title: Morphologic and microbiologic features of trachea and lungs in germfree, defined-flora, conventional, and chronic respiratory disease-affected rats.
mesh_terms: D000818:Animals; D001987:Bronchiectasis / Q000662:veterinary; D001996:Bronchopneumonia / Q000662:veterinary; D013296:Streptococcus pneumoniae / Q000302:isolation & purification