MICROBIOLOGICAL QUALITY OF MEDICINAL PLANTS IN DOMESTIC GARDENS

Abstract

Microbiological quality evaluation of medicinal plants is an important aspect to
provide user safety. In Brazil, the legislation mentions microbiological contamination
research. The aim of this study was to evaluate the microbial load of medicinal
plants in home gardens in one of the city districts of Ponta Grossa, Parana. The
study showed the presence of mesophilic aerobic bacteria inall samples with a load
ranging from 6.3 to 2.32 x102 x105 CFU / g. In 73% of the plants it was detected
the presence of total coliform; and in 27% of the plants the presence of coliform 45°C. Heat treatment simulating the preparation of an infusion or tea signifi cantly
reduced (p<0.0001) this contamination with counts ranging from 3.4 to 2.5 X101
x103 CFU / g. However, in 18% of the samples this reduction was not satisfactory
and the microbial load was higher than that permitted in the current legislation -
(1.0 x103) for oral use. However, these samples did not present coliform 45°C.
The data demonstrate and reinforce the need for education and guidance in the use
of medicinal plants so that microbial contamination can be reduced and not pose
a risk for health.