Recording main medical publication on Hygiene of Mollusca and Crustacea. Food-poisoning. Decomposing oysters, and shell-fish sickness by fungi. Catalogue of eatable Crustacea and Mollusca of Rio de Janeiro. Significance of Mollusca and Crustacea in the spread of diseases. Longevity of Vibrio comma, Eberthella typhosa, Salmonella schottmuelleri, Salmonella paratiphi. Escherichia coli in oysters, Microorganisms in marked oysters. Comparison old written papers with moderns publications on food-poisoning by Crustacea and Mollusca. Crustaceous - talassin, mitilotoxin, staphylococci enterotoxin in shellfishes products. Bacteriological examinations of shellfishes: Houston's, Klein's, and Eyre's methods. American Public Health Association Method for examination of oyters. Purification of Mollusca and Crustacea: bubling, floating, transplanting, chlorination. Purification of great land crab Cardisoma guanhumi and the mangrove crab Ucides cordatus.