African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5229

Full Length Research Paper

Antimicrobial activity of Mirabilis Jalapa and Dichrotachys cinerea against biofilm and extended spectrum of beta lactamase (ESBL) producing uropathogenic Escherichia coli

P. Poovendran1, N. Vidhya1 and S. Murugan2*
 1Department of Microbiology, Dr.N.G.P Arts and Science College, Coimbatore- 641 048, India. 2Department of Biotechnology, School of Biotechnology and Health Sciences, Karunya University, Coimbatore-641 114, India.
Email: [email protected]

  •  Accepted: 22 July 2011
  •  Published: 16 October 2011

Abstract

 

The aim of this study was to evaluate the antimicrobial efficacy of Mirabilis jalapa andDichrotachys cinerea against biofilm and Extended Spectrum of Beta Lactamase (ESBL) producing uropathogenic Escherichia coli (UPEC). M. jalapa and D. cinerea are widespread medicinal plants traditionally used to treat infectious diseases. Aqueous, acetone and ethanol extracts of leaves of M. jalapa and D. cinerea were tested for antimicrobial activity invitro by the agar well diffusion method. Ethanol extract of M. jalapaleaves exhibited antimicrobial activity against all tested biofilm producing UPEC strains, whereas it inhibited only the ESBL producing UPEC strains 42 and 96. Similarly, the acetone extract of M. jalapa leaves inhibited the growth of biofilm producing UPEC strains 1, 17 and 82, whereas it inhibited only the ESBL producing UPEC strains 42 and 96. Ethanol extract of D. cinerea leaves exhibited inhibitory activity against all tested biofilm producing UPEC strains, whereas it inhibited only the ESBL producing UPEC strain 87. Similarly, the acetone extract inhibited only the growth of biofilm producing UPEC strain 82, whereas it inhibited the growth of ESBL producing UPEC strains 87 and 96. The aqueous extracts of M. jalapa and D. cinerea leaves failed to show any inhibitory effect against both biofilm and ESBL producing UPEC strains. These antimicrobial properties seem to be related to the presence of alkaloids, tri-terpenoids and tannin contents in M. jalapa and D. cinerea.  The present study shows that crude extracts of M. jalapa and D. cinerea especially the acetone and ethanol extracts exhibited significant activity against biofilm and ESBL producing Uropathogenic E. coli strains.

 

Key words: Biofilm, ESBL, Escherichia coliM. Jalapa, D. cinerea, antimicrobial activity.

Abbreviation

Abbreviations: UTI’s, Urinary tract infections; UPEC, uropathogenic Escherichia coli.