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- Berglund, T, et al.
(författare)
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Reemergence of gonorrhea in Sweden
- 1999
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Ingår i: Sexually transmitted diseases. - : Ovid Technologies (Wolters Kluwer Health). - 0148-5717. ; 26:7, s. 390-391
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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- Chen, Shao-Chun, et al.
(författare)
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Prevalence and Molecular Epidemiological Typing of Penicillinase-Producing Neisseria gonorrhoeae and Their bla(TEM-135) Gene Variants in Nanjing, China
- 2013
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Ingår i: Sexually Transmitted Diseases. - 0148-5717 .- 1537-4521. ; 40:11, s. 872-876
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Tidskriftsartikel (refereegranskat)abstract
- Background: This study aimed to investigate the prevalence of penicillinase-producing Neisseria gonorrhoeae (PPNG) and their bla(TEM-135) gene variant in 2007 and 2012 in Nanjing, China. In addition, molecular epidemiological typing of all isolates was performed to elucidate the genetic relationships of the PPNG strains. Methods: A total of 199 and 77 N. gonorrhoeae isolates were collected at the National Center for STD Control in 2007 and 2012, respectively. Nitrocefin tests were performed to identify PPNG. Mismatch amplification mutation assay was used to identify bla(TEM-135). All isolates were genotyped using N. gonorrhoeae multiantigen sequence typing (NG-MAST), and additionally, porB-based phylogenetic analysis was performed for the PPNG isolates. Results: The total prevalence of PPNG isolates was 41% (114/276) and 58% (66/114) of these PPNG isolates possessed bla(TEM-135). In 2007, 45% (90/199) produced beta-lactamase, and of those PPNG, 58% (52/90) possessed bla(TEM-135). In 2012, 31% (24/77) were PPNG, and 58% (14/24) of those isolates contained bla(TEM-135). There were 162 NG-MAST STs among the 276 isolates, and 89 of those were novel STs. A strong association between specific NG-MAST STs and bla(TEM-135) was found, and the porB-based phylogenetic analysis showed a distant evolutionary relationship between isolates in 2007 and isolates in 2012. Conclusions: A high prevalence of PPNG and bla(TEM-135) was found in Nanjing, China. bla(TEM-135) might be a precursor in the evolution into an extended-spectrum beta-lactamase that can degrade ceftriaxone, which stresses the need to continuously monitor PPNG, bla(TEM-135), and additional evolving bla(TEM) gene variants.
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- Christerson, Linus, et al.
(författare)
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Multilocus sequence typing of urogenital Chlamydia trachomatis from patients with different degrees of clinical symptoms
- 2011
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Ingår i: Sexually Transmitted Diseases. - 0148-5717 .- 1537-4521. ; 38:6, s. 490-494
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Tidskriftsartikel (refereegranskat)abstract
- Background: In the past, contradictory results have been obtained linking Chlamydia trachomatis serovars (ompA gene) to different clinical courses of infection. Methods: A high resolution multilocus sequence typing (MLST) system was used to genotype 6 genetic regions, including ompA, in 70 Dutch urogenital C. trachomatis strains from patients with different degrees of defined clinical symptoms (asymptomatic, symptomatic, and lower abdominal pain), to determine if MLST genotypes correlated with clinical manifestations of infection. Results and conclusions: We identified 46 MLST types, with only a small overlap to Swedish MLST types. This study found no correlation between MLST profiles and symptomatology. To understand the clinical course of infection, future studies should not only consider bacterial factors but also look on the immunogenetics of the host.
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- Enbom, Malin, et al.
(författare)
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Detection of Epstein-Barr virus, but not human herpesvirus 8, DNA in cervical secretions from Swedish women by real-time polymerase chain reaction
- 2001
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Ingår i: Sexually Transmitted Diseases. - : Ovid Technologies (Wolters Kluwer Health). - 0148-5717 .- 1537-4521. ; 28:5, s. 300-306
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Epstein-Barr virus (EBV) and human herpesvirus 8 (HHV-8) are two related herpesviruses that may be sexually transmitted. GOAL: To examine the presence of HHV-8 and EBV DNA in the female genital tract. STUDY DESIGN: Real-time polymerase chain reaction systems for quantification of DNA from HHV-8, EBV, and herpes simplex virus type 2 were developed and used for examination of cervical secretions from 112 Swedish women. HHV-8, EBV, and herpes simplex virus type 2 serology was also performed on samples from all subjects. RESULTS: EBV DNA was found in 10 cervical secretion samples, sometimes in high amounts. No cervical secretion or leukocyte sample contained detectable HHV-8 DNA. Antibodies to HHV-8-latent and -lytic antigens were found in 2.7 % and 24% of serum samples, respectively. CONCLUSION: This study supports a possible sexual route of transmission for EBV but not for HHV-8. The new real-time polymerase chain reaction systems could be valuable in future studies of relations between virus load and disease
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- Falk, Lars, et al.
(författare)
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Genotyping of Chlamydia trachomatis would improve contact tracing
- 2003
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Ingår i: Sexually Transmitted Diseases. - : Ovid Technologies (Wolters Kluwer Health). - 0148-5717 .- 1537-4521. ; 30:3, s. 205-210
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Tidskriftsartikel (refereegranskat)abstract
- Background: The reported number of genital Chlamydia trachomatis infections has increased 15% annually since 1997 in Sweden. Inaccurate partner notification might be one reason.Goal: The goals were to determine if genotyping of C trachomatis would improve partner notification and to study the duration of infection.Study Design: Sexual networks were constructed. C trachomatis isolates from 231 individuals attending the Örebro STD clinic during 1 year were typed by sequencing of the omp1 gene.Results: All individuals were traced and diagnoses were established in 30 of 161 networks. More than one genotype was seen in seven networks. The mean duration of C trachomatis infection in each network was calculated to be 23 weeks.Conclusion: Genotyping could be a useful tool in partner notification when there are discrepant or uncommon genotypes. Limited clinic catchment areas create information difficulties that obstruct accurate contact tracing.
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- Filén, Finn, et al.
(författare)
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Duplex real-time polymerase chain reaction assay for detection and quantification of herpes simplex virus type 1 and herpes simplex virus type 2 in genital and cutaneous lesions
- 2004
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Ingår i: Sexually Transmitted Diseases. - 0148-5717 .- 1537-4521. ; 31:6, s. 331-6
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: A sensitive and specific method for detecting herpes simplex virus type 1 (HSV-1) and herpes simplex virus type 2 (HSV-2) is important for diagnosing genital and cutaneous infections. GOAL: The goal of this study was to compare quantitative real-time polymerase chain reaction (qPCR) with virus culture for diagnosis of genital and cutaneous HSV-1 and HSV-2. STUDY DESIGN: A duplex qPCR system for quantification of DNA from HSV-1 and HSV-2 was developed. Duplicate swabs for PCR and virus culture were collected from 89 patients attending our sexually transmitted infection and dermatology clinic. RESULTS: The duplex qPCR had a linear measure interval of 10-10 copies/mL. The detection limit was between 1 and 5 copies per reaction. qPCR detected HSV in 57 (64%) specimens and virus was isolated in 45 (50%) cases. First-episode infections showed higher viral quantities with a median value of 4.2 x 10 copies per reaction compared with recurrent infections with 1.0 x 10 (P = 0.0002). HSV-1 was more likely to be the cause of first-episode genital infections (72%), and HSV-2 of recurrent and atypical genital manifestations (73%). CONCLUSION: Real-time PCR is a sensitive method for diagnosing genital herpes, and the duplex format is convenient for typing. The method increased the detection rate by 27% compared with virus culture.
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