3.2. Microbiological quality
The microflora associated with frozen shrimp products reflects the microbial population of catching water, sediment, species difference, postharvest handling procedures, good manufacture and good hygienic practices followed during processing (Mohamed-Hatha et al., 2003). Miget (1991) stated that the initial and final microbial count of shrimp during frozen storage should be approximately the same. This means that quality changes under frozen storage were due to factors other than microbial activity such as fluctuation of storage temperature during storage, transporting and unsanitary handling. The dominant organisms associated with shrimp, prawn, and crayfish spoilage are psychotropic Pseudomonas, Moraxella and Acinetobacter spp. ( Jeyasekaran et al., 2006).