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Prevalence and associated risk factors for bovine tick infestation in two districts of lower Punjab, Pakistan.

Journal:
Preventive veterinary medicine


Issue Date:
2009


Abstract(summary):

Bovine tick infestation is still a serious nuisance to livestock and the dairy industry of Pakistan. The current paper reports the prevalence and associated risk factors for bovine tick infestation in the districts Layyah and Muzaffargarh of lower Punjab, Pakistan. A questionnaire-based survey was conducted to identify and to quantify variation in the prevalence of bovine tick infestation with respect to host (age, species, sex, and breed) and environmental (geographical area and climate) determinants. Multiple stage cluster random sampling was used and 3500 cattle and buffaloes from the two districts were selected. Prevalence of bovine tick infestation was significantly higher (OR=1.95; p<0.05) in cattle (1076/1475; 72.9%) than in buffaloes (957/2025; 47.3%). Hyalomma anatolicum anatolicum was the major tick species (33.5%; 1173/3500), followed by Rhipicephalus sanguineus (13%; 456/3500). The highest monthly prevalence in both the districts was found in July. Ticks were not found in Layyah from November to March and in Muzaffargarh from December to March. The average number of ticks was proportional to the prevalence of infestation. Also, tick infestation in a 7cmx7cm dewlap of the animal was proportional to that of the rest of body. Prevalence of tick infestation was associated (p<0.05) with district, host species and breed. In cattle, prevalence of tick infestation was associated (p<0.05) with age and sex of host. The results of this study provide better understanding of disease epidemiology in the study districts, which will help for planning of control strategies.


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