Abstract
Adherence of B. pertussis to NIH3T3 mouse fibroblasts was efficiently inhibited by a mouse immune serum reacting specifically with the filamentous haemagglutinin (FHA), whereas a mouse immune serum reacting specifically with the pertussis toxin (Ptx) produced partial inhibition only significant after 3 h infection. Protection against cytopathic effects on infected 3T3 cells with anti-FHA antibodies was at least as effective (83.3%± 7.5) as with anti-Ptx antibodies (75%± 4). This suggests that adherence of B. pertussis to eukaryotic receptors is a primary mechanism determining both bacterial proliferation and toxic effects in susceptible cells, and that prevention of B. pertussis attachment to cell receptors might be sufficient to protect against both infectious and toxic processes in whooping cough.
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