Lianou Daphne T, Michael Charalambia K, Vasileiou Natalia G C, Petinaki Efthymia, Cripps Peter J, Tsilipounidaki Katerina, Katsafadou Angeliki I, Politis Antonis P, Kordalis Nikos G, Ioannidi Katerina S, Gougoulis Dimitris A, Trikalinou Constantina, Orfanou Denise C, Fragkou Ilektra A, Angelidou Elisavet, Katsarou Eleni I, Tzora Athina, Albenzio Marzia, Mavrogianni Vasia S, Caroprese Mariangela, Fthenakis George C
Veterinary Faculty, University of Thessaly, 43100 Karditsa, Greece.
Faculty of Animal Science, University of Thessaly, 41110 Larissa, Greece.
Foods. 2021 Jan 28;10(2):268. doi: 10.3390/foods10020268.
Objectives were to investigate somatic cell counts (SCC) and total bacterial counts (TBC) in the raw bulk-tank milk of sheep flocks in Greece, to study factors potentially influencing increased SCC and TBC in the bulk-tank milk of sheep and to evaluate possible associations of SCC and TBC with milk content. Throughout Greece, 325 dairy sheep flocks were visited for collection of milk sampling for somatic cell counting, microbiological examination and composition measurement. Geometric mean SCC were 0.488 × 10 cells mL; geometric mean TBC were 398 × 10 cfu mL; 228 staphylococcal isolates were recovered form 206 flocks (63.4%). Multivariable analyses revealed annual incidence risk of clinical mastitis, age of the farmer and month into lactation period (among 53 variables) to be significant for SCC > 1.0 × 10 cells mL and month into lactation period at sampling and availability of mechanical ventilators (among 58 variables) to be significant for TBC > 1500 × 10 cfu mL. Negative correlation of SCC with fat, total protein and lactose and positive correlation of SCC with added water were found. With SCC > 1.0 × 10 cells mL, significant reduction of protein content (2%) was observed, whilst in flocks with SCC > 1.5 × 10 cells mL, significantly lower annual milk production per ewe (42.9%) was recorded.
目的是调查希腊绵羊群体原料奶罐中的体细胞计数（SCC）和总细菌计数（TBC），研究可能影响绵羊奶罐中SCC和TBC升高的因素，并评估SCC和TBC与牛奶成分之间的可能关联。在希腊各地，走访了325个奶羊群体，采集牛奶样本进行体细胞计数、微生物学检查和成分测量。几何平均SCC为0.488×10⁶个细胞/毫升；几何平均TBC为398×10³cfu/毫升；从206个群体（63.4%）中分离出228株葡萄球菌。多变量分析显示，临床乳腺炎的年发病风险、养殖户年龄和泌乳期月份（在53个变量中）对于SCC>1.0×10⁶个细胞/毫升具有显著意义，而采样时的泌乳期月份和机械通风设备的可用性（在58个变量中）对于TBC>1500×10³cfu/毫升具有显著意义。发现SCC与脂肪、总蛋白和乳糖呈负相关，与添加水呈正相关。当SCC>1.0×10⁶个细胞/毫升时，观察到蛋白质含量显著降低（2%），而在SCC>1.5×10⁶个细胞/毫升的群体中，每只母羊的年奶产量显著降低（42.9%）。
