Detection of EPEC and STEC strains isolated from children with diarrhea in Argentina Daniel Fernández Fellenz; Julia M. Ruiz; Analía I. Etcheverría; Rocio Colello; María V. Velez; Marcelo E. Sanz; Mónica D. Sparo; Sabina Lissarrague; Josefina Pereyra; Gustavo Zanelli; Nora L. Padola;