Irie Yusuke, Ono Mamiko, Aritsune Manami, Imamura Yamato, Nishioka Shinobu, Akiyama Kiyoshi, Enokidani Masafumi, Horikita Tetsuya
Laboratory of Large Animal Clinical Sciences, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan.
Kanagawa Prefecture Government, 1 Nihon ohdouri, Naka-ku, Yokohama, Kanagawa 231-8588, Japan.
J Vet Med Sci. 2021 Jun 2;83(5):863-868. doi: 10.1292/jvms.20-0432. Epub 2021 Mar 30.
Cleanliness of milking equipment is known to be important for the safety of dairy products and to prevent the spread of diseases among cows. We investigated the cleaning procedures of milking equipment and suckling equipment on Japanese dairy farms, and the cleanliness of bucket milkers, suckling buckets, milk receivers, and bulk tanks, using adenosine triphosphate (ATP) bioluminescence test. Bulk tanks (except one bulk tank) and milk receivers were washed by automated cleaning, but all bucket milkers and suckling buckets were washed by manual cleaning. Detergents were often not used to clean bucket milkers and suckling buckets. The log transformed relative luminescence units (LRLU) of equipment washed by manual cleaning was higher than equipment washed by automated cleaning. Clean surfaces (≤2.2 LRLU) were only observed on the bulk tank and the milk receiver. More than 50% of the LRLU of the mouthpiece, the rubber packing of claw, and the nipple of the suckling bucket were determined dirty. These results suggest that the cleanliness of the bucket milkers and the suckling buckets washed by manual cleaning was lower than that of the equipment washed by automated cleaning, and may be due to insufficient cleaning procedures.
挤奶设备的清洁对于乳制品安全以及预防疾病在奶牛间传播至关重要，这是众所周知的。我们使用三磷酸腺苷（ATP）生物发光测试，对日本奶牛场的挤奶设备和哺乳设备的清洁程序，以及桶式挤奶机、哺乳桶、牛奶接收器和贮奶罐的清洁程度进行了调查。贮奶罐（除一个贮奶罐外）和牛奶接收器采用自动清洗，但是所有桶式挤奶机和哺乳桶均采用人工清洗。人工清洗桶式挤奶机和哺乳桶时常常不使用洗涤剂。人工清洗的设备经对数转换后的相对发光单位（LRLU）高于自动清洗的设备。仅在贮奶罐和牛奶接收器上观察到清洁表面（≤2.2 LRLU）。哺乳桶的吸嘴、爪形橡胶密封垫和奶嘴超过50%的LRLU被判定为脏污。这些结果表明，人工清洗的桶式挤奶机和哺乳桶的清洁程度低于自动清洗的设备，这可能是由于清洗程序不充分所致。
