EFFECTS OF MYRCIA OVATA CAMBESS. ESSENTIAL OIL ON PLANKTONIC GROWTH OF GASTROINTESTINAL MICROORGANISMS AND BIOFILM FORMATION OF ENTEROCOCCUS FAECALIS

Ano: 2010 | Volume: 41 | Número: 3

Autores: Cinthya S. Cândido, Cadmo Silton A. Portella, Bruno J. Laranjeira, Sérgio S. da Silva, Angela M.C. Arriaga, Gilvandete M. P. Santiago, Geovany A. Gomes, Paulo César Almeida, Cibele B. M. Carvalho

Palavras-chave: Essential oil, Myrcia ovata Cambess., antimicrobial activity, biofilms

Resumo Inglês:

The essential oil from the leaves of Myrcia ovata Cambess., commonly used in Brazil for the treatment of
gastric illnesses, was screened for antimicrobial activity and action in the formation of microbial biofilms
by Enterococcus faecalis. The oil was obtained by hydrodistillation using a clevenger-type system. Its
chemical composition was analyzed using GC and GC-MS. Both MIC and MBC of the essential oil were
determined by broth microdilution techniques and agar dilution method. The essential oil showed
antimicrobial activity against E. faecalis, Escherichia coli, Pseudomonas aeruginosa, Salmonella
choleraesuis, Staphylococcus aureus, Streptococcus pneumoniae and Candida parapsilosis. The results
showed that the essential oil of M. ovata Cambess. was effective against the formation of biofilm by E.
faecalis when compared with the control. Four volatile compounds, representing 92.1 % of the oil, were
identified and geranial was the major component (50.4 %). At the best of our knowledge, this is the first
report of the chemical composition and antimicrobial activity of the essential oil from leaves of M. ovata.