Serum opsonic capacity against B. pertussis was studied by using quantitative
chemiluminescence (CL), a method known to have several advantages over
conventional methods in evaluating opsonization and phagocytosis. Sera from
unvaccinated infants was shown not to contain opsonins against B. pertussis and
in unvaccinated infants suffering from whooping cough, no opsonins were
detected. In ad...
