Adherence of S. schleiferi to purified human fibronectin in vitro. By using a microtiter plate assay, absorbance was compared among S. aureus 8325-4, S. epidermidis NCTC 11047, S. schleiferi NCTC 12218, and 25 clinical isolates of S. schleiferi cultured from the following sources: blood cultures (bars 1 to 11); pacemaker leads, boxes, or wounds (bars 12 to 19); an intravenous cannula (bar 20); a brain abscess (bar 21); cerebrospinal fluid (bar 22); and wound infections (bars 23 to 25). Each isolate was tested in quadruplicate in an individual assay, and each experiment was performed in triplicate. Values are means ± SEM.