Hogan J S, Harmon R J, Langlois B E, Hemken R W, Crist W L
J Dairy Sci. 1984 Aug;67(8):1850-9. doi: 10.3168/jds.S0022-0302(84)81513-1.
Efficacy of an iodine backflush system for reducing new intramammary infection was tested in two 11-wk trials. Forty cows in each trial were paired by breed, age, stage of lactation, and intramammary infection status. Each pair was assigned randomly either to a group milked with clusters that were reverse flushed with water, 25 ppm iodine, water and air or to a group milked with clusters receiving no backflush treatment between cows. Backflushing clusters reduced infections caused by Corynebacterium bovis and coagulase-positive staphylococci in both trials. However, backflushing clusters produced no clear advantage for reducing new infections with coagulase-negative staphylococci, Gram-negative bacilli, or streptococci (species other than Streptococcus agalactiae). No differences in somatic cell counts between experimental groups were observed. Teat cup liners and teat ends were swabbed after 120 and 1200 milkings/liner. Total microbial counts were significantly greater for liners that were not backflushed than from backflushed liners at each swabbing. However, no differences were significant between groups for mean teat end microbial counts in either trial.
在两项为期11周的试验中，对一种用于减少新的乳房内感染的碘反冲洗系统的效果进行了测试。每项试验中的40头奶牛按品种、年龄、泌乳阶段和乳房内感染状况进行配对。每对奶牛被随机分配到一组，该组使用用水、25 ppm碘、水和空气进行反向冲洗的集乳器挤奶，或者分配到一组使用在奶牛之间不进行反冲洗处理的集乳器挤奶。在两项试验中，反冲洗集乳器均减少了由牛棒状杆菌和凝固酶阳性葡萄球菌引起的感染。然而，反冲洗集乳器在减少凝固酶阴性葡萄球菌、革兰氏阴性杆菌或链球菌（无乳链球菌以外的菌种）引起的新感染方面没有明显优势。未观察到实验组之间体细胞计数的差异。在每个集乳器进行120次和1200次挤奶后，对奶嘴杯内衬和乳头末端进行擦拭取样。在每次擦拭时，未进行反冲洗的内衬的总微生物计数显著高于进行反冲洗的内衬。然而，在两项试验中，两组之间乳头末端平均微生物计数均无显著差异。
