M 72
B. SEROLOGY.
(1) Kahn reaction.-Sixteen thousand five hundred and eighty-one sera were tested. The results are shown in the table.
Table XXXV.
EXAMINATION OF BLOOD Sera for SYPHILIS.
European Indian Chinese Total M. F. M. F. M. F. Strong positive.. 40 7 49 21,558 781 2,437 Positive 24 29 1 687 366 1,107 Weak positive....... 14 1 34 501 251 801 Doubtful 14 37 428 244 723 Negative 558 52 740 16 5,173 4,974 11,513 Grand total 650 60 889 19 8,347 6,616 16,581(2) Agglutination tests.-One thousand five hundred and forty-six sera were tested for agglutinins against various organisms.
Table XXXVI.
AGGLUTINATION TESTS.
Organisms European Indian Chinese Total Pos. Neg. Doubt-ful Pos. Neg. Doubt-ful Pos. Neg. Doubt-ful B. typhosus 15 80 95 95 B. para A. 88 189 19 B. para B. O 1 1 Enteric fever type undetermined 5 42 4 17 3 Weil Felix reaction. 325 1023 59 2 19 3 4 1344 Total for each race. 1 20 3 2 1346 8885 59 1539 53 2 1 265 24 1410 1546