Emerging Infectious Diseases

Neglected Tropical Diseases

Neglected tropical diseases (NTDs) are a diverse group of tropical infections that are common in low-income populations in developing regions of Africa, Asia, and the Americas. They are caused by a variety of pathogens, such as viruses, bacteria, protozoa, and parasitic worms (helminths). While NTDs rarely lead to death, they can cause significant disability that persists for a lifetime, including fatigue, blindness, and disfigurement. NTDs are widespread in the world's poorest regions, where water safety, sanitation, and access to health care are substandard.