Microbiology C. trachomatis is a well-known cause of venereal disease. This organism is also implicated in which of the following? A Classic trachoma infection B Sexually transmitted cardiac disease in adults C Perinatal retinitis D Middle-ear infection in young children 💡 Explanation C. trachomatis is a well-known cause of venereal disease. This organism is also implicated in which of the following? ✓ Correct Answer: A. Classic trachoma infection