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  • Title: Microbial Contamination of Herbal Preparations on the Ghanaian Market, Accra.
    Author: Darkwah S, Agbettor D, Codjoe F, Donkor ES.
    Journal: Microbiol Insights; 2022; 15():11786361221139602. PubMed ID: 36467108.
    Abstract:
    In developing countries, an estimated 80% of the population use traditional herbal medicines as part of their primary health care. As the market for herbal medicine expands in many African countries, partly due to their use in the treatment of COVID-19, there is the need to address all the associated safety issues. The aim of the study was to evaluate the microbial contamination of locally prepared, as well as imported foreign herbal products sold in Accra. Standard microbiological methods were employed in the enumeration of coliforms and the identification of pathogenic microbes in 60 herbal preparations that were sampled. A larger proportion (76.7%) of local herbal preparations was contaminated with bacteria as compared with imported ones (63.3%). Bacillus species and Pseudomonas aeruginosa were the predominant bacteria obtained from foreign and locally manufactured herbal preparations, respectively. A proportion of 36.7% (11) of the local samples were positive for coliform and the coliform counts ranged from 3.0 × 101 cfu/ml to 2.0 × 104 cfu/ml. Two foreign herbal samples (6.7%) were positive for coliforms; one had a count of 1.7 × 105 cfu/g while the other had 2 × 104 cfu/g. Herbal preparations sold in markets of Accra harbour several microbial pathogens; the risk is relatively higher for locally produced herbal preparations compared to imported herbal preparations. As a result, it is recommended that quality assurance in the production of local herbal preparations should be thoroughly monitored from the beginning of production to the final selling of the preparations. There is also the need to strengthen microbiological safety monitoring of imported herbal preparations.
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