwithstanding,such potentials have not been well defined in duck nutrition.Giving China being the largest duck producing country,we conducted this study to establish adequate specifications of major nutrients along with multi-enzyme complex to meat duck from day-old to slaughter,focusing on performance,utilization of nutrients and bone mineralization.Five dietary treatments were:Positive control(PC,T1):the nutrients concentration of diet for 1 to 14 d of age were apparent metabolizable energy(AME) 2,800 kcal/kg,crude protein(CP)19.39%,Ca 0.85%,available phosphorus(avP) 0.42%;for 15 to 35 d of age these parameters were AME2,900 kcal/kg,CP 16.47%,Ca 0.76%,avP 0.38%;Negative control 1(NC1,T2),the AME and digestible amino acids(DAA)were reduced by 70 kcal/kg and 2.0%,avP and Ca by 1.0 g/kg from PC diet;Negative control 2(NC2T4),the downspec from PC diet was AME 100 kcal/kg,DAA 2.5%,avP 1.5 g/kg and Ca 1.2 g/kg;The enzyme complex was added at the same dosage(200 ml7 1,000 kg) on NCI(T3) and NC2(T5) diets.Results:Comparing with the ducks fed on T1,T3 and T5 diets,the birds fed on NC2 diet showed the lowest(P 0.05)body weight(d 14 and 35),feed intake(d 35),tibia ash,Ca and P contents(d 14 and 35),and the utilization of nutrients(P 0.05).The supplementation with the enzyme complex to the NC diets restored growth rate,utilization of nutrients and bone mineralization to the level of the PC diet,and increased AME by 60 kcal/kg and117 kcal/kg,respectively for the NCI and NC2 diets.Conclusion:These results suggest that down-spec AME by 100 kcal/kg,DAA by 2.5%,avP by 1.5 g/kg and Ca by1.2 g/kg caused detrimental effects on duck performance compared with those fed on the PC diet,and these performance losses can be compensated by the addition of the multiple-enzyme complex.     

矮象草补充不同比例米糠和棉粕对生长肥育牛生产性能和经济效益的影响

将20头平均起始体重为223.8±11.5 kg的三元杂交肉牛(本地黄牛×西门塔尔×夏洛来)分成5组进行鲜矮象草Pennisetum purpureum补充不同比例米糠和棉粕的饲养试验,结果表明,不添加补充料组肉牛的平均日增重0.33 kg,极显著低于(P<0.01)其它各组肉牛的平均日增重;当肉牛采食矮象草并每天每千克体重同时补充米糠和棉粕各5 g时,其平均日增重最高,为0.8 kg;每天每千克体重补充米糠和棉粕各2.5 g,肉牛每千克增重成本最低(7.30元),补充料的蛋白质添加量是影响矮象草饲喂价值的主要因素。     

Control of bovine coccidiosis with monensin: in nonresistant newborn calves

Newborn Holstein male calves were purchased within 3 days after birth and were removed from the local farms to the Dixon Springs Agricultural Research Center. They were hand-fed for 7 weeks and then weaned to a prepared feed. Eight groups, each of 4 calves, were housed in separate pens. In each of 4 pens (pens 2 to 5), 1 calf was inoculated with sporulated oocysts of Eimeria bovis (and was not medicated); 1 calf was inoculated and given feed with added monensin at the dosage level of 10 g/906 kg of feed; and 2 calves were inoculated and given medicated feed with added monensin at the dosage level of 20 g/906 kg or 30 g/906 kg. In the 4 other pens (6 to 9), the calves were inoculated with E zuernii and otherwise were given feed without or with added monensin as in pens 2 through 5. Another group of 5 calves (all kept in 1 pen), served as noninoculated, nonmedicated controls. At 14 days after inoculations with E bovis, the single calves in each of the 4 pens that were given the nonmedicated feed began to show clinical signs of coccidiosis and discharged increasing numbers of oocysts. The other inoculated calves (given monensin) had fewer clinical signs and discharged fewer oocysts in the feces as the level of medication in the feed increased. The calves inoculated with E zuernii developed only moderately severe infections when compared with those inoculated with E bovis. Inoculated (with E bovis) nonmedicated calves had severe reductions in feed consumption and weight, and 3 of 4 died.(ABSTRACT TRUNCATED AT 250 WORDS)     

Experimentally induced Cassia roemeriana poisoning in cattle and goats

The dried, ground aerial portions of the plant Cassia roemeriana were administered to each of seven calves at a dosage of 10 g/kg of body weight/day for 2 to 10.5 days and to each of six goats at a dosage of 10 g/kg/day for 5 days or 5 or 7 g/kg/day for 23 to 25 days. Experimentally induced C roemeriana poisoning in both species resulted in hepatopathic poisoning characterized by a brief survival period (3.9 to 7.9 days), moderate-to-severe hepatocellular damage, and little or no evidence of injury to skeletal muscle or resulted in myopathic poisoning characterized by a longer period of survival, mild-to-severe skeletal myopathy, and mild hepatocellular injury. The minimal dosage that induced hepatopathic poisoning (also the minimal lethal dosage) was 10 g/kg/day for 3 days in calves and for 5 days in goats. The minimal dosage that induced the myopathic syndrome (as determined by the earliest increase in serum creatine kinase activity) was 10 g/kg/day for 6 days for calves and 5 g/kg/day for 10 to 16 days for goats.     

A family 11 carbohydrate-binding module (CBM) improves the efficacy of a recombinant cellulase used to supplement barley-based diets for broilers at lower dosage rates

1. Exogenous microbial beta-1,3-1,4-glucanases and hemicellulases contribute to improving the nutritive value of cereals rich in soluble non-starch polysaccharides for poultry. 2. In general, plant cell wall hydrolases display a modular structure comprising a catalytic module linked to one or more non-catalytic carbohydrate-binding modules (CBMs). Based on primary structure similarity, CBMs have been classified in 50 different families. CBMs anchor cellulases and hemicellulases into their target substrates, therefore eliciting efficient hydrolysis of recalcitrant polysaccharides. 3. A study was undertaken to investigate the effects of a family 11 beta-glucan-binding domain in the function of recombinant derivatives of cellulase CtLic26A-Cel5E of Clostridium thermocellum that were used to supplement a barley-based diet at lower dosage rates. 4. The results showed that birds fed on diets supplemented with the recombinant CtLic26A-Cel5E modular derivative containing the family 11 CBM or the commercial enzyme mixture Rovabio Excel AP tended to display improved performance when compared to birds fed diets not supplemented with exogenous enzymes. 5. It is suggested that at lower than previously reported enzyme dosage (10 U/kg vs 30 U/kg of basal diet), the beta-glucan-binding domain also elicits the function of the recombinant CtLic26A-Cel5E derivatives. 6. Finally, the data suggest that exogenous enzymes added to barley-based diets act primarily in the proximal section of the gastrointestinal tract.     

Effects of a multi-enzyme complex on growth performance,nutrient utilization and bone mineralization of meat duck

Background

Previous studies with broiler have shown dietary supplementation with multi-enzyme complex containing non-starch polysaccharides (NSP) degrading enzymes and phytase is efficient in releasing phosphorus (P), calcium (Ca), energy and amino acids from corn-soybean meal diets or corn-sorghum diets, hence compensating considerable levels of nutrients in formulation. Notwithstanding, such potentials have not been well defined in duck nutrition. Giving China being the largest duck producing country, we conducted this study to establish adequate specifications of major nutrients along with multi-enzyme complex to meat duck from day-old to slaughter, focusing on performance, utilization of nutrients and bone mineralization. Five dietary treatments were: Positive control (PC,T1 ): the nutrients concentration of diet for 1 to 14 d of age were apparent metabolizable energy(AME) 2,800 kcal/kg, crude protein (CP)19.39%, Ca 0.85%, available phosphorus (avP) 0.42%; for 15 to 35 d of age these parameters were AME 2,900 kcal/kg, CP 16.47%,Ca 0.76%,avP 0.38%; Negative control 1(NC1,T2), the AME and digestible amino acids (DAA) were reduced by 70 kcal/kg and 2.0%, avP and Ca by 1.0 g/kg from PC diet; Negative control 2( NC2,T4), the down-spec from PC diet was AME 100 kcal/kg, DAA 2.5%, avP 1.5 g/kg and Ca 1.2 g/kg; The enzyme complex was added at the same dosage (200 mL/ 1,000 kg) on NC1 (T3) and NC2 (T5) diets.

Results

Comparing with the ducks fed on T1, T3 and T5 diets, the birds fed on NC2 diet showed the lowest (P < 0.05) body weight ( d 14 and 35), feed intake (d 35), tibia ash, Ca and P contents (d 14 and 35), and the utilization of nutrients (P < 0.05). The supplementation with the enzyme complex to the NC diets restored growth rate, utilization of nutrients and bone mineralization to the level of the PC diet, and increased AME by 60 kcal/kg and 117 kcal/kg, respectively for the NC1 and NC2 diets.

Conclusion

These results suggest that down-spec AME by 100 kcal/kg, DAA by 2.5%, avP by 1.5 g/kg and Ca by 1.2 g/kg caused detrimental effects on duck performance compared with those fed on the PC diet, and these performance losses can be compensated by the addition of the multiple-enzyme complex.     

Efficacy of oxfendazole against inhibited Ostertagia ostertagi in naturally infected cattle.

Oxfendazole was administered to pregnant cows at 2.5 and 5 mg/kg body weight to determine the anthelmintic efficacy against naturally acquired larvae which became inhibited at the early 4th stage. The experimental design included three groups of orally-treated cows, that is, 10 placebo treated control cows, 11 cows treated with 2.5 mg/kg of oxfendazole and 10 cows treated with 5.0 mg/kg of oxfendazole. Oxfendazole at 2.5 mg/kg body weight was 82 and 94% effective against EL-4 and adult O. ostertagi, respectively. At 5 mg/kg, Oxfendazole was 95 and 99% effective against EL-4 And adult O. ostertagi, respectively. The results suggested the use of a field dosage level of 5 mg/kg body weight oxfendazole where inhibited larvae may be encountered.