Table IV.

Cholera LPS-specific Ab in rectal secretionsa

SubjectImmunization GroupPeak Fold Increase in Specific Activity
LPS IgA1LPS IgA2LPS IgMLPS IgG
1Nb
2N
3N2.82.6
4N3.7
5N3.6
6N
17R6.537.6115.38.8
18R6.012.0165.44.6
19R3.46.568.22.5
20R4.94.826.02.8
21R4.89.24.83.4
  • a Numbers denote significant LPS-specific activity in secretions collected at monthly intervals after the second immunization.

  • b No detectable Ab or insignificant (less than 2-fold) LPS-specific activity at any time after immunization.