Which leishmaniasis presentation is typically fatal if untreated?

• A. Visceral
• B. Cutaneous
• C. Mucocutaneous
• D. Ocular

Answer: (A)

Visceral leishmaniasis is the systemic form. It invades internal organs—primarily the spleen, liver, and bone marrow—leading to a prolonged, whole-body illness with fever, weight loss, and enlargement of the spleen and liver. This systemic involvement causes blood-related problems (pancytopenia), increasing the risk of severe infections, bleeding, and organ failure. Without treatment, the disease progresses and is frequently fatal because the parasite load disrupts essential body functions across multiple organs.

In contrast, cutaneous leishmaniasis presents as skin ulcers that can heal on their own or with treatment and doesn't typically cause fatal organ failure. Mucocutaneous involvement can be disfiguring but is not usually rapidly lethal, and ocular involvement may lead to vision problems but not commonly death. Thus, the life-threatening, typically fatal progression when untreated points to the visceral form.