Due to the multiplication of mosquitoes and to noteworthy findings concerning the West Nile virus, mosquito control teams are to spray pesticide to avoid more cases of infections.

According to Kevin Smith, the Montgomery County Health Department's deputy director, aerial spraying is "a last resort. Our fear is that right now . . . we run a high risk of this jumping into the human population," he said.

The warm weather is propitious to spreading the virus in birds and mosquitoes. Besides infecting these populations, WNV has infected humans, this way determining the authorities to advise them to take adequate precautions in order to prevent mosquito bites.

The West Nile virus is as “an enzootic cycle established between birds and mosquitoes,” said the officials from the U.S. Centers for Disease Control and Prevention (CDC).

Six human cases of the disease have been reported this year in San Joaquin County, in addition to 100 other cases across the state, county and state public health departments said.

Health officials strongly advised people to immediately announce the authorities in case they see a dead bird and to stay away from it. Coming into contact with infected feathered animals can have deadly consequences.

Prime time for the transmitters of the virus is during the summer and into the warm autumn months before hard frost, between dusk and dawn. Generally, the first big freeze represents the end of mosquito season.