sentence: Appropriate product release and characterization testing ( i.e ., in GMP settings ) of hFPT MCB and WCB lots may comprise recovery assays , isoenzyme and sterility testing , specific testing for endotoxins , mycoplasma , viral contaminants ( e.g ., adenovirus , B19 parvovirus , BPyV , EBV , HPV , HBoV , HAV , HBV , HCV , hCMV , HIV , HTLV , HHV , KIPyV , orthomyxovirus , paramyxovirus , picornavirus , reovirus , West Nile virus , WUPyV , SV40 ) , reverse transcriptase activity testing , or quantitative transmission electron microscopy ( TEM ) of cell sections for the detection of pathogenic contaminants ( e.g ., viruses , virus-like particles , mycoplasma , yeasts , fungi , bacteria ) [ 61 ] .