In:
Facta universitatis - series: Physics, Chemistry and Technology, National Library of Serbia, Vol. 11, No. 1 ( 2013), p. 45-53
Abstract:
Antimicrobial activity of methanol extracts of four Parmeliaceae lichens
(Hypogymnia physodes (L.) Nyl., Evernia prunastri (L.) Ach., Flavoparmelia
caperata (L.) Hale and Parmelia sulcata Taylor) against a panel of microbial
strains (11 Gram-positive (Enterococus sp., Bacillus subtilllis, Sarcina
lutea, Micrococus luteus, Staphylococcus aureus, Clostridium sporogenes) and
Gram-negative bacteria (Escherichia coli, Proteus vulgaris, Salmonela
enteritidis, Pseudomonas aeruginosa, Klebsiella pneumoniae), the filamentous
fungus A. niger and the yeast C. albicans) was assayed using a disk diffusion
method (1 mg of the extract per disc; extracts were dissolved in methanol, 25
mg/mL). All tested extracts showed moderate antimicrobial activity.
Multivariate statistical treatment (agglomerative hierarchical clustering
analysis, AHC) of the obtained results allowed grouping of the samples
according to their antimicrobial potential against different strains:
antimicrobial profile of H. physodes and E. prunastri extracts were
comparable; the similar is true for F. caperata and P. sulcata samples. In
addition, based on the similarities/ dissimilarities in their susceptibility
toward the tested extracts, two groups of microorganisms could be
distinguished: Group I - P. vulgaris, K. pneumoniae (Gram-negative bacteria),
A. niger and C. albicans; Group II - E. coli, S. enteritidis, P. aeruginosa
(Gram-negative bacteria) and all of the assayed Gram-positive strains.
Type of Medium:
Online Resource
ISSN:
0354-4656
,
2406-0879
DOI:
10.2298/FUPCT1301045S
Language:
English
Publisher:
National Library of Serbia
Publication Date:
2013
detail.hit.zdb_id:
2380853-6
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