If a person has penicillin allergy, is it safe to eat roquefort, blue, or gorgonzola cheese? does the mold in the cheese make penicillin?

Should be fine: Penicillin was traditionally isolated from specific molds, but the concentration is very low. I am unaware of this ever being a problem, even in the case of severe allergy.

Great question: Reactions to penicillin in foods eaten by persons allergic to penicillin are rare - perhaps 10 cases in past 25 years worldwide. Cases involve eating meat from an animal given penicillin before slaughtering. I found no cases attributed to the cheeses listed. They use a different species of the genus penicillium to add flavor. Also many persons who think they are penicillin allergic are not.