Utilization of conventional methodologies and simplate system for microbiological quality evaluation of foods.
In order to evaluate correlation among SimPlate system and conventional methods for food microbiological analysis, eighteen foods (nine from vegetable origin and nine from animal origin) were analyzed for mesophilic aerobic, yeasts and molds, total coliforms and fecal coliforms. Results of the three analysis were compared and significant differences (p<0,05) occurred among the majority of foods. For mesophilic aerobic counts, between the methodologies, PCA and SimPlate, difference were not significant in two of fifteen considered foods, apple and beetroot; for yeasts and molds, using acidify PDA and SimPlate, difference were not significant in four of thirteen considered foods, mixed sausage, fish, parsley and Welsh onion and beetroot; for total coliforms, using three-tube method and SimPlate, difference were not significant in six of twelve considered foods, raw pork, chicken, mixed sausage, raw milk, pear and tomato. Regression analysis of data showed correlation coefficients like, 0,88 for three-tube method and SimPlate; 0,80 between PCA and SimPlate and 0,69, between acidify PDA and SimPlate.
Advisor:Claudio Rosa Gallo; Dejanira de Franceschi de Angelis; Claudio Rosa Gallo; Marilia Oetterer
School:Universidade de São Paulo
Source Type:Master's Thesis
Keywords:food microbiology quality microorganism
Date of Publication:07/04/2002