Fig. (1) C. pneumoniae PCR of periventricular whiter matter. Lane 2 shows sample positive for C. pneumoniae at the 207 bp site (case 15), Lanes 1 and 3 are negative samples (cases 13 and 14), lane 4: negative control, lane 5: positive control (C. pneumoniae infected Hep-2 cells), lane 6: base pair ladder, lane 7 and 8: test efficiency controls