Figure 4

Relative intestinal SIgA levels in immunized birds. SIgA antibodies produced against the SE outer membrane protein antigens were measured using indirect ELISA. Bird groups were inoculated with: A, PBS control; B, JOL1087 and C, JOL1641. A Bird groups immunized via oral route. At the second week post-immunization, Group C birds showed significant rises in SIgA levels as compared to the other groups. B Bird groups immunized via the intramuscular route. At the first week post-immunization, Group C birds showed significant increases in SIgA. Birds in Group C showed consistent increases in SIgA levels 2, 3 and 4 weeks post-immunization. *Significant difference compared to the other groups (P ≤ 0.05).