Nelson Textbook of Pediatrics 22nd Edition | Caused by Chlamydia trachomatis serotypes A, B, Ba, C. Leading infectious cause of blindness worldwide. Clinical stages: follicular conjunctivitis (TF), intense inflammation (TI), conjunctival scarring (TS), trichiasis/entropion (TT), corneal opacity (CO). WHO SAFE strategy: Surgery for trichiasis, Antibiotics (azithromycin mass drug administration), Facial cleanliness, Environmental improvement (water, sanitation).
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