| (EJVP Vol 7 No 2; page 91)
Gross Pathology Case
Tissue from an anchovy (Engraulis encrasicolus)
QUESTIONS:
A: Name the condition
B: Name the causative agent
ANSWERS:
A: Peritoneal anisakiasis
B: Anisakis simplex (Nematode, Ascaroidea)
Comment:
Anisakis simplex are anisakid nematodes that have been implicated in human infections casued by the consumption of raw or undercooked seafood. The adults of A simplex are found in the stomachs of whales, dolphins and waterfowl. Fertilised eggs are excreted with the host's feces and develop into larvae that can hatch in sea water. These larvae are infective for copepods (minute crustaceans related to shrimp) and other small invertebrates. The larvae grow in the invertebrate and become infective for the next host, a fish or larger invertebrate host such as a squid. The larvae may penetrate through the digestive tract into the muscle of the second host.
Literature:
Smith, JW (1983) Anisakis simplex: morphology and morphometry of larvae of euphausiidis and fish, and a review of the life-history and ecology. J Helminthol. 57: 205-224
Submitted by Drs G Ghisleni, P Roccabianca, R Malandra and P Renon, Universita degli Studi di Milano and Sanitario Ittico di Milano Italy
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