DETERMINATION OF PATHOGEN RESISTANCE TO STREPTOMYCIN

Abstract

This research was made in order to emphasize the actual incindence of the sensibility of various bacterial pathogens to streptomycin. The pathogens were identified as belonging to Staphylococcus, Escherichia, Citrobacter, Enterobacter, Klebsiella, Salmonella, Proteus, Pasteurella and Pseudomonas genus. Antimicrobial agar disk diffusion method was used to test the strains isolated from animals and the results were interpreted as resistant, intermediate and sensitive according to international standards. Resistance in 100% percentage was registered for staphylococci and also for the pathogens from Citrobacter, Enterobacter, Proteus, Pasteurella, Pseudomonas genus. There wasalso resistance for Escherichia coli strains - 90%, and Salmonella - 50%. Intermediary values of the antibacterial inhibition zones presented Salmonella (50%) and also Escherichia coli pathogens (10%). The only genus that was sensitive to streptomycin was Klebsiella.The frequency of resistance phenomenon to streptomycin was 87,5%, intermediary values for the inhibition zones – 8,33% and only 4,17% of the strains showed sensibility to this antibiotic.