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http://dx.doi.org/10.7853/kjvs.2018.41.2.63

The effect of tuberculin test and various associated environmental factors on the quantity and the quality of milk production of the daily cow  

Ku, Kyung-Nyer (Department of Animal Disease Prevention and Hygiene)
Jeon, Ho-Jun (Gyeonggido Veterinary Service)
Kim, Hyo-Jun (Gyeonggido Veterinary Service)
Jeong, Jun-Yong (Gyeonggido Veterinary Service)
Publication Information
Korean Journal of Veterinary Service / v.41, no.2, 2018 , pp. 63-69 More about this Journal
Abstract
This study was conducted to evaluate the effect of tuberculin test and associated various environmental factors on the quantity and quality of milk production of daily cows. The change of milk quantity followed to tuberculin test was investigated on 109 daily farms in south Gyeonggi, and the change of milk quality was also studied on 48 daily farms. The result of this study showed that the quantity and quality of milk production was decreased after tuberculin test (P<0.05). The amount of loss of the milk production due to tuberculin test was, however, only 0.92 L per cow. In terms of milk quality, the level of total protein was statistically significantly decreased. This study also showed that the milk quality was further decreased when the cows were restraint after veterinarians arrived compared to the case that cows were stayed restraint before the veterinarians visited the farm. In addition, milk quality and quantity were lowered worse when relative humidity of the location of tuberculin test was lower than 50% or higher than 70%, or when the milk production of a farm is higher than its quarter. This study showed that stress on daily cows and the farmers induces the decrease of milk yield and milk quality, and these losses can be minimized by regulating various environmental factors to the direction to maximize productivity.
Keywords
Tuberculin test; Tuberculosis; Daily cows; Stress; Milk yield;
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