Abstract
Adherence to host cells by pathogenic bacteria is achieved through both specific and non-specific mechanisms. The former involve bacterial adhesin and corresponding cell receptors (Gibbons and Van Houte, 1980), while the second include electric charges and hydrophobicity of bacterial cell walls. In a previous study (Beck et al., 1988), we showed that these two cell surface characteristics vary during growth of Staphylococcus aureus in a manner which should promote adherence to host cells. The aims of the current study were to assess: (1) whether the same growth-related variations in surface properties were present in another bacterial species, Streptococcus pneumoniae; (2) whether the adherence of the two types of bacteria to epithelial cells was in fact different at different growth times; and (3) whether such differences were consistent with the observed surface properties.
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