2. Materials and methods
2.1. Materials
The following samples of frozen shrimp products were directly obtained from one of the Egyptian imported food companies through years 2014–2015: 10 of block frozen broken peeled shrimp (pieces), 14 samples of block whole raw frozen shrimp, 8 of block headless whole frozen shrimp, 14 samples of IQF peeled headless frozen shrimp, 35 of block peeled headless frozen shrimp, 16 of IQF peeled deveined frozen shrimp, and 12 of block peeled deveined frozen shrimp. The samples were transported to the laboratory in ice boxes under aseptic condition and stored immediately at −20 °C in deep freezers until microbiological analysis.