Objective: To understand the changes of transmission factors of schistosomiasis after the control strategy of replacing bovine with machine was implemented in the lake region, so as to provide the evidence for long-effective management in marshlands.
Methods: Two villages, which had carried out the control measure of replacing bovine with machine, were selected as observed villages. The data of endemic situation before and after the replacement were collected and analyzed. The species, activities, and stool distributions of infectious resources were surveyed.
Results: After the replacement was implemented in 2005, the densities of infected Oncomelania snails gradually decreased in the marshlands from 2006 to 2008; in 2009 and 2010, the densities of infected snails were both zero. The positive rates of stool examinations of residents in the villages decreased from 11.35% in 2004 to 0 in 2009 and 2010. There was still bovine and pig grazing on most of the marshlands, and 41 wild stools were examined with the negative results.
Conclusion: After replacing bovine with machine is implemented, the marshlands are cleaned continuously, but there are still a few livestock on the marshlands which need to be managed.
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