ST. CLOUD, Fla. -- A Florida Highway Patrol trooper is doing fine after collapsing on the Florida Turnpike, following a routine traffic stop Friday morning.

It happened south of St. Cloud near mile marker 233. Trooper Albert Renard had stopped a black Nissan Maxima, driven by Alaa Ishaq Eljallad of Coconut Creek. After writing a ticket, the motorist took off and the trooper felt dizzy and collapsed, Florida Highway Patrol spokeswoman Kim Miller said.

Eljallad was later stopped in Hamilton County, about 150 miles to the north, but nothing illegal was found in the car. After Eljallad was allowed to continue, it was found that his visa had expired. The Georgia State Patrol has been asked to find and hold the man for the Immigration and Naturalization Service.

Troopers feared at first that the the man might have been exposed to some sort of chemical.

The northbound lanes of the turnpike were closed while the trooper was airlifted to Orlando Regional Medical Center, and a hazmat team conducted an investigation, Miller said.

The trooper was decontaminated at the hospital as a precaution.

The hazmat team found no chemical contamination on the turnpike, so the road was reopened to traffic.

Doctors later said that there was no evidence of chemical exposure, and the trooper's dizzy spell was not related to the traffic stop.