Chiang Mai Public Health Office deputy director Dr Surasingha Wisarutrat said 10,017 persons have been diagnosed with dengue fever since January, with 9,320 of the afflicted being Thais while 697 were migrant workers from neighbouring countries.
Eight have died from the disease, he said, adding that the most affected was Mae Ai district, followed by Mae Taeng and Doi Tao districts.
Dr Surasingha said the Chiang Mai Health Office has urged all communities in the province to help implement the pro-active measures to prevent the spread of the disease.
He said that although the dengue fever epidemic has declined, the effort to destroy the larva breeding sites should continue.
The public health office will conduct a Big Cleaning Day in villages and communities beginning in September to eradicate the mosquito larvae.