NOT associated with preauricular lymphadenopathy?

• A. Chlamydial conjunctivitis
• B. Gonococcal conjunctivitis
• C. Acanthamoeba keratitis
• D. Parinaud's Oculoglandular syndrome

Answer: (C)

Preauricular lymphadenopathy occurs when the conjunctival surface is involved and the infection or inflammation drains to the regional lymph nodes in front of the ear. Conditions that affect the conjunctiva, such as chlamydial conjunctivitis and parinaud's oculoglandular syndrome, commonly show this nodal swelling, and gonococcal conjunctivitis can also provoke an inflammatory response that includes the preauricular region.

Acanthamoeba keratitis, on the other hand, is primarily a corneal infection often seen in contact lens wearers. It presents with severe eye pain, photophobia, and a characteristic corneal infiltrate, but it spares the conjunctival tissue to a degree and does not typically cause preauricular lymph node enlargement. So, it is not associated with preauricular lymphadenopathy.