Example:


"Filariasis


Wuchereria bancrofti is the most common filarial parasite in humans; there are an estimated 82 million infected individuals and more than 900 million people at risk of infection. It is worldwide in distribution but occurs mainly in the tropics.Wuchereria bancrofti is exclusively a human parasite with no known animal reservoir. In endemic areas exposure begins early in childhood and continues throughout life."
(http://home.coqui.net/myrna/fila.htm)

Good luck!