Which of the following is a characteristic symptom of a Chlamydia infection?

A characteristic symptom of a Chlamydia infection is painful urination, also known as dysuria. This symptom arises due to inflammation of the urethra caused by the Chlamydia bacteria. The infection can lead to irritation and discomfort during urination, prompting individuals to seek medical attention.

While other symptoms may be associated with various sexually transmitted infections, they do not specifically highlight Chlamydia. For instance, genital warts are primarily associated with human papillomavirus (HPV) infections, while purulent discharge is more common in gonorrhea. Foul-smelling discharge could suggest bacterial vaginosis or trichomoniasis, rather than Chlamydia specifically. Therefore, painful urination stands out as a key symptom indicative of a Chlamydia infection.