. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . deep), while in Trepon-ema dentium the average relationship is 1 to , the spirals being moreshallow. The angle of the spiral turn is very sharp in both forms (morethan 90°). Flagella-like anterior and posterior prolongations are often seen inthe pallidum. The double flagella occurring rarely at one end areinterpreted by Sehaudinn as beginning longitudinal division. Sehau-dinn states that the division occurs very quickly (hence the reasonwhy so few dividing forms are seen in stained preparations)
. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . deep), while in Trepon-ema dentium the average relationship is 1 to , the spirals being moreshallow. The angle of the spiral turn is very sharp in both forms (morethan 90°). Flagella-like anterior and posterior prolongations are often seen inthe pallidum. The double flagella occurring rarely at one end areinterpreted by Sehaudinn as beginning longitudinal division. Sehau-dinn states that the division occurs very quickly (hence the reasonwhy so few dividing forms are seen in stained preparations) and thatit may be followed only by the most experienced observers during life. 508 SPIROCHETA AND ALLIES In the living condition the organism is not very refractive,: so it is seenat first with difficulty. Its characteristic movements are rotation on itslong axis, quivering movements up and down the spiral which is com-paratively rigid, slight forward and backward motion and bending ofthe entire body. By the use of the ultramicroscope the motility of theorganism is clearly seen (Fig. 173)..
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