RESUMEN
Stool specimens from 200 cases of children with ages of less than five years with history of acute diarrhoea from Yangon Children's Hospital were proceeded for isolation of bacterial pathogens. Enterotoxigenic Escherichia coli ETEC (15.5 per cent), enteropathogenic Escherichia coli EPEC (19 per cent), Shigellae (3.5 per cent), Salmonellae (2.5 per cent), ETEC + EPEC (6.5 per cent), ETEC+Shigellae (1.0 per cent) were isolated. Antibiotic susceptibility pattern of EPEC revealed that they were resistant to ampicillin (96 per cent), tetracycline (90 per cent), streptomycin (82 per cent), chloramphenicol (80 per cent) and septrin (61 per cent); but were sensitive to nalidixic acid (100 per cent), furazolidone (92 per cent), sisomycin (90 per cent), gentamicin (88 per cent), norfloxacin (70 per cent), and cephalothin (66 per cent). For Shigellae they were resistant to ampicillin (100 per cent), cephalothin, chloramphenicol, furazolidone, streptomycin (66.7 per cent) but were 100
sensitive to sisomycin, minocycline, norfloxacin, gentamicin; tobramycin (89 per cent), neomycin (67 per cent) and septrin (56 per cent). For Salmonellae they were resistant to ampicillin (100 per cent), chloramphenicol and tetracycline (80 per cent) but were 100 per cent sensitive to cephalothin, furazolidone, gentamicin, nalidixic acid, norfloxacin, septrin and sisomycin. For ETEC they were resistant to ampicillin (100 per cent), tetracycline (79 per cent), chloramphenicol (53 per cent) and septrin (53 per cent ). They were 100 per cent sensitive to cephalothin, furazolidone, gentamicin, nalidixic acid, neomycin, norfloxacin, septrin and sisomycin.