The impact of dairy cows' bedding material and its microbial content on the quality and safety of milk - A cross sectional study of UK farms.

摘要: The introduction of bedding dairy cows on recycled manure solids (RMS) in the UK led to concern by competent authorities that there could be an increased, unacceptable risk animal and human health. A cross-sectional study was designed evaluate microbial content different materials, when used cows, its impact milk. Data were collected from farms lactating sand (n = 41), sawdust 44) RMS 40). mean duration use prior sampling 13 months. Total bacterial count, counts Streptococcus/Enterococcus spp., Staphylococcus Bacillus cereus, thermophilic, thermoduric psychrotrophic bacteria determined Samples evaluated for presence/absence Listeria monocytogenes, Salmonella spp. Yersinia enterocolitica. milking practices investigate their potential reduce transfer There substantial differences both within between materials. However, no significant groups milk any organisms studied, correlations load Fore-milking associated with a reduced total count Dipping teats disinfectant drying, milking, lower numbers Disinfecting clusters reduction thermophilic This did not provide evidence increased presence Y. enterocolitica, or L. monocytogenes strength this conclusion should tempered relatively small number which enterocolitica isolated. It is concluded that, despite higher RMS, as need than sawdust. finding must interpreted light recent material studied. Teat preparation provides control point microorganisms detection zoonotic pathogens proportion samples, independent type, indicates pasteurisation consumption remains important measure.