The review of pathogenic mechanism of Aeromonas hydrophila and action of tetracycline against it in aquatic animals

Aeromonas hydrophila is one of common bacterial disease in aquatic animals and its outbreak cause to decrease of aquatic production. Aeromonas disease is due to a protein toxin, aerolysin that exported by Aeromonas hydrophila. This protein toxin forms channels on target cells membrane, disrupting normal activities and cause to destruction and death of them. Aerolysin toxic protein is secreted by expression of the aerolysin gene. Aerolysin gene is 1482 bp and it’s an important and stable molecular marker for detecting possible of Aeromonas hydrophila infection. The PCR technique was used to study of this molecular marker. Different antibiotics used to control and treat of Aeromonas disease and tetracycline is one of the importances of them. Antibacterial mechanism of tetracycline is interference in the translation of aerolysin gene and therefore inhibition of protein synthesis in ribosome of bacteria, therefore they condemn dying. Knowledge of the antimicrobial mechanism of antibiotics can play an important role in finding suitable alternative materials for these synthetic drugs.