Enteric viruses in inlet and outlet samples from sewage treatment plants
| Autor: | E. M. M. Berg, Mette Myrmel, E. Rimstad, B. Grinde |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Microbiology (medical)
Secondary treatment business.industry viruses Public Health Environmental and Occupational Health Hepatitis A Sewage Biology medicine.disease biology.organism_classification medicine.disease_cause Virus Microbiology Infectious Diseases medicine Norovirus Sewage treatment Circovirus business Waste Management and Disposal Viral load Water Science and Technology |
| Zdroj: | Journal of Water and Health. 4:197-209 |
| ISSN: | 1996-7829 1477-8920 |
| Popis: | Samples collected every two weeks from the inlet and outlet of three sewage treatment plants were screened for the presence of noro-, rota-, astro-, adeno-, hepatitis A- and circoviruses by (RT)-nested PCR, and for F-specific bacteriophages by isolation in Escherichia coli Famp. Plants A and B were secondary treatment plants and plant C used primary treatment. Noroviruses were detected in 43%, 53% and 24% of the inlet samples and 26%, 40% and 21% of the outlet samples from plants A, B and C, respectively. Astroviruses, rotaviruses and adenoviruses were more prevalent. Adenoviruses were detected in 96% of inlet and 94% of outlet samples, supporting the potential of these viruses as indicators of viral contamination from sewage. Hepatitis A virus and circoviruses were found only rarely. Reduction of infective viral particles during sewage treatment was evaluated using F-specific bacteriophages. The phages were reduced by, respectively, 99%, 87% and 0% in plants A, B and C, which corresponded to the observed differences in reduction of norovirus positive samples between the same plants. The study shows that the high viral load in sewage results in a discharge to the environment of a large amount of virus despite sewage treatment. On the other hand, the advantage of a more advanced treatment is demonstrated. |
| Databáze: | OpenAIRE |
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