1. Electron microscopy showing the typical IBV (Infectious Bronchitis Virus) particles found in a monolayer of chicken embryo kidney cells (CEKC) inoculated with IBV. University of Georgia. Poultry Diagnostic and Research Center. Athens, Georgia, USA

2. Electron microscopy showing the absence of IBV particles in a CEKC monolayer inoculated with 200 ppm of Citrex + IBV after incubation for 1 hour. Dark spots represent the effect caused by Citrex. University of Georgia. Poultry Diagnostic and Research Center. Athens, Georgia, USA