Antibacterial effects of Istanbul thyme (Origanum vulgare L. subsp. hirtum (Link) Ietsw.) and Karabas¸ thyme (Thymbra spicata L. var. spicata) extracts
Antibakterielle Wirkung der Extrakte aus Istanbul-Thymian (Origanum vulgare L. subsp. hirtum (Link) Ietsw.) und Karabas¸ -Thymian (Thymbra spicata L. var. spicata)
Dr. Mehmet Musa Özcan
Department of Food Engineering
Faculty of Agriculture
University of Selcuk
42079 Konya
Turkey
mozcan@selcuk.edu.tr
The most sensitive bacteria against extract concentrations were Bacillus subtilis, Bacillus cereus and Mycobacterium smegmatis. In addition, E. coli 0157: H7 shown resistance against effect of Istanbul thyme extract. While the most sensitive microorganism against Karabas¸ thyme extract had Mycobacterium smegmatis, Yersiniae enterocolitica shown strong resistance. The inhibitory effect of extracts changed depending on concentrations. Most sensitive bacteria against extract concentration had Gram (+) bacteria that Mycobacterium smegmatis, Bacillus subtilis and Bacillus cereus. The most resistant bacteria is Gram (–) bacteria, E. coli O157: H7, Klebsiella pneumoniae, Staphylococcus aureus and Yersiniae enterocolitica were found. Generally, antibacterial effects of I˙stanbul extracts obtained by different application and extraction systems were found partly high compared with effects of Karabas¸ thyme extracts.
Die empfindlichsten Bakterien gegenüber den Extrakt-Konzentrationen waren Bacillus subtilis, Bacillus cereus und Mycobacterium smegmatis. E. coli 0157: H7 zeigte Resistenzen gegenüber Istanbul-Thymian Extrakte. Während Mycobacterium smegmatis der empfindlichste Mikroorganismus gegenüber Extrakte von Karabas¸-Thymian war, zeigte Yersiniae enterocolitica Resistenzen. Die hemmende Wirkung der Extrakte verändert sich je nach Konzentration. Die empfindlichsten Bakterien gegenüber der Extrakt-Konzentration waren grampositiv: Mycobacterium smegmatis, Bacillus subtilis and Bacillus cereus. Die resistentesten Bakterien waren gramnegativ: E. coli O157: H7, Klebsiella pneumoniae, Staphylococcus aureus und Yersiniae enterocolitica. Grundsätzlich war die antibakterielle Wirkung, der aus unterschiedlichen Extraktionssystemen gewonnenen I˙stanbul-Thymian Extrakte höher, als die der Karabas¸ -Thymian-Extrakte.