Porcine neonatal coccidiosis: evaluation of monensin as preventive therapy

In this study, we evaluated the efficacy of monensin as a preventive therapy for porcine neonatal coccidiosis. Fifteen three-day-old piglets were given 50,000 sporulated oocysts of Isospora suis and eight of them received 15 mg/kg of monensin orally every other day. Seven piglets served as normal controls. Fecal samples were collected and checked for oocyst shedding. At 18 days of age, piglets were euthanized and necropsied.

The onset of clinical signs was delayed in the treated group, but all inoculated piglets displayed anorexia, soft stool, or diarrheic feces. Treated piglets shed large numbers of oocysts in their feces (up to 201,200 oocysts per gram of feces). All infected piglets had lesions of villous atrophy in the jejunum and most of them were in the late atrophic or villous regrowth stages.

The results of this study suggest that monensin does not prevent clinical signs, oocyst shedding, and intestinal lesions caused by I. suis in neonatal piglets.

     

Ruminant coccidiosis.

Coccidiosis is a protozoan disease of wild and domestic ruminant animals in every country of the world. This article provides basic information regarding the terminology, biology, epidemiology, pathology, diagnosis and control methods applicable to the causative agents and their interaction with host animals.     

A study of foot disease of dairy cattle in quebec

A 12 month survey of the different diseases of the digital region of dairy cattle was conducted in the province of Quebec in order to determine the relation between the frequency of the main digital lesions and different factors involved.

Sole ulcer, white zone disease and erosion of the bulb represented 88.6% of all the lesions. The majority of the cases were recorded during the pasture season. An initial peak of prevalence was found in two year old heifers but cows were mainly affected between the ages of five to eight years. Sixty-six percent of the lesions appeared during the first three months of lactation.

     

鸡球虫疫苗研究进展

鸡球虫病广泛分布于世界各地,是危害养鸡业的重要寄生虫疫病之一。本文对球虫抗原疫苗及其实验性免疫效果的近年研究进展和球虫疫苗的应用前景等进行较全面系统的阐述,为鸡球虫病的防治提供重要的参考依据。     

宁化县农户混合散养肉鸡和蛋鸡感染球虫的调查与分析

对宁化县部分农户混合散养肉鸡和蛋鸡感染球虫的情况进行调查。随机采集鸡粪,用饱和盐水漂浮法进行样品检测,结果表明:所调查4个乡镇农户散养鸡的球虫感染率高达64.22%。鸡在15~49日龄以及4~6月份高温高湿季节,其球虫感染率最高。