104 SPECIFICITY OF RICKETTSIA PROWAZEKI 



Record of Guinea-pig 45, inoculated with rickettsia-free 

 louse 1 of Box XXXVIII 



Temperatures following the inoculation on May 24th : 



F op 



May 24 .............. 102.4 June 11 ............ 102.0 



25 .............. 102.0 12 ............ 102.4 



26 .............. 103.0 13 ............ 102.0 



27 .............. 102.5 14 ............ 102.8 



28 .............. 102.6 15 ............ 103.6 



29 .............. 102.6 16 ............ No record 



30 .............. 102.4 17 ............ No record 



31 .............. 102.0 18 ............ 102.0 



June 1 .............. 102.2 19 ............ 102.4 



2 .............. 102.4 " 20 ............ No record 



3 .............. 102.0 " 21 ............ 102.0 



4 .............. 102.6 " 22 ............ No record 



5 .............. 102.0 



6 .............. 102.0 



7 .............. 102.0 



8 .............. 101.8 



9 .............. 101.4 



10 .............. 101.4 



23 102.7 



24 No record 



25 102.4 



26 No record 



27 . . 102.8 



On June 28th this guinea-pig was inoculated intraperitone- 

 ally with 5 c.c. of blood from patient 814 (eighth day of ty- 

 phus) and the subsequent temperatures were as follows: 



F. F. 



June 28 ............ 102.5 July 8 ............ 101.8 



" 29 ............ No record " 9 ............ No record 



30 ............ 102.7 10 ............ 101.9 



July 1 .-. .......... 102.7 " 11 ............ 102.2 



2 ............ No record 12 ............ 102.4 



3 ............ 104.4 13 ............ 104.9 



4 ............ 103.4 " 14 ............ 105.3 



5 ...... . ..... 103.0 " 15 ............ No record 



6 ............ No record " 16 ............ 105.0 



7 .... ........ 102.2 " 17 ............ 104.6 



July 17th; killed. The autopsy was negative except for a 

 much enlarged spleen covered with a thin transparent fibrin- 

 like layer. The tissues were lost, and no histological data were 

 obtained. 



Result: Guinea-pig 45, inoculated with the viscera of 

 rickettsia-free louse 1 of Box xxxvm did not develop typhus 

 during an observation period of thirty-four days. After a further 

 observation period of fifteen days, following an inoculation with 



