如何正确使用抗球虫药物

任何一种抗球虫药都不能对所有鸡球虫种类有同等的抗球虫效果,在实际中应当清楚地了解各种抗球虫药的最适抗球虫谱,并且诊断出球虫病的感染球虫种类,才能合理地使用抗球虫药且最大限度地发挥抗球虫效果。     

抗球虫药物的正确选择与使用

球虫病是重要的禽病之一。侵袭雏鸡,往往呈急性暴发,可引起雏鸡腹泻、贫血,以致大批死亡;慢性流行可影响生长,增加饲料消耗。目前,预防和治疗球虫病多采用抗球虫药物。1抗球虫药物的选择1.1选用高效、耐药性低的药物抗球虫药的种类很多,一般可分为离子载体抗生素类和化学合成类     

正确使用抗球虫药

鸡球虫病是危害我市养鸡业的主要寄生虫病。而控制鸡球虫病的主要手段仍然是依赖抗球虫药。由于抗球虫药的长期使用和用药程序的不合理以及盲目用药等问题，使球虫产生了耐药性，导致了防治失败，造成了巨大的经济损失。     

正确使用鸡抗球虫药

(一)常用抗球虫药1.氯苯胍。对柔嫩、毒害、布氏、巨型、堆型和缓和早熟艾美耳球虫的单独或混合感染均有良好的防治效果。60毫克/千克饲料浓度,连喂1～2周。由于氯苯胍长期连续应用己引起严重的球虫耐药性,多数养禽场已停用多年。建议再度合理应用氯苯胍,可能会有较好的抗球虫效果。产蛋鸡禁用,肉鸡休药期为7天。2.尼卡巴嗪(球虫净)。对柔嫩、毒害、堆型、布氏和巨型艾美球虫均有预防作用。感染球虫后48小时内用药,能有效地抑制球虫发育,若用药迟过72小时,则效果明显降低。尼卡巴嗪推荐     

常用抗球虫药物的正确应用

<正>常用抗球虫药物主要有莫能菌素、盐霉素钠、拉沙洛西钠、赛杜霉素、海南霉素钠、地克珠利、托曲珠利、二硝基类、尼卡巴嗪、磺胺喹沙啉、磺胺间甲氧嘧啶、磺胺氯吡嗪钠、氨丙啉、氯苯胍、常山酮、     

如何正确合理使用抗球虫药

鸡球虫病是重要的禽病之一。常侵袭雏鸡。往往呈急性暴发,引起雏鸡下痢、便血、贫血,以致大批死亡;慢性流行可影响发育,影响增重,并增加饲料消耗。现阶段在预防和治疗时多采用抗球虫药物。应用抗球虫药物时应注意以下几个方面。     

鸡抗球虫药的正确使用

1正确使用抗球虫药，控制鸡球虫病的发生 抗球虫药总体上可分为二大类，即聚醚类离子载体抗生素和化学合成药。化学抗球虫药通常有一个较广的活性范围，但它具有较大的产生抗药性的可能，且它仅能产生有限的免疫，有时还有毒性，通常它比离子载体类药物贵。化学合成药和离子载体类药交替使用可以延长一些化学药物，如尼卡巴嗪的使用寿命。四种最常用的化学药物是：尼卡巴嗪、氯苯胍、速丹和杀球灵。尼卡     

抗球虫药物的合理使用

鸡球虫存在非常普遍,对养禽业危害十分巨大。鸡球虫病主要感染3月龄以内的鸡,不同日龄鸡的球虫发病率统计表明,0～14日龄的鸡发病率为20%,15～50日龄高达85%,51～100日龄下降到54%,100～140日龄仅为30%。常见感染鸡的球虫有7种,虽然各种球虫生活史相似,但在寄生部位、致病性和卵囊大小等方面有差别,其中以柔嫩和毒害艾美耳球虫致病力最强,而堆型、巨型、和缓艾美耳球虫虽很常见,但致病性弱,布氏艾美耳球虫虽很少见,但具有高度致病性。自然感染球虫的病例多是几个虫种的混合感染,与单纯感染比较致病性更强,危害性更大。     

鸡病的快速检验诊断法

鸡病的诊断,特别是传染性疾病的诊断,单纯依靠临床症状、病理剖检观察,往往很难作出确诊,为了尽快确诊疾病,常需要采取病料送到检验室做微生物学、寄生虫学或病理组织学检查.病料的采取、保存和送检是否妥当,对快速检验结果有极大的关系,应认真做好此项工作.     

合理使用抗球虫药物及肉鸡球虫病的控制

各日龄的肉鸡对球虫都是敏感的。球虫为单性、细胞内寄生的原虫,发育无需中间宿主,繁殖力极强。虽然从40年代初开始应用磺胺类药物来治疗、预防球虫病,随后又涌现出了一大批不同类型的抗球虫药物,从而使鸡球虫病已不再是毁火性的,但球虫病也并未因此而得到完全控制。相反,在世界范围内,随着集约化养殖业的迅速发展,由球虫病所造成的损失也相应地逐年增     

Toxicity in utility pigeons caused by the coccidiostat dinitolmide

Utility pigeons on 3 farms were affected by a severe neurological disturbance manifested by fine tremors, rolling gait and incoordination. Affected birds had necrosis of the Purkinje cells of the cerebellar cortex. The birds from the 3 farms had been fed a pelleted diet obtained from a single mix of feed prepared by a stockfeed manufacturer. When feed obtained from the farms was given to utility pigeons under controlled conditions at the laboratory, they suffered the same clinical signs and lesions as seen in birds from the farms. Cross-bred cockerels were not affected when given this feed from day-old to 6 weeks of age. Samples of the feed contained 185 to 226 ppm of the coccidiostat dinitolmide. Utility pigeons given a prepared diet containing a similar level (234 ppm) of dinitolmide developed an identical condition after 3 to 4 weeks feeding. Laying hens were not affected by this feed. Dimetridazole, which was also present in some of the original feed samples, did not exacerbate the condition when included in the diet at a rate of 233 ppm. Production of squabs from the affected farms was dramatically reduced, and many of the breeder had to be culled because of the long-standing neurological disease.     

家禽的合理用药

随着养禽业规模化、集约化的不断发展，近年来，家禽疾病趋向复杂化，如何准确、经济、有效地选用药物防治各种疾病，已被业界所重视。本文根据家禽的生理特点、生化代谢特点、繁殖特点、疾病辅助治疗及药物配伍特点等方面概述了如何进行合理用药。１家禽的解剖生理特点与合理用药１．１消化系统特点与合理用药家禽没有牙齿，味觉不发达，所以鸡对苦味药照食不误。但使用苦味健胃药疗效差；对咸味无鉴别能力，但鸡爱挑食盐颗粒，而引起食盐中毒，应严格掌握食盐用量。家禽的嗉囊是食入体内饲料暂时存放的场所，可经嗉囊注入给药，但应注意对…     

Bovine coccidiosis: protective effects of low-level infection and coccidiostat treatments in calves

Twenty coccidia-free Holstein bull calves were allotted to groups to study effects of treatment with lasalocid and decoquinate on subsequent resistance to coccidiosis (Eimeria spp infections). Calves fed medicated rations of either drug at dosages of 50 mg/kg of feed (approx 1.2 mg/kg of body weight) had significantly fewer oocysts (P less than 0.01) than did nontreated controls regardless of other procedures used. Treated calves premunized with 2,000 oocysts/day for 5 days and later challenge inoculated with 200,000 oocysts did not develop diarrhea, unless the drugs were withdrawn from feed. Animals premunized (2,000 oocysts/day for 5 days) in absence of drug were no more resistant to the challenge inoculation than nonpremunized animals. These results indicated that lasalocid and decoquinate were efficacious coccidiostats and protected calves as long as they were administered. Cessation of drug treatment usually resulted in appearance of oocysts in feces and diarrhea. Premunization alone cannot be expected to prevent coccidiosis when animals are exposed to large numbers of oocysts.     

预混料加工的注意事项(第一部分)

与动物的常规饲料生产相反,预混料添加剂的加工是一件精细的工作。在预混料添加剂的整个生产过程中,既要确保其具有较高的精确性,又必须将交叉污染风险降至最低程度。本文我们将对添加剂和载体的特性进行详细的论述,至于预混料的加工特性将在下一篇文章中予以介绍。     

预混料加工的注意事项（第二部分）

在上一篇文章《(Feed Tech》Vol.11,№5:30-31,译文见本刊总第28卷(2008)第1期第60-61页)中,我们主要介绍了预混料添加剂的活性组分和载体材料的要求,本文将详细介绍预混料加工厂生产过程中的要求。