98 SPECIFICITY OF RICKETTSIA PROWAZEKI 



From these lice the following preparations were made: 



Result of Animal Inoculation 



Louse No. 



Smears 

 1 



14 

 15 

 16 

 17 



18 

 19 

 20 

 21 



Nymph 

 Excreta 



Result of Microscopical 

 Examination 



Rickettsia absent 



Rickettsia absent 



Rickettsia absent 



Rickettsia absent 



Rickettsia absent 



Wl 

 W2 



4 

 6 



Rickettsia absent 



a u 



Guinea-pig 41 ; Temp. 



Proved susceptible to blood from a 



typhus patient 



Guinea-pig 42; Temp. 



Proved susceptible to blood from a 



typhus patient 



Guinea-pig 43; Temp. 



Proved susceptible to blood from a 



typhus patient 



Guinea-pig 44; Temp. 



Proved susceptible to blood from a 



typhus patient 



Record of Guinea-pig 41, inoculated with the viscera of 

 louse 1 of Box XXXVII 



The temperatures following the inoculation on May 24th 

 were as follows: 



May 24 102.6 



25 102.0 



26 103.7 



27 No record 



28 102.8 



29 102.6 



30 102.4 



" 31 102.0 



June 1 102.3 



2 102.6 



3 . . 102.2 



