For every nine or 10 individual cases of dengue and chikungunya, two mosquito-borne viruses that closely resemble Zika and have popped up in Florida in recent years, there is just one cluster, health officials said.
According to the Tampa Bay Times, the Florida Health Department has declined to say when or what part of Pinellas the virus was contracted in.
The federal Centers for Disease Control and Prevention has advised pregnant women and their partners to avoid the Wynwood and Miami Beach areas in Miami-Dade.
Local mosquito transmission of Zika virus infection has been reported on the island of New Providence in The Bahamas (which includes the city of Nassau).
"There is a big concern, especially for women being pregnant and the possibility of having a child born with birth defects". By the end of June, the first Florida-grown cases were being reported.
County health departments are offering free Zika tests to pregnant women. There are also 120 tests still pending which could mean more cases of Zika in Pennsylvania.
Locally transmitted Zika cases in Florida could reach 400 by summer's end, projections released Tuesday by a team of American biostatisticians suggests. More details will be announced when the Pinellas County investigation concludes.
Scott has said he is anxious about the effect of Zika on local businesses and especially on tourism.
There is no vaccine or treatment for Zika, which is a close cousin of dengue and chikungunya and causes mild fever, rash and red eyes.
In Miami-Dade and Palm Beach, investigators have found that five cases were not spread through mosquitoes.
"In June, I voted to provide an additional $1.1 billion to fight and prevent Zika infections".
The virus can be transmitted by mosquitoes or through sex.
It's the first in the state outside the Miami area, but Scott said there wasn't enough evidence to date to declare a new zone of local transmission.