GB FASTECOXYBLUE: Oxytetracycline belongs to the group of tetracyclines and acts bacteriostatically against many Gram-positive and Gram-negative bacteria like Bordetella, Campylobacter, Chlamydia, E. coli, Haemophilus, Mycoplasma, Pasteurella, Rickettsia, Salmonella, Staphylococcus, and Streptococcus spp. The action of oxytetracycline is based on the inhibition of bacterial protein synthesis.