Analysis of epidemic situation of malaria in Longlin Various Nationalities Autonomous County in Guangxi from 1951 to 2014

Abstract

To analyze the data of epidemic situation of malaria in Longlin Various Nationalities Autonomous County, Guangxi Zhuang Autonomous Region, China from 1951 to 2014 and discuss the distribution characteristics and epidemic law, so as to provide the evidences for developing the prevention and control strategies of the disease. The data about the epidemic situation of malaria in Longlin Various Nationalities Autonomous County were collected and analyzed statistically with Excel 2007. Totally 93 460 malaria cases were reported from 1951 to 2014 in the county. There were two morbidity peaks of malaria during this period, namely 1950s and 1970s, and the annual average incidence rates were 3 237.94/100 000 and 1 572.12/100 000, respectively, but it began to flatten after 1980s. Before 2000, the local cases were the main type, however, there were no endogenous cases since 2008. In 1950s, falciparum malaria was the main type of the disease, and the cases with falciparum malaria, tertian malaria and quartan malaria were accounted for 45.01% (2 392/5 314), 33.72% (1 792/5 314) and 19.55% (1 039/5 314), respectively; while in 1960s, the proportion of cases with tertian malaria increased, that of the cases with quartan malaria decreased, and there were no quartan malaria cases reported since 1980s. There were imported malaria cases reported since 1990s, and a total of 51 cases were found in this period, among which, 50 cases (98.04%) were tertian malaria, and the main infection sources were the cases from epidemic areas in other provinces of China. After 2000, the imported malaria cases with falciparum malaria increased, with a proportion of 60.00% (21/35), and the infection sources were mainly from Africa and Southeast Asia. The local endemic of malaria in Longlin Various Nationalities Autonomous County has been effectively controlled, but the situation of imported malaria is still severe in this county. Therefore, strengthening the surveillance of floating population, especially the workers backing from overseas, is still the key of malaria prevention and control in the future.