TABLE 2.

Development of antibodies against diphtheria toxin in diphtheria patients as measured by NT (on admission) and EIA

Diphtheria patient no.Antibody titer (IU/ml) on admission determined by:Antibody titer (IU/ml) determined by EIA
NTEIADays 5-10Days 11-20Days 21-30After 30 days
11.2800.6090.3983.9802.458
20.1600.0220.0720.3160.496
30.6400.1760.0764.0110.6720.029
40.1600.0440.2015.2405.240
582a5.2405.2402.5660.628
682a0.6905.2405.240
70.001250.0051.1000.500
80.001250.1165.2405.240
9Not takenNot taken0.6612.6421.047
10Late admissionLate admission0.7890.5290.8330.886
110.0100.0775.2401.2790.5160.219
12321a0.0100.242
130.0100.0053.6751.758
140.3200.2185.2405.2405.2405.240
150.0100.0430.1690.7890.581
    Median0.0850.0770.530b3.6700.886
  • a A serum sample was taken after EHAS was injected.

  • b The increase in antibody levels since admission was statistically significant.