Identificação e avaliação de bactérias isoladas do trato intestinal de espécies de peixe de interesse comercial no estado do Pará

Abstract

The Amazon region is composed of a large variety of fish species, and its bacterial flora is still little known. There is study interest of bacteria that refer tos for alternatives to the antibiotics used in the food industry. Therefore, this work had as objective to evaluate the microbiological of two species of Amazonian fish, to detect bacteria naturally present in the intestinal tract of fish that is in antagonistic activity in relation to pathogens and characterizers of their profile the susceptibility and resistance of bacterial species to antibiotics. A total of 39 bacteria were identified, of which 51.28% were Gram positive and 48.72% Gram negative. The microorganisms predominantly found in Gó and Pratiqueira were: Micrococus spp, Staphylococcus xylosus, Staphylococcus lentus, Serratia odorífera 1. Of the 39 bacteria that were identified, 14 presented antimicrobial activity against pathogens tested, corresponding to 35.9% of inhibitory action. Inhibition halos against the indicator microorganisms tested showed variations of 6.10 - 8.30 mm versus Salmonella Typhimurium and 6.55 - 13.7 mm for Staphylococcus aureus. Gram positive bacteria are more sensitive to pathogens and antibiotics. Bacteria have shown resistance and are sources of study to improve the efficiency of antimicrobials.