The number of Zika virus cases in Florida now tops 300, with 18 new cases reported Friday, a record for a single day.
The tally included one new case in Hillsborough County and a first in neighboring Manatee County, prompting Florida Department of Health officials to extend the declaration of a public health emergency to that county.
All of the cases are the result of travel to countries where Zika is more widespread, according to health officials.
The milestone comes on the day that the U.S. Centers for Disease Control and Prevention also reported the first documented instance of a female infecting a man through unprotected sexual intercourse. The case occurred in New York.
Zika is more frequently transmitted by mosquito bites. It has been linked to birth defects. Symptoms include rash, fever and joint pain, according to the CDC.
Efforts to get a Zika funding bill passed before Congress left for its summer recess failed earlier this week. The bill would have provided $1.1 billion to the National Institutes of Health, the U.S. State Department and the CDC to fight the virus.
State health officials have urged Floridians to drain standing water at least weekly to deny mosquitoes a breeding ground. Residents and visitors are also advised to use bug repellents when outdoors.