Transmission Electronic Microscopy of BHK-21 cells.

Note: cells incubated with (A) DMEM-HAM 2.5% FBS–negative control (1 μm), (B1 and 2) WRV–positive control (1 μm and 200 nm), (C) IVS–(1 μm) and (D1 and 2) IVS+ (1 μm and 200 nm) at 37°C for 72 h. Arrowheads in (B) indicate rabies virus particle, arrowheads in (D) indicate unconfirmed virus particles.