Analysis on Malaria Situation in Shaanxi Province during 2005-2014

Objective: To analyze the malaria situation in Shaanxi Province during 2005-2014, in the aim of providing reference for improving malaria elimination strategies and measures. Methods: Data on malaria control and malaria epidemic reports during 2005-2014 were collected, and analysis was made on prevalence and regional distribution of malaria, species of plasmodium, diagnosis of patients, and sources of imported malaria. Results: Four hundred and fifty three cases of malaria were reported in Shaanxi Province during 2005-2014, consisting of 73 local cases （16.1%） and 380 imported cases （83.9%） of which 141 were falciparum malaria （37.1%, 141/380）. Three patients died and they all were imported cases of falciparum malaria. No indigenous infection had been reported since 2011. Most of the cases were laboratory-confirmed（71.5%, 324/453）. The falciparum malaria cases accounted for 31.1%（141/453） of all the cases, and they all were imported cases. No cases of quartan malaria and ovale malaria were reported. The 73 indigenous cases distributed in 25 districts (counties) of 7 cities, including 3 cities in South Shaanxi (Shangluo, Hanzhong, Ankang)（61.6%, 45/73） and four cities in Central Shaanxi (Xi′an, Weinan, Xianyang, Baoji) (38.4%, 28/73）. The imported cases showed an increasing trend from 24 in 2005 to 59 in 2014. The 380 imported cases were mainly from over 20 countries in Africa （72.6%, 276/380）, with top sources of Angola （64 cases）, Cameroon （26）, Ghana （24）, and Equatorial Guinea （23） accounting for 36.0% （ 137/380）. The median of interval from onset to diagnosis was 5 d. The cases were mainly reported by clinical medical institutions （87.6%, 397/453）, only 7.5% （34/453） were reported by disease control institutions. Conclusion: No indigenous cases have been reported since 2011, but the imported malaria cases show a trend of increase with a major source of Africa.