in cell mediate immune
system and antibody responses were under active surveivallence for
pertusis infection was detected , the study groups were comparable
for sex distribution . the pertusis and control groups
of DT recipients were of comparable ages the DTaprecipients were
youngerthan the 2 other groups DTap recipients generally had
highest lymphoproliferative responses to the 3 soluble B . pertusis
antigens , either bypercentage of CMI responders subjects didnot
reach statistical significance . in this study , the frequency of
lymphoproliferate responses , particularly againist PT
, clearly discriminated the DTap vaccine recipients from the DT
recipients with / without history of pertusis .
overall CMI responses , rather than circulating anti - B pertusis
antibodies , appeared to be dominant feature .