Microbiological hazard and critical control points of the school lunch production : khao kluk ka pi

Abstract

The objectives were to study microbiological hazard of Khao kluk ka pi for school food service, risk assessment and critical control points (CCP) according to HACCP principles.The production of Khao kluk ka pi had the improper hygienic practice. Thus, TPC counts were found in shallots, coriander and chilli at 1.9×106, 3.2×107 and 5.9×106 cfu/g respectively and found E. coli in chopped coriander more than 1,100 MPN/g. The TPC, S. aureus, C. perfringens, Salmonella and V. parahaemolyticus were not detected in cooked ingredients. The number of TPC in Khao kluk ka pi held at ambient temperature for 0, 2, 4 and 6 hours were founed an increase from 1.2×106 cfu/g to 7.6×106, 1.8×107 and 3.4×108 cfu/g respectively that was as a result of the uncooked ingredients and mixing process. The microbial numbers were increased when this food was held for a long time before serving. The CCP of Khao kluk ka pi production were indicated at the process of washing raw vegetables, cooking process and holding cooked food at room temperature for a long time before serving.