Virus-histochemistry of the oviduct. Red staining indicates the binding of the FITC-labelled virus to the tissues. Sections are counterstained with hematoxylin. A The infundibulum showed a highly specific and uniform positivity of the cilia at the level of the epithelium lining the fimbriae. B In the magnum, we observed a specific staining of the ciliated epithelium but intensity was lower compared with the infundibulum. C No attachment of the virus was observed at the level of the isthmus epithelium. D The uterus showed a scattered but specific attachment of the virus to the cytoplasm of epithelial goblet cells.