A parasitic disease caused by different species of the genus <i>Leishmania</i>, transmitted through the bite of hematophagous female phlebotomine sand flies. The clinical spectrum ranges from asymptomatic to clinically overt disease which can remain localized to the skin or disseminate to the upper oral and respiratory mucous membranes or throughout the reticulo-endothelial system. Three main clinical syndromes have been described: visceral (or Kala-Azar; with fever, weight loss, hepatosplenomegaly), cutaneous, and mucocutaneous leishmaniasis (cutaneous or mucocutaneous ulceration).

Molluscum contagiosum is a cutaneous viral infection that is commonly observed in both healthy and immunocompromised children. The infection is caused by a member of the Poxviridae family, the molluscum contagiosum virus. Molluscum contagiosum presents as single or multiple small white or flesh-colored papules that typically have a central umbilication. The central umbilication may be difficult to observe in young children and, instead, may bear an appearance similar to an acneiform eruption. The lesions vary in size (from 1 mm to 1 cm in diameter) and are painless, although a subset of patients report pruritus in the area of infection. On average, 11-20 papules appear on the body during the course of infection and generally remains a self-limiting disease. However, in immunosuppressed patients, molluscum contagiosum can be a severe infection with hundreds of lesions developing on the body. Extensive eruption is indicative of an advanced immunodeficiency state.