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. 1991 Apr;57(4):1218–1222. doi: 10.1128/aem.57.4.1218-1222.1991

Development and application of new positively charged filters for recovery of bacteriophages from water.

J J Borrego 1, R Cornax 1, D R Preston 1, S R Farrah 1, B McElhaney 1, G Bitton 1
PMCID: PMC182871  PMID: 2059044

Abstract

Electronegative and electropositive filters were compared for the recovery of indigenous bacteriophages from water samples, using the VIRADEL technique. Fiber glass and diatomaceous earth filters displayed low adsorption and recovery, but an important increase of the adsorption percentage was observed when the filters were treated with cationic polymers (about 99% adsorption). A new methodology of virus elution was developed in this study, consisting of the slow passage of the eluent through the filter, thus increasing the contact time between eluent and virus adsorbed on the filters. The use of this technique allows a maximum recovery of 71.2% compared with 46.7% phage recovery obtained by the standard elution procedure. High percentages (over 83%) of phage adsorption were obtained with different filters from 1-liter aliquots of the samples, except for Virosorb 1-MDS filters (between 1.6 and 32% phage adsorption). Phage recovery by using the slow passing of the eluent depended on the filter type, with recovery ranging between 1.6% for Virosorb 1-MDS filters treated with polyethyleneimine and 103.2% for diatomaceous earth filters treated with 0.1% Nalco.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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