Dj. Distefano et al., TITRATION OF HUMAN-BOVINE ROTAVIRUS REASSORTANTS USING A TETRAZOLIUM-BASED COLORIMETRIC END-POINT DILUTION ASSAY, Journal of virological methods, 55(2), 1995, pp. 199-208
Citations number
17
Categorie Soggetti
Virology,"Biochemical Research Methods","Biothechnology & Applied Migrobiology
A colorimetric end-point dilution assay was developed for the titratio
n of rotavirus-containing samples that uses commercially available tet
razolium dyes as an indicator of virus infection. This assay offers se
veral advantages over both plaque assays and traditional end-point dil
ution methods. The latter assays require manual counting of plaques or
the scoring of wells for the presence of virus based on observed cyto
pathic effects. The colorimetric end-point dilution assay enables the
scoring of wells based upon absorbance readings alone, thereby elimina
ting time-consuming and subjective manual screenings. This method also
has the potential for automating the analysis of large numbers of sam
ples. Virus titers of human-bovine rotavirus reassortants obtained usi
ng this method are comparable to those determined by plaque assay. The
scoring of wells based on absorbance readings was also found to agree
with manual scoring of cytopathic effects and with the production of
viral antigen.