A patient has symptoms of rectal bleeding and vague anal discomfort. Proctoscopy reveals dilated veins in the mucous membrane of anus Which condition is described?

A. They bind to infected cells and are activated by cytokines:

This describes cytotoxic T cells (CD8+ cells), which kill infected cells, not helper T cells.

B. They activate B cells and produce small cells called cytokines:

Helper T cells (CD4+ cells) stimulate B cells to produce antibodies and secrete cytokines to coordinate the immune response.

C. They destroy infected cells by producing proteins targeting cell membranes:

Again, this is the role of cytotoxic T cells, not helper T cells.

D. They are non-responsive during active infections:

Helper T cells are highly active during infections, directing other immune cells. They are not non-responsive.

A. Erectile dysfunction:

Erectile dysfunction is not an STI; it is a sexual health condition often related to physical or psychological issues.

B. Chancroid:

Chancroid is a bacterial STI caused by Haemophilus ducreyi, characterized by painful ulcers on the genital area.

C. Epispadias:

Epispadias is a congenital birth defect where the urethra does not develop properly. It is not an STI.

D. Orchitis:

Orchitis is inflammation of the testicles, often caused by infections (like mumps or other viral infections), but not typically classified as an STI.