. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . t is distinguished from the otherspecies only by the formation of a lemon-yellow pigment. Other StaphylococcL^Other varieties have been occasionally metwith which differ in some respects from the typical varieties. Thisdifference may be in the fact that they liquefy gelatin more slowlyor not at all, or in pigment formation, or in agglutination, or in stillother respects. None of these varieties seem to be of importance. THE MICROCOCCUS TETRAGENUS. This organism was discovered by Gaffky (1881). It i
. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . t is distinguished from the otherspecies only by the formation of a lemon-yellow pigment. Other StaphylococcL^Other varieties have been occasionally metwith which differ in some respects from the typical varieties. Thisdifference may be in the fact that they liquefy gelatin more slowlyor not at all, or in pigment formation, or in agglutination, or in stillother respects. None of these varieties seem to be of importance. THE MICROCOCCUS TETRAGENUS. This organism was discovered by Gaffky (1881). It is not infrequentlypresent in the saliva of healthy individuals and in the sputum of con-sumptive patients. In sputum it is sometimes an evidence of mouthcontamination rather than lung infection. It has been observedrepeatedly in the walls of cavities in pulmonary tuberculosis associatedwith other pathogenic bacteria, which, though playing no part in theetiology of the original dis-ease, contribute, doubtless,to the progressive destruc-tion of the lung. Its pyo- /tigenie character is shown by. Fig. 100.—Micrococcus tetra-genus. Stained with methyleneblue. X 1000 diameters.
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