scholarly journals Non-detection of Chlamydia trachomatis infection by polymerase chain reaction in pregnant Iranian women

2012 ◽  
Vol 3 (1) ◽  
pp. 8 ◽  
Author(s):  
Parvin Hassanzadeh ◽  
Hosein Sharifi ◽  
Abdollah Bazargani ◽  
Reza Khashei ◽  
Amir Emami ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Chlamydia Trachomatis ◽  
Pregnant Women ◽  
Sensitivity And Specificity ◽  
Urine Samples ◽  
World Health ◽  
Chain Reaction ◽  
Transmitted Infection ◽  
Polymerase Chain ◽  
Pcr Test

<em>Chlamydia trachomatis</em> is the most common cause of sexually transmitted infection. In 75% of women and 50% of men infection is asymptomatic. According to World Health Organization reports, the number of new genital infections with <em>Chlamydia trachomatis</em> reaches 100 million annually. The sensitivity and specificity of nacid amplification tests are 95% and 99%, respectively. Urine samples can provide a non-invasive method of testing for the detection of <em>Chlamydia trachomatis</em> by polymerase chain reaction (PCR). The aim of this study was to evaluate the prevalence of <em>Chlamydia trachomatis</em> infection in pregnant women referred to a teaching hospital affiliated to Shiraz University of Medical Sciences. Urine samples were obtained from 210 pregnant women and investigated microscopically and macroscopically by urinalysis. Precipitants were also used for DNA extraction and PCR test for detecting <em>Chlamydia trachomatis.</em> Among 210 urine specimens from women aged 15-39 years, none were positive for <em>Chlamydia trachomatis </em>by PCR. In spite of the high sensitivity and specificity of PCR, and the elimination of inhibitory effects on PCR test, no pregnant woman was positive for <em>Chlamydia trachomatis</em>. Here, we suggest that a larger sample should be studied and other sensitive methods could also be used in the future.

Detection of Chlamydia trachomatis in Pregnant Women by the Papanicolaou Technique, Enzyme Immunoassay and Polymerase Chain Reaction

2000 ◽  
Vol 44 (2) ◽  
pp. 114-123 ◽  
Author(s):  
Carmen Adriana Bañuelos Pánuco ◽  
Irma Deleón Rodríguez ◽  
José Tomás Hernández Méndez ◽  
Lydia Alejandra Martínez Guzmán ◽  
David Akle Fierro ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Chlamydia Trachomatis ◽  
Pregnant Women ◽  
Enzyme Immunoassay ◽  
Chain Reaction ◽  
Polymerase Chain

scholarly journals POLYMERASE CHAIN REACTION AS A DIAGNOSTIC TOOL FOR SIX SEXUALLY TRANSMITTED INFECTIONS - PRELIMINARY RESULTS

2015 ◽  
Vol 88 (1) ◽  
pp. 33-37
Author(s):  
Alecsandra Iulia Grad ◽  
Mihaela Laura Vica ◽  
Horea Vladi Matei ◽  
Doru Lucian Grad ◽  
Ioan Coman ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Chlamydia Trachomatis ◽  
Neisseria Gonorrhoeae ◽  
Sexually Transmitted Infections ◽  
Sensitivity And Specificity ◽  
Diagnostic Tool ◽  
High Sensitivity ◽  
Chain Reaction ◽  
Sexually Transmitted ◽  
Polymerase Chain

Background and aim. Sexually transmitted infections are a very frequent and under-diagnosed cause of illness worldwide. A high number of detection methods and a large range of specimens in which sexually transmitted infections can be determined are available at the moment. Polymerase chain reaction performed on first void urine offers the advantage of being non-invasive, self-collectable and has high sensitivity and specificity. We looked to determine the frequency of Chlamydia trachomatis, Neisseria gonorrhoeae, Trichomonas vaginalis, Mycoplasma hominis, Mycoplasma genitalium and Ureaplasma urealyticum in symptomatic and asymptomatic patients.Methods. Six sexually transmitted infections were determined in the first void urine of 15 symptomatic and asymptomatic patients by polymerase chain reaction. We used “Epicenter MasterPure™ Complete DNA and RNA Purification Kit” for the DNA purification and “Seeplex® STD6 ACE Detection” for the DNA amplification. The results were examined in UV light.Results. A number of 5 patients had positive results for Chlamydia trachomatis or Neisseria gonorrhoeae. Sexually transmitted infections are more frequent in men between 27 and 40 years old.Conclusions. Polymerase chain reaction is a good diagnostic tool for sexually transmitted infections because it has a high sensitivity and specificity. Chlamydia trachomatis is the most frequent sexually transmitted infection, followed by Neisseria gonorrhoeae.

scholarly journals Laboratory detection of bacterial pathogens and clinical and laboratory response of syndromic management in patients with cervical discharge: A retrospective study

2021 ◽  
Vol 0 ◽  
pp. 1-5
Author(s):  
Deepika Yadav ◽  
Sanjay Singh ◽  
Benu Dhawan ◽  
Seema Sood ◽  
Somesh Gupta
Keyword(s):  
Polymerase Chain Reaction ◽  
Retrospective Study ◽  
Chlamydia Trachomatis ◽  
Small Sample Size ◽  
Bacterial Pathogens ◽  
Small Sample ◽  
World Health ◽  
Chain Reaction ◽  
Syndromic Management ◽  
Polymerase Chain

Background: Cervical discharge as part of cervicitis and pelvic inflammatory disease is a cause of significant morbidity in sexually active women worldwide. Non-gonococcal and non- chlamydial bacterial pathogens are becoming more prevalent. Aims: This study aims to determine bacterial pathogens causing cervical discharge using culture and/or polymerase chain reaction and assess the clinical and laboratory response to the conventional syndromic kit regimen established by the World Health Organisation. Methods: A retrospective review of records of women with cervical discharge over one year period. Culture and/or polymerase chain reaction results of endocervical swabs of various bacterial pathogens at baseline and after four weeks of treatment with syndromic kit regimen were recorded. Results: A total of 70 case records were reviewed for clinical details, out of which results of bacterial culture and polymerase chain reaction were available for 67 cases. Infectious aetiology was found in 30 (44.7%) patients with Ureaplasma species being the most common organism isolated on culture (18, 26.8%) and polymerase chain reaction (25, 37.3%), respectively. Polymerase chain reaction for Chlamydia trachomatis and Mycoplasma hominis was positive in ten (14.9%) and four (6%) cases, respectively. None of the patients showed positive culture for Neisseria gonorrhoeae. Coinfection was seen in eight (11.9%) patients with the majority showing Chlamydia trachomatis and Ureaplasma spp. coinfection (five patients). Forty one cases (58.5%) received tab. cefixime 400 mg and tab. azithromycin one gram stat (kit 1), while 29 cases (43.3%) received tab. cefixime 400 mg stat, tab. metronidazole 400 mg and cap. doxycycline 100 mg, both twice daily for 14 days (kit 6). Minimal to no clinical improvement with treatment was seen in 14 out of 32 cases (44%) at the end of four weeks with the conventional kit regimen. Post-treatment culture and/or polymerase chain reaction were positive in nine out of 28 cases (32.1%) with Ureaplasma spp. being the most common. Limitations: Retrospective study design, small sample size and fewer cases with follow-up data were the main limitations. Conclusion: Ureaplasma spp. was the most common infectious cause of cervical discharge in our patients. Treatment given as part of syndromic management led to a clinical and microbiological response in around half and two-third cases, respectively.

scholarly journals PERBANDINGAN DETEKSI PLASMODIUM SPP ANTARA METODE IMMUNOCHROMATOGRAPHIC ASSAY DENGAN METODE POLYMERASE CHAIN REACTION

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Johanes Nyoman D. Widiswara Mawan
Keyword(s):  
Polymerase Chain Reaction ◽  
Sensitivity And Specificity ◽  
World Health ◽  
Immunochromatographic Assay ◽  
Chain Reaction ◽  
Genus Plasmodium ◽  
The World ◽  
Rapid Tests ◽  
Polymerase Chain ◽  
Health Organization

Abstract: Malaria is caused by protozoa of the genus Plasmodium remains a health problem in the world, especially in tropical countries and subtropical. Incidence of malaria from the World Health Organization (WHO) shows that in 2010 as many as 219 million cases of clinical malaria episodes show and 660,000 of them died. Therefore we need a means of early diagnosis has a sensitivity and specificity are good. This study compared the sensitivity and specificity of detection of Plasmodium spp using Immunochromatographic Assay method commonly known as rapid inspection test and Polymerase Chain Reaction (PCR). This study is a diagnostic test with a sample of 30 people who were taken with random sampling method in malaria patients who come to Budi Mulia Hospital since September 2013 - November 2013. The sample is a blood specimen taken at the brachial vein previously given informed consent in patients with the triad of symptoms of malaria in the area of ​​Bitung, Manado. From the blood samples examined by PCR. The results of the rapid tests and PCR in the detection of Plasmodium spp diagnostic test is then performed to determine the level of sensitivity and specificity. Result: The level of sensitivity of rapid tests in general by 89,2%, specificity of 100%, a positive predictive value of 100% and a negative predictive value of 40%. Conclusions: The sensitivity is moderate but has high specificity. Keywords:   Immunochromatographic Assay, Polymerase Chain Reaction (PCR), rapid tests, sensitivity, specificity  Abstrak: Malaria yang disebabkan oleh protozoa dari genus Plasmodium masih menjadi masalah kesehatan di dunia terutama di negara- negara tropis dan subtropis. Kejadian malaria dari World Health Organization (WHO) menunjukan bahwa pada 2010 sebanyak 219 juta kasus menunjukan episode klinik malaria dan 660.000 diantaranya meninggal dunia. Oleh karena itu diperlukan suatu alat diagnosa dini yang memiliki sensitivitas dan spesifisitas yang yang baik. Penelitian ini membandingkan tingkat sensitivitas dan spesifisitas deteksi Plasmodium spp dengan menggunakan metode Immunochromatographic Assay yang biasa dikenal dengan pemeriksaan rapid tes dan Polymerase Chain Reaction (PCR). Penelitian ini merupakan penelitian uji diagnostik dengan sampel sejumlah 30 orang yang diambil secara random sampling pada pasien malaria yang datang ke RSU Budi Mulia sejak bulan September 2013 - November 2013. Sampel adalah spesimen darah yang diambil pada vena brachialis yang sebelumnya telah diberikan inform consent pada pasien dengan gejala trias malaria di daerah Bitung, Manado. Dari sampel darah tersebut dilakukan pemeriksaan dengan PCR. Hasil dari rapid tes dengan metode Immunochromatographic dan PCR dalam mendeteksi Plasmodium spp selanjutnya dilakukan uji diagnostik untuk mengetahui tingkat sensitivitas dan spesifisitasnya. Hasil : Tingkat sensitivitas rapid tes secara umum sebesar 89,2%, spesifisitas sebesar 100%, nilai duga positif sebesar 100% dan nilai duga negatif sebesar 40%. Simpulan: Nilai sensitivitas yang sedang tetapi  memiliki  nilai spesifisitas  yang tinggi. Kata Kunci : Immunochromatographic Assay, Polymerase Chain Reaction (PCR), rapid tes, sensitivitas, spesifisitas

UriSwab: an effective transport medium for nucleic acid detection of Chlamydia trachomatis, Mycoplasma genitalium and Neisseria gonorrhoeae

Sexual Health ◽  
2017 ◽  
Vol 14 (6) ◽  
pp. 502 ◽  
Author(s):  
Anna-Maria G. Costa ◽  
Suzanne M. Garland ◽  
Rebecca Guy ◽  
Handan Wand ◽  
Sepehr N. Tabrizi
Keyword(s):  
Polymerase Chain Reaction ◽  
Chlamydia Trachomatis ◽  
Neisseria Gonorrhoeae ◽  
Mixed Model ◽  
Mycoplasma Genitalium ◽  
Urine Samples ◽  
Sample Type ◽  
Chain Reaction ◽  
Increasing Trend ◽  
Polymerase Chain

Background Patient self-sampling allows for remote collection and return to clinic or laboratory by post. Urine samples, although convenient, are challenging to post. This study evaluated UriSwab (Copan, Brescia, Italy) as a collection and transport vessel for Chlamydia trachomatis (CT), Neisseria gonorrhoeae (NG) and Mycoplasma genitalium (MG) detection by polymerase chain reaction, compared with flocked swab and neat urine. Methods: Five replicates of each specimen type were prepared from previously characterised urine samples (n = 330), stored at room temperature (RT) or 37°C, then extracted on day 1, 3, 7, 10 and 16 (VERSANT kPCR Sample Prep System, Siemens, Munich, Germany). Crossing thresholds (Cq) from CT and NG detection (VERSANT CT/GC DNA 1.0 assay kit, Siemens) and MG detection (real-time polymerase chain reaction assay) were compared using logistic regression, stratified by sample type, temperature and analyte. Mixed-model statistical techniques were used to assess correlation between repeated observations. Results: UriSwab showed an increasing trend in Cq values at RT and 37°C for CT and NG, and RT for MG (all P < 0.01). UriSwab was not statistically significantly different to neat urine, except CT at RT (0.83, 95% confidence interval: 0.51–1.15). Flocked swab similarly showed increasing Cq values at 37°C for CT, a significant decreasing trend at RT for MG and increasing trend at 37°C for MG. Flocked swab was not statistically significantly different from neat urine at RT and 37°C for CT and MG. Conclusion: UriSwab allows transport of urine for CT, NG and MG detection regardless of storage time or temperature, suggesting that CT and NG are stable for up to 16 days and MG up to 10 days.

scholarly journals Polymerase chain reaction chlamydia trachomatis examination in nonspecific genital infection patients

2019 ◽  
Author(s):  
Dian Pertiwi Habibie ◽  
Dwi Murtiastutik ◽  
R. Rahmadewi
Keyword(s):  
Polymerase Chain Reaction ◽  
Chlamydia Trachomatis ◽  
Sensitivity And Specificity ◽  
High Sensitivity ◽  
Genital Infection ◽  
Chain Reaction ◽  
Causal Organism ◽  
Advanced Method ◽  
Polymerase Chain ◽  
Low Incidence

Introduction: Nonspecific genital infection (NSGI) is an inflammation of urethra, rectum, or cervix that caused by nonspecific bacteria. Chlamydia trachomatis is known as the most causal organism of NSGI, usually mild (mucopurulent discharge) or asymptomatic, and if untreated it can cause serious complication such as pelvic inflammatory disease that leads to infertility in women. The diagnosis of Chlamydia trachomatis needs an advanced method, such as polymerase chain reaction (PCR). PCR has high sensitivity and specificity, and endocervical swab is specimen of choice that also has high sensitivity and specificity to diagnose Chlamydia trachomatis. Method: This research aims to evaluate if Chlamydia trachomatis is the most causal organism of NSGI by PCR Chlamydia trachomatis using 201bp primers. Results: Eighteen NSGI married patients who came to outpatient clinic were evaluated from endocervical swab. The result demonstrated that 16,67% from eighteen NSGI patient positive Chlamydia trachomatis. Conclusion: The low incidence of Chlamydia trachomatis in low risk population such in this study need further study, the cause of NSGI needs to be known certainly so the exact treatment can be given.

Detection of the Glanzmann's Thrombasthenia Mutations in Arab and Iraqi-Jewish Patients by Polymerase Chain Reaction and Restriction Analysis of Blood or Urine Samples

1991 ◽  
Vol 66 (04) ◽  
pp. 500-504 ◽  
Author(s):  
H Peretz ◽  
U Seligsohn ◽  
E Zwang ◽  
B S Coller ◽  
P J Newman
Keyword(s):  
Polymerase Chain Reaction ◽  
Base Pair ◽  
Restriction Analysis ◽  
Urine Samples ◽  
Chain Reaction ◽  
Base Pairs ◽  
Glanzmann’S Thrombasthenia ◽  
Glanzmann's Thrombasthenia ◽  
Base Pair Deletion ◽  
Polymerase Chain

SummarySevere Glanzmann's thrombasthenia is relatively frequent in Iraqi-Jews and Arabs residing in Israel. We have recently described the mutations responsible for the disease in Iraqi-Jews – an 11 base pair deletion in exon 12 of the glycoprotein IIIa gene, and in Arabs – a 13 base pair deletion at the AG acceptor splice site of exon 4 on the glycoprotein IIb gene. In this communication we show that the Iraqi-Jewish mutation can be identified directly by polymerase chain reaction and gel electrophoresis. With specially designed oligonucleotide primers encompassing the mutation site, an 80 base pair segment amplified in healthy controls was clearly distinguished from the 69 base pair segment produced in patients. Patients from 11 unrelated Iraqi-Jewish families had the same mutation. The Arab mutation was identified by first amplifying a DNA segment consisting of 312 base pairs in controls and of 299 base pairs in patients, and then digestion by a restriction enzyme Stu-1, which recognizes a site that is absent in the mutant gene. In controls the 312 bp segment was digested into 235 and 77 bp fragments, while in patients there was no change in the size of the amplified 299 bp segment. The mutation was found in patients from 3 out of 5 unrelated Arab families. Both Iraqi-Jewish and Arab mutations were detectable in DNA extracted from blood and urine samples. The described simple methods of identifying the mutations should be useful for detection of the numerous potential carriers among the affected kindreds and for prenatal diagnosis using DNA extracted from chorionic villi samples.

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