The mayor of Dallas declared a state of emergency in the ninth largest U.S. city on Wednesday to combat the spread of West Nile virus infections, which have been more prevalent than usual in Texas and other states this year.
There have been more cases of West Nile virus reported so far this year than any year since the disease was first detected in the United States in 1999, the Centers for Disease Control said on its website.
Nearly half of the 693 human cases of the mosquito-borne West Nile virus infections reported this year to the CDC have been in Texas, along with 14 of the 26 deaths confirmed by the federal agency as of Tuesday.
The Texas health department said the number of cases of West Nile in the state had reached 465 and there had been 17 deaths. There is a lag in the CDC confirming cases and deaths.