Abstract:

The individual malaria case investigation forms in 31 provinces/municipalities/autonomous regions (excluding Taiwan, Hong Kong and Macao) and Xinjiang Production and Construction Corps of China in 2023 were collected and sorted from “The Information System for Infectious Disease Surveillance”. The epidemiological characteristics were analyzed. In 2023, 2 488 malaria cases were reported, showing an increase of 194.4% compared to 2022 (845). Among them, there were 2 487 imported cases, 1 case of blood transfusion infection; 1 561 falciparum malaria cases (62.7%, 1 561/2 488), 615 vivax malaria (24.7%, 615/2 488), 234 ovale malaria (9.4%, 234/2 488), 66 malariae malaria (2.7%, 66/2 488) and 12 cases with mixed-infection (0.5%, 12/2 488). In the reported, 2 313 cases were of Chinese nationality (93.0%, 2 313/2 488) and 175 cases foreign nationality (7.0%, 175/2 488); the male-to-female ratio was 11.6∶1; the highest number of cases (29.1%, 725/2 488) was seen at the age group of 30-39 years showed. The malaria cases were reported from all the 31 provinces/municipalities/autonomous regions and Xinjiang Production and Construction Corps, with the top 5 provinces of Yunnan (398 cases), Henan (234 cases), Guangxi (195 cases), Shandong (178 cases) and Guangdong (174 cases) accumulately, a total of 1 179 cases (47.4%, 1 179/2 488) reported. Of the reported, 85 were severe cases (3.4%, 85/2 488) and 12 deaths (0.5%, 12/2 488). Although no local transmitted primary malaria cases have been reported in China for seven consecutive years, the risk of imported cases and re-transmission. It is imperative to continuousely strengthen the surveillance and response, find the cases timely and deliver standardized treatment, so as to reduce severe cases and death, preventing local re-transmission.

Key words: Malaria, Epidemiological characteristics, China