To the Editor.—A recent case of one of our patients who presented with a septicemia caused by Plesiomonas shigelloïdes 15 days after the consumption of raw mussels prompted us to add P shigelloïdes to the list of the bacterial infections associated with fish and shellfish consumption, published in the August 1989 issue of the Archives.1
Indeed, P shigelloïdes has been recognized as the cause of isolated cases and outbreaks of gastroenteritis, often severe, after ingestion of seafood.2-6 Cases of extraintestinal illness have also been caused by P shigelloïdes: meningitis and septicemia in neonates, sometimes associated with the presence of P shigelloïdes in the feces of the mother, 7,8 probably secondary to seafood consumption, 8 and septicemia in adults, also sometimes preceded by seafood consumption.9 These extraintestinal infections are rarely reported, but are severe and often fatal.2
Consequently, it seems to us that P shigelloïdes, a