Figure 1.

Malaria incidence for Trat, 2011–2015. (a) A trend of malaria incidence showing annually reported malarial cases with the types of Plasmodium infection between 2011 and 2015 at the district level of Trat Province. The local Thai populations were more likely to be affected by malaria than foreign migrant workers. Dashed line is shown for overall malarial case numbers. (b) Annual malaria incidence mostly reported by two following districts, Bo Rai and Mueang Trat, as compared to overall malarial case numbers. FMWs: foreign migrant workers; PF: Plasmodium falciparum; PV: Plasmodium vivax; PM: Plasmodium malariae; PO: Plasmodium ovale; UN: unknown malarial parasites. Data were modified from the Bureau of Vector-Borne Diseases, Department of Disease Control, Ministry of Public Health, Thailand.