Avaliação Da Atividade Antibacteriana Do Pleurotus Ostreatus Isolados De Staphylococcus Aereus, Pseudomonas Aeruginosa E Escherichia Coli

Abstract

Objective: To evaluate the antimicrobial activity of the Pleurotus ostreatus mushroom. Method: Organic extracts at 100, 300 and 500 ppm concentrations were subjected to disc diffusion tests against four standard bacteria: two Gram positive (Staphylococcus aureus and Enterococcus faecalis) and two Gram negative (Escherichia coli and Pseudomonas aeruginosa). The extracts exhibiting of inhibition halo (IH) of bacterial growth equal to 8 mm were classified as active. Results: From the extracts tested, the β-glucan extract was active in both concentrations against the bacterium Pseudomonas aeruginosa and in the concentration of 500 ppm against the bacteria Staphylococcus aureus and Escherichia coli. The chitosan extract presented activity against Pseudomonas aeruginosa at the concentration of 500 ppm. The results indicated that the β-glucan extract has potential against Gram positive and Gram negative bacteria. Conclusion: The antibacterial action of this extract should be more accurate for the production and purification of this bioactive constituent of pharmacological interest.

Antimicrobial activity of the edible mushroom Pleurotus eryngii (DC.) Quél grown in liquid medium

“…This result is similar to the study of Yilmaz, Yildiz, Tabbouche, Kiliç, & Can, (2016), who tested P. ostreatus against the bacteria S. aureus ATCC 25923, E. coli ATCC 25922, P. aeruginosa ATCC 27853. Similarly, Costa, Silva, Araújo, and Carvalho (2018) did not observe the inhibition halo (IH) of organic extracts (hexane, dichloromethane, ethyl acetate and methanol) from P. ostreatus against E. coli, P. aeruginosa and S. aureus, although they did achieve IH in tests with β-glucan, isolated from this species. Key: Control (200 g L -1 of purple-skinned sweet potato ); M1, M2, M3 or M4 (200 g L -1 of purple-skinned sweet potato PSSP, 10, 20, 30 and 40 g L -1 of glucose and 2 g L -1 of YE); M5, M6, M7 and M8 (200 g L -1 of purple-skinned sweet potato , 10, 20, 30 or 40 g L -1 of glucose and 0 g L -1 of YE).…”