[Malaria surveillance in Tengchong County of Yunnan Province in 2013].

ABSTRACT

OBJECTIVE: To analyze the surveillance data of malaria in Tengchong County of Yunnan Province in 2013, so as to provide the evidence for carrying out the malaria elimination in the future. METHODS: The data of epidemic situation and surveillance of malaria in Tengchong County in 2013 were collected and analyzed for the prevalence state as well as and the monitoring indicators including the blood examination of fever patients of unknown origin, initiative detection of cases, under-reporting survey, sentinel surveillance and species and density investigation of Anopheles mosquitoes. RESULTS: Totally 138 malaria cases were reported in Tengchong County in 2013, among which 118 cases were infected with Plasmodium vivax and 20 cases with P. falciparum, and all the reported cases were imported. The completion rates of blood examinations, case reports and case investigations all reached 100%. A total of 57 cases were involved in initiative detection, but no positive cases were found. The twice under-reporting of malaria case surveys were conducted and 1 case had been under-reported. The sentinel surveillance was carried out both in the domestic and overseas sites at the same time to detect the suspected malaria cases, 172 cases were screened totally, and 15 ones were detected as positives. Totally 528 returnees were screened, and there were no positive case found. A. sinensis and A. liangshanensis were the dominant species, followed by A. minimus, A. maculatus and others. CONCLUSIONS: The malaria epidemic situation is stable in Tengchong County in 2013, and all the work in surveillance has been conducted successfully, but there still exist some difficulties in the process of malaria elimination. The local health departments should further strengthen the surveillance on imported cases and the management on migrant population as well as the capability building for health workers in malaria control in the future.