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C5a production following incubation of formalin-treated and untreated GBS strain 37 (III-3b), 23 (III-3a), and 51 (III-2) and zymosan with serum absorbed with each of the homologous strains. The data are means ± standard deviations of triplicate determinations. There were statistically significant differences between formalin-treated cells and untreated cells for III-3a (P < 0.05) and for III-2 (P < 0.01) as calculated by the Student’s t test.
