USMLE · Question #585
A 2-week-old male is brought to the physician by his mother due to labored breathing for the past day. She had a home delivery which she reports as uneventful but say she developed "pink-eye" after…
The correct answer is B. Chlamydia trachomatis. This neonate's clinical findings are consistent with neonatal atypical pneumonia secondary to Chlamydia trachomatis types D-K. Transmission occurs from the mother's vaginal canal to the neonate at birth. A classic presentation includes neonatal conjunctivitis 1-2 weeks after…
Question
Options
- AAscaris lumbricoides
- BChlamydia trachomatis
- CHaemophilus influenza
- DMycoplasma pneumoniae
- ENeisseria gonorrhea
How the community answered
(29 responses)- A3% (1)
- B69% (20)
- C7% (2)
- D17% (5)
- E3% (1)
Explanation
This neonate's clinical findings are consistent with neonatal atypical pneumonia secondary to Chlamydia trachomatis types D-K. Transmission occurs from the mother's vaginal canal to the neonate at birth. A classic presentation includes neonatal conjunctivitis 1-2 weeks after birth, clinical signs of pneumonia, eosinophilia and a staccato cough. A chest x-ray may show scattered infiltrates and hyperinflation of the lungs. Neonatal conjunctivitis can occur if prophylactic erythromycin eye drops are not given immediately after delivery. Gonococcal conjunctivitis typically occurs 2-7 days after birth, while chlamydial conjunctivitis has a later onset than gonococcal conjunctivitis with an incubation period of 5-14 days.
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