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  • Title: Antimicrobial activity of Asteraceae species against bacterial pathogens isolated from postmenopausal women.
    Author: Chiavari-Frederico MO, Barbosa LN, Carvalho Dos Santos I, Ratti da Silva G, Fernandes de Castro A, de Campos Bortolucci W, Barboza LN, Campos CFAA, Gonçalves JE, Menetrier JV, Jacomassi E, Gazim ZC, Wietzikoski S, Dos Reis Lívero FA, Wietzikoski Lovato EC.
    Journal: PLoS One; 2020; 15(1):e0227023. PubMed ID: 31905207.
    Abstract:
    PURPOSE: Investigation of the antibacterial action of aqueous extracts of Bidens sulphurea, Bidens pilosa, and Tanacetum vulgare, species of Asteraceae family that are popularly used for the treatment of genito-urinary infection. METHODS: The minimum inhibitory concentration (MIC) and minimal bacterial concentration (MBC) of the extracts against standard strains of Staphylococcus aureus (ATCC25923), Enterococcus faecalis (ATCC29212), Escherichia coli (ATCC25922), and Pseudomonas aeruginosa (ATCC27853) and against bacteria that were isolated from cultures of vaginal secretions and urine from menopausal women with a diagnosis of recurrent urinary tract infections (rUTI) were determined by broth microdilution. RESULTS: The MIC values of the three extracts against Gram-positive and Gram-negative standard bacterial strains ranged from 7.81 to 125.00 mg ml-1, and the MBC values ranged from 7.81 to 500.00 mg ml-1. However, B. sulphurea was more efficient. In the urine samples, the three extracts inhibited the growth of coagulase-negative Staphylococcus spp., and the B. pilosa was the most active extract against E. coli compared with the other ones. For the vaginal secretion samples, no significant differences in the inhibition of coagulase-positive Staphylococcus spp. and P. mirabilis were found among the extracts. T. vulgare and B. sulphurea were more effective in inhibiting coagulase-negative Staphylococcus spp. compared with B. pilosa. E. coli was more susceptible to the B. sulphurea extract compared with the B. pilosa and T. vulgare extracts. CONCLUSION: The present results suggested the potential medicinal use of Asteraceae species, especially B. sulphurea, as therapeutic agents against rUTI-related bacteria.
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