Abstract:

The malaria epidemic data in Baoshan City during 2013-2019 were collected through the Information Management System for the Prevention and Treatment of Parasitic Disease, the Infectious Disease Surveillance Reporting and Management System of the Chinese Center for Disease Control and Prevention. Database was established using Microsoft Excel 2007 for statistical analysis. A total of 880 cases of malaria were reported during 2013-2019 in Baoshan City, and 846 (96.1%) cases were imported from abroad. No indigenous malaria cases were reported after September, 2013. The numbers of imported malaria cases in Baoshan during 2013-2019 were 181, 198, 248, 104, 55, 28 and 32, respectively. Among the imported malaria cases, 765 (90.4%) were vivax malaria, 78 (9.2%) falciparum malaria, and 3 (0.4%) quartan malaria. The number of cases was highest in Tengchong City (549 cases, 64.9%), and lowest in Changning County (12 cases, 1.42%). The peak of case number occurred from April to July (540 cases, 63.8%), with the highest in May (183 cases, 21.6%). Of all imported cases, 759 were male (89.7%) and 802 were farmers (94.8%), and 704 cases were young adults aged 20-49 years (83.2%). The main source of infection was from Southeast Asia (841 cases, 99.4%), with Myanmar accounting for the largest number of imported cases (810 cases, 95.7%). All of the 846 imported cases were laboratory-confirmed, the longest time span from onset to diagnosis was 58 days, and 754 (89.1%) cases were confirmed within 7 days. The centers for disease control and prevention reported 279 cases (33.0%), township hospitals reported 265 cases (31.3%), general hospitals reported 204 cases (24.1%), and private hospitals and others reported 98 cases (11.6%).

Key words: Malaria, Imported malaria, Epidemic characteristics, Baoshan