FHV-1 infection induces dose-dependent changes in resistance and capacitance (A, B). Resistance (R) and capacitance (C) measurements at 4,000 and 64,000 Hz, respectively, following infection of CRFK cells with FHV-1 at the MOIs indicated at 24 hpp. The insets show normalized resistance (R′) and capacitance (C′) values following FHV-1 infection. (C) Comparison of half-maximal R′ (R′50) and C′ (C′50) values based on data from panels A and B. Different letters indicate MOI R′50 or C′50 values that are significantly different, as determined by one-way ANOVA. No significant differences between R′50 and C′50 values were observed at any MOI, as determined by Student t test.