MORPHOLOGIC VARIATION IN PNEUMOCOCCUS
نویسندگان
چکیده
منابع مشابه
Morphologic Variation in Pneumococcus
The problem of morphologic variation in pneumococcus has been reviewed and the desirability of studying such variation through an examination of bacterial cells rather than of bacterial colonies has been pointed out. To further this objective, a new terminology to describe the morphologic variants of pneumococcus, potentially applicable to other bacterial species, has been proposed. A hitherto ...
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Since Dawson's description of a rough variant of pneumococcus (1), little has been written concerning the bases for morphologic variation in this species. Recent studies of the effect of transformation reactions upon the morphology of pneumococcus (2-4), however, have created renewed interest in this subject and have made desirable also reconsideration of the problems of colonial variation in b...
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SUMMARY This study is designed to confirm the changes of various bones in the osteopetrotic op/op mouse. The female adult mouse were sonicated in papain solution. After the complete treatment, the bones (Skull, Mandible, Scapula, Humerus, Radius, Ulna, Hip, Femure, Tibia, Atlas, Axis and 5th Lumbar vertebra) were measured three dimensionally using of high quality scale and low power binocular ...
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A previous paper (Eaton, 1934) described variants of the pneumococcus characterized by a tendency to undergo rapid spontaneous lysis under certain cultural conditions at 370C. These variants were produced by daughter-colony dissociation of smooth pneumococcus strains on blood agar at 250C. A further investigation of this method of dissociation revealed that a second and independent type of vari...
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That bacterial derivatives possess anaphylactogenic properties was demonstrated by the pioneers in the study of anaphylaxis. But from the numerous subsequent studies in bacterial hypersensitiveness the fact has emerged that these antigens are not highly endowed with anaphylactogenic properties. Compared to such substances as egg albumin and animal serums bacterial derivatives yield positive res...
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ژورنال
عنوان ژورنال: Journal of Experimental Medicine
سال: 1953
ISSN: 1540-9538,0022-1007
DOI: 10.1084/jem.98.1.21