Chlamydia trachomatis serovar differentiation by direct sequence analysis of the variable segment 4 region of the major outer membrane protein gene.
AUTOR(ES)
Poole, E
RESUMO
The polymerase chain reaction method was used to amplify DNA from the fourth variable segment of the gene encoding the major outer membrane protein of Chlamydia trachomatis. Direct sequencing of the amplified DNA from prototype strains confirmed previously identified nucleotide sequence differences that were specific for each serovar. This analysis revealed differences in the DNA sequences of prototype strains C/UW-1 and G/IOL-238 from those of prototype strains C/TW-3 and G/UW-57, sequenced previously. This method was also used to determine the serovar types of C. trachomatis in 125 urogenital specimens from infected patients. The most common serovars were E (38%), F (17%), and G and D (14% each). Serovar D was found significantly more often in specimens from men than in specimens from women (P = 0.004). Conversely, serovar G was found significantly more often in specimens from women than in specimens from men (P = 0.026). Only two serovar G isolates gave sequences identical to that of the prototype strain G/IOL-238, suggesting that this strain may be a serovar variant. Three isolates (D+, G-, and J') gave sequences which have not been reported previously. One isolate had the same sequence as the D- serovar variant. Sequence analysis of amplified DNA reveals subtle differences between C. trachomatis strains and provides a very sensitive method for molecular epidemiological analysis.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=257598Documentos Relacionados
- Sequence analysis of the major outer membrane protein gene from Chlamydia trachomatis serovar L2.
- The nucleotide sequence of major outer membrane protein gene of Chlamydia trachomatis serovar F.
- Nucleotide sequence of the major outer membrane protein gene from Chlamydia trachomatis serovar H.
- The major outer membrane protein nucleotide sequence of Chlamydia trachomatis, serovar E.
- Typing of Chlamydia trachomatis by restriction endonuclease analysis of the amplified major outer membrane protein gene.