Chagonda Lameck S, Ndikuwera Jason
Department of Pharmacy and Department of Clinical Veterinary Studies, University of Zimbabwe, P.O. Box MP167, Mount Pleasant, Harare, Zimbabwe.
J Food Prot. 1989 Oct;52(10):731-732. doi: 10.4315/0362-028X-52.10.731.
Raw milk samples from 73 individual milk producers were obtained at the three main Dairy Marketing Board (DMB) collection centers in Zimbabwe during the period of January to February, 1988. The samples were examined for the presence of antibiotics using the Delvotest-P (Gist-Brocades) ampoule test method with a sensitivity of 0.002 I.U. of penicillin per ml of milk. Four samples (5.5%) contained more than 0.005 I.U. of penicillin per ml or equivalent. Two (2.8%) samples contained antibiotics other than penicillin. An antibiotic depletion study using 23 cows treated with a multiple antibiotic intramammary infusion product, streptomycin - penicillin mixture (Dispolac RX4 B®; Coopers, South Africa), indicated a withholding period of 7-8 d was necessary to obtain milk free of detectable residues. The sensitivity of the Delvotest-P for streptomycin was determined by the manufacturers and found to be 4-6 μg/ml.
1988年1月至2月期间，从津巴布韦三个主要的乳制品营销委员会（DMB）收集中心采集了73位个体奶农的生鲜乳样本。使用灵敏度为每毫升牛奶含0.002国际单位青霉素的德尔伏测试-P（吉斯特-布罗卡德斯）安瓿测试法检测样本中是否存在抗生素。四个样本（5.5%）每毫升含有的青霉素超过0.005国际单位或等量物。两个样本（2.8%）含有除青霉素以外的抗生素。一项对23头奶牛使用多种抗生素乳房内灌注产品（链霉素-青霉素混合物，Dispolac RX4 B®；南非库珀斯公司）进行的抗生素清除研究表明，需要7至8天的停药期才能获得无可检测残留的牛奶。制造商测定了德尔伏测试-P对链霉素的灵敏度，发现为4至6微克/毫升。
