Abortion and various associated risk factors in dairy cow and sheep in Ili, China

BioRxiv : the Preprint Server for Biology
X. DengChuangfu chen


We studied livestock abortion and various associated risk factors in the Ili region of northwest China. Livestock abortion prevalence was estimated and correlated with infections (Brucellosis, Salmonellosis, Mycoplasma and Chlamydia seropositivity) and management (farming type and contact with other herds/flocks) risk factors. The prevalence of cow and sheep abortion induced by Brucella was 76.8% ( P <0.0001) and 84.1% ( P <0.0001), and Mycoplasma caused an estimated 15.5% ( P =0.025) and 17.6% ( P <0.001) abortions, respectively. Abortion-related risk factors included mixed farming (cow P =0.001, sheep P <0.001), contact with other flocks (cow P =0.007, sheep P =0.003), brucellosis positivity (cow P <0.001, sheep P <0.001) and Mycoplasma positivity (cow P =0.031, sheep P <0.001). A total of 2996 serum samples (1402 cow, 1594 sheep) were identified by RBPT (Rose Bengal Plate Test), and they showed the seroprevalence of brucellosis in X county was cow 7.1%, sheep 9.1%; in H county was cow 11.7%, sheep 10.7%; and in Q county was cow 4.2%, sheep 9.1%. The seroprevalence of Mycoplasma in X county was cow 3.4%, sheep 7.9%; in H county was cow 5.3%, sheep 9.9%; and in Q county was cow 2.1%, sheep 4.3%. A total of 54 samples, includin...Continue Reading

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