. Surgical and gynæcological nursing. urve are knownas spirilla (Fig. 5). The rods vary considerably in length andthickness and may have rounded or blunt ends. Bacilli are eithermotile or non-motile, the former possessing whip-lash-like append-ages, attached sometimes to the ends, sometimes to all sides,which by their rapid vibration propel the organism through thesurrounding fluid (Fig. 6). The spherical forms, known as micro-cocci, differ only slightly in size, but characteristic differencesin group ;ng appear, those which are seen in pairs being knownas diplococci (Fig. 7), others which app
. Surgical and gynæcological nursing. urve are knownas spirilla (Fig. 5). The rods vary considerably in length andthickness and may have rounded or blunt ends. Bacilli are eithermotile or non-motile, the former possessing whip-lash-like append-ages, attached sometimes to the ends, sometimes to all sides,which by their rapid vibration propel the organism through thesurrounding fluid (Fig. 6). The spherical forms, known as micro-cocci, differ only slightly in size, but characteristic differencesin group ;ng appear, those which are seen in pairs being knownas diplococci (Fig. 7), others which appear in chains, like a stringof beads, are called streptococci (Fig. 8), while staphylococci CELLS OF BODY AND INVADING CELLS 19 (Fig. 9) show an arrangement in irregular bunches. Reproduc-tion takes place by simple division. A fissure appears in thecentre of the bacillus or the micrococcus, which presently sepa-rates it into two equal parts. Each half grows to a full-sizedorganism and then again divides. This process can be observed,. 2 3 4 5 6 7 8—j—i i—i Li i i i Lj i i i I » « ■ i 1 i ■ Fig. 3.—Each side of the square represents one-thousandth of an inch. The relativesize is then shown of (1) a red blood-corpusnle, (2) the anthrax bacillus, (3) the typhoidbacillus, (4) the tubercle bacillus, (5) the influenza bacillus, (6) the diphtheria bacillus,(7) the tetanus bacillus, (8) a micrococcus. and has been shown to take place under favorable conditions inabout twenty minutes. The result is a rapidity of multiplicationthat is difficult to comprehend. A simple calculation will showthat if this rate of increase continued uninterrupted for a periodof twelve hours we should then have arising from a single organisma number equal to more than ten times the entire human popula- 20 INFECTION tion of the globe. Under natural conditions, of course, manyinfluences check this process, but multiplication is neverthelessenormously rapid. Some species of bacilli produce spores,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgenitaldiseasesfemal
