<prompt> The following is responsible for causing ophthalmia neonatorum on 5-7th day after bih: March 2013 bChemicalHerpes Simplex Virus IINeisseria gonorrhoeaChlamydia trachomatis  <response>: Ans. B i.e. Herpes simplex virus II Ophthalmia neonatorum Time frame of signs symptoms following bih play an impoant role in determining the most likely etiology and subsequent proper diagnosis and treatment Within 48 hours: Chemical conjunctivitis Typically presents within first 24 hours following bih Niesseria gonorrhoe 48-72 hours: Staph. aureus, Strepto. Hemolyticus 5-7 days: HSV-II More than 1 week: C. trachomatis D-K 