克炎晶对奶牛乳房炎的治疗试验

使用克炎晶采用不同给药途径、不同剂量、不同疗程,对24例临床型乳房炎患牛和8例隐性乳房炎患牛进行了分组治疗试验。结果表明,每千克体重使用克炎晶0.5～1.0mg1～2次就能有效杀灭隐性乳房炎致病菌;对于临床型乳房炎,每千克体重0.5～1.0mg剂量总有效率为60%(9/15),而1.5mg总有效率为88.9%(8/9)。乳区基部注射总有效率为77.8%(7/9);乳池内注入总有效率为88.9%(8/9);肌肉注射总有效率为33.3%(2/6)。因此,临床治疗时应选择每千克体重1.5mg作为用药剂量,乳房基部注射和乳池内注入作为用药方法,疗程为3～5d。

Seasonal and Spatial Variation in the Monitoring Parameters of Zomar Stream, Palestine during 2010

Levels of pollutants at Zomar stream, the only recreational area for the inhabitants of the northern part of the West Bank, Palestine, were recently determined, and have shown to be relatively high. Three bathing sites along the Zomar stream area were monitored for one year （fortnightly）. Wastewater samples were subjected to microbiological analysis （fecal coliforms, Escherichia coli, Pseudomonas, Enterococcus and Klebsiella）, physico-chemical analyses （water temperature, pH, electroconductivity and DO （dissolved oxygen））, biochemical oxygen demand, total Kjeldahl nitrogen and ammonia. The study results demonstrated seasonal and locational variations in all parameters studied. The highest levels of pollution were detected during summer, especially before a rainfall or after a discharge from onsite cesspits. Locations associated with sewage discharge were found to have the highest fecal indicator levels.