To date, brucellosis has been reported in 30 of the 32 provinces or autonomous regions of China, where northeast China and northwest China appear to be severely afflicted by brucellosis that affects humans and domestic animals. Brucellosis is effectively controlled in developed countries,, but it remains endemic in some developing countries and regions, especially in Middle East, Africa, Central America or Latin America and Asia including China, where the seroprevalence and incidence of human brucellosis are also increasing or even highly prevalent despite great efforts for the prevention and control of disease. Meanwhile, brucellosis causes significant economic losses to the animal industry worldwide because it usually results in abortion, infertility and decrease in milk and meat production. Further studies aimed at evaluating the risk factors associated with spreads of brucellosis in domestic animals unaddressed so far, and sufficient epidemiological data is important to the exploration and understanding of the prevalent status of brucellosis throughout the country and to disease control.īrucellosis is a highly contagious zoonotic disease caused by various species of the genus Brucella and poses a threat to public health over half a million cases of the disease are reported annually. The overall data in this meta-analysis demands comprehensive intervention measures and further surveillance to facilitate the control of brucellosis in livestock. The pooled prevalence of brucellosis is higher in goat flocks than in sheep flocks in China. The high prevalence of brucellosis in agricultural regions is suggestive of a shift of geographic distribution. Brucellosis is highly endemic in some local regions. The seroprevalence of brucellosis in sheep and goat flocks was higher in Eastern China, with 7.00% of positive rate, than that in any other region, especially Shandong province (18.70%). Therefore, we conducted this systematic review and meta-analysis to assess the overall status of brucellosis in sheep and goats in China in almost two decades. The seroprevalence of brucellosis in sheep and goat flocks in a national context is unavailable so far. An infectious reservoir constituted by domestic animals with brucellosis, especially ovine and caprine herds, poses a significant threat to public health. Brucellosis is an emerging and re-emerging disease in China since the 1990s. Brucellosis remains one of the most common zoonotic diseases globally, with more than half million human cases reported annually.
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