1
|
Rumianek B, Hillman R, Jeoffreys N, Ghazanfar S, Schifter M, Ajwani S. Prevalence of oral HPV in the adult sample population in Sydney. Aust Dent J 2023; 68:19-25. [PMID: 36281543 DOI: 10.1111/adj.12943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/08/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Oropharyngeal squamous cell carcinomas are increasing in incidence. Risk factors include sexual behaviour, high-risk oral HPV infection and poor oral hygiene. We aimed to provide initial information on the prevalence and assess the feasibility of testing in dental settings. METHODS Patients ≥18 years old attending dental clinics in Sydney, Australia, were recruited, oral hygiene assessed, and 10 mL saline oral rinses obtained. Rinses were tested for HBG and HPV by PCR. Participants completed demographic and behavioural questionnaires. RESULTS The mean age was 48 years, of whom 131 (43.6%) were male. HPV genotypes, one each of 16, 66, 51, 35 and 58 in five participants, and 18 and 52 in one participant, were detected in six samples (2.0%), all men. Oral sex was reported by 89 (67.9%) male participants. One participant (4.3%) of the 23 with poor OH had at least one HPV genotype detected. DISCUSSION With dental patients willing to provide rinse samples and disclose potentially sensitive information, we found the hrHPV prevalence of 2%. Given large proportions of the general population attending dental clinics regularly, dentists may be ideally placed to screen for oropharyngeal carcinoma and contribute to the currently limited knowledge of oral HPV prevalence in Australian adults. © 2022 Australian Dental Association.
Collapse
Affiliation(s)
- B Rumianek
- The University of Sydney, Camperdown, Australia
| | - R Hillman
- University of New South Wales, Sydney, Australia
| | - N Jeoffreys
- Westmead Institute for Medical Research, Westmead, Australia
| | - S Ghazanfar
- The University of Sydney, Camperdown, Australia
| | - M Schifter
- The University of Sydney, Camperdown, Australia
| | - S Ajwani
- The University of Sydney, Camperdown, Australia
| |
Collapse
|
2
|
Maamary J, Maddocks S, Barnett Y, Wong S, Rodriguez M, Hueston L, Jeoffreys N, Eden JS, Dwyer DE, Floyd T, Plit M, Kok J, Brew B. New Detection of Locally Acquired Japanese Encephalitis Virus Using Clinical Metagenomics, New South Wales, Australia. Emerg Infect Dis 2023; 29:627-630. [PMID: 36823673 PMCID: PMC9973708 DOI: 10.3201/eid2903.220632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
Abstract
In the context of an emerging Japanese encephalitis outbreak within Australia, we describe a novel locally acquired case in New South Wales. A man in his 70s had rapidly progressive, fatal meningoencephalitis, diagnosed as caused by Japanese encephalitis virus by RNA-based metagenomic next-generation sequencing performed on postmortem brain tissue.
Collapse
|
3
|
Pham D, Howard-Jones AR, Hueston L, Jeoffreys N, Doggett S, Rockett R, Eden JS, Sintchenko V, Chen SCA, O’Sullivan MV, Maddocks S, Dwyer DE, Kok J. Emergence of Japanese encephalitis in Australia: a diagnostic perspective. Pathology 2022; 54:669-677. [DOI: 10.1016/j.pathol.2022.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 07/05/2022] [Accepted: 07/18/2022] [Indexed: 11/16/2022]
|
4
|
Badahdah AM, Bakarman MA, Khatami A, Tashani M, Barasheed O, Alfelali M, Azeem MI, Bokhary H, Soltan O, Lahra MM, Jeoffreys N, Kok J, Dwyer DE, Booy R, Rashid H. Meningococcal and pneumococcal carriage in Hajj pilgrims: findings of a randomized controlled trial. J Travel Med 2020; 27:5775502. [PMID: 32125434 DOI: 10.1093/jtm/taaa032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/12/2020] [Accepted: 02/26/2020] [Indexed: 11/13/2022]
Abstract
BACKGROUND Intense congestion during the Hajj pilgrimage amplifies the risk of meningococcal carriage and disease, and there have been many meningococcal outbreaks reported amongst pilgrims. Thus, a strict vaccination policy is enforced by the host country and either polysaccharide or conjugate quadrivalent meningococcal vaccines are mandatory. However, unlike conjugate vaccines, the polysaccharide vaccine is not thought to reduce pharyngeal carriage of meningococci. METHODS A single-blinded, randomized, controlled trial amongst pilgrims from Saudi Arabia and Australia during the Hajj seasons of 2016-2017 was conducted to compare MenACWY-Conjugate vaccine with MenACWY-Polysaccharide vaccine, to determine if the conjugate vaccine is more effective in reducing asymptomatic carriage of meningococci, and whether the effect may be long-standing. Oropharyngeal swabs were obtained pre-, immediately post- and 6-11 months following completion of Hajj and tested for the presence of meningococci. RESULTS Amongst 2000 individuals approached, only 1146 participants aged 18-91 (mean 37.6) years agreed to participate and were randomized to receive either the polysaccharide (n = 561) or the conjugate (n = 561) vaccine, 60.8% were male, and 93.5% were from Saudi Arabia. Amongst oropharyngeal swabs obtained before Hajj, only two (0.2%) tested positive for Neisseria meningitidis. Similarly, meningococci were identified in only one sample at each of the post-Hajj and late follow-up visits. None of the carriage isolates were amongst the serogroups covered by the vaccines. A post hoc analysis of the third swabs revealed that 22.4% of all participants (50/223) were positive for Streptococcus pneumoniae nucleic acid. CONCLUSION The low overall carriage rate of meningococci found amongst Hajj pilgrims in 2016 and 2017 demonstrates a successful vaccination policy, but neither supports nor refutes the superiority of meningococcal conjugate ACWY vaccine over the polysaccharide vaccine against carriage. Although an association could not be established in this study, molecular epidemiology would help to establish the role of Hajj in facilitating transmission of pneumococci and inform vaccination policy.
Collapse
Affiliation(s)
- Al-Mamoon Badahdah
- Department of Family and Community Medicine, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah 22252, Saudi Arabia.,National Centre for Immunisation Research and Surveillance (NCIRS), The Children's Hospital at Westmead, NSW 2145, Australia.,The Discipline of Child and Adolescent Health, The Children's Hospital Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Marwan A Bakarman
- Department of Family and Community Medicine, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah 22252, Saudi Arabia
| | - Ameneh Khatami
- The Discipline of Child and Adolescent Health, The Children's Hospital Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia.,Department of Infectious Diseases and Microbiology, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia
| | - Mohamed Tashani
- The Discipline of Child and Adolescent Health, The Children's Hospital Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia.,Faculty of Medicine, University of Tripoli, Ain Zara, Tripoli, Libya
| | - Osamah Barasheed
- The Executive Administration of Research and Innovation, King Abdullah Medical City in Holy Capital (KAMC-HC), Makkah 24246, Saudi Arabia
| | - Mohammad Alfelali
- Department of Family and Community Medicine, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah 22252, Saudi Arabia.,National Centre for Immunisation Research and Surveillance (NCIRS), The Children's Hospital at Westmead, NSW 2145, Australia.,The Discipline of Child and Adolescent Health, The Children's Hospital Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Mohammad I Azeem
- National Centre for Immunisation Research and Surveillance (NCIRS), The Children's Hospital at Westmead, NSW 2145, Australia
| | - Hamid Bokhary
- Umm Al-Qura University, Makkah, Saudi Arabia.,Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, University of Sydney, Westmead, NSW 2145, Australia
| | - Osama Soltan
- Microbiology department, Al Borg Medical Laboratories, Jeddah 21573, Saudi Arabia
| | - Monica M Lahra
- The World Health Organisation Collaborating Centre for STI and AMR, and Neisseria Reference Laboratory, New South Wales Health Pathology, Microbiology, Prince of Wales Hospital, Randwick, NSW, 2031, Australia.,Faculty of Medicine, The University of New South Wales, Randwick, NSW 2052, Australia
| | - Neisha Jeoffreys
- New South Wales Health Pathology, Institute of Clinical Pathology and Medical Research, Westmead Hospital and University of Sydney, Westmead NSW 2145, Australia
| | - Jen Kok
- New South Wales Health Pathology, Institute of Clinical Pathology and Medical Research, Westmead Hospital and University of Sydney, Westmead NSW 2145, Australia
| | - Dominic E Dwyer
- New South Wales Health Pathology, Institute of Clinical Pathology and Medical Research, Westmead Hospital and University of Sydney, Westmead NSW 2145, Australia
| | - Robert Booy
- National Centre for Immunisation Research and Surveillance (NCIRS), The Children's Hospital at Westmead, NSW 2145, Australia.,The Discipline of Child and Adolescent Health, The Children's Hospital Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia.,Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, University of Sydney, Westmead, NSW 2145, Australia
| | - Harunor Rashid
- National Centre for Immunisation Research and Surveillance (NCIRS), The Children's Hospital at Westmead, NSW 2145, Australia.,The Discipline of Child and Adolescent Health, The Children's Hospital Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia.,Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, University of Sydney, Westmead, NSW 2145, Australia
| | | |
Collapse
|
5
|
Bradley I, Varma R, Knight V, Iliakis D, McNally L, Jalocon D, Jeoffreys N, Chen S, McNulty A. Prevalence of rectal Mycoplasma genitalium and macrolide resistance in men who have sex with men attending Sydney Sexual Health Centre. Sex Health 2020; 17:114-120. [PMID: 31969248 DOI: 10.1071/sh18221] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 07/10/2019] [Indexed: 01/19/2023]
Abstract
Background Sexually transmissible infections (STIs) have been increasing in men who have sex with men (MSM) in recent years; however, few studies have investigated the prevalence or antimicrobial resistance in rectal Mycoplasma genitalium in this group. This study aimed to determine the prevalence and predictors of rectal M. genitalium in MSM attending an urban sexual health service in Sydney, Australia, namely the Sydney Sexual Health Centre (SSHC), as well as estimate the rate of macrolide resistance. METHODS A prospective cross-sectional analysis was conducted of rectally asymptomatic MSM having a rectal swab collected as part of their routine care. Participants self-collected a rectal swab to be tested for M. genitalium and completed a 14-item questionnaire that provided information on behavioural risk factors. The prevalence of rectal M. genitalium was determined and multivariate analysis was performed to assess the associations for this infection. Positive specimens then underwent testing for macrolide-resistant mutations (MRMs) using the ResistancePlus MG assay (SpeeDx, Eveleigh, NSW, Australia). RESULTS In all, 742 patients were consecutively enrolled in the study. The median age was 31 years (interquartile range 27-39 years), with 43.0% born in Australia. Overall, 19.0% of men were bisexual, 22.9% were taking pre-exposure prophylaxis (PrEP) and 4.3% were HIV positive. The prevalence of rectal M. genitalium was 7.0% (95% confidence interval (CI) 5.3-9.1) overall and 11.8% in those taking PrEP. On multivariate analysis, PrEP use was significantly associated with having rectal M. genitalium (odds ratio 2.01; 95% CI 1.09-3.73; P = 0.01). MRMs were detected in 75.0% (36/48; 95% CI 60.4-86.4%) of infections. CONCLUSION Rates of rectal M. genitalium infection were high among asymptomatic MSM attending SSHC and MRMs were detected in 75% of infections. PrEP use was found to be significantly associated with rectal M. genitalium infection. These data contribute to the evidence base for screening guidelines in MSM.
Collapse
Affiliation(s)
- Isabella Bradley
- Faculty of Medicine, University of New South Wales, Kensington, NSW 2052, Australia
| | - Rick Varma
- Sydney Sexual Health Centre, Sydney, NSW 2000, Australia
| | - Vickie Knight
- Sydney Sexual Health Centre, Sydney, NSW 2000, Australia
| | - Dimitra Iliakis
- Serology and Virology Division, NSW Health Pathology, Prince of Wales Hospital, Randwick, NSW 2031, Australia
| | - Leon McNally
- Molecular Diagnostic Medicine Laboratory, SydPath St Vincent's Hospital, Darlinghurst, NSW 2010, Australia
| | - Dean Jalocon
- Centre for Infectious Diseases and Microbiology Laboratory Services, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Neisha Jeoffreys
- Institute for Clinical Pathology and Medical Research, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Sharon Chen
- Institute for Clinical Pathology and Medical Research, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Anna McNulty
- Sydney Sexual Health Centre, Sydney, NSW 2000, Australia; and Corresponding author.
| |
Collapse
|
6
|
Trang VD, Rockett R, Jeoffreys N, Trung NV, Hai An HP, Kok J, Dwyer DE. BK polyomavirus: a review of the virology, pathogenesis, clinical and laboratory features, and treatment. Future Virol 2017. [DOI: 10.2217/fvl-2017-0013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BK polyomavirus (BKPyV) is a non-enveloped, circular dsDNA virus with a genome of approximately 5100 base pairs. It can be divided into four major genotypes, but the effects of different genotypes on clinical disease are uncertain. Primary BKPyV infection is generally acquired asymptomatically in childhood. It establishes low-level persistence in many tissues, particularly the genitourinary tract. Reactivation can lead to severe disease including BKPyV-associated nephropathy confirmed by renal biopsy, hemorrhagic cystitis and meningoencephalitis. Nucleic acid amplification testing of blood and urine is the main diagnostic and prognostic test for BKPyV infection. The treatment of BKPyV infection has concentrated on reduction in immunosuppressive therapy. Recent studies suggest that antiviral drugs have demonstrated only modest benefit, but adoptive T-cell therapies offer potential advances.
Collapse
Affiliation(s)
- Van Dinh Trang
- Clinical Laboratory, National Hospital of Tropical Diseases, 78-Giai Phong, Dong Da, Hanoi, Vietnam
- Western Clinical School, Westmead Hospital, The University of Sydney, NSW 2006, Australia
| | - Rebecca Rockett
- Center for Infectious Diseases & Microbiology Laboratory Services, Institute of Clinical Pathology & Medical Research, NSW Health Pathology, Westmead Hospital, Westmead NSW 2145, Australia
| | - Neisha Jeoffreys
- Center for Infectious Diseases & Microbiology Laboratory Services, Institute of Clinical Pathology & Medical Research, NSW Health Pathology, Westmead Hospital, Westmead NSW 2145, Australia
| | - Nguyen Vu Trung
- Clinical Laboratory, National Hospital of Tropical Diseases, 78-Giai Phong, Dong Da, Hanoi, Vietnam
- Department of Medical Microbiology, Hanoi Medical University, No. 1 Ton That Tung St, Dong Da, Hanoi, Vietnam
| | - Ha Phan Hai An
- Department of International Cooperation, Hanoi Medical University, No. 1 Ton That Tung St, Dong Da, Hanoi, Vietnam
- Kidney Diseases & Dialysis Department, Viet Duc Hospital, No. 40 Trang Thi St, Hoan Kiem, Hanoi, Vietnam
| | - Jen Kok
- Center for Infectious Diseases & Microbiology Laboratory Services, Institute of Clinical Pathology & Medical Research, NSW Health Pathology, Westmead Hospital, Westmead NSW 2145, Australia
| | - Dominic E Dwyer
- Western Clinical School, Westmead Hospital, The University of Sydney, NSW 2006, Australia
- Center for Infectious Diseases & Microbiology Laboratory Services, Institute of Clinical Pathology & Medical Research, NSW Health Pathology, Westmead Hospital, Westmead NSW 2145, Australia
| |
Collapse
|
7
|
Azeem MI, Tashani M, Badahdah AM, Heron L, Pedersen K, Jeoffreys N, Kok J, Haworth E, Dwyer DE, Hill-Cawthorne G, Rashid H, Booy R. Surveillance of Australian Hajj pilgrims for carriage of potentially pathogenic bacteria: Data from two pilot studies. World J Clin Cases 2017; 5:102-111. [PMID: 28352634 PMCID: PMC5352958 DOI: 10.12998/wjcc.v5.i3.102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 12/14/2016] [Accepted: 01/03/2017] [Indexed: 02/05/2023] Open
Abstract
AIM To estimate the pharyngeal carriage rate of Neisseria meningitidis (N. meningitidis), Streptococcus pneumoniae (S. pneumoniae) and Staphylococcus aureus (S. aureus) among Australian Hajj pilgrims.
METHODS In 2014, surveillance was conducted in two phases among Australian Hajj pilgrims: The first phase during Hajj in Mina, and the second phase soon after returning home to Australia. Nasopharyngeal or oropharyngeal swabs were taken from participants then tested, firstly by nucleic acid testing, and also by standard culture.
RESULTS Of 183 participants recruited in the first phase, 26 (14.2%) tested positive for S. pneumoniae; 4 had received pneumococcal conjugate vaccine (PCV13). Only one tested positive for N. meningitidis (W). Of 93 2nd phase samples cultured, 17 (18.3%) grew S. aureus, all methicillin sensitive, 2 (2.2%) grew N. meningitidis (on subculture; one serotype B, one negative), and 1 (1%), from an unvaccinated pilgrim, grew S. pneumoniae.
CONCLUSION Relatively high carriage of S. pneumoniae and little meningococcal carriage was found. This indicates the importance of a larger study for improved infection surveillance and possible vaccine evaluation.
Collapse
|
8
|
Read P, Tagg K, Jeoffreys N, Gilbert G, Guy R, Donovan B. 005.5 Treponema pallidumstrain-types in australia and association with macrolide resistance. Br J Vener Dis 2015. [DOI: 10.1136/sextrans-2015-052270.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
9
|
Read PJ, Guy R, Jeoffreys N, Baker D, Shields M, Donovan B. Treatment and outcomes of polymerase chain reaction-confirmed early syphilis. Sex Health 2015; 12:506-11. [PMID: 26255040 DOI: 10.1071/sh15043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 07/06/2015] [Indexed: 11/23/2022]
Abstract
UNLABELLED Background Syphilis is resurgent among gay and bisexual men (GBM) despite effective treatment and widely available diagnostic serology. The polymerase chain reaction assay for Treponema pallidum (TP-PCR) is available, but little is known about the clinical features and outcomes for patients testing positive by TP-PCR. METHODS Clinical data were collected from four medical practices for patients recording a positive TP-PCR result between 2004 and 2011. Demographic, serological, treatment and reinfection details were obtained. Results were stratified by HIV status and whether treatment conformed to international guidelines. RESULTS 220 patients were positive for TP-PCR, of whom 92% were GBM. Seventeen (8.1%) were positive by TP-PCR before seroconversion. Almost one-third (32.1%) received treatment beyond that recommended in guidelines, and this was associated with HIV status (40.3% HIV positive vs 22.4% HIV negative, P<0.01). All but one patient with adequate follow up achieved serological cure. There was no significant difference in time to serological cure between the groups receiving standard therapy or enhanced therapy (95 vs 108 days; P=0.67) or between HIV positive and negative patients (93 vs 104 days, P=0.06). Nineteen patients were reinfected during follow up. CONCLUSION TP-PCR aids early diagnosis of syphilis and may be reactive before conventional serological tests. Treatment outcomes for TP-PCR-positive early infection were excellent, but a significant proportion of patients received non-standard therapy. Expanded use of syphilis PCR testing in at-risk populations is recommended since early identification and treatment is likely to be important in controlling the current epidemic in GBM.
Collapse
Affiliation(s)
- Phillip J Read
- Kirketon Road Centre, PO Box 22, Kings Cross, NSW 1340, Australia
| | - Rebecca Guy
- Sexual Health Program, The Kirby Institute, UNSW Australia, Sydney, NSW 2052, Australia
| | - Neisha Jeoffreys
- Centre for Microbiology and Infectious Diseases - Public Health, Institute for Clinical Pathology and Medical Research, Pathology West, NSW 2145, Australia
| | - David Baker
- East Sydney Doctors, 102 Burton Street, Darlinghurst, NSW 2010, Australia
| | - Matthew Shields
- Taylor Square Private Clinic, 393 Bourke Street, Darlinghurst, NSW 2010, Australia
| | - Basil Donovan
- Sexual Health Program, The Kirby Institute, UNSW Australia, Sydney, NSW 2052, Australia
| |
Collapse
|
10
|
Myint TMM, Turner RM, Craig JC, Cross NB, Kable K, Nankivell BJ, Chapman JR, Webster AC, O'Connell P, Dwyer DE, Jeoffreys N, Roger SD, Wong G. Test performance characteristics of quantitative nucleic acid testing for polyomaviruses in kidney and kidney-pancreas transplant recipients. Clin Transplant 2013; 27:E571-9. [PMID: 23952788 DOI: 10.1111/ctr.12195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/19/2013] [Indexed: 12/16/2022]
Abstract
Screening for polyoma BK virus (BK) using nucleic testing (NAT) is recommended for kidney and kidney-pancreas transplant recipients, but the performance characteristics of quantitative BK NAT at different thresholds of plasma BK viral loads are unclear. We aim to evaluate the diagnostic accuracy of quantitative BK NAT as an add-on test to qualitative polyoma NAT for the diagnosis of BK virus-associated nephropathy (BKVAN) in kidney and kidney transplant recipients. We calculated the test sensitivity, specificity, and predictive values at the different thresholds of plasma BK viral load for BKVAN. At the recommended threshold of >1 × 10(3) serum BK copies/mL serum for test positivity, the sensitivity for BKVAN was 92.9% (95% confidence intervals [CI]: 66.1-99.8) and specificity 79.1% (95%: CI 67.4-88.1), with corresponding positive and negative predictive values of 42.0% (95% CI: 24.8-57.7%) and 98.6% (95% CI: 98.3-99.9%), respectively. The overall area under curve for the quantitative BK NAT was 0.92 (95% CI: 0.85-0.97). Quantitative BK NAT displays properties of high sensitivity and specificity that are fit for purpose as an add-on test to qualitative polyomavirus NAT for kidney and kidney-pancreas transplant recipients at risk of BKVAN.
Collapse
Affiliation(s)
- T M M Myint
- Department of Renal Medicine and Transplantation, Westmead Hospital, Westmead, NSW, Australia
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Hueston L, Toi CS, Jeoffreys N, Sorrell T, Gilbert G. Diagnosis of Barmah Forest virus infection by a nested real-time SYBR green RT-PCR assay. PLoS One 2013; 8:e65197. [PMID: 23935816 PMCID: PMC3720699 DOI: 10.1371/journal.pone.0065197] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 04/27/2013] [Indexed: 11/19/2022] Open
Abstract
Barmah Forest virus (BFV) is a mosquito borne (+) ssRNA alphavirus found only in Australia. It causes rash, myalgia and arthralgia in humans and is usually diagnosed serologically. We developed a real-time PCR assay to detect BFV in an effort to improve diagnosis early in the course of infection. The limit of detection was 16 genome equivalents with a specificity of 100%. Fifty five serum samples from BFV-infected patients were tested by the PCR. 52 of 53 antibody-positive samples were PCR negative. Two culture-positive (neutralizing antibody negative) samples were positive on first round PCR, while one sample (IgM and neutralizing antibody strongly positive, IgG negative) was positive on second round PCR, suggesting that viral RNA is detectable and transiently present in early infection. PCR can provide results faster than culture, is capable of high throughput and by sequencing the PCR product strain variants can be characterized.
Collapse
Affiliation(s)
- Linda Hueston
- Centre for Infectious Diseases and Microbiology Laboratory Services, Westmead, NSW, Australia.
| | | | | | | | | |
Collapse
|
12
|
Sultana Y, Jeoffreys N, Watts MR, Gilbert GL, Lee R. Real-time polymerase chain reaction for detection of Strongyloides stercoralis in stool. Am J Trop Med Hyg 2013; 88:1048-51. [PMID: 23568289 DOI: 10.4269/ajtmh.12-0437] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The use of real-time polymerase chain reaction (PCR) for detection of Strongyloides stercoralis in stool has recently been described. We compared five DNA extraction methods by using normal human stool spiked with Strongyloides ratti and tested by using a real-time PCR. The PowerSoil kit was found to be the best technique in terms of sensitivity and ease of use. The PCR detected DNA extracted from one spiked S. ratti larva diluted 10⁻². The PowerSoil kit was then used to extract DNA from 160 human survey samples. All culture positive specimens with a high and moderate larval load were identified by real-time PCR, but only 15% of specimens with low larval load were positive. Specificity was greater than 99%. The combination of the PowerSoil kit and real-time PCR reliably detected high to moderate larval numbers of S. stercoralis in stools but was less sensitive when the larval load was low.
Collapse
Affiliation(s)
- Yasmin Sultana
- Centre for Infectious Diseases and Microbiology Laboratory Services, Institute of Clinical Pathology and Medical Research, Westmead Hospital, Westmead, New South Wales, Australia.
| | | | | | | | | |
Collapse
|
13
|
Cross NB, Webster AC, O'Connell PJ, Jeoffreys N, Dwyer DE, Craig JC. Diagnostic accuracy of blood qualitative nucleic acid testing for polyomavirus-associated nephropathy in kidney recipients. Nephrology (Carlton) 2009; 14:350-6. [PMID: 19444968 DOI: 10.1111/j.1440-1797.2009.01118.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM Polyomavirus-associated nephropathy (PVAN) is an important cause of graft loss following kidney transplantation and may only be diagnosed with kidney transplant biopsy. Early detection may improve outcomes by enabling early intervention. Serum polyomavirus polymerase chain reaction (PVPCR) has been used to identify patients at risk of PVAN, but prior studies have not assessed all patients with negative PVPCR with transplant biopsy, potentially overestimating test performance. METHODS We assessed the diagnostic accuracy of qualitative PVPCR for detection of PVAN in a population undergoing protocol biopsies. We included all patients receiving kidney or kidney-pancreas transplants and followed at Westmead Hospital, Sydney, Australia, between May 2002 and March 2007, excluding those with graft loss prior to 1 month post transplant or without PVPCR testing in the first 12 months. We compared PVPCR to contemporaneous transplant biopsies assessed with light microscopy and immunohistochemistry. RESULTS Of the 257 included patients, 246 (96%) underwent biopsy within 30 days of PVPCR. Eight of 36 patients with positive PVPCR had PVAN and one of 210 patients with negative PVPCR had PVAN. The point prevalence of PVAN was therefore 3.7%, with PVPCR sensitivity 89% (95% CI 57% to 99%) and specificity 88%(95% CI 83% to 92%). The negative predictive value is 99.5% (95% CI 97.3% to 100.0%). CONCLUSION Qualitative PVPCR on serum is a reliable triage test for excluding the presence of PVAN. Screening for PVAN need not include biopsy in patients with negative PVPCR.
Collapse
Affiliation(s)
- Nicholas B Cross
- Centre for Kidney Research, Children's Hospital at Westmead, Westmead, NSW 2145, Australia.
| | | | | | | | | | | |
Collapse
|
14
|
Lowe PC, Couldwell DL, Jeoffreys N. 48. TREPONEMA PALLIDUM PCR: APPLICATION AND DIAGNOSTIC VALUE IN 2 CASES OF PRIMARY SYPHILIS. Sex Health 2007. [DOI: 10.1071/shv4n4ab48] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Epidemics of infectious syphilis have been ongoing in large cities in industrialised countries since the turn of the millennium. These epidemics have almost exclusively involved homosexually active men, with a disproportionately high rate among HIV infected individuals. Genital ulcerative disease, including syphilis, has a strong correlation with onward transmission of viral and bacterial sexually transmitted infections.
Due to the lack of a culture system for Treponema pallidum, the causative organism of syphilis, other direct test methods are needed in the evaluation of skin lesions possibly due to syphilis. Dark ground microscopy was once commonly used by sexual health clinicians, but skills in this method have waned in recent years. Polymerase chain reaction (PCR) assays are being increasingly used in the diagnosis of infectious syphilis.
We describe the use of a nucleic acid amplification assay for Treponema pallidum, which targets the 47 kilodalton gene, in the diagnosis of primary syphilis in 2 patients with genital lesions. The first patient was an HIV infected man who presented with an ulcer typical of a chancre but who denied any recent risk behaviour. The second was an HIV negative homosexually active man with an atypical genital lesion. In both cases, Treponema pallidum PCR was positive and serology was consistent with the diagnosis of primary syphilis.
Conclusion/Recommendation: Appropriately validated Treponema pallidum nucleic acid amplification assays could replace dark ground microscopy and direct fluorescent antigen tests as a direct test for early infectious syphilis. It could be particularly useful in individuals who have treponemal skin lesions of atypical appearance.
Collapse
|
15
|
Mackay IM, Harnett G, Jeoffreys N, Bastian I, Sriprakash KS, Siebert D, Sloots TP. Detection and discrimination of herpes simplex viruses, Haemophilus ducreyi, Treponema pallidum, and Calymmatobacterium (Klebsiella) granulomatis from genital ulcers. Clin Infect Dis 2006; 42:1431-8. [PMID: 16619156 DOI: 10.1086/503424] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2005] [Accepted: 01/17/2006] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Genital ulcer disease (GUD) is commonly caused by pathogens for which suitable therapies exist, but clinical and laboratory diagnoses may be problematic. This collaborative project was undertaken to address the need for a rapid, economical, and sensitive approach to the detection and diagnosis of GUD using noninvasive techniques to sample genital ulcers. METHODS The genital ulcer disease multiplex polymerase chain reaction (GUMP) was developed as an inhouse nucleic acid amplification technique targeting serious causes of GUD, namely, herpes simplex viruses (HSVs), H. ducreyi, Treponema pallidum, and Klebsiella species. In addition, the GUMP assay included an endogenous internal control. Amplification products from GUMP were detected by enzyme linked amplicon hybridization assay (ELAHA). RESULTS GUMP-ELAHA was sensitive and specific in detecting a target microbe in 34.3% of specimens, including 1 detection of HSV-1, three detections of HSV-2, and 18 detections of T. pallidum. No H. ducreyi has been detected in Australia since 1998, and none was detected here. No Calymmatobacterium (Klebsiella) granulomatis was detected in the study, but there were 3 detections during ongoing diagnostic use of GUMP-ELAHA in 2004 and 2005. The presence of C. granulomatis was confirmed by restriction enzyme digestion and nucleotide sequencing of the 16S rRNA gene for phylogenetic analysis. CONCLUSIONS GUMP-ELAHA permitted comprehensive detection of common and rare causes of GUD and incorporated noninvasive sampling techniques. Data obtained by using GUMP-ELAHA will aid specific treatment of GUD and better define the prevalence of each microbe among at-risk populations with a view to the eradication of chancroid and donovanosis in Australia.
Collapse
Affiliation(s)
- Ian M Mackay
- Queensland Paediatric Infectious Diseases Laboratory, Sir Albert Sakzewski Virus Research Centre, Royal Children's Hospital, Queensland, Australia.
| | | | | | | | | | | | | |
Collapse
|