Initial sites of localization and multiplication of Pasteurellamultocida were examined in chickens intravenously inoculated with varying doses of bacteria. Sections of lung, liver, kidney, bone marrow and spleen were prepared for light microscopic examination.Tissue sections were stained with the hematoxylin and eosin stain,Gram's stain or the avidin-biotin-peroxidase complex immunoenzymatictechnique. Of...