86 SPECIFICITY OF RICKETTSIA PROWAZEKI 



On June 22d this guinea-pig was inoculated witlri) c.c. of 

 blood from patient 799 (eighth day of typhus) and the sub- 

 sequent temperatures were as follows: 



F. F. 



June 22 No record July 7 105.4 



23 103.2 " 8 105.1 



24 No record " 9 No record 



25 102.5 10 104.6 



26 . . No record 11 . . 104.8 



27 102.6 



28 No record 



29 102.3 



30 102.1 



July 1 102.8 



2 No record 



3 105,2 



4 105.8 



5 . . 106.5 



12 105.1 



13 100.0 



14 101.2 



15 No record 



16 104.1 



17 102.6 



18 100.2 



19 103.1 



20 . . 103.6 



6 No record 



There is no record of an autopsy. 



Result: Guinea-pig 32 did not acquire typhus, during an 

 observation period of thirty-four days, as a result of the inocu- 

 lation with louse 1 of Box xxvm. It did react in a manner 

 typical of typhus, complicated by a previously existing infec- 

 tion, eleven days after the injection of typhus blood from a 

 patient. 



Conclusion: Louse 1 of Box xxvm did not contain the 

 virus of typhus. 



Record of Guinea-pig 33, inoculated with the viscera of 

 louse 2 of Box XXVIII 



The temperature of this guinea-pig rose to 104F. the 

 day following the inoculation, on May 19th, and remained 

 high (104 to 105F.) until the day preceding its death on 

 June 29th. The autopsy showed an extensive active infection 

 with pseudo-tuberculosis involving both chest and abdomen. 



Result: Valueless. 



