By The Associated Press

CHICAGO - A Chicago fertility doctor says he has addressed concerns in a federal warning letter about his clinic's failure to meet standards for screening egg donors for sexually transmitted diseases.

The Food and Drug Administration's letter to Dr. Martin Balin was posted on the agency's website Tuesday night. FDA spokeswoman Lisa Misevicz says nobody got sick, but the FDA's goal is to ``prevent anyone from becoming sick in the future.''

The FDA routinely inspects clinics that deal with human tissue such as donated eggs, which can be used to help infertile couples conceive.

The letter says Balin's office failed to meet screening standards for chlamydia, gonorrhea and HIV.

Balin says his patients were always safe. He says a lab ran the wrong HIV test, but another test was used.