| isolation of enterovirus and reovirus from sewage and treated effluents in selected puerto rican communities. | sewage treatment plant effluents were surveyed for viral contributions to gastroenteritis outbreaks in puerto rico. of the 15 sewage treatment plants studied, all discharged their effluents upstream from water treatment plant intakes. no base-line data on the degree of viral challenge to these sewage treatment plants or the subsequent reduction of viruses before discharge existed. enterovirus counts were generally much higher than those found in the continental united states. at four plants, vir ... | 1989 | 2541664 |