| absence of human astrovirus rna in sewage and environmental samples. | over a period of several weeks during the summer of 1996, samples of sewage, sea water, river water, sand and silt were collected from a sewage works at weston-super-mare, england and from coastal areas nearby. a sensitive reverse-transcriptase polymerase chain reaction (rt-pcr) was used to search for human astrovirus (hastv) rna in concentrates of the samples. no evidence of astrovirus was found in any sample, which suggests that contamination with these viruses is not a problem in this area du ... | 1999 | 10212416 |