Abbreviations
AST: astrovirus; cDNA: complementary DNA; EV: enterovirus;
FC: faecal coliform; FE: enterococci; NCR: non code
region; ORF: open reading frame; PCR: polymerase chain
reaction; RT: reverse transcriptase; RT-PCR: reverse transcriptase-
polymerase chain reaction; RV: rotavirus; TC:
total coliform; UVB: ultraviolet B radiation.