EXAMINATION OF BLOOD SERA FOR SYPHILIS.
EUROPEAN INDIAN CHINESE Total M. F. M. F. M. F. Strong positive 20 1 75 2,164 662 2,922 Positive 11 2 56 494 207 770 Weak positive 5 2 50 488 165 710 Doubtful 12 2 91 510 148 763 Negative 177 47 372 5 2,686 1,571 4,858 Grand Total 225 54 644 5 6,342 2,753 10,023(2) Agglutination tests. Eight hundred and fifty-five sera were tested for agglutination as follows:
AGGLUTINATION TESTS EUROPEAN INDIAN CHINESE Total ORGANISMS Pos. Neg. Pos. Neg. Pos. Neg. B. Typhosus 31 125 1 158 6 28 B. Para. A 180 476 B. Para. B 33 4 652 849 B. Para. C 159 34 B. Melitensis 1 1 B. Abortus 655 ... 3 ... 3 Weil Felix reaction 1 2 2 Grand Total 35 448 7 95 185 1,783 855