Which STD can present with the characteristic symptom of a 'chancre' at the site of infection?

Correct option is B

Ans: (b) Syphilis Sol. Syphilis is a sexually transmitted disease (STD) caused by the bacterium Treponema pallidum. One of the first symptoms of syphilis is a chancre, which is a painless ulcer that appears at the site of infection, typically genital, anal, or oral.
Explanation of each option:
· (a) Gonorrhea: Gonorrhea is an STD caused by Neisseria gonorrhoeae. It usually presents with symptoms such as painful urination and discharge, but not a chancre.
· (b) Syphilis: Correct answer. The characteristic symptom of syphilis in the primary stage is the appearance of a chancre at the site of infection, usually genital, anal, or oral.
· (c) Chlamydia: Chlamydia is caused by the bacterium Chlamydia trachomatis, and it typically presents with symptoms like genital discharge or pain during urination, but not a chancre.
· (d) HIV/AIDS: HIV (Human Immunodeficiency Virus) causes AIDS (Acquired Immunodeficiency Syndrome), but it does not cause a chancre. Instead, it affects the immune system and is characterized by the progressive loss of immune function.