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首页> 外文期刊>Tropical Animal Health and Production >Survey of mycotic mastitis in dairy cows from Heilongjiang Province, China.
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Survey of mycotic mastitis in dairy cows from Heilongjiang Province, China.

机译：中国黑龙江省奶牛的霉菌性乳腺炎调查。

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A survey of the prevalence rate, pathogenic subspecies, and risk factors of mycotic mastitis in dairy cows from Heilongjiang Province, China, was conducted. Milk samples from 412 cows with chronic mastitis were collected and cultured on 8% sheep blood agar, MacConkey agar, and Sabouraud agar with chloramphenicol. Counting of the morphologically distinct colonies was performed, as well as the isolation and identification of organisms through phenotypical and physiological criteria. Four hundred seventy-eight aerobic microorganisms were isolated. Yeasts and yeast-like fungi 35.6% (170/478) and bacteria 64.4% (308/478) were isolated. The fungal isolates were identified as Candida (79.4%), Trichosporon (5.9%), Aspergillus (7.1%), Cryptococcus (2.4%), and Rhodotorula (4.1%). More than ten species of yeast were isolated including Candida krusei 50/135 (37%), Candida rugosa 16/135 (11.9%), and Candida lusitaniae 15/135 (11.1%). A higher positivity (18.5 and 56.3%) (P<=0.05) was observed in cows from environmental temperatures of 0-15 and 15-35 degrees C than those at <0 degrees C and in cows affected by the disease for >45 and 30-45 days compared with cows suffering 10-30 days. Meanwhile, a statistically significant difference (44.9 vs. 31.4%) (P<=0.05) was observed under extensive raising systems vs. intensive raising systems. It appears that Candida is a major pathogen of mycotic mastitis of dairy cows. Extensive raising system, high environmental temperature (15-35 degrees C), and the duration of the disease (>30 days) were important risk factors of the incidence of mycotic mastitis. Here, we provide a theoretical foundation for research into preventing and treating mycotic mastitis of dairy cows in China.
机译：对中国黑龙江省奶牛的患病率，致病性亚种和霉菌性乳腺炎的危险因素进行了调查。收集来自412例慢性乳腺炎母牛的牛奶样品，并在8％的羊血琼脂，MacConkey琼脂和Sabouraud琼脂中用氯霉素进行培养。进行了形态上不同的菌落的计数，并通过表型和生理标准对生物进行了分离和鉴定。分离出478个好氧微生物。分离出酵母和类酵母真菌35.6％（170/478）和细菌64.4％（308/478）。真菌分离物鉴定为假丝酵母（79.4％），曲霉菌（5.9％），曲霉菌（7.1％），隐球菌（2.4％）和红球菌（4.1％）。分离出十多种酵母，包括克鲁斯假丝酵母50/135（37％），皱纹假丝酵母16/135（11.9％）和卢西坦假丝酵母15/135（11.1％）。在环境温度为0-15和15-35摄氏度的母牛中，与在<0摄氏度的环境相比，以及在受疾病影响大于45和45的母牛中，观察到更高的阳性率（18.5和56.3％）（P <= 0.05）。 30-45天，而患奶牛10-30天。同时，在粗养系统与粗养系统之间观察到统计学显着差异（44.9 vs. 31.4％）（P <= 0.05）。念珠菌似乎是奶牛霉菌性乳腺炎的主要病原体。广泛的饲养系统，高环境温度（15-35摄氏度）和疾病持续时间（> 30天）是霉菌性乳腺炎发病的重要危险因素。在此，我们为我国防治奶牛霉菌性乳腺炎的研究提供理论依据。

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