40 THE WEILr-FELIX REACTION 



SUMMARY OF THE TABLE OF AGGLUTINATION TESTS 

 ON TYPHUS PATIENTS 



Of the eighty-three sera from typhus patients tested, only 

 3 or 3.6 per cent failed to agglutinate one of the B. proteus cul- 

 tures at a dilution of 1-100. Fifty-six or 67 per cent were posi- 

 tive in a dilution of 1-800 or over, 26 or 31 per cent were still 

 positive at 1-1600. The highest dilution at which agglutina- 

 tion was obtained was 1-3200. 



The highest dilution at which agglutination was obtained 

 with any of the eight non-typhus sera was 1-50. 



Our results are in accord with those of many other workers 

 who have tested the value of the Weil-Felix reaction. The test 

 is valuable as a supplement to clinical observation in the di- 

 agnosis of typhus. It should be employed as part of the routine 

 work of the laboratory of every hospital receiving typhus 

 cases. 



