Abstract
Various effective methods have been developed to measure the concentration of viruses in sediment samples. However, there is need to standardize less laborious and simpler techniques. The objective of the present study was to compare two different methods to measure the concentration of viruses in soil samples. The use of polyethylene glycol (PEG) was compared with a direct extraction of viral nucleic acids from the samples diluted in modified Eagle's minimal essential medium (E-MEM). The presence of adenovirus in the samples was detected by real-time quantitative polymerase chain reaction (qPCR). Only six samples (30%) were positive for adenovirus when PEG technique was used. The direct method showed 16 (80%) samples positive for adenovirus. Therefore, direct detection (i.e. without previous concentration) demonstrated a higher rate of detection, better effectiveness, and shorter execution time. Furthermore, direct detection uses reagents that are often readily available in virology laboratories. Thus, it is an attractive alternative to other methods of detection of virus particles in sediments.
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