Epidemiology and Infection

Other infections

Risk factors associated with anthrax in cattle on smallholdings

P. K. BISWASa1 c1, M. Z. ISLAMa1, S. K. SHILa2, R. K. CHAKRABORTYa3, S. S. U. AHMEDa4 and J. P. CHRISTENSENa5

a1 Department of Microbiology, Chittagong Veterinary and Animal Sciences University, Chittagong, Bangladesh

a2 Department of Anatomy and Histology, Chittagong Veterinary and Animal Sciences University, Chittagong, Bangladesh

a3 Department of Livestock Services, Dhaka, Bangladesh

a4 Department of Medicine and Surgery, Chittagong Veterinary and Animal Sciences University, Chittagong, Bangladesh

a5 Department of Veterinary Disease Biology, Faculty of Life Sciences, Copenhagen University, Copenhagen, Denmark

SUMMARY

Unprecedented high rates of anthrax outbreaks have been observed recently in cattle and humans in Bangladesh, with 607 human cases in 2010. By enrolling 15 case and 15 control cattle smallholdings in the spatial zone in July–September 2010, we conducted a case-control study, data of which were analysed by matched-pair analysis and multivariable conditional logistic regression. Feeding animals with uprooted and unwashed grass [odds ratio (OR) 41·2, 95% confidence interval (CI) 3·7–458·8, P=0·003], and feeding water hyacinth (Eichhornia crassipes) (OR 22·2, 95% CI 1·2–418·7, P=0·039) were independent risk factors for anthrax in cattle.

(Accepted October 31 2011)

(Online publication November 29 2011)

Correspondence:

c1 Author for correspondence: Dr P. K. Biswas, Department of Microbiology, Chittagong Veterinary and Animal Sciences University, Chittagong, Bangladesh. (Email: biswaspk2000@yahoo.com)

Footnotes

† These authors contributed equally to this work.

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