Repeated USMLE Questions Step 2 CK- 329

A 9 month old girl is brought by her mother to the clinic for routine examination. Her mother noticed yellow discoloration of the girl's teeth. The physician asks the mother if she took any medications during her pregnancy. She remembers taking an antibiotic for bronchitis.

Which of these antibiotics is the most likely responsible for this condition?

A- Chloramphenicol

B- Cephalexin

C- Tetracycline

D- Ampicillin

E- Erythromycin

Answer







Tetracycline is the most likely antibiotic responsible for the yellow discoloration of teeth in infants when mothers take it during pregnancy. Tetracycline is contraindicated in pregnancy and early childhood.

The correct answer is C