Determinação da qualidade microbiológica e físico-química de chás de Cymbopogon citratus (D.C) Stapf (capim-limão)

Abstract

Considering the great volume of lemongrass production and commercialization, it is estimated that a potential microbiological contamination of this product could represent an important hazard to public health. This study was performed to evaluate different brands of lemongrass tea, regarding their microbiological and physical-chemical quality, based on the legislation of the Brazilian Health Ministry. No traces of Salmonella sp. were found, but in 50% of samples, the presence of coliforms was detected at 35°C. Three samples presented coliforms at 45°C, with Escherichia coli found in one of them. 81.25% of samples presented molds and yeasts. Among the fungi present, Aspergillus niger was identified, but aflatoxins were absent. None of the infusions analyzed presented the contamination evidenced in the dry product. The results obtained may be indicative of failure in procedures of postharvest and commercialization. The implementation of a hazard analysis and critical control point system (HACCP) could reduce this contamination substantially.