title: A cytotoxicity and comparative antibacterial study on the effect of Zataria multiflora Boiss, Trachyspermum copticum essential oils, and Enrofloxacin on Aeromonas hydrophila.
abstract: OBJECTIVE
  this study designed to test the antibacterial potency of enrofloxacin (ENR) and essential oils from Zataria multiflora Boiss (ZEO) and Trachyspermum copticum (TEO) on Aeromonas hydrophila.
  
  
  METHODS
  The antibacterial potency of test compounds was determined by several methods including the inhibition zone diameter determination, microbroth dilution method and colorimetric method of MTT. The cytotoxicity of test substances was assessed on Chinook salmon (Oncorhynchus tshawytscha) embryo (CHSE-214) cells.
  
  
  RESULTS
  RESULTS showed that ENR and tested essential oils exert antibacterial effect against A. hydrophila. Moreover, ENR exerted the most potent antibacterial effect with MIC values of 62.5 ng/ml. The natural compounds of ZEO and TEO also showed antibacterial effects with rather high MIC values of 0.315 mg/ml, and 1.25 mg/ml, respectively. None of the tested substances showed toxicity on CHSE-24 cells.
  
  
  CONCLUSIONS
  It is concluded that ZEO and TEO could be applied to prevent from A. hydrophila infection. Moreover, data also suggest that MTT method could be both cost- and time-effective and accurate method of MIC determination.
authors: Department of Pharmacology & Toxicology, Faculty of Veterinary Medicine, Urmia University, Urmia, I. R. Iran.
authors: Hassan
authors: H
authors: Malekinejad
authors: Department of Pharmacology & Toxicology, Faculty of Veterinary Medicine, Urmia University, Urmia, I. R. Iran.
authors: Behnaz
authors: B
authors: Bazargani-Gilani
authors: Department of Pathobiology & Quality Control, Artemia & Aquatic Animal Research Institute, Urmia University, Urmia, I. R. Iran.
authors: Amir
authors: A
authors: Tukmechi
authors: Department of Pharmacology & Toxicology, Faculty of Veterinary Medicine, Urmia University, Urmia, I. R. Iran.
authors: Hadi
authors: H
authors: Ebrahimi
keywords: Cytotoxicity; MTT Technique; Microbroth dilution Method; Natural Antibacterial Substances