Answer
Conjuctivitis: Chlamydia trachomatis or streptococcus pneumonia
Trachoma: Chlamydia trachomatis
Keratitis: Herpes simplex virus
River blindness: Onchocerca volvulus
Work Step by Step
The possible causative agents are:
Conjuctivitis: Chlamydia trachomatis or streptococcus pneumonia
Trachoma: Chlamydia trachomatis
Keratitis: Herpes simplex virus
River blindness: Onchocerca volvulus