the self limit character of the enteric infections caused by the gramnegative bacilli anaerobes medical oxidasa positive reservation the therapy antimicrobiana for the cases of severe dysentery, similar illness to the cholera or in the lingering diarrhoeas, for the patient inmunocomprometidos with underlying illnesses and before an evidence of infection extraintestinal. in this investigation the susceptibility antimicrobiana of 89 stumps of bacilli gramnegativos isolated anaerobes medical positive oxidasa was studied of patient with illness diarrheic sharp correspondents to the national laboratory of references of illness sharp diarrheic of the institute of tropical medicine pedro isolated kouri of grounds of patient with illness sharp diarrheic, in front of 23 antimicrobianos using the method of bauer-kirby with the purpose of knowing in our country the susceptibility antimicrobiana of these microorganisms. the study of the susceptibility antimicrobiana showed high percentages of resistance of aeromonas spp. in front of the cefazolina, cafalotina and cefalexina, most of the stumps of vibrio cholerae no-01 and plesiomonas shigelloides went resistant to the trimetoprim sulfametoxazol and cefazolina, respectively. while, the resistance to the ampicilina was common for the three goods. strains of vibrio cholerae were not observed no-01 multirresistentes. the obtained results point out the importance of implementing a continuous and systematic surveillance microbiological of these agents.