72 samples of medicinal plants produced at seven different regions of Paraná State, Brazil, were analysed according to the World Health Organization methodology. The results of the microbiological analysis (total viable aerobic count, yeasts and moulds count, detection of Enterobacteriaceae and other Gram-negative bacteria: Escherichia coli, Salmonella sp., Pseudomonas aeruginosa and Staphylococcus aureus indicated that the majority of the samples (79%) is not in accord to World Health Organization parameters for medicinal plants to be used for herbal tea or topic and internal uses. The main reason of this poor microbiological quality was due to aerobic microrganisms and yeasts and moulds counting. It is an evidence that producers must be orientated by capable professionals in every stage of production in order to provide the necessary quality of the raw material to further medicinal usage.
microbiological quality; medicinal plants