SANTO DOMINGO, Dominican Republic (AP) — Health authorities in the Dominican Republic say an increase in malaria cases could be linked to the January 12 earthquake in neighbouring Haiti.

Dominican Medical Council epidemiologist Clemente Terrero said heavy rains could be a factor. But he also cited an influx of migrants from Haiti, where malaria is more prevalent. Thousands of Haitians crossed the border after the quake seeking work and shelter, and the incidence is highest near the border.

Deputy Health Minister Jose Rodriguez Aybar said yesterday that there have been 1,644 cases so far this year. That's about 200 more than the average for an entire year.

Malaria is caused by a parasite transmitted by mosquitoes. There's no vaccine, but it can be treated.