Cuban health officials warned Thursday about an increased number of mosquitoes in the country's urban areas that can spread diseases such as dengue fever.
The communist island's 23 largest municipalities are affected by an uptick of the Aedes aegypti mosquito, including the capital Havana, state television reported.
"We are relying on a surveillance system that few other countries in the world have succeeded to put in place," Juan Vasquez, a senior health ministry official told the broadcaster, urging the population to cooperate with authorities.
Authorities in Cuba have not released any numbers on confirmed cases of dengue fever or other diseases transmitted by the mosquito.
The Pan American Health Organization recently warned about the resurgence of dengue cases in Central America and the Caribbean during the second half of 2012.
It said more than a million cases of dengue fever and 719 related deaths were recorded in the region in 2011.