Analysis of Epidemiological Changes and Prevention Effects for Malaria in Weifang, Shandong Province, China from 1957 to 2017

Background: we aimed to conduct a retrospective analysis of the epidemiological changes and prevention effects for malaria in weifang, shandong peninsula, china from 1957 to 2017. methods: the malaria data from a web-based reporting system were analyzed to explore malaria epidemiological characteristics and prevention effects in weifang. results: overall, 1, 704, 890 malaria cases were reported in weifang from 1957 to 2017, of which two major malaria epidemics occurred in 1961 (827.28/10, 000) and 1971 (366.14/10, 000). prior to 1997, all malaria patients (1, 704, 829) were infected with plasmodium vivax (p. vivax). after 2007, the cases of plasmodium falciparum (p. falciparum) showed an upward trend (76.8%). the reported cases after the 21st century were mainly imported cases, and the last indigenous case was a patient that infected with p. vivax in 2006. overall, 36 imported cases were reported from 2010 to 2017, of which 88.9% were acquired in africa. except for one 32-year-old woman, the rest were male (97.2%), in which laborers and farmers represented the vast majority (66.6%). from 1987 to 2017, there were 1, 224, 474 cases of fever with blood tests, and the average blood test rate was 4.9%. from 1957 to 2017, a total of 1, 704, 890 malaria patients were treated, 96 cases were treated during resting phase from 1987 to 2017. conclusion: weifang should continue to strengthen the management of the migrant population, making blood tests for fever patients and patient treatment as important means of malaria control and monitoring.