Gnathostomiasis — photos

Symptoms and syndromes in photos

Main » Infectious diseases » Infections Acquired through the Gastro-intestinal Tract » Gnathostomiasis

Head of adult Gnathostoma spinigerum.

Photo 1.  Head of adult Gnathostoma spinigerum. The adult is about two to three cm long and usually lives in the stomach of dogs, cats and wild felines. It is found throughout Southeast Asia. There are two intermediate hosts. Man acquires infection by eating fermented fish, a delicacy in Thailand, or any other form of raw fish. The parasite cannot mature in man, but migrates causing cutaneous and visceral larva migrans. (x30)

Second stage larva in Cyclops.

Photo 2.  Second stage larva in Cyclops. Larvae hatching from eggs passed with faeces into fresh water, infect Cyclops water fleas, and later fish that eat the Cyclops. Here the third stage larva develops. (x 90)

Periorbital larva migrans.

Photo 3.  Periorbital larva migrans. One of the charac­teristic clinical features is a migrating subcutaneous swelling associated with boring pain and eosino­philia. Third stage larvae may be recovered surgically from swellings in suitable locations. Cerebral lesions with focal signs are not uncommon in Thailand.

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