title: A cell-wall deficient form of the pneumococcus in a case of pneumonia.
mesh_terms: D001344:Autopsy; D006801:Humans; D007740:L Forms; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000209:etiology* / Q000382:microbiology / Q000473:pathology; D013296:Streptococcus pneumoniae / Q000145:classification / Q000166:cytology / Q000302:isolation & purification