Wanasinghe D D, Frost A J
Aust Vet J. 1979 Aug;55(8):374-80.
Quarter samples from twenty-five dairy herds, representing 223 herds supplying direct to Brisbane, were cultured and submitted to the Wisconsin Mastitis Test (WMT). Thirteen herds had a history of producing bulk milk with a consistently high WMT score (greater than 15 mm) and in twelve herds the WMT score was consistently low. Prevalence of infection was higher in group A herds (22.2% quarters were infected with Staphylococcus aureus or streptococci) than in group B herds (9.8% of quarters were infected). There was considerable scatter of prevalence among both groups of herds. Overall, S. aureus was found in 19% of cows and 7% of quarters, and Streptococcus agalactiae in 15% of cows and 7% of quarters. Quarters from group A herds showed a higher WMT score than those in group B herds whether infected with S. aureus, Str. agalactiae, micrococci or yielded no detectable organisms. It was concluded that regular surveys are required of the high cell count herds to monitor mastitis status in the industry.
从25个奶牛场采集了四分之一的样本，这些奶牛场代表了223个直接向布里斯班供货的牛群，对样本进行了培养并进行了威斯康星乳房炎检测（WMT）。13个牛群有生产的大罐牛奶WMT评分一直很高（大于15毫米）的历史，12个牛群的WMT评分一直很低。A组牛群的感染率（22.2%的四分之一乳房感染金黄色葡萄球菌或链球菌）高于B组牛群（9.8%的四分之一乳房感染）。两组牛群中感染率都有相当大的离散度。总体而言，19%的奶牛和7%的四分之一乳房中发现了金黄色葡萄球菌，15%的奶牛和7%的四分之一乳房中发现了无乳链球菌。无论A组牛群的四分之一乳房感染金黄色葡萄球菌、无乳链球菌、微球菌还是未检测到任何微生物，其WMT评分都高于B组牛群。得出的结论是，需要对高体细胞数牛群进行定期调查，以监测该行业的乳房炎状况。
