Four commercially available fortified sera were compared to fetal bovine se
rum (FBS) with regard to their ability to maintain or increase the sensitiv
ity of the Buffalo green monkey (BGM) kidney cell line to viral infection.
Nine virus strains and five wastewater samples were used. Fortified sera we
re comparable to FBS for the enumeration of some viruses by the plaque meth
od and for the detection of virus in wastewater by the most-probable-number
assay.