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3.
Emerg Infect Dis ; 29(4): 848-850, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-36918374

RESUMO

We retrospectively screened oropharyngeal and rectal swab samples originally collected in California, USA, for Chlamydia trachomatis and Neisseria gonorrhoeae testing for the presence of monkeypox virus DNA. Among 206 patients screened, 17 (8%) had samples with detectable viral DNA. Monkeypox virus testing from mucosal sites should be considered for at-risk patients.


Assuntos
Infecções por Chlamydia , Gonorreia , Humanos , California/epidemiologia , Infecções por Chlamydia/diagnóstico , Infecções por Chlamydia/epidemiologia , Chlamydia trachomatis/genética , Chlamydia trachomatis/isolamento & purificação , DNA , Gonorreia/diagnóstico , Vírus da Varíola dos Macacos/genética , Vírus da Varíola dos Macacos/isolamento & purificação , Neisseria gonorrhoeae/genética , Neisseria gonorrhoeae/isolamento & purificação , Estudos Retrospectivos , /diagnóstico
4.
BMC Pregnancy Childbirth ; 22(1): 194, 2022 Mar 09.
Artigo em Inglês | MEDLINE | ID: mdl-35264142

RESUMO

BACKGROUND: Sexually transmitted infections (STIs) during pregnancy may increase the risk of adverse pregnancy outcomes. STI syndromic management is standard of care in South Africa but has its limitations. We evaluated the impact of diagnosing and treating curable STIs during pregnancy on adverse pregnancy and birth outcomes. METHODS: We combined data from two prospective studies of pregnant women attending public sector antenatal care (ANC) clinics in Tshwane District and Cape Town, South Africa. Pregnant women were enrolled, tested and treated for STIs. We evaluated the association between any STI at the first ANC visit and a composite adverse pregnancy outcome (miscarriage, stillbirth, preterm birth, early neonatal death, or low birthweight) using modified Poisson regression models, stratifying by HIV infection and adjusting for maternal characteristics. RESULTS: Among 619 women, 61% (n = 380) were from Tshwane District and 39% (n = 239) from Cape Town; 79% (n = 486) were women living with HIV. The prevalence of any STI was 37% (n = 228); C. trachomatis, 26% (n = 158), T. vaginalis, 18% (n = 120) and N. gonorrhoeae, 6% (n = 40). There were 93% (n = 574) singleton live births, 5% (n = 29) miscarriages and 2% (n = 16) stillbirths. Among the live births, there were 1% (n = 3) neonatal deaths, 7% (n = 35) low birthweight in full-term babies and 10% (n = 62) preterm delivery. There were 24% (n = 146) for the composite adverse pregnancy outcome. Overall, any STI diagnosis and treatment at first ANC visit was not associated with adverse outcomes in women living with HIV (adjusted relative risk (aRR); 1.43, 95% CI: 0.95-2.16) or women without HIV (aRR; 2.11, 95% CI: 0.89-5.01). However, C. trachomatis (aRR; 1.57, 95% CI: 1.04-2.39) and N. gonorrhoeae (aRR; 1.69, 95% CI: 1.09-3.08), were each independently associated with the composite adverse outcome in women living with HIV. CONCLUSION: Treated STIs at the first ANC visit were not associated with adverse pregnancy outcome overall. In women living with HIV, C. trachomatis or N. gonorrhoeae at first ANC were each independently associated with adverse pregnancy outcome. Our results highlights complex interactions between the timing of STI detection and treatment, HIV infection and pregnancy outcomes, which warrants further investigation.


Assuntos
Infecções por HIV/complicações , Programas de Rastreamento/métodos , Complicações Infecciosas na Gravidez/diagnóstico , Resultado da Gravidez/epidemiologia , Infecções Sexualmente Transmissíveis/diagnóstico , Adulto , Chlamydia trachomatis/isolamento & purificação , Centros Comunitários de Saúde , Feminino , Humanos , Neisseria gonorrhoeae/isolamento & purificação , Gravidez , Cuidado Pré-Natal , Prevalência , Estudos Prospectivos , África do Sul/epidemiologia , Manejo de Espécimes/instrumentação , Trichomonas vaginalis/isolamento & purificação
5.
PLoS One ; 17(2): e0263531, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35213551

RESUMO

BACKGROUND: Gonorrhea caused by Neisseria gonorrhoeae is the second most prevalent curable sexually transmitted infection worldwide. Female Sex Workers (FSWs) are at a higher risk of contracting gonorrhea due to their risky sexual behaviors like inconsistent condom use and multiple sexual partners. We determined the prevalence and risk factors associated with gonorrhea and its antimicrobial susceptibility pattern among symptomatic FSWs attending Sexual Workers Outreach Program (SWOP) city clinic in Nairobi, Kenya. METHODS: Using convenience sampling, we recruited 379 female sex workers from SWOP City clinic in Nairobi County. We administered a semi-structured questionnaire to collect data on socio-demographics and behavioral risk factors associated with gonorrhea. We also conducted three focus groups. Two endocervical swabs were collected from each participant by the attending physician for the laboratory identification of Neisseria gonorrhoeae. An antimicrobial susceptibility test was performed using the disc diffusion method. RESULTS: Twenty-four out of 379 (6.3%) participants tested positive for gonorrhea by PCR. The significant risk factors associated with gonorrhea were having multiple sexual partners in the previous two weeks, primary education, and being in the age group of 38-49 years (p < 0.05). From the qualitative data, sex work disclosure, and difficulty in engaging protected sex with their partner, and unprotected sex with their clients due to more money from the client, PREP, and alcohol use made the female sex workers vulnerable to gonorrhea exposure and or risky sexual behavior. The culture-positive sample result yielded complete (100%) resistance to all the antimicrobials used. CONCLUSION: Neisseria gonorrhoeae infection is prevalent among symptomatic FSWs in Nairobi. Multiple sexual partners, being in age group 38-49 years and having primary education were the factors associated with gonorrhea among the study participants. Based on our identification of a highly resistant isolate, we strongly recommend increasing capacity for culture-based diagnosis and susceptibility testing.


Assuntos
Gonorreia/diagnóstico , Neisseria gonorrhoeae/isolamento & purificação , Profissionais do Sexo , Infecções Sexualmente Transmissíveis/diagnóstico , Adulto , Preservativos , Feminino , Gonorreia/epidemiologia , Gonorreia/microbiologia , Gonorreia/patologia , Humanos , Quênia/epidemiologia , Pessoa de Meia-Idade , Neisseria gonorrhoeae/patogenicidade , Fatores de Risco , Comportamento Sexual , Parceiros Sexuais , Infecções Sexualmente Transmissíveis/epidemiologia , Infecções Sexualmente Transmissíveis/microbiologia , Infecções Sexualmente Transmissíveis/patologia , Inquéritos e Questionários , Sexo sem Proteção
6.
Emerg Microbes Infect ; 11(1): 344-350, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34994305

RESUMO

Background: After Neisseria gonorrhoeae FC428 was first found in Japan, ceftriaxone-resistant strains disseminated globally, and the gonococcal resistance rate increased remarkably. Epidemiological investigations are greatly significant for the analysis of antimicrobial resistance (AMR) trends, molecular features and evolution. Objectives: To clarify the AMR trend from 2016-2019 and reveal the molecular characteristics and evolution of ceftriaxone-resistant penA 60.001 isolates. Methods: The minimum inhibitory concentrations (MICs) of antibiotics against 4113 isolates were detected by the agar dilution method. N. gonorrhoeae multiantigen sequence typing (NG-MAST), multilocus sequence typing (MLST) and N.gonorrhoeae sequence typing for antimicrobial resistance (NG-STAR) were used to identify the sequence types. Genome analysis was conducted to analyze resistance genes, virulence factors, and evolutionary sources. Results: Isolates with decreased ceftriaxone susceptibility have increased from 2.05% (2016) to 16.18% (2019). Six ceftriaxone-resistant isolates possessing penA 60.001 appeared in Guangdong Province, and were resistant to ceftriaxone, penicillin, tetracycline, ciprofloxacin and cefixime, but susceptible to azithromycin and spectinomycin. Single-nucleotide polymorphisms (SNPs) in the porB gene were the major cause of different NG-MAST types. ST1903 was the main NG-STAR genotype and only strain-ZH545 was ST7365, with molecular features consistent with the MICs. Furthermore, different MLSTs suggested diverse evolutionary sources. Genome analysis revealed a set of virulence factors along with the resistance genes "penA" and "blaTEM-1B". Half of penA 60.001 strains were fully mixed with global FC428-related strains. Conclusions: Global FC428-related clones have disseminated across Guangdong, possibly causing decreased ceftriaxone susceptibility. Enhanced gonococcal surveillance will help elucidate the trajectory of transmission and curb further dissemination.


Assuntos
Antibacterianos/farmacologia , Ceftriaxona/farmacologia , Gonorreia/microbiologia , Neisseria gonorrhoeae/efeitos dos fármacos , Azitromicina/farmacologia , China/epidemiologia , Ciprofloxacina/farmacologia , Farmacorresistência Bacteriana , Genoma Bacteriano , Gonorreia/tratamento farmacológico , Humanos , Testes de Sensibilidade Microbiana , Epidemiologia Molecular , Tipagem de Sequências Multilocus , Neisseria gonorrhoeae/classificação , Neisseria gonorrhoeae/genética , Neisseria gonorrhoeae/isolamento & purificação , Espectinomicina/farmacologia
7.
PLoS One ; 17(1): e0262242, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35061780

RESUMO

OBJECTIVES: To develop a simple DNA sequencing test for simultaneous identification and antimicrobial resistance (AMR) detection of multiple sexually transmitted infections (STIs). METHODS: Real-time PCR (qPCR) was initially performed to identify Neisseria gonorrhoeae (NG), Chlamydia trachomatis (CT), Mycoplasma genitalium (MG) and Trichomonas vaginalis (TV) infections among a total of 200 vulvo-vaginal swab samples from female sex workers in Ecuador. qPCR positive samples plus qPCR negative controls for these STIs were subjected to single gene targeted PCR MinION-nanopore sequencing using the smartphone operated MinIT. RESULTS: Among 200 vulvo-vaginal swab samples 43 were qPCR positive for at least one of the STIs. Single gene targeted nanopore sequencing generally yielded higher pathogen specific read counts in qPCR positive samples than qPCR negative controls. Of the 26 CT, NG or MG infections identified by qPCR, 25 were clearly distinguishable from qPCR negative controls by read count. Discrimination of TV qPCR positives from qPCR negative controls was poorer as many had low pathogen loads (qPCR cycle threshold >35) which produced few specific reads. Real-time AMR profiling revealed that 3/3 NG samples identified had gyrA mutations associated with fluoroquinolone resistance, 2/10 of TV had mutations related to metronidazole resistance, while none of the MG samples possessed 23S rRNA gene mutations contributing to macrolide resistance. CONCLUSIONS: Single gene targeted nanopore sequencing for diagnosing and simultaneously identifying key antimicrobial resistance markers for four common genital STIs shows promise. Further work to optimise accuracy, reduce costs and improve speed may allow sustainable approaches for managing STIs and emerging AMR in resource poor and laboratory limited settings.


Assuntos
Farmacorresistência Bacteriana/genética , Mycoplasma genitalium/genética , Neisseria gonorrhoeae/genética , Infecções Sexualmente Transmissíveis/diagnóstico , Trichomonas vaginalis/genética , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , DNA Girase/genética , Equador , Feminino , Fluoroquinolonas/farmacologia , Fluoroquinolonas/uso terapêutico , Humanos , Macrolídeos/farmacologia , Mycoplasma genitalium/efeitos dos fármacos , Mycoplasma genitalium/isolamento & purificação , Sequenciamento por Nanoporos , Neisseria gonorrhoeae/efeitos dos fármacos , Neisseria gonorrhoeae/isolamento & purificação , RNA Ribossômico 23S/química , RNA Ribossômico 23S/genética , RNA Ribossômico 23S/metabolismo , Reação em Cadeia da Polimerase em Tempo Real , Profissionais do Sexo , Infecções Sexualmente Transmissíveis/tratamento farmacológico , Infecções Sexualmente Transmissíveis/microbiologia , Trichomonas vaginalis/efeitos dos fármacos , Trichomonas vaginalis/isolamento & purificação , Vagina/microbiologia
8.
Sex Transm Infect ; 98(1): 11-16, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-33436503

RESUMO

OBJECTIVE: Chlamydia and gonorrhoea are common sexually transmitted infections that infect the oropharynx, anorectum and urethra in men who have sex with men (MSM). This study aimed to examine the pattern of infection at more than one site (multisite) for chlamydia and gonorrhoea among MSM. METHODS: This was a retrospective study of MSM attending the Melbourne Sexual Health Centre for the first time between 2018 and 2019. We included MSM aged ≥16 years who had tested for Neisseria gonorrhoeae and Chlamydia trachomatis at all three sites (oropharynx, anorectum and urethra). We compared infections that occurred at a single site (termed single-site infection) and those that occurred at more than one site (termed multisite infections). RESULTS: Of the 3938 men who were tested for chlamydia and gonorrhoea, 498/3938 men (12.6%, 95% CI 11.5% to 13.6%) had chlamydia at any site, of whom 400/498 (80.3%, 95% CI 78.9% to 81.2%) had single-site chlamydia infection, and 98/498 (19.7%, 95% CI 16.2% to 23.1%) had multisite infections. A similar proportion of men had gonorrhoea at any site (447/3938, 11.4%, 95% CI 10.3% to 12.2%), but among these 447 men, single-site infection was less common (256/447, 57.3%, 95% CI 52.6% to 61.7%, p<0.001) and multisite infection (191/447, 42.7%, 95% CI 38.2% to 47.3%, p<0.001) was more common than chlamydia. There were also marked differences by anatomical site. Urethral infection commonly occurred as single sites (75/122, 61.5%, 95% CI 52.8% to 70.1%) for chlamydia but uncommonly occurred for gonorrhoea (12/100, 12.0%, 95% CI 5.6% to 18.3%, p<0.001). In contrast, anorectal infection uncommonly occurred as multisite infection for chlamydia (98/394, 24.9%, 95% CI 20.6% to 29.1%) but was common (184/309, 59.5%, 95% CI 54.0% to 64.9%, p<0.001) for gonorrhoea. CONCLUSIONS: The markedly different pattern of site-specific infection for chlamydia and gonorrhoea infections among the same MSM suggests significant differences in the transmissibility between anatomical sites and the duration of each infection at each site.


Assuntos
Infecções por Chlamydia/epidemiologia , Gonorreia/epidemiologia , Homossexualidade Masculina/estatística & dados numéricos , Orofaringe/microbiologia , Reto/microbiologia , Infecções Sexualmente Transmissíveis/epidemiologia , Uretra/microbiologia , Adulto , Chlamydia trachomatis/genética , Chlamydia trachomatis/isolamento & purificação , Humanos , Masculino , Neisseria gonorrhoeae/genética , Neisseria gonorrhoeae/isolamento & purificação , Estudos Retrospectivos , Comportamento Sexual , Infecções Sexualmente Transmissíveis/microbiologia
9.
Sex Transm Infect ; 98(2): 139-141, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-33526591

RESUMO

BACKGROUND: In a previous study of men attending Melbourne Sexual Health Centre who had Neisseria gonorrhoeae detected by urine Aptima Combo 2 (AC2) testing, 11% were asymptomatic. This study aimed to determine whether N. gonorrhoeae can be cultured from asymptomatic men screening positive for N. gonorrhoeae by nucleic acid amplification testing (NAAT) of urine. METHODS: Between 1 July 2017 and 31 March 2019, all men attending Melbourne Sexual Health Centre were tested for N. gonorrhoeae by AC2 testing of urine whether urethral symptoms were reported or not. NAAT-positive men were recalled and a urethral swab performed for gonococcal culture using modified Thayer-Martin media with determination of minimum inhibitory concentrations (MICs) by agar dilution. RESULTS: There were 1001 cases (860 individuals) positive for N. gonorrhoeae by urine AC2: 892 (89%) reported urethral symptoms; 109 (11%) did not. Twenty-five asymptomatic cases were excluded because of antibiotic use at or following screening. Of the remaining 84 asymptomatic men, 41 (49%) had a urethral swab performed a median of 5 days after screening. Twenty-one men had urethral discharge at the return visit, 11 of whom reported the discharge at the return visit. Of the 41 men who were swabbed, 31 (76%; 95% CI 60% to 88%) were culture positive for N. gonorrhoeae. Among the 21 men who subsequently developed discharge, 19 (90%; 95% CI 70% to 99%) were culture positive. Among the 20 men who remained asymptomatic, 12 (60%; 95% CI 36% to 81%) were culture positive. MIC profiles were obtained from all isolates. CONCLUSIONS: Gonorrhoea was isolated in most but not all asymptomatic men screening positive for N. gonorrhoeae by urine NAAT. Clinicians should consider performing urethral culture in such men to ensure optimal surveillance for antimicrobial resistance. Isolation of N. gonorrhoeae by culture in men without discharge indicates these are true infections with viable organisms.


Assuntos
Portador Sadio/diagnóstico , Portador Sadio/microbiologia , Gonorreia/diagnóstico , Gonorreia/urina , Neisseria gonorrhoeae/genética , Técnicas de Amplificação de Ácido Nucleico/métodos , Uretra/microbiologia , Adulto , Austrália/epidemiologia , Gonorreia/epidemiologia , Gonorreia/microbiologia , Humanos , Masculino , Neisseria gonorrhoeae/isolamento & purificação , Uretrite/epidemiologia , Uretrite/microbiologia
10.
Sex Transm Infect ; 98(2): 121-124, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-33632890

RESUMO

OBJECTIVES: European guidelines advise the use of dual nucleic acid amplification tests (NAAT) in order to minimise the inappropriate diagnosis of Neisseria gonorrhoeae (Ng) in urogenital samples from low prevalence areas and in extragenital specimens. In this cross-sectional study, we investigated the effect of confirmatory testing and confirmation policy on the Ng-positivity in a population visiting the sexual health clinic in Rotterdam, the Netherlands. METHODS: Apart from urogenital testing, extragenital (oropharyngeal/anorectal) testing was performed for men who have sex with men (MSM) and according to sexual exposure for women and heterosexual men. Ng detection using NAAT was performed using BD Viper and for confirmatory testing BD MAX. Sexual transmitted infection consultation data were merged with diagnostic data from August 2015 through May 2016. RESULTS: In women (n=4175), oral testing was performed in 84% and 22% were tested anally. In MSM (n=1828), these percentages were 97% and 96%, respectively. Heterosexual men (n=3089) were tested urogenitally. After confirmatory testing, oropharyngeal positivity rates decreased from 7.3% (95% CI 6.5 to 8.2) to 1.5% (95% CI 1.1 to 1.8) in women and from 13.9% (95% CI 12.3 to 15.5) to 5.4% (95% CI 4.3 to 6.4) in MSM. Anorectal positivity rates decreased from 2.6% (95% CI 1.6 to 3.7) to 1.8% (95% CI 0.9 to 2.6) in women and from 9.3% (95% CI 7.9 to 10.7) to 7.2% (95% CI 6.0 to 8.5) in MSM. Urogenital Ng-positivity rate ranged between 3.0% and 4.4% and after confirmation between 2.3% and 3.9%. When confirming oropharyngeal samples, Ng-positivity was 3.8% in women, 3.0% in heterosexual men and 12.5% in MSM. Additional confirmation of urogenital and anorectal samples led to 3.0% Ng positivity in women, 2.7% in heterosexual men and 11.4% in MSM. CONCLUSIONS: Confirmation of urogenital and anorectal samples reduced the Ng-positivity rates, especially for women. However, as there is no gold standard for the confirmation of Ng infection, the dilemma within public health settings is to choose between two evils: missing diagnoses or overtreatment. In view of the large decrease in oropharyngeal positivity, confirmation Ng-positivity in oropharyngeal samples remains essential to avoid unnecessary treatment.


Assuntos
Gonorreia/tratamento farmacológico , Gonorreia/epidemiologia , Heterossexualidade/estatística & dados numéricos , Homossexualidade Masculina/estatística & dados numéricos , Técnicas de Diagnóstico Molecular/métodos , Neisseria gonorrhoeae/genética , Saúde Sexual , Estudos Transversais , Feminino , Gonorreia/diagnóstico , Humanos , Masculino , Técnicas de Diagnóstico Molecular/normas , Neisseria gonorrhoeae/isolamento & purificação , Países Baixos/epidemiologia , Prevalência , Estudos Retrospectivos , Comportamento Sexual
11.
S Afr Med J ; 111(10): 995-997, 2021 Oct 05.
Artigo em Inglês | MEDLINE | ID: mdl-34949296

RESUMO

BACKGROUND: Reports have emerged globally of antimicrobial resistance (AMR) in Neisseria gonorrhoeae and Mycoplasma genitalium infections. In South Africa (SA), there are substantial differences between private and public healthcare with regard to antimicrobial drug prescribing practice, which could affect AMR patterns of private and public healthcare patients. OBJECTIVES: To perform a pilot study to determine the frequency of AMR of N. gonorrhoeae and M. genitalium in patients accessing SA's private healthcare sector. METHODS: In this cross-sectional study, N. gonorrhoeae-positive cultures and M. genitalium DNA samples were collected from a private healthcare reference laboratory from August 2018 to August 2019. In N. gonorrhoeae-positive cultures, antimicrobial susceptibility testing was performed, followed by N. gonorrhoeae multiantigen sequence typing (NG-MAST) to determine genetic relatedness of the isolates. To determine macrolide and fluoroquinolone resistance rates, M. genitalium-positive samples were analysed by sequencing the 23S rRNA, gyrA and parC genes. RESULTS: Twenty-one N. gonorrhoeae- and 27 M. genitalium-positive specimens were included in this analysis. High rates of resistance were detected among gonococcal isolates, with 90% resistance to tetracycline, 86% to penicillin and 62% to ciprofloxacin, but no resistance to azithromycin, cefixime and ceftriaxone. NG-MAST revealed genetically diverse isolates with 83% novel NG-MAST sequence types. Macrolide and fluoroquinolone resistance-associated mutations were detected in 18.5% (n=5/27) and 7.4% (n=2/27) of M. genitalium strains, respectively. CONCLUSIONS: We observed high frequencies of ciprofloxacin, penicillin and tetracycline resistance in N. gonorrhoeae and macrolide resistance-associated mutations in M. genitalium in private healthcare sector patients in SA. This finding highlights the need to use diagnostics for sexually transmitted infections and to include the private healthcare sector in antimicrobial surveillance and stewardship programmes.


Assuntos
Antibacterianos/uso terapêutico , Farmacorresistência Bacteriana , Gonorreia/tratamento farmacológico , Infecções por Mycoplasma/tratamento farmacológico , Mycoplasma genitalium/efeitos dos fármacos , Neisseria gonorrhoeae/efeitos dos fármacos , Estudos Transversais , Feminino , Gonorreia/epidemiologia , Humanos , Masculino , Testes de Sensibilidade Microbiana , Infecções por Mycoplasma/epidemiologia , Mycoplasma genitalium/isolamento & purificação , Neisseria gonorrhoeae/isolamento & purificação , Projetos Piloto , Setor Privado , África do Sul
12.
Microbiol Spectr ; 9(2): e0018121, 2021 10 31.
Artigo em Inglês | MEDLINE | ID: mdl-34668731

RESUMO

This study was conducted to determine the in vitro activities of gentamicin alone and in combination with ceftriaxone, ertapenem, and azithromycin against multidrug-resistant (MDR) Neisseria gonorrhoeae isolates. A total of 407 clinical isolates from Nanjing, China, obtained in 2016 to 2017, had MICs determined for gentamicin using the agar dilution method. MDR status was ascribed to 97 strains that displayed decreased susceptibility or resistance to extended-spectrum cephalosporins (ESCs) (ceftriaxone [MIC, ≥0.125 mg/liter] and cefixime [MIC, ≥0.25 mg/liter]), plus resistance to at least two of the following antimicrobials: penicillin (MIC, ≥2 mg/liter), ciprofloxacin (MIC, ≥1 mg/liter), and azithromycin (MIC, ≥1 mg/liter). MDR strains underwent MIC determinations for antimicrobial combinations using the antimicrobial gradient epsilometer test (Etest). Results that ranged from synergy to antagonism were interpreted using the fractional inhibitory concentration (FICI). All 407 gonococcal isolates were susceptible to gentamicin; MICs ranged from 2 mg/liter to 16 mg/liter. Synergy was demonstrated in 16.5% (16/97), 27.8% (27/97), and 8.2% (8/97) of MDR strains when gentamicin was combined with ceftriaxone (geometric mean [GM] FICI, 0.747), ertapenem (GM FICI, 0.662), and azithromycin (GM FICI, 1.021), respectively. No antimicrobial antagonism was observed with any combination tested against MDR strains; overall, antimicrobial combinations were indifferent. The GM MICs of gentamicin were reduced by 2.63-, 3.80-, and 1.98-fold when tested in combination with ceftriaxone, ertapenem, and azithromycin, respectively. The GM MICs of the three additional antimicrobials individually were reduced by 3-, 2.57-, and 1.98-fold, respectively, when each was tested in combination with gentamicin. Gentamicin alone was effective in vitro against N. gonorrhoeae, including MDR isolates. Combination testing of MDR strains showed lower MICs against gentamicin and each of three antimicrobials (ceftriaxone, ertapenem, and azithromycin) when used in combination. IMPORTANCE Antimicrobial-resistant Neisseria gonorrhoeae is a major global public health concern. New treatment options are urgently needed to successfully treat multidrug-resistant (MDR) Neisseria gonorrhoeae infections. This study showed that gentamicin maintained excellent in vitro susceptibility against clinical gonococcal isolates collected in 2016 and 2017, including MDR isolates. Combinations of gentamicin plus ertapenem, ceftriaxone, and azithromycin produced synergistic effects against certain MDR isolates. No antagonism was observed in any of the antimicrobial combinations, which may prove useful to guide clinical testing of combination therapies.


Assuntos
Antibacterianos/farmacologia , Azitromicina/farmacologia , Ceftriaxona/farmacologia , Ertapenem/farmacologia , Gentamicinas/farmacologia , Neisseria gonorrhoeae/efeitos dos fármacos , Farmacorresistência Bacteriana Múltipla/genética , Sinergismo Farmacológico , Quimioterapia Combinada , Gonorreia/tratamento farmacológico , Gonorreia/microbiologia , Humanos , Testes de Sensibilidade Microbiana , Neisseria gonorrhoeae/genética , Neisseria gonorrhoeae/isolamento & purificação
13.
Genes (Basel) ; 12(9)2021 08 25.
Artigo em Inglês | MEDLINE | ID: mdl-34573293

RESUMO

There is growing concern about the emergence and spread of multidrug-resistant Neisseria gonorrhoeae. To effectively control antibiotic-resistant bacterial pathogens, it is necessary to develop new antimicrobials and to understand the resistance mechanisms to existing antibiotics. In this study, we discovered the unexpected onset of drug resistance in N. gonorrhoeae caused by amino acid substitutions in the periplasmic chaperone SurA and the ß-barrel assembly machinery component BamA. Here, we investigated the i19.05 clinical isolate with mutations in corresponding genes along with reduced susceptibility to penicillin, tetracycline, and azithromycin. The mutant strain NG05 (surAmut bamAmut, and penAmut) was obtained using the pan-susceptible n01.08 clinical isolate as a recipient in the transformation procedure. Comparative proteomic analysis of NG05 and n01.08 strains revealed significantly increased levels of other chaperones, Skp and FkpA, and some transport proteins. Efflux pump inhibition experiments demonstrated that the reduction in sensitivity was achieved due to the activity of efflux pumps. We hypothesize that the described mutations in the surA and bamA genes cause the qualitative and quantitative changes of periplasmic chaperones, which in turn alters the function of synthesized cell envelope proteins.


Assuntos
Antibacterianos/farmacologia , Proteínas da Membrana Bacteriana Externa/genética , Farmacorresistência Bacteriana Múltipla/genética , Gonorreia/tratamento farmacológico , Neisseria gonorrhoeae/genética , Substituição de Aminoácidos , Azitromicina/farmacologia , Gonorreia/microbiologia , Humanos , Mutação , Neisseria gonorrhoeae/efeitos dos fármacos , Neisseria gonorrhoeae/isolamento & purificação , Penicilinas/farmacologia , Proteômica , Tetraciclina/farmacologia
14.
PLoS One ; 16(9): e0255878, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34570799

RESUMO

BACKGROUND: The COVID-19 pandemic illuminated the benefits of telemedicine. Self-collected specimens are a promising alternative to clinician-collected specimens when in-person testing is not feasible. In this study, we assessed the adequacy of self-collected pharyngeal and rectal specimens for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae among individuals undergoing chlamydia and gonorrhea screening. METHODS: We used data from a large cohort study that included male and female adolescents between the ages of 12-24 years. We considered self-collected specimens adequate for clinical use if the human synthase gene (a control target of the assay) was detected in the specimen. RESULTS: In total, 2,458 specimens were included in the analysis. The human synthase gene was detected in 99.2% (2,439/2,458) of all self-collected specimens, 99.5% (1,108/1,114) of the pharyngeal specimens, and 99.0% (1,331/1,344) of the rectal specimens. CONCLUSION: Self-collected pharyngeal and rectal specimens demonstrated a very high proportion of human gene presence, suggesting that self-collection was accurate. A limitation of this study is that the sample adequacy control detects the presence or absence of the human hydroxymethylbilane synthase gene, but it does not indicate the specific anatomic origin of the human hydroxymethylbilane synthase gene. Self-collected specimens may be an appropriate alternative to clinician-collected specimens.


Assuntos
Infecções por Chlamydia/diagnóstico , Chlamydia trachomatis/isolamento & purificação , Gonorreia/diagnóstico , Neisseria gonorrhoeae/isolamento & purificação , Manejo de Espécimes , Adolescente , Criança , Infecções por Chlamydia/microbiologia , Feminino , Gonorreia/microbiologia , Infecções por HIV , Humanos , Masculino , Faringe/microbiologia , Reação em Cadeia da Polimerase , Reto/microbiologia , Autocuidado , Adulto Jovem
15.
J Med Microbiol ; 70(9)2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34494952

RESUMO

Introduction. Gonorrhoea is a sexually transmitted disease whose incidence has increased in recent years and adult gonococcal conjunctivitis (AGC) is a relatively uncommon complication.Hypothesis/Gap Statement. AGC is associated with increased incidence of genital gonorrhoea and must be treated correctly to avoid serious corneal complications.Aims. To report the prevalence, clinical features, and complications of AGC in a tertiary ophthalmology centre in Barcelona, Spain. Present epidemiological data, clinical features, ocular complications, and antibiotic susceptibility. Design: Single-centre, descriptive, retrospective case series.Methodology. Systematic case-defined search in medical records and further retrospective chart review study of microbiologically confirmed AGC attending outpatient clinic and/or emergency room from 2012 to 2020. We analysed the clinical presentation, treatments, antibiotic susceptibility, complications and ocular sequelae.Results. Thirteen patients were diagnosed of AGC. Eleven patients had unilateral presentation. Two patients had bilateral presentation. In ten cases there was abundant mucopurulent discharge, three cases presented periocular pain and periocular inflammation requiring a CT scan to rule out post-septal cellulitis. The diagnosis was confirmed by culture. In total, 100 % of strains were susceptible to ceftriaxone, 58 % were ciprofloxacin resistant and no beta-lactamase production was detected. Three patients required hospital admission. One patient developed a complication presenting with ptosis caused by superior symblepharon.Conclusion. AGC is a rare disease which is difficult to diagnose as it requires a high index of suspicion to prevent corneal perforation but in an important number of cases it may mimic orbital cellulitis. It is crucial that treatment starts as soon as possible to avoid serious corneal damage. Patients should promptly receive complete and correct treatment when admitted to the emergency room since an elevated number of patients do not attend their medical follow-up visit. Azithromycin or aminoglycoside eye drops are probably the best option to complete the treatment, due to high quinolone resistance.


Assuntos
Conjuntivite Bacteriana , Gonorreia , Neisseria gonorrhoeae/isolamento & purificação , Soluções Oftálmicas/uso terapêutico , Adolescente , Adulto , Aminoglicosídeos/uso terapêutico , Antibacterianos/uso terapêutico , Azitromicina/uso terapêutico , Conjuntivite Bacteriana/tratamento farmacológico , Conjuntivite Bacteriana/epidemiologia , Gonorreia/tratamento farmacológico , Gonorreia/epidemiologia , Humanos , Pessoa de Meia-Idade , Prevalência , Estudos Retrospectivos , Espanha/epidemiologia , Adulto Jovem
16.
J Int AIDS Soc ; 24(9): e25801, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34496152

RESUMO

INTRODUCTION: Provider-collected swabs are an unappealing procedure for many transgender women and may have led to suboptimal rates of Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG) testing. Self-collection for CT/NG testing is recommended for men who have sex with men. However, the information on acceptability and clinical performance to support a recommendation for transgender women is lacking. We aimed to determine the acceptability and satisfaction towards self-collection for CT/NG testing among Thai transgender women. METHODS: Thai transgender women who attended Tangerine Clinic (a transgender-led, integrated, gender-affirming care and sexual health services clinic in Bangkok, Thailand) between May and July 2020 and had condomless sexual intercourse within the past six months were offered to collect urine and perform self-swabs of pharyngeal, rectal, and if applicable, neovaginal compartments for pooled nucleic acid amplification testing for CT/NG infections. Participants received a diagram, video and oral instructions about how to perform self-collection procedure. Those who accepted self-collection were also offered to receive provider collection to evaluate the performance between the two methods. Self-administered questionnaires were used to assess satisfaction. RESULTS: Among 216 transgender women enrolled, 142 (65.7%) accepted self-collection. All who accepted had pharyngeal, rectal and urine samples collected. Of 31 transgender women who had undergone genital surgery, 28 (90.3%) accepted neovaginal self-swab. The acceptance rate increased from 46.2% in May to 84.5% in July 2020. One participant had an invalid result. All transgender women who accepted self-collection could perform it without assistance, and 82.8% were highly satisfied with the method. None reported dissatisfaction. Due to the COVID-19 pandemic, provider collection services were discontinued early, and only eight transgender women were able to perform both methods for performance evaluation. The performance agreement was 100%. CONCLUSIONS: Thai transgender women had high acceptability and satisfaction towards self-collection for CT/NG testing. The performance was promising compared to provider collection. Our results support the implementation of self-collection to the sexually transmitted infection services, particularly during the COVID-19 pandemic where physical distancing is the new normal. A larger study is warranted to determine the performance of self-collection for CT/NG testing in each anatomical compartment and confirm the performance between self-collection and provider collection.


Assuntos
Infecções por Chlamydia/diagnóstico , Chlamydia trachomatis/isolamento & purificação , Gonorreia/diagnóstico , Neisseria gonorrhoeae/isolamento & purificação , Aceitação pelo Paciente de Cuidados de Saúde , Satisfação Pessoal , Manejo de Espécimes/métodos , Pessoas Transgênero , Adulto , COVID-19 , Infecções por Chlamydia/epidemiologia , Feminino , Gonorreia/epidemiologia , Humanos , Masculino , Pandemias , SARS-CoV-2 , Autocuidado , Tailândia/epidemiologia
17.
J Infect Dis ; 224(12 Suppl 2): S56-S63, 2021 08 16.
Artigo em Inglês | MEDLINE | ID: mdl-34396410

RESUMO

While infection by Neisseria gonorrhoeae is often asymptomatic in women, undetected infections can ascend into the upper genital tract to elicit an inflammatory response that manifests as pelvic inflammatory disease, with the outcomes depending on the intensity and duration of inflammation and whether it is localized to the endometrial, fallopian tube, ovarian, and/or other tissues. This review examines the contribution of N. gonorrhoeae versus other potential causes of pelvic inflammatory disease by considering new insights gained through molecular, immunological, and microbiome-based analyses, and the current epidemiological burden of infection, with an aim to highlighting key areas for future study.


Assuntos
Infecções por Chlamydia/epidemiologia , Gonorreia/epidemiologia , Neisseria gonorrhoeae/isolamento & purificação , Doença Inflamatória Pélvica/epidemiologia , Infecções por Chlamydia/complicações , Endometrite/microbiologia , Endométrio/microbiologia , Endométrio/patologia , Tubas Uterinas/microbiologia , Feminino , Gonorreia/diagnóstico , Humanos , Doença Inflamatória Pélvica/diagnóstico , Doença Inflamatória Pélvica/microbiologia
18.
J Infect Dis ; 224(12 Suppl 2): S39-S46, 2021 08 16.
Artigo em Inglês | MEDLINE | ID: mdl-34396413

RESUMO

Pelvic inflammatory disease (PID) results from ascension of sexually transmitted pathogens from the lower genital tract to the uterus and/or fallopian tubes in women, with potential spread to neighboring pelvic organs. Patients may present acutely with lower abdominal or pelvic pain and pelvic organ tenderness. Many have subtle symptoms or are asymptomatic and present later with tubal factor infertility, ectopic pregnancy, or chronic pelvic pain. Neisseria gonorrhoeae and Chlamydia trachomatis are the 2 most commonly recognized PID pathogens. Their ability to survive within host epithelial cells and neutrophils highlights a need for T-cell-mediated production of interferon γ in protection. Data indicate that for both pathogens, antibody can accelerate clearance by enhancing opsonophagocytosis and bacterial killing when interferon γ is present. A study of women with N. gonorrhoeae- and/or C. trachomatis-induced PID with histologic endometritis revealed activation of myeloid cell, cell death, and innate inflammatory pathways in conjunction with dampening of T-cell activation pathways. These findings are supported by multiple studies in mouse models of monoinfection with N. gonorrhoeae or Chlamydia spp. Both pathogens exert multiple mechanisms of immune evasion that benefit themselves and each other at the expense of the host. However, similarities in host immune mechanisms that defend against these 2 bacterial pathogens instill optimism for the prospects of a combined vaccine for prevention of PID and infections in both women and men.


Assuntos
Infecções por Chlamydia/complicações , Chlamydia trachomatis/isolamento & purificação , Gonorreia/complicações , Neisseria gonorrhoeae/isolamento & purificação , Doença Inflamatória Pélvica/microbiologia , Feminino , Humanos , Evasão da Resposta Imune , Interferon gama , Doença Inflamatória Pélvica/diagnóstico , Doença Inflamatória Pélvica/epidemiologia , Dor Pélvica/etiologia , Gravidez
19.
Diagn Microbiol Infect Dis ; 101(4): 115484, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34419740

RESUMO

Gepotidacin is a triazaacenaphthylene antibiotic with activity against Neisseria gonorrhoeae including strains resistant to current agents. We tested 145 N. gonorrhoeae isolates by agar dilution according to Gonococcal Isolate Surveillance Program and Clinical and Laboratory Standards Institute methodologies. Gepotidacin demonstrated a minimum inhibitory concentration (MIC)50 of 0.25 µg/mL and a MIC90 of 0.5 µg/mL (highest gepotidacin MIC was 1 µg/mL) against the 145 N. gonorrhoeae isolates tested. We also assessed the impact of test variables on antimicrobial susceptibility test results for gepotidacin, ciprofloxacin, and ceftriaxone against 10 N. gonorrhoeae isolates. Media type had the biggest effect but wasn't specific to gepotidacin. Gepotidacin MICs were also affected by inoculum, pH, and 10% CO2. These in vitro data indicate that further study of gepotidacin is warranted for potential use in treating gonorrhea infections and highlight the importance of controlling for media type, inoculum, CO2, and pH when performing MIC testing with gepotidacin.


Assuntos
Acenaftenos/farmacologia , Antibacterianos/farmacologia , Compostos Heterocíclicos com 3 Anéis/farmacologia , Testes de Sensibilidade Microbiana/métodos , Neisseria gonorrhoeae/efeitos dos fármacos , Dióxido de Carbono/análise , Meios de Cultura , Farmacorresistência Bacteriana/efeitos dos fármacos , Gonorreia/microbiologia , Humanos , Concentração de Íons de Hidrogênio , Masculino , Testes de Sensibilidade Microbiana/instrumentação , Neisseria gonorrhoeae/isolamento & purificação
20.
Pan Afr Med J ; 38: 358, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34367437

RESUMO

Gonorrhea is all diseases caused by Neisseria gonorrhoeae. Prepubertal child is more susceptible to N. gonorrhoeae infection because the vagina is alkaline and contains no estrogen. Gonorrhea vaginitis is the most common form of gonorrhoea in prepubertal children beyond neonatal period. Transmission in child can be through sexual contact (abuse) or non-sexual contact. Gonorrhea vaginitis in children more often asymptomatic, with clinical manifestation such as mucopurulent discharge, vaginal pruritus and vulval erythema. Supporting examination comprise of gram staining from vaginal discharge, culture and nucleic acid amplification testing (NAAT). Ceftriaxone is drug of choice gonorrhea without complication in children. We report a case of 4 year and 9-month female girl that was diagnosed by history taking and supporting examination from gram staining and polymerase chain reaction (PCR) from vaginal discharge, and then treated with single dose ceftriaxone 125 mg intramuscular that gave clinical improvement.


Assuntos
Antibacterianos/administração & dosagem , Gonorreia/diagnóstico , Neisseria gonorrhoeae/isolamento & purificação , Vaginose Bacteriana/diagnóstico , Ceftriaxona/administração & dosagem , Pré-Escolar , Feminino , Gonorreia/tratamento farmacológico , Humanos , Reação em Cadeia da Polimerase , Vaginose Bacteriana/tratamento farmacológico , Vaginose Bacteriana/microbiologia
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