Diseases of Domestic Animals in Nyasaland. 



17 



in 30 to 40 days. One goat lived 209 days, and another is still alive 

 after a year and appears to have recovered. 



Monkeys. — No experiments were made on monkeys with the Mvera Cattle 

 strain. 



Dogs. — It is curious that this strain, which is harmless to guinea-pigs and 

 white rats, is the most virulent of the three to dogs, killing them, without 

 exception, in about 30 days. 



Guinea-pigs and White Bats. — The Mvera Cattle strain has no effect on 

 guinea-pigs or white rats. It is important to note how different strains of 

 T. pecorum vary in their behaviour to the smaller laboratory animals. 



II. The Wild-game Strain. 



Table XV. 





No. of 



% 



Period of 



Duration 





Date. 





Source of virus. 



incubation, 



of disease, 



Remarks. 





expt. 





in days. 



in days.* 











Goats. 







1912. 













Jan. 22... 



45 



From Eland 44 



11 



70 



Died of T. pecorum. 



Feb. 7... 



141 



From G oat 45 



8 



54 



Mar. 16... 



336 



45 



9 



4S 



?> >. 



„ 16... 



337 



» 45 



9 



20 



11 >J 



„ 16... 



338 



45 



9 



41 



V 1) 



July 20... 



899 



From Eeedbuck 912 ... 



12 





Still alive after 201 days. 



23 



898 



From Hysbh&i 955 



13 



89 



Died of T. pecorum. 



„ 30... 



978 



From Eland 1013 



13 



93 



Aug. 11... 



1037 



From Waterbuck 1061 



8 



23 



Mixed infection. 



„ 18... 



1035 



From Bushbuck 1078... 



18 





Still alive after 172 days. 



„ 18... 



1037a 



1084... 



22 



23 



Died of T. pecorum. 



„ 19... 



1106 



From Oribi 1096 



21 



74 





„ 24... 



1121 



From Eland 1202 



16 



82 



'> :i 



Sept. 4;.. 



1031 



„ 1044 



15 



43 





„ 7... 



1135 



From Bushbuck 1261 ... 



19 



85 





„ 11... 



1307 



From Buffalo 1304 



26 



35 





„ 17... 



1383 



From Koodoo 1380 



6 



68 



Still alive after 123 days. 



Oct. 6... 



1474 



From Eland 1471 



22 









Average 



15 



56 











Monkeys. 







April 9... 



403 



From Dog 355 



9 



236 



Died of T. pecorum. 



July 20... 



913 



From Eeedbuck 912 ... 







Never showed trypanosomes. 



„ 23... 



959 



From Hycena 955 







ii ii 



„ 30... 



1014 



From Eland 1013 



27 



101 



Died of T. pecorum. 



Aug. 11... 



1062 



From Waterbuck 1061 









Never showed trypanosomes. 



„ 18... 



1079 



From Bushbuck 1078... 







„ 18... 



1085 



1084... 



11 



88 



Died of T. pecorum. 



„ 19... 



1087 



From Oribi 1096 







Never showed trypanosomes. 

 >» j) 



Sept. 7... 



1262 



From Bushbuck 1261. .. 







„ U... 



1305 



From Buffalo 1304 







jj >> 



„ 17... 



1381 



From Koodoo 1380 







)> >> 



>, 25... 



1478 



From Hartebeeste 1453 







>) i> 









15 



142 





* Duration includes the days of incubation ; it dates from day of infection. 

 VOL. LXXXVII. — B. C 



