Fresh and Frozen Shrimp: A Profile of Filth, Microbiological Contamination, and Decomposition

Authors: Gecan, John S.¹; Bandlert, Ruth¹; Staruszkiewicz, Walter F.²

Source: Journal of Food Protection®, Volume 57, Number 2, February 1994 , pp. 154-158(5)

Publisher: International Association for Food Protection

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Abstract:

A 2-year nationwide survey was conducted by the Food and Drug Administration to provide current information about filth, decomposition, and microbiological contamination of domestic and imported fresh and frozen shrimp. Whole or equivalent filth insects, mostly ants, were found in 14.4% of the samples. Of countries contributing at least 10 samples for filth analysis, India had the highest percentage positive for filth insects (45.5%); the United States had the lowest (6.3%). Filth insect fragments were present in 5.4% of the samples. Incidental insects were present in 6.3% of the samples, with flies the most commonly found. Of countries contributing at least 10 samples for filth analysis, India had the highest percentage positive for incidental insects (27.3%); Ecuador had the lowest (2.3%). Unidentified insect fragments were found in 33.3% of the samples; cockroach excreta pellets were present in 2.1%, rat or mouse hairs in 5.7%, and other striated animal hairs in 15.3%. Of countries contributing at least 10 samples for filth analysis, the Philippines had the highest percentages positive (30.0 and 50.0%) for rat or mouse hairs and other striated hairs, respectively; Malaysia was close behind with 23.1 and 46.2%. Samples from the United States had the lowest percentage positive for rat or mouse hairs (0.9%) and other striated hairs (7.2%). Listeria spp. were found in 6.8% of the samples; Salmonella spp. were found in 8.1%. Some level of decomposition was observed in 15.4% of the samples tested organoleptically.

Document Type: Research article

Affiliations: 1: Office of Plant and Dairy Foods and Beverages, Division of Microanalytical Evaluations, Food and Drug Administration, Washington, DC 20204 2: Office of Seafood, Division of Science and Applied Technology, Food and Drug Administration, Washington, DC 20204