Gnathostoma Infections

Gnathostomiasis is a parasitic infection caused by the larvae of the genus Gnathostoma. These parasitic worms typically infect fish and other intermediate hosts, with humans acting as accidental hosts. The primary mode of transmission to humans is through the consumption of raw or undercooked freshwater fish, amphibians, or reptiles containing infective larvae. Once ingested, the larvae migrate through the gastrointestinal tract, penetrate the intestinal wall, and can travel to various tissues, causing a range of symptoms. Clinical manifestations of gnathostomiasis vary depending on the migration of larvae. Early symptoms may include migratory, subcutaneous swellings known as "creeping eruptions" or "larva migrans," as the parasites move beneath the skin. This phenomenon is accompanied by itching, redness, and discomfort. In more severe cases, larvae may invade internal organs, leading to visceral gnathostomiasis. Symptoms can include abdominal pain, vomiting, fever, and neurological complications if larvae reach the central nervous system. Diagnosis of gnathostomiasis often relies on clinical presentation, travel history, and laboratory tests. Treatment typically involves anthelminthic drugs such as albendazole or ivermectin, along with supportive care for complications.