Figure 3
Relative plasma IgG levels in immunized birds. IgG 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 Groups inoculated via the oral route. Immunized birds showed significant differences in their IgG levels as compared to the control group. This significant difference was observed at the 2nd week post-immunization. B Groups inoculated via the intramuscular route. Birds in Group C showed prominent increase in the IgG levels that declined gradually. As compared to the non-immunized group, the immunized groups showed significant differences at all sampling time points, except during the first week. *Significant difference compared to the control group (P ≤ 0.05), **Significant difference between immunized groups (P ≤ 0.05).