STAPHYLOCOCCUS

(Lat.), n. m. Sta2f(sta'f)-i2l(u6l)-o(os)- koak'ku (ku4s). From ora^vA^, a bunch of grapes, and KOKKOS, a kernel. Fr., staphylocoque. Ger., S., Traubenkokkus. A genus of Schizoniycetes (Micrococci) in which the spheres become arranged in irregular ma es compared to clusters of grapes. [B, 238, 316 (a, 35).] S. alb us liquefaciens. Of Escherich, an aerobic, liquefying micrococcus from 0'8 to 1 '2 /u in diameter, occasionally oval in form and 3 m in its long diameter, found a ociated in irregular groups; occasionally found in the alvine discharges of healthy infants, [a, 34.] S. Biskrae. Fr., microbe du bouton de Biskra. The micrococcus of Biskra button, in which disease it is found in the blood, pustules, etc. It is closely related to S. pyogenes aureus, but it liquefies gelatin much more slowly; its colonies, moreover, on agar-agar are whitish and raised, and on potatoes are of an orange-red color, [a, 35.] S. Candidas. A species found by Warring ton in milk, in which it forms so small a quantity of acid that the milk does not coagulate after boiling. The cocci are glistening white, and are a ociated in the irregular groups peculiar to the genus, [a, 35.] S. cereus (alb us). A non-pathogenic species forming cocci T16 /u. in diameter. On gelatin plates, which it does not liquefy, it produces white points that eventually attain a size of from 1 to 2 mm. In stroke cultivation it forms a white, wax-like layer with irregular, somewhat thickened borders, and on potatoes a grayish-white layer of medium thickne . The micro-organism was found by Pa et in pus, but experiments on animals show it to po e no pyogenic properties, [a, 35.] S. cereus llavus. See S. Pa etii.S. epiderm i dis alb us. Of Welch, an almost constant inhabitant of the epidermis, resembling 8. pyogenes alb us except that it has a feeble pyogenic capacity; po ibly an attenuated or modified form of that organism, [a, 34.] S. flavescens. A variety occurring in pus, differing from 8. pyogenes aureus in the pale-yellow color of its cultivations, [a, 35.] S. fulvus. A species occurring as rusty-red globules on horse dung. The cells are from 1 to 1'5 /it in diameter, usually with a viscid intercellular substance, [a, 35.] S. Leloirii. A diplococcus resembling S. Biskrce found by Leloir in cir cum follicular dermatitis. [B. 316 (a. 34).] S. Pa etii. A non-pathogenic organism occurring as diplococci about 1 11. long, found in pus. It forms on gelatin plates (without liquefying them) prominent, intensely yellow droplets, [a, 35.] S. pyogenes. A species including as varieties, according to Saccardo, S. pyogenes alb us, S. pyogenes citreus, and S. flavescens [a, 35.] See Plate iii, Fig. 10. S. pyogenes alb us. A s. found in pus, along with S. pyogenes aureus, from which it differs only in the absence of pigment, the colonies remaining white even after a long time. According to Fliigge, this variety occurs more frequently in rabbits and other animals than S. pyogenes aureus. [a, 35.] S. pyogenes aureus. Fr., slctphylocoquedore. The most common of the pyogenic microbes, being found in acute absce es, empyema, boils, acute osteomyelitis, -pyaemia, ulcerative endoA, ape; A2, at; A3, ah; A, all; Ch, chin; Cha, loch (Scottish); [s. 532]