The aim of the present study was to evaluate the antibacterial activities of essential oils (EOs) obtained
from the aerial parts of Zataria multiflora Boiss against Bacillus cereus, Pseudomonas aeroginosa,
Escherichia coli and Staphylococcus aureus by in vivo and in vitro methods. Also, the effects of gamma-
irradiation (0, 10 and 25 kGy) as a new microbial decontamination on the antibacterial activities of
Z. multiflora were examined