Comparative microbial evaluation of two edible seafood P. palludosa (apple snail) and E. radiata (clam) to ascertain their consumption safety

Abstract

Microbial evaluation of two edible seafood, Pomecia palludosa (apple snail) and Ergeria radiate (clam) were 
undertaking in this study to ascertain its consumption safety. These sea-food were processed as either fresh sun
dried or cooked oven-dried samples. Results revealed thatthe bacteria loadin fresh samples of E. Radiate (2.20 x 106 - 
TNT CFU/ml) was significantly (p<0.05) higher compared with P. palludosa (6.10 x 103 - 3.30 x 108 CFU/ml). The 
coliform count was also significantly (p<0.05) higher in E. Radiate (4-10 coliform/100ml) than in P. palludosa (3-6 
coliform/100ml). Cooking significantly (p<0.05) reduced the bacteria load and coliforms in both samples. In P. 
palludosa, a total of 26 bacteria were isolated: Staphylococcus aureus and Streptococcus pneumonia were most 
frequent, a total of 20 bacteria were isolated from E. radiata, Vibro spp. and E. colibeing most frequent.The three fungi 
isolates from freshE. Radiate and P. Palludosa were completely eliminated by cooking. In conclusion, fresh samples 
of clam and apple snail contain huge microbial load, hence adequate processing and proper cooking is needed 
before they are consumed.Nevertheless, the vast microbial loads in these species of sea-food could serve as a ready 
source of microbes in some processing industries.