PFGE-RFLP analysis of isolates of Bartonella. Lanes 1 and 8, DNA size standard (lambda ladder). Lanes 2 to 4 (digestion with AscI): lane 2, B. koehlerae; lane 3, B. quintana strain Toulouse; lane 4, B. henselae Houston 1-980517. Lanes 5 to 7 (digestion with NotI): lane 5, B. koehlerae; lane 6, B. quintana strain Toulouse; lane 7, B. henselae strain Houston 1-980517.