Resumo

DIAZ SOLARES, Maykelis et al. Evaluation of the antimicrobial activity of fresh extracts of Morus alba L. leaves. Pastos y Forrajes [online]. 2017, vol.40, n.1, pp. 43-48. ISSN 2078-8452.

In the plant kingdom compounds are produced with antimicrobial properties that can be used in the control of different diseases of animals as well as plants. One of the attractive species is Morusalba, which has transcendental history of use in Asian traditional medicine. For such reason, the objectives of this work were to determine qualitatively the presence of phenols and flavonoids and to evaluate the antimicrobial capacity of different fresh extracts of mulberry leaves against bacterial pathogens. For the phytochemical and antimicrobial activity essays leaves from 2 varieties (tigreada and indonesia) and 2 hybrids (IZ 15/7 and IZ 64) of M. alba were used in a completely randomized design with one positive and three negative controls (antibiotics). Fresh extracts were used for the antimicrobial activity, which was determined by the method of perforations in agar against five microorganisms that affect the animals as well as human beings: Staphylococcus aureus, Escherichia coli, Pseudomonaaeruginosa, Klebsiellapneumoniae and Streptococcus ²hemolítico. In general, the abundant presence of flavonoids and active phenols against the evaluated pathogen microorganisms without significant differences among them was observed in all the extracts. The use of M. alba is suggested as a healthy alternative to enrich the animal diet and the use of these extracts with pharmaceutical purposes is recommended to fight the diseases originated by the studied microorganisms.

Palavras-chave : plant extracts; phenol; flavonoids; pathogen organisms.

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