the current incidence of ampicillin-resistant h influenzae responsible for om is low but if the patient does not respond to initial therapy with ampicillin or amoxicillin , infection with a resistant strain of h influenzae should be considered and a change in therapy to include a sulfonamide , trimethoprim-sulfamethoxazole or cefaclor is appropriate .
C0029882
om
C0007537
cefaclor