CAJ | 학술논문

为了解宁夏地区奶牛乳腺炎的发生情况及流行规律，采用兰州乳房炎诊断法（LMT 法），对银川市、吴忠市、石嘴山市和中卫市的10个规模化牛场2527头奶牛进行乳腺炎调查。调查结果显示，调查牛场奶牛临床性乳腺炎发病率为13．18％，隐性乳腺炎阳性率为36．49％，乳区阳性率为17．75％。调查牛场隐性乳腺炎阳性率随奶牛胎次的增加而升高，不同胎次间差异极显著（P ＜0．01）；奶牛各乳区均可发生隐性乳腺炎，但左、右侧乳区和前、后侧乳区阳性率差异不显著（P ＞0．05）；随着奶牛泌乳期的延长，乳腺炎阳性率相应提高，各泌乳阶段差异显著（P ＜0．05）；日产奶量在10 kg 以下组和31 kg 以上组的奶牛阳性率比产奶量在11 kg～20 kg 组和21 kg～30 kg 组的奶牛高；夏季和秋季乳腺炎的阳性率高于春季和冬季，差异极显著（P ＜0．01）。
위료해저하지구내우유선염적발생정황급류행규률，채용란주유방염진단법（LMT 법），대은천시、오충시、석취산시화중위시적10개규모화우장2527두내우진행유선염조사。조사결과현시，조사우장내우림상성유선염발병솔위13．18％，은성유선염양성솔위36．49％，유구양성솔위17．75％。조사우장은성유선염양성솔수내우태차적증가이승고，불동태차간차이겁현저（P ＜0．01）；내우각유구균가발생은성유선염，단좌、우측유구화전、후측유구양성솔차이불현저（P ＞0．05）；수착내우비유기적연장，유선염양성솔상응제고，각비유계단차이현저（P ＜0．05）；일산내량재10 kg 이하조화31 kg 이상조적내우양성솔비산내량재11 kg～20 kg 조화21 kg～30 kg 조적내우고；하계화추계유선염적양성솔고우춘계화동계，차이겁현저（P ＜0．01）。
To learn the occurrence and prevalence of mastitis in Ningxia region,2527 cows were survied by using LMT from 10 large-scale dairy cow farms in Yinchuan,Wuzhong,Shizuishan and Zhongwei.In the survey,the average incidence of clinical mastitis was 13.18%;the average positive percentage of subclinical mastitis was 36.49%,and the average positive percentage of subclinical mastitis of mammary areas was 17.15%.The positive percentage of subclinical mastitis increased with increasing parities,and was significantly different among parities (P<0.01).Subclinical mastitis could occur in each mammary area,but the positive percentage of subclinical masti-tis between left-rigt mammary area and front-rear mammary area had no significant difference (P>0.05).The pos-itive percentage of subclinical mastitis increased with extending lactation,and was significantly different in each stage of lactation (P <0.05).The positive percentage of subclinical mastitis in groups of daily milk yields less than10 kg and more than 31 kg was higher than that in groups of 11 kg-20 kg and 21 kg-30 kg.The positive per-centage of subclinical mastitis in summer and autumn was higher than that in spring and winter,and the difference was significant (P<0.01).