Anàlisi de poliomavirus i adenovirus humans com a indicadors de la contaminació vírica dorigen humà en aigua
ENGLISH SUMMARY: Water quality and public health is affected by the presence of pathogens present in wastewater which can be in contact with ground water used for recreational purposes or for consumption. The possible role of human polyomaviruses and adenoviruses as indicators of human viral faecal contamination has been the main objective of this thesis. The work has been divided in three thematic sections. The first section has been centred on the study of the possible role of SV40 as a human virus and as an environmental contaminant. SV40 is a simian virus discovered as a contaminant of the polio vaccine administered to millions of people between 1953 and 1963 and some studies have associated this virus with human cancer. The analysis of environmental samples in cages of a naturally infected macaque colony determined that it is excreted in variable concentrations. Waste water from northern India (where human population coexists with the natural host of the virus) was analyzed. SV40 is not excreted by the human population with the same pattern as human polyomaviruses do and it is not detected in the urban sewage analyzed. The second section is focused on developing and applying virus concentration methods from surface and drinking water. Several concentration methods were compared. The method that presented better performances was used to sample several steps of three drinking-water treatment plants for the presence of JC polyomavirus and human adenoviruses and the virus removal efficiencies of the plants. The quantification of human adenoviruses and JC Polyomavirus using quantitative PCR has showed to be a useful tool to evaluate the removal efficiency of viruses in drinking-water treatment plants. The third section is focused on the analysis of the multiplication kinetics of JC polyomavirus in different cell cultures. There is a lack of efficient in vitro multiplication systems of the virus. The possible interaction of JC and other viruses was studied. A significant BK helper function was observed when co-infecting SVG (human foetal glial cells) cells with JC that could be related to the fact that JC, being more frequently excreted, does not infect the human population until later that BK.
Advisor:Gironés Llop, Rosina
School:Universitat de Barcelona
Source Type:Master's Thesis
Date of Publication:12/12/2008