Abstract:

Objective To analyze the imported malaria situation in Gansu Province during 2013-2015, in order to provide reference for improving elimination strategies and measures. Methods Data on malaria control and reported malaria cases during 2013-2015 were collected, and analysis was made on prevalence and regional distribution of malaria cases, species of plasmodium, diagnosis of patients, and sources of infection. Results Ninety-seven cases were reported in Gansu Province during 2013-2015, consisting of 52 cases of vivax malaria (53.6%). 42 falciparum malaria (43.3%, 42/97), and one for each of quartan malaria, ovale malaria and mixed infection (3.1%). All were imported, with a source dominance in southeast Asia (60.8%, 59/97), then the Africa (39.2%, 38/97). Most of the cases were young and middle-aged adults of 21-50 years who working overseas (93.8%, 91/97), and most of the cases occurred from April to August (51.6%, 50/97). The cases mainly distributed in Wenxian (50.5%, 49/97), and Lanzhou (15.5%, 15/97). The median of interval from onset to diagnosis was 4 days. The cases were mainly reported by clinical medical institutions (91.8%, 89/97). Only 8.2% (8/97) were reported by disease control institutions. No indigenous cases were reported in the period. Conclusions The reported malaria cases are predominated by vivax malaria and falciparum malaria imported from the southeast Asia and Africa.

Key words: Malaria, Imported case, Epidemic-ology, Gansu Province