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Table 2 The frequency distribution of semi quantitative slide agglutination titration test of Widal test in febrile patients suspected of typhoid fever in St. Paul’s hospital

From: A comparative study of Widal test with blood culture in the diagnosis of typhoid fever in febrile patients

Titer O antigen H antigen
Frequency % (n = 160) % from total (n = 270) Frequency % (n = 127) % from total (n = 270)
No agglutination 40 25.0 14.8 37 29.1 13.7
1:20 32 20.0 11.9 33 26.0 12.2
1:40 15 9.4 5.6 5 3.9 1.9
1:80 42 26.3 15.6 14 11.0 5.2
1:160 21 13.0 7.8 26 20.5 9.6
1:320 6 3.8 2.2 12 9.4 4.4
1:640 4 2.5 1.5 0 0 0
Total 160 100 59.3 127 100 47.0