PCR-based identification of Bartonella species. An ethidium bromide-stained agarose gel (3%) demonstrating amplified products from template DNAs derived from Bartonella species is shown. B. bacilliformis, B. clarridgeiae, B. elizabethae, B. henselae, B. quintana, and B. vinsonii subsp. berkhoffii yielded expected products of 211, 154, 241, 172, 157, and 260 bp, respectively. The first and last lanes each contain a 20-bp ladder.