[Immune effects of three different programs for revaccination among adults of non- and hypo-responders to hepatitis B vaccine]

Abstract

Objective: To investigate the immune effects of three different programs for revaccination among adults of non- and hypo-responders to recombinant Hepatitis B vaccine.

Methods: Those who were once immunized with recombinant Hepatitis B vaccine more than one standard schedule (0, 1, and 6 months) in two years and negative for Hepatitis B markers were randomly given three-different projects for revaccination. 34 adults of A group were given GM-CSF 300 microg by subcutaneous injection for the first day, then 10 microg each time by intramuscular route for routine immune method. 33 adults of B group were given Hepatitis B vaccine 20 microg each time. 33 adults of C group were given Hepatitis B vaccine 10 microg each time. The blood samples were collected before the first injection and in 1, 2 and 8 months following the first injection to test Anti-HBs.

Results: At T1, the anti-HBs positive conversion rate of group A, B and C was 26.47%, 48.48% and 18.18% respectively (chi-2 = 7.20, P = 0.027). At T8, the anti-HBs positive conversion rate of group A (64.71%) and group B (75.76%) were higher than group C (39.39%), and there was significant difference (chi-2 = 9.07, P = 0.011). At T1, the anti-HBs level of group B (417.00 +/- 69.36) was higher than that of group A (203.74 +/- 79.56). At T2, the anti-HBs level of group B (458.17 +/- 64.09) was higher than that of group C (257.86 +/- 76.60). At T8, the anti-HBs level of group A (501.48 +/- 70.00) and group B (532.73 +/- 68.82) were higher than those of group C (256.12 +/- 75.39) (t =4.27, P = 0.0173).

Conclusion: Schemes of augmentation doses of Hepatitis B vaccine and being combined with GM-CSF should be in effect for non- and hypo-responders to Hepatitis B vaccine.