Listeria in Seafoods: A Review

Area of Science:

• Food safety
• Microbiology
• Seafood science

Background:

• Listeria is an environmental contaminant found in aquatic environments and seafood.
• Listeria, including Listeria monocytogenes, contaminates various processed seafood products.
• Listeria monocytogenes exhibits notable heat resistance.

Purpose of the Study:

• To assess the prevalence and heat resistance of Listeria in seafood.
• To evaluate the efficacy of commercial pasteurization on Listeria inactivation in crab meat.

Main Methods:

• Isolation of Listeria from marine and freshwater environments and seafood products.
• Heat survival studies on Listeria in infected shrimp.
• Assessment of commercial pasteurization effectiveness on Listeria in crab meat.
• Utilized the Food and Drug Administration Listeria protocol for recovery.

Main Results:

• Listeria was detected in various seafood, including processed items.
• Listeria monocytogenes survived boiling for up to 5 minutes in shrimp.
• Commercial pasteurization effectively inactivated Listeria in crab meat.

Conclusions:

• Listeria poses a risk in seafood, with varying heat resistance.
• Commercial pasteurization is a viable method for ensuring Listeria-free crab meat.
• Standardized protocols are crucial for Listeria detection in seafood.