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Epidemiological characteristics of Plasmodium malariae malaria in China: a malaria that should not be neglected post elimination
Infectious Diseases of Poverty ( IF 8.1 ) Pub Date : 2023-11-20 , DOI: 10.1186/s40249-023-01156-2 Li Zhang 1 , Bo-Yu Yi 1 , Shui-Sen Zhou 1 , Zhi-Gui Xia 1 , Jian-Hai Yin 1
Infectious Diseases of Poverty ( IF 8.1 ) Pub Date : 2023-11-20 , DOI: 10.1186/s40249-023-01156-2 Li Zhang 1 , Bo-Yu Yi 1 , Shui-Sen Zhou 1 , Zhi-Gui Xia 1 , Jian-Hai Yin 1
Affiliation
Plasmodium malariae was always neglected compared with P. falciparum and P. vivax. In the present study, we aimed to describe the epidemiology of reported cases infected with P. malariae in the past decade to raise awareness of the potential threat of this malaria parasite in China. Individual data of malaria cases infected with P. malariae reported in China in the past decade were collected via the China Information System for Disease Control and Prevention and Parasitic Diseases Information Reporting Management System, to explore their epidemiological characteristics. Pearson Chi-square tests or Fisher’s Exact Test was used in the statistical analysis. From 2013 to 2022, a total of 581 P. malariae cases were reported in China, and mainly concentrated in 20–59 years old group (P < 0.001), and there was no significant trend in the number of cases reported per month. Moreover, four kinds of P. malariae cases were classified, including 567 imported cases from 41 countries in 8 regions and distributed in 27 provinces (autonomous regions, municipalities) in China, six indigenous cases in a small outbreak in Hainan, seven recurrent cases in Guangdong and Shanghai, and one induced case in Shanghai, respectively. In addition, only 379 cases (65.2%) were diagnosed as malaria on the first visit (P < 0.001), and 413 cases (71.1%) were further confirmed as P. malariae cases (P = 0.002). Meanwhile, most cases sought healthcare first in the health facilities at the county and prefectural levels, but only 76.7% (161/210) and 73.7% (146/198) cases were diagnosed as malaria, and the accuracy of confirmed diagnosis as malaria cases infected with P. malariae was only 77.2% (156/202) and 69.9% (167/239) in these health facilities respectively. Even though malaria cases infected with P. malariae didn’t account for a high proportion of reported malaria cases nationwide, the threat posed by widely distributed imported cases, a small number of indigenous cases, recurrent cases and induced case cannot be ignored in China. Therefore, it is necessary to raise awareness and improve the surveillance and response to the non-falciparum species such as P. malariae, and prevent the reestablishment of malaria transmission after elimination.
更新日期：2023-11-20
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