Differentiation of pathogenic Bartonella species by infrequent restriction site PCR

被引:19
作者
Handley, SA [1 ]
Regnery, RL [1 ]
机构
[1] Ctr Dis Control & Prevent, Natl Ctr Infect Dis, Div Viral & Rickettsial Dis, Atlanta, GA 30333 USA
关键词
D O I
10.1128/JCM.38.8.3010-3015.2000
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Infrequent restriction site PCR (IRS-PCR) is a recently described DNA fingerprinting technique based on selective amplification of restriction endonuclease-cleaved fragments. Bartonella isolates associated with human disease and related nonhuman isolates were analyzed by IRS-PCR genomic fingerprinting. Preparation of DNA templates began with double digestion using three different restriction endonuclease combinations. Combinations included the frequently cutting endonuclease HhaI in conjunction with an infrequently cutting endonuclease, EagI, SmaI, or XbaI. Digestion was followed by ligation of oligonucleotide adapters designed with ends complementary to the restriction endonuclease sites. Amplification of fragments flanked with an EagI, SmaI, or XbaI site in combination with an HhaI site produced a series of different-sized amplicons resolvable into patterns by polyacrylamide gel electrophoresis (PAGE). The pattern complexity was varied by the addition of selective nucleotides to the 3' ends of the EagI-, SmaI-, or XbaI-specific primers. Amplicons were also generated with fluorescently labeled primers and were subsequently resolved and detected by capillary electrophoresis, Analysis by traditional slab PAGE and capillary electrophoresis provided suitable resolution of patterns produced with the enzyme combinations EagI-HhaI and SmaI-HhaI. However, the combination of XbaI-HhaI produced too many fragments for sufficient resolution by traditional PAGE, thus requiring the better resolving properties of capillary electrophoresis. Due to the flexibility in modulating the pattern complexity and electrophoresis methods, these techniques allow for a high level of experimental optimization. The results provide evidence of the discriminatory power, ease of use, and flexibility of the IRS-PCR method as it applies to the identification of human-pathogenic Bartonella species.
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页码:3010 / 3015
页数:6
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