Abstract
Background: Actinomycetes are one of the most important sources for the production of antibacterial compounds. Marine environments,
due to their unique characteristics, are considered a good option to search for bacteria with the capability of producing antimicrobial
compounds.
Objectives: The purpose of this study was to isolate the actinomycetes producing antibacterial compounds.
Materials and Methods: A total of 35 actinomycetes were isolated from Oman Sea (Lipar Area). To investigate antibacterial activity, the
isolated actinomycetes were assessed against reference and pathogenic bacteria, including Staphylococcus epidermidis, Staphylococcu
intermedius, Staphylococcu chromogenes, Staphylococcu saprophyticus, Bacillus cereus and methicillin-resistance Staphylococcu aureus,
Pseudomonas, Listeria, Klebsiella, Salmonella, Acinetobacter, and Escherichia coli O157:H7, using the cross streak method.
Results: Based on the morphological characterization, 35 isolated cases belonged to actinomycetes and %94 of them had the ability to
produce antibacterial compounds. In the cross streak method, most of the isolated bacteria have antibacterial activity against reference
S. aureus among Gram-positive bacteria and Acinetobacter among Gram-negative bacteria. Inhibition zone diameters were measured
between 2-25 and 1-20 mm for Gram-positive and -negative bacteria, receptivity.
Conclusions: Preliminary results indicate that the native Iranian Actinobacteria could be considered a suitable option for screening of
the new antibacterial compounds. Molecular research and antibacterial compound extraction against the aforementioned pathogenic
strains are also being conducted.