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.

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.