Factors Affecting Herd Status for Bovine Tuberculosis in Dairy Cattle in Northern Thailand. (3rd May 2017)

• Record Type: Journal Article
• Authors: Singhla, Tawatchai; Boonyayatra, Sukolrat; Punyapornwithaya, Veerasak; VanderWaal, Kimberly L.; Alvarez, Julio; Sreevatsan, Srinand; Phornwisetsirikun, Somphorn; Sankwan, Jamnong; Srijun, Mongkol; Wells, Scott J.
• Other Names: Ravis William Academic Editor.
• Is Part Of: Veterinary medicine international. Volume 2017(2017)
• Publication Date: 2017-05-03
• Subjects: Veterinary medicine -- Periodicals; Veterinary Medicine; Veterinary medicine; Periodicals; Periodicals; 636.089
• DOI: 10.1155/2017/2964389
• Languages: English
• ISSNs: 2090-8113

Abstract

Abstract : The objective of this case-control study was to identify farm-level risk factors associated with bovine tuberculosis (bTB) in dairy cows in northern Thailand. Spatial analysis was performed to identify geographical clustering of case-farms located in Chiang Mai and Chiang Rai provinces in northern Thailand. To identify management factors affecting bTB status, a matched case-control study was conducted with 20 case-farms and 38 control-farms. Case-farms were dairy farms with at least single intradermal tuberculin test- (SIT-) reactor(s) in the farms during 2011 to 2015. Control-farms were dairy farms with no SIT-reactors in the same period and located within 5 km from case-farms. Questionnaires were administered for data collection with questions based on epidemiological plausibility and characteristics of the local livestock industry. Data were analyzed using multiple logistic regressions. A significant geographic cluster was identified only in Chiang Mai province (p < 0.05 ). The risk factor associated with presence of SIT-reactors in dairy herds located in this region was purchasing dairy cows from dealers (OR = 5.85, 95% CI = 1.66–20.58, and p = 0.006 ). From this study, it was concluded that geographic clustering was identified for dairy farms with SIT-reactors in these provinces, and the cattle movements through cattle dealers increased the risks for SIT-reactor farm status.