title: The spontaneous occurrence of wall-free organisms in the lungs of guinea pigs and their association with microvilli and cilia.
mesh_terms: D000818:Animals; D001419:Bacteria / Q000302:isolation & purification*; D001980:Bronchi / Q000382:microbiology*; D002923:Cilia; D004847:Epithelial Cells; D006168:Guinea Pigs; D007740:L Forms; D008854:Microscopy, Electron; D009174:Mycoplasma / Q000302:isolation & purification; D009585:Nitrogen Dioxide / Q000494:pharmacology; D011549:Pseudomonas / Q000302:isolation & purification; D012270:Ribosomes; D013458:Sulfur Dioxide / Q000494:pharmacology
chemical_list: D013458:Sulfur Dioxide; D009585:Nitrogen Dioxide