<prompt> Travellers diarrhoea is caused byShigellaEscherichia coliEntamoeba histolyticaGiardiasis  <response>: Enterotoxigenic E.coli ETEC: Diarrhea caused by ETEC is of two epidemiological types Endemic in developing countries causing watery diarrhea to fatal disease. Travellers diarrhea seen in persons from non-endemic areas visiting endemic areas. Ref: Textbook of microbiology; Ananthanarayan and panikers; 10th Edition; Pg:285 