<prompt> Which of the following is not given in ophthalmia neonatorumErythromycin locallyTetracycline 1Penicillin locallySilver nitrate  <response>: Prophylactic use of 1 silver nitrate Credes method is obsolete now.Erythromycin and tetracycline ointment are frequently used for prophylaxis. Penicillin is used for treatment of sensitive strains of gonococci. 