24 Col. Sir D. Bruce and others. Trypanosome [July 22, 
From a comparison of these tables and the figures on Plate 3, there can 
be little doubt that the trypanosome found in the blood of cattle in Uganda 
in 1909 is identical with that seen in 1903, and also with that discovered by 
Ziemann in Togoland, and named by him Trypanosoma vivax. 
As Dr. Laveran kindly examined the Uganda specimens and pronounced 
them to be 7rypanosoma cazalbouwr, it is probable that Trypanosoma vivax and 
Trypanosoma cazalbowi are the same species. 
ANIMALS SUSCEPTIBLE TO TRYPANOSOMA VIVAX. 
| No. Souee Uae Period of | Duration | 
Date. of : incubation, | of disease, Remarks. | 
expt. hae es in days. | in days. 
Cattle. 
1909. | | | 
July 12 | 431 | Nat. infec. | P — Alive after 38 days. 
Jan. 14, 450 - | ? 48 Died of 7. viva: | 
Feb. 2| 493 : P 2°8 Also infected by 7. pecorum. 
Mar. 6; 583 s ? 237 7‘ i | 
» 14| 597 _ ? 49 Died of 7. vivax. 
» 14; 598 i 2 79 . a 
May 16; 779 i ? 6 bs . i 
July 12 | 1309 ? 40 :, i | 
aya = Tse) io | ? = Alive after 30 days. | 
Sept. 29 | 290 Ox 1465 30 32 Died of 7. vivax. | 
Mar. 3 467 Ox450 | —- — Experiment stopped after 77 days. | 
May 19 9869 | Oxen 493, mers — | i, a Ol. by 
583, & 598 | 
sy) 870 i — — Pp Bs Olea | 
July 27; 737 Goat 864 | 15 60 Died of 7’. vivax. 
June 21, 1030 - | 10 83 | ss . 
July 6; 1267 < 22 55 | 
eG Ete 15 114 | Killed. | 
| = fe se a | ee | 
| Average ...| 18 89 
| 
Goat. | 
Mar. 31 | 623 Ox 598 — — Experiment stopped after 48 days. | 
Apr. 2 636 Ox 494 — — 5 Pe 46 ,, 
eS GSO Ox 583 2 ae a - eee 
May 19 864 Ox 779 15 148 Died of T. vivar. 
|; Aug. 4] 1419 Ox 1309 22 -— Still alive after 30 days. | 
Sept. 10 | 1652 Ox 1318 21 31 Died of 7. vivax. 
| June 22| 1086 Goat 864 27 29 Ky ‘5 
— 1037 — -- Never showed trypanosomes ; under 
observation 66 days. 
June 25| 1079 - 21 —~ Experiment stopped after 21 days. 
July 19| 1344 ie 36 — * 35 36 oy | 
” 26 1383 ? 24, anes ”? ” 24 ” i 
| Aug. 6] 1433 a 12 17 Died of 7. vivax. | 
| | Average a 22 56 
