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Efficiency of antibiotics and gamma irradiation in eliminating Streptomyces strains isolated from paintings of ancient Egyptian tombs
Faculty
Science
Year:
2013
Type of Publication:
Article
Pages:
45-50
Authors:
Abdel-Haliem, Mahmoud E. F, Ali, Mona F, Ghaly, Mohamed F, Sakr, Akmal A
DOI:
10.1016/j.culher.2012.03.009
Journal:
JOURNAL OF CULTURAL HERITAGE ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Volume:
14
Research Area:
Archaeology; Art; Chemistry; Geology; Materials Science; Spectroscopy
ISSN
ISI:000313741400007
Keywords :
Azurite, Gamma irradiation, Hematite, Lamp black, Limonite, Malachite, Oserkon II, Streptomyces, 16S rRNA gene, Tanis, Tell Basta
Abstract:
Forty-six Streptomyces strains were isolated from paintings and stone surfaces from Tell Basta and Tanis tombs (80 km south-east Cairo, Egypt). Eight of these strains were selected to determine their sensitivity against 13 antibiotics. In general, high levels of resistance could be observed. Gentamycin, spiramycin and doxycycline were the most effective antibiotics against the majority of strains under study. Due to the observed antibiotic resistances, gamma irradiation was studied as a possible alternative to inhibit microbial growth. Isolated bacteria were exposed to different doses of gamma irradiation (5, 10, 15, 20 and 25 kGy). The growth of all Streptomyces isolates except S. canarius was completely inhibited at 25 kGy. The applied doses of gamma irradiation did not cause any observable alterations or colour changes to pigments and binding media (arabic gum, animal glue and egg-yolk) used in the paintings. (C) 2012 Elsevier Masson SAS. All rights reserved.
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