Avtor/Urednik | Šimenc, Janez; Ružić-Sabljić, Eva; Strle, Franc | |
Naslov | Comparison of pulsed-field gel electrophoresis (PFGE) and two different polymerase chain reaction (PCRs) for species identification of Borrelia burgdorferi sensu lato strains | |
Tip | članek | |
Vir | Wien Klin Wochenschr | |
Vol. in št. | Letnik 114, št. 13-14 | |
Leto izdaje | 2002 | |
Obseg | str. 551-6 | |
Jezik | eng | |
Abstrakt | The purpose of the present study was to compare the findings of three different molecular-biological methods for Borrelia burgdorteri sensu lato species identification: (i) large DNA fragments pattern obtained with Mlul restriction endonuclease and separated with pulsed-field gel electrophoresis (PFGE); (ii) polymerase chain reaction (PCR), the region inside the 16S rRNA gene multiplied with species-specific primers; and (iii) PCR, the interspace region between the 5S and 23S rRNA genes amplified, the PCR product restricted with Msel restriction endonuclease and fragments separated in polyacrylamide gel. Forty-eight Borrelia strains isolated from diverse clinical material and two tick strains were analyzed. Each of the 50 isolates analyzed by PFGE was found to be a single species: 30 B, afzelii, 14 B. garinii, and 6 B. burgdorferi sensu stricto. PCR amplification of 16S rRNA with species-specific primers revealed a single species in 41/50 samples and in nine samples two species were detected. PCR of the 5S-23S interspace region restricted with Msel restriction endonuclease detected a single species in 48/50 samples and a mixture of two species was found in 2/50 samples. In all cases where a single species was identified using PCR the species was in accordance with the PFGE result, and in all cases where a mixture of two species was identified by PCR one of the species was the same as that detected by PFGE. Using a criterion of complete concordance of the results a significant difference in species identification was found when PFGE and the 16S rRNA PCR were compared (p=0.0026), but not between 5S-23S interspace PCR and PFGE (p=0.4949) or between 16S rRNA and 5S-23S interspace PCRs (p=0.0552). PCR assays were faster and easier to perform than PFGE for Borrelia species identification, however PFGE remains a standard procedure for analyzing isolates and demonstrating heterogeneity within species. | |
Deskriptorji | BORRELIA BURGDORFERI ELECTROPHORESIS, GEL, PULSED-FIELD POLYMERASE CHAIN REACTION |