Two New Jersey horses were euthanized last week after contracting mosquito-borne illnesses, state agricultural officials said.

Yesterday, two elderly women were added to the list of confirmed cases of the mosquito-borne illness.

The 30th and 31st cases this year of West Nile virus, the mosquito-borne illness, were reported by state officials last week.

Outbreaks of the mosquito-borne illness, dengue fever, occur from time to time.

Drug resistance has undercut effective treatment of malaria, the mosquito-borne illness that kills 1.1 million people a year.

Large areas of standing water caused by flooding also contribute to mosquito-borne illnesses.

Asmara, because of its altitude, is generally considered free of these mosquito-borne illnesses.

Large areas of standing water caused by flooding lead to infection, as well as contributing to mosquito-borne illnesses.

State officials yesterday reported the 30th and 31st cases of West Nile virus, the mosquito-borne illness, this year.

Recently, small numbers of the mosquito-borne illness have been reported in Key West, Fla.