What is the causative agent of guinea worm infection?

Guinea worm infection is specifically caused by Dracunculus medinensis, which is a parasitic worm. The lifecycle of this parasite begins when a person drinks water that contains the larval form of Dracunculus medinensis, which is released from the intermediate host, typically a freshwater copepod. Once ingested, the larvae mature into adults in the human body, eventually causing a painful blister on the skin as they migrate to the surface.

Recognizing the correct causative agent is crucial for public health and prevention strategies because understanding the life cycle and transmission routes allows for effective interventions, such as improving water quality and access to safe drinking water, which are key components in eliminating the disease. The other options listed represent different parasites responsible for other infections, emphasizing the importance of correctly identifying organisms linked to specific diseases for effective diagnosis and treatment.