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| Month-Wise Prevalence of Subclinical Mastitis in Dairy Cows in Guangdong Province, China |
| YANG Jin-bo, WEI Neng , WEN Liu-fa |
| 1.College of Animal Science, South China Agricultural University, Guangzhou 510642, P.R.China |
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摘要
To evaluate the month-wise prevalence of subclinical mastitis (SM) and its relations with climatic temperature and humidity, and to provide references for control and prevention of mastitis in dairy cows in Guangdong, China, California mastitis test method was used to determine the monthly prevalence of SM (MPSM, %) of lactating Holstein cows from 11 dairy farms in Guangdong Province, China, including about 516 cows per monthly examination. The average MPSM on a cow and a quarter basis were 30 and 13% respectively, and there was a positive linear correlation between monthly mean air temperature (MT, °C) and MPSM on a cow basis (r=0.763, P=0.004) or a quarter basis (r=0.577, P=0.049), but there were no correlations between MT and MPSM on a cow or a quarter basis (P>0.05). There was a shift in MPSM trend that the highest MPSM (38.4%) was not for the hottest July with MT at 30.8°C, but for the later September at 27.9°C. The farms need to develop new housing conditions to control cowshed temperatures in the hot season to reduce the mastitis prevalences in the posthot months.
Abstract To evaluate the month-wise prevalence of subclinical mastitis (SM) and its relations with climatic temperature and humidity, and to provide references for control and prevention of mastitis in dairy cows in Guangdong, China, California mastitis test method was used to determine the monthly prevalence of SM (MPSM, %) of lactating Holstein cows from 11 dairy farms in Guangdong Province, China, including about 516 cows per monthly examination. The average MPSM on a cow and a quarter basis were 30 and 13% respectively, and there was a positive linear correlation between monthly mean air temperature (MT, °C) and MPSM on a cow basis (r=0.763, P=0.004) or a quarter basis (r=0.577, P=0.049), but there were no correlations between MT and MPSM on a cow or a quarter basis (P>0.05). There was a shift in MPSM trend that the highest MPSM (38.4%) was not for the hottest July with MT at 30.8°C, but for the later September at 27.9°C. The farms need to develop new housing conditions to control cowshed temperatures in the hot season to reduce the mastitis prevalences in the posthot months.
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Received: 22 December 2010
Accepted:
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| Fund: This work was supported by the Integrated Production Technologies in Dairy Industry and Their Industrialization Demonstrations in Guangdong Province (2002BA518A18), under the National Key Science and Technology Special Projects of China for Dairy Industry During the 10th Five-Year Plan Period (2002BA518A18). |
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Corresponding Authors:
Correspondence WEN Liu-fa, Mobile: 13826009985, Fax: +86-20- 85280740, E-mail: wenliufa@scau.edu.cn
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| About author: YANG Jin-bo, Mobile: 13802791905, Fax: +86-20-85280740, E-mail: yangjb@scau.edu.cn |
Cite this article:
YANG Jin-bo, WEI Neng , WEN Liu-fa.
2012.
Month-Wise Prevalence of Subclinical Mastitis in Dairy Cows in Guangdong Province, China. Journal of Integrative Agriculture, 12(1): 166-169.
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| [1]Batavani R A, Asri S, Naebzadeh H. 2007. The effect of subclinical mastitis on milk composition in dairy cows. Iranian Journal of Veterinary Research, 8, 205-211. [2]Hortet P, Seegers H. 1998. Loss in milk yield and related composition changes resulting from clinical mastitis in dairy cows. Preventive Veterinary Medicine, 37, 1-20. [3]Lacetera N, Bernabucci U, Scalia D, Ronchi B, Kuzminsky G, Nardone A. 2005. Lymphocyte functions in dairy cows in hot environment. International Journal of Biometeorology, 50, 105-110. [4]Morse D, de Lorenzo M A, Wilcox C J, Collier R J, Natzke R P, Bray D R. 1988. Climatic effects on occurrence of clinical mastitis. Journal of Dairy Science, 71, 848-853. [5]Mu X M, Li C X, Ma X P, Li D. 2008. Study of relationship between temperature, humidity and bovine mastitis Morbidity. Journal of Hebei North University (Natural Science Edition), 24, 36-38. (in Chinese) [6]National Bureau of Statistics of the People’s Republic of China (NBSPRC). China Statistical Yearbook. [2010-12-19]. http://www.chuandong.com/html/yearbook/ china2009/indexch.htm (in Chinese) [7]Plastridge W N. 1985. Bovine mastitis: a review. Journal of Dairy Science, 41, 1141-1181. [8]Schalm O W, Noorlander D D. 1957. Experiments and observations leading to development of the California mastitis test. Journal of the American Veterinary Medical Association, 130, 199-204. [9]Shukla S K, Dixit V P, Thylial D C, Grang S K, Kumar A. 1997. A note on the incidence of bovine mastitis in relation to teat shape, size and quarters affected. Indian Veterinary Journal, 74, 989-900. [10]Smith K L, Todhunter D A, Schoenberger P S. 1985. Environmental mastitis: cause, prevalence, prevention. Journal of Dairy Science, 68, 1531-1553. [11]Statistics Bureau of Guangdong Province (SBGD). [2010-12-19]. http://www.gdstats.gov.cn/tjnj/table/11/c11_25. htm (in Chinese) [12]Stewart P G. 2005. The care and handling of dairy cattle. [2010-12-19]. [13]http://agriculture.kzntl.gov.za/portal/AgricPublications/ProductionGuidelines/DairyinginKwaZuluNatal/TheCareand HandlingofDairy Cattle/ tabid/233/Default.aspx [14]Wang D M. 2007. The status of dairy industry in Guangdong and suggestions to the problems. China Food Industry, 8, 12-15. (in Chinese) |
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