“…During the last 10 years the total number of cases of diarrhea in Argentina has ranged from 688,410 to 1,030,143 (mean: 838,768); therefore this pathology is currently considered a public health problem (National System of Epidemiological Surveillance (SINAVE), Ministry of Health). However, although many epidemiological studies have been carried out in order to know the incidence of viruses in ambulatory and hospitalized children with acute diarrhea [Gomez et al, 1998Bok et al, 2001;Giordano et al, 2001Giordano et al, , 2002Bereciartu et al, 2002], the presence of viral infections in gastroenteritis outbreaks and in adults has been underestimated in our country. Since the highest value of cases of diarrhea in Argentina was reported in 2004, in this paper we report the incidence of Calicivirus, Astrovirus and Rotavirus infections in eight gastroenteritis outbreaks in Argentina in 2004.…”