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Choi G, Song KS, Nimse SB, Kim T. Development of a DNA-Based Lateral Flow Strip Membrane Assay for Rapid Screening and Genotyping of Six High-Incidence STD Pathogens. BIOSENSORS 2024; 14:260. [PMID: 38785734 PMCID: PMC11118844 DOI: 10.3390/bios14050260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/06/2024] [Accepted: 05/17/2024] [Indexed: 05/25/2024]
Abstract
Sexually transmitted diseases (STDs) are a global concern because approximately 1 million new cases emerge daily. Most STDs are curable, but if left untreated, they can cause severe long-term health implications, including infertility and even death. Therefore, a test enabling rapid and accurate screening and genotyping of STD pathogens is highly awaited. Herein, we present the development of the DNA-based 6STD Genotyping 9G Membrane test, a lateral flow strip membrane assay, for the detection and genotyping of six STD pathogens, including Trichomonas vaginalis, Ureaplasma urealyticum, Neisseria gonorrhoeae, Chlamydia trachomatis, Mycoplasma hominis, and Mycoplasma genitalium. Here, we developed a multiplex PCR primer set that allows PCR amplification of genomic materials for these six STD pathogens. We also developed the six ssDNA probes that allow highly efficient detection of the six STD pathogens. The 6STD Genotyping 9G Membrane test lets us obtain the final detection and genotyping results in less than 30 m after PCR at 25 °C. The accuracy of the 6STD Genotyping 9G membrane test in STD genotyping was confirmed by its 100% concordance with the sequencing results of 120 clinical samples. Therefore, the 6STD Genotyping 9G Membrane test emerges as a promising diagnostic tool for precise STD genotyping, facilitating informed decision-making in clinical practice.
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Affiliation(s)
- Gunho Choi
- Biometrix Technology, Inc., 2-2 Bio Venture Plaza 56, Chuncheon 24232, Republic of Korea; (G.C.); (K.-S.S.)
| | - Keum-Soo Song
- Biometrix Technology, Inc., 2-2 Bio Venture Plaza 56, Chuncheon 24232, Republic of Korea; (G.C.); (K.-S.S.)
| | - Satish Balasaheb Nimse
- Institute of Applied Chemistry and Department of Chemistry, Hallym University, Chuncheon 24252, Republic of Korea
| | - Taisun Kim
- Institute of Applied Chemistry and Department of Chemistry, Hallym University, Chuncheon 24252, Republic of Korea
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Leos-Alvarado C, Llaca-Díaz J, Flores-Aréchiga A, Pérez-Chávez F, Casillas-Vega N. Male urethritis. A review of the ideal diagnostic method. Actas Urol Esp 2020; 44:523-528. [PMID: 32684296 DOI: 10.1016/j.acuro.2019.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/20/2019] [Accepted: 11/19/2019] [Indexed: 10/23/2022]
Abstract
Male urethritis is an inflammation of the urethra and the periurethral glands; it is widely classified as gonococcal or non-gonococcal. The most frequent microorganisms responsible are Chlamydia trachomatis, Neisseria gonorrhoeae, Mycoplasma genitalium, Mycoplasma hominis, Ureaplasma urealyticum, and Ureaplasma parvum. In the last three decades, the diagnosis of sexually transmitted diseases depended almost exclusively on traditional methods, such as culture, enzyme immunoassay, fluorescent antibody staining, and hybridization, until the appearance of molecular techniques. Clinical syndromes such as urethritis are rarely specific for a single microorganism, so screening strategies should allow multiple agents to be considered. Multiplex PCR is the fastest and most sensitive technique for the diagnosis of gonococcal and non-gonococcal urethritis. Male urethritis without treatment is one of the main health problems related to reproductive and sexual function, constituting one of the main causes of infertility. The objective of this mini-review was to analyze the epidemiology, causes, diagnosis, and complications of male urethritis.
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Abiodun-Ojo OA, Guerra-Infante FM, Taylor BD. Identification of Mycoplasma genitalium among Mexican women using the Seeplex STD6 ACE Detection kit: are results accurate? Int J STD AIDS 2020; 30:1450-1451. [PMID: 31795924 DOI: 10.1177/0956462419862451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Olayinka A Abiodun-Ojo
- Department of Epidemiology and Biostatistics, Texas A&M University, College Station, TX, USA.,Emory University School of Medicine, Atlanta, GA, USA
| | - Fernando M Guerra-Infante
- Virology Laboratory of the National Institute of Perinatology, Mexico City, Mexico.,Department of Microbiology, National School of Biological Sciences of the National Polytechnic Institute, Mexico City, Mexico
| | - Brandie DePaoli Taylor
- Department of Epidemiology and Biostatistics, Texas A&M University, College Station, TX, USA.,Department of Epidemiology and Biostatistics, Temple University, Philadelphia, PA, USA
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Ezeanya CC, Agbakoba NR, Enweani IB, Oguejiofor C. Predominance of cervicitis agents with minimal testing rate within the student population in Benin city, Nigeria. J OBSTET GYNAECOL 2019; 39:840-844. [PMID: 31007108 DOI: 10.1080/01443615.2019.1584888] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Here, we aimed to investigate the predominance of cervicitis agents with minimal testing rates among asymptomatic students in a Tertiary Institution and its associated risk factors. Endocervical swabs were collected from randomly selected 133 female students (15-34 years of age) in Benin City, Nigeria and screened for six genital pathogens (Chlamydia trachomatis, Mycoplasma hominis, M. genitalium, Ureaplasma urealyticum, U. parvum and Trichomonas vaginalis) using multiplex PCR. Out of the 133 subjects, 80 were positive for cervicitis with 46.3% of its agents. Five different species of the pathogens were identified with highest and lowest prevalence as: T. vaginalis (71.0%) and U. urealyticum (6.45%). Co-infection had predominance of 19.35 and 9.67% for three-organism and two-organism colonisation respectively. Strong associations were observed between the presence of cervicitis and co-infection with other genital pathogens, abortion, inconsistent condom use (p < .05). The high occurrence of cervicitis agents in our study combined with asymptomatic outcome among the subjects justifies screening for these pathogens in this population. Impact statement What is already known on this subject? Cervicitis is a genital condition among reproductive age women. It is characterised by inflammation of the uterine cervix which subsequently promotes the acquisition of certain genital conditions such as infertility and sexually transmitted infections. In various studies, there have been reports on 30-40% of cervicitis cases associated with known pathogens but left undetected within the general population. Studies have shown that majority of the cervicitis cases presents in an asymptomatic state. What the results of this study add? There may be some risk associated factors promoting the acquisition of cervicitis agents within the student population since the prevalence of these agents in this population which is underrated was relatively high. What the implication are of these findings for clinical practice and/or further research? Further investigation is needed to define the prospective influence of microbial load in colonisation of the organism and the association of new and higher sexual partners as their prevalence are not fully understood. Furthermore, our finding recommend inclusion of screening exercise for cervicitis agents within the student population which will control the infection, thereby improving female reproductive health, consequently limiting spread and serious sequelae.
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Affiliation(s)
- Chinyere Charity Ezeanya
- a Department of Medical Laboratory Science , Nnamdi Azikiwe University , Awka , Nigeria.,b Department of Medical Microbiology , Edo University Iyamho , Nigeria
| | - Nneka Regina Agbakoba
- a Department of Medical Laboratory Science , Nnamdi Azikiwe University , Awka , Nigeria
| | - Ifeoma Bessie Enweani
- a Department of Medical Laboratory Science , Nnamdi Azikiwe University , Awka , Nigeria
| | - Charlotte Oguejiofor
- c Department of Obstetrics and Gynaecology , Nnamdi Azikiwe University Teaching Hospital , Nnewi , Nigeria
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Escobedo-Guerra MR, Katoku-Herrera M, Lopez-Hurtado M, Gutierrez-Trujillo R, Guerra-Infante FM. Use of the mtrR Gene for Rapid Molecular Diagnosis of Neisseria gonorrhoeae and Identification of the Reduction of Susceptibility to Antibiotics in Endocervical Swabs. Mol Diagn Ther 2018; 22:361-368. [PMID: 29589256 DOI: 10.1007/s40291-018-0328-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Neisseria gonorrhoeae is one of the main etiological agents of sexually transmitted diseases. The asymptomatic course of the infection and its resistance to antibiotics can lead to pelvic inflammatory disease and infertility. OBJECTIVES We developed a polymerase chain reaction (PCR) test using the methyltetrahydrofolate homocysteine methyltransferase reductase (mtrR) gene to identify N. gonorrhoeae and detect reduced susceptibility to antibiotics. MATERIAL AND METHODS We analysed 250 samples of endocervical exudate from infertile women with a negative diagnosis of N. gonorrhoeae. We designed NGmtr primers to detect N. gonorrhoeae and identify the antibiotic-resistant strain. RESULTS Of the 250 samples, 60 (24%) tested positive for N. gonorrhoeae using real-time PCR. Our study was validated using the HO primers and the Seeplex STD6 ACE System, with a 100% correlation. Furthermore, the NGmtr primers are specific for N. gonorrhoeae and not for other species. Additionally, the curves generated by real-time PCR differed between wild and variant strains (10.93%). The dissociation temperatures for the wild and variant strains were 86.5 and 89 °C, respectively. CONCLUSIONS The NGmtr primers enabled us to identify N. gonorrhoeae strains with or without reduction of susceptibility to antibiotics. Therefore, this work constitutes a tool that will facilitate the diagnosis of this infection for a low cost and improve patient quality of life.
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Affiliation(s)
- Marcos R Escobedo-Guerra
- Departamento de Infectología, Instituto Nacional de Perinatología, Montes Urales No. 800, Colonia Lomas de Virreyes, Miguel Hidalgo, CP 11000, Mexico City, Mexico
| | - Mitzuko Katoku-Herrera
- Departamento de Infectología, Instituto Nacional de Perinatología, Montes Urales No. 800, Colonia Lomas de Virreyes, Miguel Hidalgo, CP 11000, Mexico City, Mexico
| | - Marcela Lopez-Hurtado
- Departamento de Infectología, Instituto Nacional de Perinatología, Montes Urales No. 800, Colonia Lomas de Virreyes, Miguel Hidalgo, CP 11000, Mexico City, Mexico
| | - Rodrigo Gutierrez-Trujillo
- Departamento de Infectología, Instituto Nacional de Perinatología, Montes Urales No. 800, Colonia Lomas de Virreyes, Miguel Hidalgo, CP 11000, Mexico City, Mexico
| | - Fernando M Guerra-Infante
- Departamento de Infectología, Instituto Nacional de Perinatología, Montes Urales No. 800, Colonia Lomas de Virreyes, Miguel Hidalgo, CP 11000, Mexico City, Mexico.
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Momčilović S, Cantacessi C, Arsić-Arsenijević V, Otranto D, Tasić-Otašević S. Rapid diagnosis of parasitic diseases: current scenario and future needs. Clin Microbiol Infect 2018; 25:290-309. [PMID: 29730224 DOI: 10.1016/j.cmi.2018.04.028] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/22/2018] [Accepted: 04/24/2018] [Indexed: 01/05/2023]
Abstract
BACKGROUND Parasitic diseases are one of the world's most devastating and prevalent infections, causing millions of morbidities and mortalities annually. In the past, many of these infections have been linked predominantly to tropical or subtropical areas. Nowadays, however, climatic and vector ecology changes, a significant increase in international travel, armed conflicts, and migration of humans and animals have influenced the transmission of some parasitic diseases from 'book pages' to reality in developed countries. It has also been noted that many patients who have never travelled to endemic areas suffer from blood-borne infections caused by protozoa. In the light of existing knowledge, this new trend can be explained by the fact that in the process of migration a large number of asymptomatic carriers become a part of the blood bank donor and transplant donor populations. Accurate and rapid diagnosis represents the crucial weapon in the fight against parasitic infections. AIMS To review old and new approaches for rapid diagnosis of parasitic infections. SOURCES Data for this review were obtained through searches of PubMed using combinations of the following terms: parasitological diagnostics, microscopy, lateral flow assays, immunochromatographic assays, multiplex-PCR, and transplantation. CONTENT In this review, we provide a brief account of the advantages and limitations of rapid methods for diagnosis of parasitic diseases and focus our attention on current and future research in this area. The approximate costs associated with the use of different techniques and their applicability in endemic and non-endemic areas are also discussed. IMPLICATIONS Microscopy remains the cornerstone of parasitological diagnostics, especially in the field and low-resource settings, and provides epidemiological assessment of parasite burden. However, increased use and availability of point-of-care tests and molecular assays in modern era allow more rapid and accurate diagnoses and increased sensitivity in the identification of parasitic infections.
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Affiliation(s)
- S Momčilović
- Department of Microbiology and Immunology, Faculty of Medicine, University of Niš, Serbia.
| | - C Cantacessi
- Department of Veterinary Medicine, University of Cambridge, UK
| | - V Arsić-Arsenijević
- Department for Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Serbia
| | - D Otranto
- Dipartimento di Medicina Veterinaria, Università degli Studi di Bari, Italy
| | - S Tasić-Otašević
- Department of Microbiology and Immunology, Faculty of Medicine, University of Niš, Serbia; Center of Microbiology and Parasitology, Public Health Institute Niš, Serbia
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Otašević S, Momčilović S, Stojanović NM, Skvarč M, Rajković K, Arsić-Arsenijević V. Non-culture based assays for the detection of fungal pathogens. J Mycol Med 2018; 28:236-248. [PMID: 29605542 PMCID: PMC7110445 DOI: 10.1016/j.mycmed.2018.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 03/05/2018] [Accepted: 03/05/2018] [Indexed: 01/05/2023]
Abstract
Traditional, culture based methods for the diagnosis of fungal infections are still considered as gold standard, but they are time consuming and low sensitive. Therefore, in order to overcome the limitations, many researchers have focused on the development of new immunological and molecular based rapid assays that could enable early diagnosis of infection and accurate identification of fungal pathogens causing superficial and invasive infection. In this brief review, we highlighted the advantages and disadvantages of conventional diagnostic methods and possibility of non-culture based assays in diagnosis of superficial fungal infections and presented the overview on currently available immunochromatographic assays as well as availability of biomarkers detection by immunodiagnostic procedures in prompt and accurate diagnosis of invasive fungal infections. In addition, we presented diagnostic efficiency of currently available molecular panels and researches in this area.
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Affiliation(s)
- S Otašević
- Center of Microbiology and Parasitology, Public Health Institute Niš, Serbia, boulevard Zorana Djindjica 50, 18000 Niš, Serbia; Department of Microbiology and Immunology, Faculty of Medicine, University of Niš, Serbia, boulevard Zorana Djindjica 81, 18000 Niš, Serbia.
| | - S Momčilović
- Department of Microbiology and Immunology, Faculty of Medicine, University of Niš, Serbia, boulevard Zorana Djindjica 81, 18000 Niš, Serbia
| | - N M Stojanović
- Faculty of Medicine, University of Niš, Serbia, boulevard Zorana Djindjica 81, 18000 Niš, Serbia
| | - M Skvarč
- University of Ljubljana, Faculty of Medicine, Institute of Microbiology and Immunology, Zaloska 4, Ljubljana, Slovenia
| | - K Rajković
- High Chemical and Technological School for Professional Studies, Kosančićeva 36, 37000 Kruševac, Serbia
| | - V Arsić-Arsenijević
- Department for Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Serbia, Dr Subotića 1, 11000 Belgrade, Serbia
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Safarkar R, Mehrabadi JF, Noormohammadi Z, Mirnejad R. Development a rapid and accurate multiplex real time PCR method for the detection Chlamydia trachomatis and Mycoplasma hominis. J Clin Lab Anal 2017; 31. [PMID: 28238212 DOI: 10.1002/jcla.22126] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 11/29/2016] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Sexually transmitted diseases easily spread among sexually active people and often have no symptoms. Rapid and accurate method for detecting these infections are necessary in early stages. The traditional detection methods of them are difficult and time-consuming. METHODS In this study, multiplex real time PCR was optimized for rapid identification of Chlamydia trachomatis and Mycoplasma hominis in a single tube and was performed with our designed primers. The sensitivity test was carried out to designed primers with diluted genomic DNA. To defined the specificity, non STD bacteria were used as DNA template. RESULTS This study indicated that the developed multiplex real time PCR can be an effective alternative procedure to the conventional methods for rapid and accurate identification of C Chlamydia trachomatis and Mycoplasma hominis. Multiplex real-time PCR Results of them were checked with melting curves. The sensitivity of our designed primer by multiplex real time PCR for Chlamydia trachomatis and Mycoplasma hominis were 4.78×1010 and 8.35×1010 , respectively, Which the primers did not amplify any product from a non-STD species. CONCLUSIONS Multiplex real time PCR by our new primers and analysis of melting curves were successfully usable for rapid and accurate detection of Chlamydia trachomatis and Mycoplasma hominis. This assay instead of traditional culture method, has considerable potential to be rapid, accurate and highly sensitive molecular diagnostic tool for simultaneous and direct detection.
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Affiliation(s)
- Roya Safarkar
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Zahra Noormohammadi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Reza Mirnejad
- Molecular Biology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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Wang X, Zhang M. Integrated Chinese and Western medicine for treatment of cerebral hemorrhage with gastrointestinal hemorrhage: Curative effect and influence on prognosis. Shijie Huaren Xiaohua Zazhi 2017; 25:392-395. [DOI: 10.11569/wcjd.v25.i4.392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM To observe the clinical effect of integrated Chinese and Western medicine in the treatment of cerebral hemorrhage with gastrointestinal hemorrhage and its influence on prognosis.
METHODS Seventy patients with cerebral hemorrhage and gastrointestinal bleeding were randomly divided into a control group (n = 35) and an observation group (n = 35). Both groups were treated with hemocoagulase and omeprazole injection, and the observation group was additionally given Xijiao Dihuang decoction. Clinical curative effect and prognosis were compared between the two groups.
RESULTS The duration of continued bleeding and intracranial hypertension, the amount of blood transfusion, NIHSS score, survival rate, and mortality rate were significantly lower in the observation group than in the control group (t = 17.935, 18.293, 16.386, and 20.915, χ2 = 5.193, 7.012, P < 0.05). The hemoglobin level, MBI score, and improvement rate were significantly higher in the observation group than in the control group (t = 21.284, 19.841, χ2 = 6.395, P < 0.05).
CONCLUSION Hemocoagulase and omeprazole injection combined with Xijiao Dihuang decoction are effective in the treatment of cerebral hemorrhage with gastrointestinal bleeding.
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Lian DS, Zhao SJ. Capillary electrophoresis based on nucleic acid detection for diagnosing human infectious disease. Clin Chem Lab Med 2017; 54:707-38. [PMID: 26352354 DOI: 10.1515/cclm-2015-0096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 06/17/2015] [Indexed: 01/22/2023]
Abstract
Rapid transmission, high morbidity, and mortality are the features of human infectious diseases caused by microorganisms, such as bacteria, fungi, and viruses. These diseases may lead within a short period of time to great personal and property losses, especially in regions where sanitation is poor. Thus, rapid diagnoses are vital for the prevention and therapeutic intervention of human infectious diseases. Several conventional methods are often used to diagnose infectious diseases, e.g. methods based on cultures or morphology, or biochemical tests based on metabonomics. Although traditional methods are considered gold standards and are used most frequently, they are laborious, time consuming, and tedious and cannot meet the demand for rapid diagnoses. Disease diagnosis using capillary electrophoresis methods has the advantages of high efficiency, high throughput, and high speed, and coupled with the different nucleic acid detection strategies overcomes the drawbacks of traditional identification methods, precluding many types of false positive and negative results. Therefore, this review focuses on the application of capillary electrophoresis based on nucleic detection to the diagnosis of human infectious diseases, and offers an introduction to the limitations, advantages, and future developments of this approach.
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Hao QQ. Comprehensive nursing care combined with conventional nursing care for prevention of emergency events during transportation of patients with gastric carcinoma. Shijie Huaren Xiaohua Zazhi 2017; 25:267-270. [DOI: 10.11569/wcjd.v25.i3.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM To observe the effect of comprehensive care combined with routine nursing care in preventing emergency events during the transportation of patients with gastric cancer.
METHODS From December 2015 to August 2016, 80 patients with gastric cancer were randomly divided into a control group (n = 40) and an observation group (n = 40). In the control group, routine nursing was given during the transportation, and comprehensive nursing care was given in the observation group. The nursing effects of the two groups were compared.
RESULTS The incidence of emergency events in the observation group was significantly lower than that in the control group (7.50% vs 20.00%, χ2 = 6.014, P < 0.05). There was no significant difference in anxiety or depression scores between the two groups either before (t = 1.294, 0.593, P > 0.05) or after nursing (34.12 ± 2.03 vs 43.24 ± 2.31, 36.01 ± 1.99 vs 40.93 ± 2.03, t = 22.192, 19.293, P < 0.05). The nursing satisfaction rate of the observation group was higher than that of the control group (97.50% vs 87.50%, χ2 = 5.396, P < 0.05).
CONCLUSION Comprehensive nursing care combined with conventional nursing care can reduce the incidence of emergency events during transportation of patients with gastric carcinoma.
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Vila J, Gómez MD, Salavert M, Bosch J. [Methods of rapid diagnosis in clinical microbiology: Clinical needs]. Enferm Infecc Microbiol Clin 2016; 35:41-46. [PMID: 27993417 DOI: 10.1016/j.eimc.2016.11.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 11/16/2016] [Indexed: 11/30/2022]
Abstract
The diagnostic methods of infectious diseases should be fast, accurate, simple and affordable. The speed of diagnosis can play a crucial role in healing the patient, allowing the administration of appropriate antibiotic treatment. One aspect that increasingly determines the need for rapid diagnostic techniques is the increased rates of serious infections caused by multidrug resistant bacteria, which cause a high probability of error in the empirical treatment. Some of the conventional methods such as Gram staining or antigen detection can generate results in less than 1 hour but lack sensitivity. Today we are witnessing a major change in clinical microbiology laboratories with the technological advances such as molecular diagnostics, digital microbiology and mass spectrometry. There are several studies showing that these changes in the microbiological diagnosis reduce the generation time of the test results, which has an obvious clinical impact. However, if we look into the future, other new technologies which will cover the needs required for a rapid microbiological diagnosis are on the horizon. This review provides an in depth analysis of the clinical impact that the implementation of rapid diagnostic techniques will have on unmet clinical needs.
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Affiliation(s)
- Jordi Vila
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, España; Servicio de Microbiología, Centro de Diagnóstico Biomédico, Hospital Clínic, Barcelona, España.
| | - María Dolores Gómez
- Servicio de Microbiología, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Miguel Salavert
- Unidad de Enfermedades Infecciosas, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Jordi Bosch
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, España; Servicio de Microbiología, Centro de Diagnóstico Biomédico, Hospital Clínic, Barcelona, España
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Puerta Suárez J, Cardona Maya WD. Prevalencia de Chlamydia trachomatis, Neisseria gonorrhoeae y Ureaplasma urealyticum en muestras de semen: efectos sobre la calidad espermática. Rev Urol 2016. [DOI: 10.1016/j.uroco.2016.02.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Gottesman T, Yossepowitch O, Samra Z, Rosenberg S, Dan M. Prevalence of Mycoplasma genitalium in men with urethritis and in high risk asymptomatic males in Tel Aviv: a prospective study. Int J STD AIDS 2016; 28:127-132. [PMID: 26826161 DOI: 10.1177/0956462416630675] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We sought to investigate the prevalence of Mycoplasma genitalium, Chlamydia trachomatis, Neisseria gonorrhoeae, and Trichomonas vaginalis in men presenting to a sexually transmitted infection (STI) clinic, with special attention to M. genitalium, its occurrence in Israeli patients, coinfections, and risk factors. In a cross-sectional study, 259 men were successively enrolled in the Tel Aviv Levinsky Clinic for STIs between November 2008 and November 2010. There were 118 men with urethritis and 141 high-risk men without symptoms. M. genitalium, C. trachomatis, N. gonorrhoeae, and T. vaginalis were detected using nucleic acid amplification tests. Demographic characteristics and risk factors were documented. The overall prevalence of infection with M. genitalium, C. trachomatis, N. gonorrhoeae, and T. vaginalis, were 6.6%, 12.7%, 23.1%, and 0%, respectively. Prevalences in men with urethritis were 11.9%, 22%, and 49%, for M. genitalium, C. trachomatis, and N. gonorrhoeae, respectively. Prevalences in men without symptoms were 2.1%, 5.0%, and 1.4%, for M. genitalium, C. trachomatis, and N. gonorrhoeae, respectively. Co-infections were found only in symptomatic individuals, in whom 5.9% were infected concomitantly with C. trachomatis and N. gonorrhoeae, and 2.5% had dual infection with M. genitalium and N. gonorrhoeae. N. gonorrhoeae, C. trachomatis, and M. genitalium were significantly more prevalent in patients with urethritis. M. genitalium was significantly more prevalent in the heterosexual population than in homosexual males. To conclude, we have found that M. genitalium infection is associated with urethritis in Israeli men, and more so in the heterosexual population. Testing men for M. genitalium as a cause of non-gonococcal urethritis is warranted, particularly because of its poor response to doxycycline and possible failure of azithromycin.
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Affiliation(s)
- Tamar Gottesman
- 1 Infectious Diseases Unit, E. Wolfson Hospital, Holon, Israel.,2 Levinsky STD Clinic, Ministry of Health, Tel Aviv, Israel
| | - Orit Yossepowitch
- 1 Infectious Diseases Unit, E. Wolfson Hospital, Holon, Israel.,2 Levinsky STD Clinic, Ministry of Health, Tel Aviv, Israel
| | - Zmira Samra
- 3 Department of Clinical Microbiology, Chlamydia and Mycoplasma National Center, Rabin Medical Center, Petach Tikva, Israel.,4 Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Shoshana Rosenberg
- 3 Department of Clinical Microbiology, Chlamydia and Mycoplasma National Center, Rabin Medical Center, Petach Tikva, Israel
| | - Michael Dan
- 1 Infectious Diseases Unit, E. Wolfson Hospital, Holon, Israel.,4 Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Esen B, Gozalan A, Sevindi DF, Demirbas A, Onde U, Erkayran U, Karakoc AE, Hasçiçek AM, Ergün Y, Adiloglu AK. Ureaplasma urealyticum: Presence among Sexually Transmitted Diseases. Jpn J Infect Dis 2016; 70:75-79. [PMID: 27000449 DOI: 10.7883/yoken.jjid.2015.258] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The aim of this study was to detect the presence of Chlamydia trachomatis, Neisseria gonorrhoeae, Mycoplasma genitalium, Mycoplasma hominis, Trichomonas vaginalis, and Ureaplasma urealyticum in genital specimens of symptomatic patients. This study also examined the role of U. urealyticum in infections of the lower genital tract. Cervical and urethral samples from 96 patients (46 males, 50 females) were tested using the Seeplex(®) STD6 ACE kit. Consent forms were received and a questionnaire was applied. All statistical analyses were performed using the SPSS statistical software program (version 17.0). Among the samples tested, at least 1 pathogen was detected in 49% of the samples; specifically, the rate of detection of U. urealyticum, M. hominis, C. trachomatis, N. gonorrhoeae, M. genitalium, and T. vaginalis was 29.1%, 10.4%, 8.3%, 7.3%, 6.3%, and 4.2%, respectively. U. urealyticum was detected as the sole pathogen in samples from 10% of female patients and 28.3% of male patients (p = 0.035). U. urealyticum was present in 54.5% (18/33) of samples in which a single pathogen was detected and 71.4% (10/14) of samples in which multiple pathogens were detected. Among men, significant differences in discharge, dysuria, and pruritus were not noted among those with negative results (84.6%, 69.2%, and 38.5%, respectively), among those positive for only U. urealyticum (100%, 66.7%, and 26.7%, respectively), and those positive for N. gonorrhoeae, C. trachomatis, M. genitalium, and T. vaginalis (100%, 93.3%, and 26.7%, respectively). Detection of U. urealyticum, either alone or together with other pathogens, in a symptomatic group of patients is an important finding, particularly in men.
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Affiliation(s)
- Berrin Esen
- Department of Medical Microbiology, Republic of Turkey Ministry of Health Atatruk Training and Research Hospital
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Goo YK, Shin WS, Yang HW, Joo SY, Song SM, Ryu JS, Lee WM, Kong HH, Lee WK, Lee SE, Lee WJ, Chung DI, Hong Y. Prevalence of Trichomonas vaginalis in Women Visiting 2 Obstetrics and Gynecology Clinics in Daegu, South Korea. THE KOREAN JOURNAL OF PARASITOLOGY 2016; 54:75-80. [PMID: 26951983 PMCID: PMC4792318 DOI: 10.3347/kjp.2016.54.1.75] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 12/04/2015] [Accepted: 12/26/2015] [Indexed: 11/24/2022]
Abstract
This study explored epidemiological trends in trichomoniasis in Daegu, South Korea. Wet mount microscopy, PCR, and multiplex PCR were used to test for Trichomonas vaginalis in vaginal swab samples obtained from 621 women visiting 2 clinics in Daegu. Of the 621 women tested, microscopy detected T. vaginalis in 4 (0.6%) patients, PCR detected T. vaginalis in 19 (3.0%) patients, and multiplex PCR detected T. vaginalis in 12 (1.9%) patients. Testing via PCR demonstrated high sensitivity and high negative predictive value for T. vaginalis. Among the 19 women who tested positive for T. vaginalis according to PCR, 94.7% (18/19) reported vaginal signs and symptoms. Notably, more than 50% of T. vaginalis infections occurred in females younger than 30 years old, and 58% were unmarried. Multiplex PCR, which simultaneously detects pathogens from various sexually transmitted infections, revealed that 91.7% (11/12) of patients were infected with 2 or more pathogens. Mycoplasma hominis was the most prevalent co-infection pathogen with T. vaginalis, followed by Ureaplasma urealyticum and Chlamydia trachomatis. Our results indicate that PCR and multiplex PCR are the most sensitive tools for T. vaginalis diagnosis, rather than microscopy which has been routinely used to detect T. vaginalis infections in South Korea. Therefore, clinicians should take note of the high prevalence of T. vaginalis infections among adolescent and young women in order to prevent persistent infection and transmission of this disease.
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Affiliation(s)
- Youn-Kyoung Goo
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Won-Sik Shin
- Department of Obstetrics and Gynecology, Shinsegae Women's Hospital, Daegu 41535, Korea
| | - Hye-Won Yang
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - So-Young Joo
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Su-Min Song
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Jae-Sook Ryu
- Department of Environmental Biology & Medical Parasitology, Hanyang University College of Medicine, Seoul 04763, Korea
| | - Won-Myung Lee
- Department of Obstetrics and Gynecology, Rosemary Hospital, Daegu 41422, Korea
| | - Hyun-Hee Kong
- Department of Parasitology, Dong-A University College of Medicine, Busan 49201, Korea
| | - Won-Ki Lee
- Center of Biostatistics, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Sang-Eun Lee
- Division of Malaria and Parasitic Diseases, Korea National Institute of Health, Korea Centers for Diseases Control and Prevention, Osong 28159, Korea
| | - Won-Ja Lee
- Division of Malaria and Parasitic Diseases, Korea National Institute of Health, Korea Centers for Diseases Control and Prevention, Osong 28159, Korea
| | - Dong-Il Chung
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Yeonchul Hong
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
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Ashshi AM, Batwa SA, Kutbi SY, Malibary FA, Batwa M, Refaat B. Prevalence of 7 sexually transmitted organisms by multiplex real-time PCR in Fallopian tube specimens collected from Saudi women with and without ectopic pregnancy. BMC Infect Dis 2015; 15:569. [PMID: 26666587 PMCID: PMC4678466 DOI: 10.1186/s12879-015-1313-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Accepted: 12/08/2015] [Indexed: 02/03/2023] Open
Abstract
Background Ectopic pregnancy (EP) is associated with maternal morbidity and occasionally mortality during the first trimester. A history of sexually transmitted infection (STI) and pelvic inflammatory disease have been implicated as major risk factors for EP. Our aim was to measure the prevalence of Chlamydia trachomatis (CT), Neisseria gonorrhoeae, Mycoplasma genitalium (MG), Ureaplasma parvum/urealyticum, Gardnerella vaginalis, Trichomonas vaginalis and herpes simplex virus (HSV)-1&2 in Fallopian tubes collected from EP and the results were compared with those obtained from total abdominal hysterectomy (TAH) and tubal ligation. Methods This was a prospective case–control study and tubal samples were collected from 135 Saudi women recruited from 3 centres in the Western region as follow: 84 EPs, 20 TAH and 31 tubal ligations. Multiplex TaqMan PCR was performed using an IVD CE kit for the simultaneous detection of candidate pathogens following DNA extraction. Results Infections were detected in 31.8 % of the 135 participants either as single (11.1 %) or co-infections (20.7 %) and the frequencies were significantly higher in EP (42.85 %) compared with control (13.72 %). The rates of CT (27.4 %; P = 0.001); MG (20.2 %; P = 0.009) and HSV-1/2 (21.4 %; P = 0.01) were significantly higher in EP. No significant difference between the study groups was observed for the other pathogens (P > 0.05). Binary logistic regression also showed that infection with ≥ 2 pathogens (OR 4.9; 95 % CI: 2.2 – 11.6; P = 0.006), CT (OR 3.07; 95 % CI: 1.3 – 12.3; P = 0.002), MG (OR 2.3; 95 % CI: 1.1 – 8.6; P = 0.03) and HSV-1/2 (OR 1.7; 95 % CI: 0.75 – 5.7; P = 0.004) were associated with a significantly higher risk of developing EP. Conclusions STIs are frequent in the upper genital tract of Saudi women during the reproductive age and, CT, MG and HSV-1/2 were more prevalent in EP. The observed high rates of co-infection advocate the necessity of establishing national guidelines and/or screening program utilising multiplex PCR approach for the detection of common STIs among high risk groups in the kingdom. Further studies are needed to measure the adverse reproductive outcomes associated with STIs in Saudi Arabia.
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Affiliation(s)
- Ahmed Mohamed Ashshi
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Al Abdeyah, Makkah, PO Box 7607, KSA.
| | - Sarah Abdullah Batwa
- Obstertics and Gynaecology Department, Maternity and Children Hospital, Al-Aziziyah, Jeddah, KSA.
| | - Seham Yahia Kutbi
- Obstertics and Gynaecology Department, Maternity and Children Hospital, Al-Aziziyah, Jeddah, KSA.
| | - Faizah Ahmed Malibary
- Obstertics and Gynaecology Department, Maternity and Children Hospital, Al-Aziziyah, Jeddah, KSA.
| | | | - Bassem Refaat
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Al Abdeyah, Makkah, PO Box 7607, KSA.
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Kriesel JD, Bhatia AS, Barrus C, Vaughn M, Gardner J, Crisp RJ. Multiplex PCR testing for nine different sexually transmitted infections. Int J STD AIDS 2015; 27:1275-1282. [PMID: 26538551 DOI: 10.1177/0956462415615775] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 10/14/2015] [Indexed: 02/04/2023]
Abstract
Current sexually transmitted infection (STI) testing is not optimal due to delays in reporting or missed diagnoses due to a lack of comprehensive testing. The FilmArray® (BioFire Diagnostics, LLC, Salt Lake City, Utah) is a user-friendly, fully automated, multiplex PCR system that is being developed for rapid point-of-care use. A research-use-only STI panel including multiple PCR primer sets for each organism was designed to detect Chlamydia trachomatis, Neisseria gonorrhoeae, Treponema pallidum, Trichomonas vaginalis, Mycoplasma genitalium, Ureaplasma urealyticum, Haemophilus ducreyi, and herpes simplex virus (HSV) types 1 and 2. Standard clinical testing included Gram stain, nucleic acid amplification, wet mount examination, herpes simplex virus culture, and syphilis IgG. Standard clinical tests were not available for all the organisms tested by the FilmArray STI panel. Two hundred and ninety-five clinical specimens from 190 subjects were directly compared to standard testing. Urine (n = 146), urethral/cervical swabs (31), oral swabs (60), rectal swabs (43), and ulcer swabs (15) were tested. Among the tested samples, FilmArray detected C. trachomatis in 39 (13%), N. gonorrhoeae in 20 (7%), T. vaginalis in nine (3%), HSV 1 in five (2%), HSV 2 in five (2%), U. urealyticum in 36 (12%), M. genitalium in eight (3%), and T. pallidum in 11 (4%). Concordance between the FilmArray STI panel and standard nucleic acid amplification testing for C. trachomatis was 98% and for N. gonorrhoeae was 97%. Multiplex PCR STI testing has the potential to improve public health by providing rapid, sensitive, and reliable results within the clinic or nearby laboratory.
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Affiliation(s)
- John D Kriesel
- Division of Infectious Diseases, Department of Internal Medicine, University of Utah, USA
| | - Amiteshwar S Bhatia
- Division of Infectious Diseases, Department of Internal Medicine, University of Utah, USA
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Rumyantseva T, Golparian D, Nilsson CS, Johansson E, Falk M, Fredlund H, Van Dam A, Guschin A, Unemo M. Evaluation of the new AmpliSens multiplex real-time PCR assay for simultaneous detection of Neisseria gonorrhoeae, Chlamydia trachomatis, Mycoplasma genitalium, and Trichomonas vaginalis. APMIS 2015; 123:879-86. [PMID: 26299582 DOI: 10.1111/apm.12430] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 07/08/2015] [Indexed: 11/30/2022]
Abstract
In this study, we performed an evaluation of the new CE-marked multiplex real-time AmpliSens N.gonorrhoeae/C.trachomatis/M.genitalium/T.vaginalis-MULTIPRIME-FRT PCR assay compared to APTIMA tests, i.e., APTIMA COMBO 2 assay, APTIMA Trichomonas vaginalis assay (FDA-approved), and two different APTIMA Mycoplasma genitalium assays (research use only; one of them only used for discrepancy analysis). Vaginal swabs (n = 209) and first-void urine (FVU) specimens from females (n = 498) and males (n = 554), consecutive attendees (n = 1261) at a dermatovenerological clinic in Sweden, were examined. The sensitivity of the AmpliSens PCR assay for detection of C. trachomatis (6.3% prevalence), M. genitalium (5.7% prevalence), N. gonorrhoeae (0.3% prevalence), and T. vaginalis (0.08% prevalence) was 97.5% (95% confidence interval (CI): 91.2-99.6%), 81.9% (95% CI: 70.7-89.7%), 100% (95% CI: 40.2-100%) and 100% (95% CI: 16.5-100%), respectively. The specificity of the AmpliSens PCR assay was 100% (95% CI: 99.6-100%) for all agents. The analytical sensitivity and specificity for N. gonorrhoeae detection was excellent, i.e., 55 international gonococcal strains detected and 135 isolates of 13 non-gonococcal Neisseria species were negative. In conclusion, the multiplex real-time AmpliSens N.gonorrhoeae/C.trachomatis/M.genitalium/T.vaginalis-MULTIPRIME-FRT PCR assay demonstrated high sensitivity and excellent specificity for the detection of C. trachomatis, N. gonorrhoeae, and T. vaginalis, and excellent specificity but suboptimal sensitivity for M. genitalium detection.
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Affiliation(s)
- Tatiana Rumyantseva
- Department of Molecular Diagnostics, Central Research Institute for Epidemiology, Moscow, Russia
| | - Daniel Golparian
- WHO Collaborating Centre for Gonorrhoea and Other STIs, National Reference Laboratory for Pathogenic Neisseria, Department of Laboratory Medicine, Microbiology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Christian S Nilsson
- Department of Dermatovenereology, Örebro University Hospital, Örebro, Sweden
| | - Emma Johansson
- WHO Collaborating Centre for Gonorrhoea and Other STIs, National Reference Laboratory for Pathogenic Neisseria, Department of Laboratory Medicine, Microbiology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - My Falk
- Department of Dermatovenereology, Örebro University Hospital, Örebro, Sweden
| | - Hans Fredlund
- WHO Collaborating Centre for Gonorrhoea and Other STIs, National Reference Laboratory for Pathogenic Neisseria, Department of Laboratory Medicine, Microbiology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Alje Van Dam
- Public Health Laboratory, Amsterdam Health Centre, Amsterdam, the Netherlands.,Department of Medical Microbiology, OLVG, Amsterdam, the Netherlands
| | - Alexander Guschin
- Department of Molecular Diagnostics, Central Research Institute for Epidemiology, Moscow, Russia
| | - Magnus Unemo
- WHO Collaborating Centre for Gonorrhoea and Other STIs, National Reference Laboratory for Pathogenic Neisseria, Department of Laboratory Medicine, Microbiology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
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Choe HS, Lee DS, Lee SJ, Hong SH, Park DC, Lee MK, Kim TH, Cho YH. Performance of Anyplex™ II multiplex real-time PCR for the diagnosis of seven sexually transmitted infections: comparison with currently available methods. Int J Infect Dis 2013; 17:e1134-40. [DOI: 10.1016/j.ijid.2013.07.011] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 06/23/2013] [Accepted: 07/11/2013] [Indexed: 11/16/2022] Open
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Abstract
In recent years, quantitative real-time PCR tests have been extensively developed in clinical microbiology laboratories for routine diagnosis of infectious diseases, particularly bacterial diseases. This molecular tool is well-suited for the rapid detection of bacteria directly in clinical specimens, allowing early, sensitive and specific laboratory confirmation of related diseases. It is particularly suitable for the diagnosis of infections caused by fastidious growth species, and the number of these pathogens has increased recently. This method also allows a rapid assessment of the presence of antibiotic resistance genes or gene mutations. Although this genetic approach is not always predictive of phenotypic resistances, in specific situations it may help to optimize the therapeutic management of patients. Finally, an approach combining the detection of pathogens, their mechanisms of antibiotic resistance, their virulence factors and bacterial load in clinical samples could lead to profound changes in the care of these infected patients.
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Affiliation(s)
- Max Maurin
- Laboratoire de Bactériologie, Département des Agents Infectieux, Institut de Biologie et Pathologie, CHU de Grenoble, Université Joseph Fourier Grenoble 1, France.
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Rapid PCR Detection of Mycoplasma hominis, Ureaplasma urealyticum, and Ureaplasma parvum. INTERNATIONAL JOURNAL OF BACTERIOLOGY 2013; 2013:168742. [PMID: 26904723 PMCID: PMC4745450 DOI: 10.1155/2013/168742] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 01/30/2013] [Indexed: 12/02/2022]
Abstract
Objective. We compared laboratory developed real-time PCR assays for detection of Mycoplasma hominis and for detection and differentiation of Ureaplasma urealyticum and parvum to culture using genitourinary specimens submitted for M. hominis and Ureaplasma culture. Methods. 283 genitourinary specimens received in the clinical bacteriology laboratory for M. hominis and Ureaplasma species culture were evaluated. Nucleic acids were extracted using the Total Nucleic Acid Kit on the MagNA Pure 2.0. 5 μL of the extracts were combined with 15 μL of each of the two master mixes. Assays were performed on the LightCycler 480 II system. Culture was performed using routine methods. Results.
M. hominis PCR detected 38/42 M. hominis culture-positive specimens, as well as 2 that were culture negative (sensitivity, 90.5%; specificity, 99.2%). Ureaplasma PCR detected 139/144 Ureaplasma culture-positive specimens, as well as 9 that were culture negative (sensitivity, 96.5%; specificity, 93.6%). Of the specimens that tested positive for Ureaplasma species, U. urealyticum alone was detected in 33, U. parvum alone in 109, and both in 6. Conclusion. The described PCR assays are rapid alternatives to culture for detection of M. hominis and Ureaplasma species, and, unlike culture, the Ureaplasma assay easily distinguishes U. urealyticum from parvum.
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Evaluation of Seeplex® STD6 ACE Detection kit for the diagnosis of six bacterial sexually transmitted infections. J Infect Chemother 2012; 18:494-500. [PMID: 22252268 DOI: 10.1007/s10156-011-0362-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Accepted: 12/20/2011] [Indexed: 10/14/2022]
Abstract
Traditionally, the diagnosis of bacterial sexually transmitted infection (STI) has been dependent on the isolation of the causative pathogens by culturing endocervical or urethral swab specimens on selective media. While such procedures typically provide excellent diagnostic accuracy, they are often time-consuming and expensive. A multiplex polymerase chain reaction (PCR) assay, based on a semi-automated detection system, was evaluated for the detection of six STI causative organisms. The Seeplex(®) STD6 ACE (auto-capillary electrophoresis) Detection assay employed six pairs of dual priming oligonucleotide (DPO™) primers specifically targeted to unique genes of Chlamydia trachomatis, Neisseria gonorrhoeae, Mycoplasma genitalium, Ureaplasma urealyticum, Mycoplasma hominis, and Trichomonas vaginalis. A total of 739 specimens (304 cervical swabs and 435 urine samples) collected for 4 months were tested, and results were compared to those obtained with a combined monoplex PCR. The concordance between the multiplex PCR and monoplex PCR assay was 100% for both sensitivity and specificity. We also tested for the presence of two pathogenic bacteria (C. trachomatis and N. gonorrhoeae) and compared the results obtained with the multiplex PCR and BD ProbeTec duplex strand displacement amplification (SDA). The results of the multiplex PCR and duplex SDA were 99.7% concordant for C. trachomatis and 100% concordant for N. gonorrhoeae. The multiplex PCR assay using the Seeplex(®) STD6 ACE Detection kit proved to be a novel cost-effective and fast diagnostic tool with high sensitivity and specificity for the simultaneous detection of six STI pathogens.
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