Health department sources said a 48 year-old woman from Puttur-Kasaragod border died of suspected dengue on June 13 at a hospital here.
According to District surveillance officer Dr B V Rajesh, this could be confirmed only after testing the serum samples to detect dengue anti-bodies, which would be done in two days.
The district had recorded two deaths and 85 dengue cases between January and July last year.
The control of the mosquito-borne disease would be difficult without people coming forward to check the breeding of mosquitoes in their premises, the sources said.