The Health Department's Dr. Don Weiss said Friday that agency doctors and investigators were dispatched to the private St. Francis Preparatory School the previous day after students reported fever, sore throat, cough, aches and pains. No one has been hospitalized.
The handful of sick students who remained at the school were tested for a variety of flu strains.
Swine flu has sickened at least eight people in Texas and California and has affected more than 1,000 people in Mexico.
Results could take several days.