“…Among the different infectious agents involved in the pathogenesis of disease, rotavirus plays a major role accounting for more than 50 % of hospitalized cases in peak months (Kapikian et al 1976;Konno et al 1978). In addition to rotaviruses, several other candidate aetiological viral agents are known, including enteric adenoviruses (Albert, 1986), astroviruses (Madeley & Cosgrove, 1975), calicivirus (Madeley & Cosgrove, 1976), coronavirus (Caul, Paver & Clarke, 1975), the Norwalk group of viruses (Kapikian et al 1982) and other 20-30 nm diameter small round viruses (Flewett, Bryden & Davies, 1974; Middleton, Szymanski & Petric, 1977).…”