[Light and electron microscopic study of the lymph node at the orifice of the eustachian tube in germ-free chicks and those contaminated with a single strain of bacteria].
D000818:Animals; D002645:Chickens; D005064:Eustachian Tube / Q000166:cytology* / Q000473:pathology; D005856:Germ-Free Life; D006801:Humans; D007239:Infections / Q000473:pathology*; D008198:Lymph Nodes / Q000166:cytology* / Q000473:pathology; D008854:Microscopy, Electron; D010950:Plasma Cells