Methicillin-resistant and methicillin-sensitive Staphylococcus aureus in pork industry workers, Catalonia, Spain.

Background: Methicillin-resistant S. aureus (MRSA) especially ST398, is a zoonotic agent. This study aimed to determine the prevalence of methicillin-susceptible S. aureus (MSSA) and MRSA among workers in the pork production chain. Methods: 659 workers associated with 123 pig farms, livestock transporters, one pig slaughterhouse, pork transporters and 23 pork butcheries were studied for S. aureus recovery, and all isolates were characterized (antibiotic resistance, MLST and spa-typing). Results: The prevalence of S. aureus was 35.5%, 75.6% of isolates being MRSA. The prevalence of MRSA was 68.7% (149/217) among pig farm, 33.9% (19/56) livestock transporters, 2.9% (9/306) slaughterhouse, 0% in pork transporters (0/36) and butchery workers (0/44). Of the 234 S. aureus-positive workers, 100% (149/149) of pig farm workers, 82.6% (19/23) of livestock transporters, and 16.4% (9/55) of slaughterhouse workers carried MRSA isolates (p < 0.001). Of the workers who had contact with live swine, 61.8% (178/288) were S. aureus-positive, MRSA being detected in 96.1% of cases (p < 0.001). The most frequent lineage among MRSA were: ST398 (97.7%; 173/177) and ST1 (1.7%; 3/177); and among MSSA were ST30 (19.2%; 11/57) and ST5 (10.5%; 6/57). The most frequent spa-types among MRSA were t011 (93.8%, 166/177) and t1451 (2.25%, 4/177), and among MSSA: t084 (10.5%, 6/57) and t021 (7.0%, 4/57). All MRSA isolates showed resistance to tetracycline, 92.7% to clindamycin, 81.9% to erythromycin and 40.1% to cotrimoxazole. Conclusions: Pig industry workers having occupational contact with live animals present a high risk of colonization of MRSA, especially by MRSA-ST398. Prevention measures should be intensified in any employment sector involving live animals.

Drassanes Exprés: a public and confidential testing service for asymptomatic STIs with same-day result notification.

BACKGROUND: STIs are a major public health concern. Screening programmes for asymptomatic users are key components of STI control. Traditional limitations of screening programmes include low population coverage and delays in treatments, thus reducing the expected impact on STI control. In our centre, the normal time from test to results was 4 days, and 7 days until treatment was established.To reduce time to treatment and to increase population coverage, we developed 'Drassanes Exprés', a testing service for asymptomatic STIs. The objectives of this study were to provide a guide for the implementation of a service with these characteristics and to evaluate the results of this intervention. METHODS: The Drassanes Exprés programme was launched in Spain on 07 November 2016 as a public, confidential and free-of-charge testing service for asymptomatic STIs, with same-day result notification. For this walk-in service, confidentiality was obtained by registering all information into the Laboratory Internal Software instead of the Electronic Patient Records. Samples were processed in a point-of-care laboratory and result notification was provided via mail or short message service.Information about workflow, screening protocols and result interpretation is detailed. Additionally, demographic characteristics, STI prevalence, and time from patients' sample collection to notification and treatment are analysed. RESULTS: Between 07 November 2016 and 07 November 2019, 13 993 users attended the Drassanes Exprés screening programme. Of these, 0.5% were transgender people, 29.3% women, 45.2% men who have sex with men and 25.1% men who have sex with women. The median age was 31 years (range: 26-39 years). Overall, 14.6% of users tested positive for at least one STI. The most prevalent infection was Chlamydia trachomatis (8.3%), followed by Neisseria gonorrhoeae (5.7%), syphilis (1.8%), HIV (0.4%) and hepatitis C virus (0.2%). The median time from test to results was 2.4 hours (range: 2-3.1 hours). Of 2049 users diagnosed with an STI, treatment was achieved in 97.0% of cases; the average time to treatment was 2.0 days. CONCLUSIONS: Drassanes Exprés is the first public programme for rapid, asymptomatic, STI screening and treatment in Spain. Assessing high-risk practices and providing confidentiality, easy access and rapid results/treatments are key elements in the development of STI screening programmes.

Encuesta de recursos diagnósticos de las ITS en España / Survey of diagnostic resources for STI in Spain

Introducción: Hay escasa información sobre los recursos disponibles tanto en las consultas como en el laboratorio para hacer frente a las infecciones de transmisión sexual (ITS). El objetivo es describir y conocer la realidad de las consultas y laboratorios que atienden las ITS en España. Métodos: Estudio observacional transversal con obtención de datos mediante una encuesta dirigida a los miembros del Grupo de ITS de la SEIMC (GEITS). Resultados: Se obtuvieron respuestas de 24 centros (tasa de respuesta, 38,1%) pertenecientes a 10comunidades autónomas. Respecto a las consultas de ITS, el 38% precisan que el paciente presente tarjeta sanitaria para proporcionar asistencia, y un 31,8% solo la prestan mediante derivación de otro médico. El 52,4% realizan métodos diagnósticos en la propia consulta. El 18,2% de los laboratorios no ofrecen pruebas diagnósticas de respuesta inmediata, aunque el 100% disponen de PCR frente a Neisseria gonorrhoeae y Chlamydia trachomatis, el 47,8% frente a Mycoplasma genitalium y el 65% detectan genotipos del linfogranuloma venéreo. El 20% realizan técnicas de detección molecular de resistencias antimicrobianas. Todos los laboratorios realizan cultivo y técnicas de sensibilidad a gonococo. Conclusiones: Existe una gran variabilidad en las dotaciones de medios humanos y materiales en las consultas y en los laboratorios que atienden ITS. En un número importante de centros existen limitaciones para el acceso de los pacientes. Todos los laboratorios disponen de técnicas de biología molecular y detectan la infección de N.gonorrhoeae mediante PCR y cultivo, lo que permite la realización de pruebas de sensibilidad en todos los centros.(AU)

Background: Scarce information is available on the resources to deal with the Sexually Transmitted Infections (STIs), both in the clinic and in the laboratory. The objective is to describe and know the reality of the clinics and laboratories that treat these infections in Spain. Methods: Cross-sectional observational study with data collection through a survey aimed at the members of the GEITS Group. Results: Responses were obtained from 24 centers (response rate 38.1%) belonging to 10Autonomous Communities. Regarding STI consultations, 38% require that the patient present a health card to provide assistance, and 31.8% only provide it by referral from another doctor. The 52.4% perform diagnostic methods in the care center. Regarding laboratories, 18.2% do not offer immediate response diagnostic tests, although 100% have PCR against Neisseria gonorrhoeae and Chlamydia trachomatis, 47.8% against Mycoplasma genitalium and 65% detect lymphogranuloma venereum genotypes. All laboratories continue to perform culture and gonococcal sensitivity techniques, and 20% perform molecular methods for detection of MG antimicrobial resistance. Conclusion: There is great variability in the provision of human and material resources both in the clinics and in the laboratories that attend STIs. In a significant number of centers there are limitations for patient access. Although laboratories have molecular biology technologies, not all of them offer immediate response tests. All laboratories detect N.gonorrhoeae infection by PCR and also by culture, which allows sensitivity testing in all centers.(AU)

Risk Factors for Relapse in Acute Bacterial Prostatitis: the Impact of Antibiotic Regimens.

The aim of the study was to analyze the risk factors for relapse in patients with acute bacterial prostatitis (ABP), focusing on the impact of different antibiotic regimens. We conducted an observational study of all patients diagnosed with ABP (irritative and/or obstructive urinary symptoms, temperature of >37.8°C, and the presence of bacteriuria in urine culture, in the absence of data suggesting pyelonephritis) from January 2017 to December 2018. The main outcome was relapse. We performed a multivariate analysis to identify the risk factors associated with relapse. A propensity score with inverse weighting was applied to attenuate antibiotic selection bias. We included 410 patients. The mean age was 68 years; 28.8% had diabetes mellitus, and 61.1% benign prostatic hyperplasia. The most common isolated bacteria were Escherichia coli (62.4%) and Klebsiella spp. (10%). The overall resistance rate was 39.5% to quinolones. The mortality rate was 1.2%, and the relapse rate was 6.3%. The only independent risk factor for relapse was inadequate antibiotic therapy (odds ratio [OR] 12.3; 95% confidence interval [95% CI], 3.5 to 43.1). When the antibiotic was modified according to the susceptibility pattern, the rates of relapse were 1.8% in those treated with ciprofloxacin, 3.6% with intravenous beta-lactam, 9.3% with co-trimoxazole, and 9.8% with oral (p.o.) beta-lactam (P = 0.03). Treatment with oral beta-lactam (OR, 5.3; 95% CI, 1.2 to 23.3) and co-trimoxazole (OR, 4.9; 95% CI, 1.1 to 23.2) were associated with a risk of relapse. In this large real-life observational study, a significantly higher relapse rate was observed when antibiotic treatment was inadequate. When the antibiotic was tailored, quinolones and intravenous beta-lactams had a lower relapse rate than co-trimoxazole and oral beta-lactams. IMPORTANCE In the manuscript, we report a large series of acute bacterial prostatitis cases and describe data about the etiology, antibiotic resistance rate, and outcome, specially focused on the risk factors for relapse. We found high rates of resistance to the most frequently used antibiotics and a high relapse rate in patients whose treatment was not adjusted according to their microbiological susceptibility. We did not observe differences, though, in mortality or relapse according to appropriate or inappropriate empirical treatment. What is new in this article is the different relapse rates observed depending upon the definitive adequate antibiotic used. Quinolones and intravenous (i.v.) beta-lactam have lower rates of relapse (1.8% and 3.6%, respectively) compared to co-trimoxazole and oral (p.o.) beta-lactam (3.3% and 9.8%, respectively). Clinicians should carefully choose an adequate antibiotic for definitive ABP treatment depending on the results of microbiological isolation, using quinolones as the first option. Whenever quinolones cannot be administered, i.v. beta-lactams seem to be the second-best option.

Survey of diagnostic resources for STI in Spain.

BACKGROUND: Scarce information is available on the resources to deal with the Sexually Transmitted Infections (STIs), both in the clinic and in the laboratory. The objective is to describe and know the reality of the clinics and laboratories that treat these infections in Spain. METHODS: Cross-sectional observational study with data collection through a survey aimed at the members of the GEITS Group. RESULTS: Responses were obtained from 24 centers (response rate 38.1%) belonging to 10 Autonomous Communities. Regarding STI consultations, 38% require that the patient present a health card to provide assistance, and 31.8% only provide it by referral from another doctor. The 52.4% perform diagnostic methods in the care center. Regarding laboratories, 18.2% do not offer immediate response diagnostic tests, although 100% have PCR against Neisseria gonorrhoeae and Chlamydia trachomatis, 47.8% against Mycoplasma genitalium and 65% detect lymphogranuloma venereum genotypes. All laboratories continue to perform culture and gonococcal sensitivity techniques, and 20% perform molecular methods for detection of MG antimicrobial resistance. CONCLUSION: There is great variability in the provision of human and material resources both in the clinics and in the laboratories that attend STIs. In a significant number of centers there are limitations for patient access. Although laboratories have molecular biology technologies, not all of them offer immediate response tests. All laboratories detect N. gonorrhoeae infection by PCR and also by culture, which allows sensitivity testing in all centers.

Multilocus sequence typing of Treponema pallidum subsp. pallidum in Barcelona.

Aim: To implement the multilocus sequence typing (MLST) methodology in syphilis samples previously characterized by enhanced CDC typing (ECDCT) and macrolide resistance. Materials & methods: MLST was performed on genital ulcer and blood samples by analyzing a region of the tp0136, tp0548 and tp0705loci using Sanger sequencing. Results: Up to 59/85 (69.4%) of genital ulcer and 4/39 (10.3%) of whole blood samples were fully typed. The most frequent profiles were 1.3.1 (56%) and 1.1.1 (11%). All the 1.3.1 samples typed carried the A2058G mutation, responsible for macrolide resistance. MLST and ECDCT showed similar overall typing yields. Conclusion: Several allelic profiles of T. pallidum subsp. pallidum were identified and classified into two major genetic clades in Barcelona. Our results were similar to that described in Europe.

Circulation of multi-drug-resistant Shigella sonnei and Shigella flexneri among men who have sex with men in Barcelona, Spain, 2015-2019.

BACKGROUND: In high-income countries, shigellosis is mainly found in travellers to high-risk regions or in men who have sex with men (MSM). This study investigated the genomic characteristics and the features of antimicrobial resistance of MSM-associated Shigella flexneri and Shigella sonnei circulating in Barcelona, Spain, elucidating their connectivity with contemporaneous Shigella spp. from other countries. METHODS: Antimicrobial susceptibility, whole-genome sequencing, genomic characterization and phylogenetic analysis were performed in MSM-associated Shigella spp. recovered from 2015 to 2019. Reference genomes of MSM-associated Shigella spp. were included for contextualization and to determine their connection with international outbreaks. RESULTS: In total, 44 S. flexneri and 26 S. sonnei were identified among MSM. Overall, 80% showed resistance to azithromycin, 65.7% showed resistance to trimethoprim-sulphamethoxazole and 32.8% showed resistance to ciprofloxacin; 27.1% were resistant to all three antimicrobials. mphA and/or ermB, and qnrS and mutations in the quinolone resistance determining regions were found in the azithromycin- and ciprofloxacin-resistant isolates, respectively. Additionally, two isolates carried blaCTX-M-27. Single-nucleotide-polymorphism-based analysis revealed that the isolates were organized into different lineages, most of which were closely related to dominant MSM-associated lineages described previously in the UK and Australia. CONCLUSIONS: This study investigated the circulation of lineages of S. flexneri and S. sonnei among MSM in Spain that were mainly resistant to first-/second-line oral treatments, and closely related to dominant MSM-associated lineages described previously in the UK and Australia. These data reinforce the urgent need for the implementation of public health measures focusing on the early detection and prevention of transmission of this emerging pathogen, which is contributing to the antimicrobial resistance crisis in sexually transmitted infections.

Neisseria gonorrhoeae antimicrobial resistance in Spain: a prospective multicentre study.

OBJECTIVES: Gonococcal infection is one of the most reported sexually transmitted infections and antimicrobial resistance in Neisseria gonorrhoeae (NG) is challenging for the treatment of this infection. This observational study aimed to describe antimicrobial resistance of NG and epidemiological data from patients with gonococcal infection in eight regions of Spain, for updating the local therapeutic guidelines. METHODS: MICs of penicillin, cefixime, ceftriaxone, azithromycin, ciprofloxacin, fosfomycin and gentamicin were determined by Etest for all NG isolates recovered from 1 April 2018 to 30 September 2019 from 10 hospitals in Spain. Resistance determinants were identified using logistic regression analysis. Differences with a P value <0.05 were considered statistically significant. RESULTS: Antimicrobial susceptibility testing was performed for 2571 gonococci isolated from 2429 patients. 44.5% (945/2124) of patients were MSM. The resistance rate to extended-spectrum cephalosporins was low, with 0.2% (6/2561) of isolates resistant to ceftriaxone and 1.7% (44/2517) of isolates resistant to cefixime. The overall azithromycin resistance rate was 12.1% (310/2560), but differed greatly depending on the area. 56.2% (1366/2429) of the strains studied were ciprofloxacin resistant. MIC50 and MIC90 values of gentamicin and fosfomycin were 4 and 8 mg/L and 24 and 48 mg/L, respectively. CONCLUSIONS: Our study shows that NG susceptibility to extended-spectrum cephalosporins remains high in Spain. The azithromycin resistance rate questions the suitability of dual therapy. This study provides data of interest for updating the national treatment guidelines and highlights the need to develop and implement a national sentinel gonococcal antimicrobial susceptibility programme.

Screening for asymptomatic STIs in HIV-infected men who have sex with men.

We aimed to study the prevalence, characteristics and risk factors of asymptomatic sexually transmitted infections (STIs) in HIV-infected men who have sex with men (MSM). We conducted a prospective cross-sectional study, including asymptomatic HIV-infected MSM attending regular visits between December 2014 and December 2017. Of the 301 patients included, 60 patients (19.9%) presented at least one STI. The most common STI was syphilis (33 of 69 STIs), followed by chlamydia (19 of 69), gonorrhoea (10 of 69), hepatitis C virus (4 of 69) and lymphogranuloma venereum (3 of 69). Illicit drug use during sex was the only variable significantly associated with the presence of an STI on multivariate analysis (OR 2.13; 95% CI 1.17-3.89). We were unable to identify a subgroup of patients where we could potentially avoid STI screening. Our findings support current guidelines that recommend routine screening for all HIV-infected MSM regardless of their self-reported sexual history.

Antimicrobial susceptibility of Neisseria gonorrhoeae in Barcelona during a five-year period, 2013 to 2017.

IntroductionIncreasing rates of antimicrobial resistance in Neisseria gonorrhoeae cause problems for treating gonorrhoea.AimThis observational study aimed to describe isolates from all patients found infected with N. gonorrhoeae, in Barcelona, Spain, between 2013 and 2017, and with available antimicrobial susceptibility data.MethodsMinimum inhibitory concentrations (MICs) of penicillin (PEN), cefixime (CFM), ceftriaxone (CRO), azithromycin (AZM), ciprofloxacin (CIP), spectinomycin (SPT), fosfomycin (FOF) and gentamicin (GEN) were determined by E-test. Susceptibility was assessed using clinical breakpoints from the European Committee on Antimicrobial Susceptibility Testing. Time trends for PEN, CFM, AZM and CIP were investigated using logistic regression.ResultsOf 1,979 patients with infection (2,036 isolates), 1,888 (95.4%) were men. Patient median age was 32 years. The proportions of isolates resistant to extended-spectrum cephalosporins were low, with 0.3% (5/1,982) resistant to CRO and 4.9% (98/1,985) to CFM. AZM resistance prevalence was 2.7% (52/1,981), including 16 isolates detected in 2016 and 2017, with high-level resistance. For CIP, 51.3% (1,018/1,986) of isolates were resistant, and for PEN, 20.1% (399/1,985). All isolates were susceptible to SPT. MIC50 and MIC90 values of GEN were 4 and 6 mg/L and of FOF 12 and 24 mg/L, respectively. Between 2013 and 2017, PEN and CFM resistance rates each decreased from 28.1% (92/327) to 12.2% (70/572) and from 8.3% (27/327) to 4.4% (25/572) (p ≤ 0.0073). In contrast, AZM resistance prevalence appeared to increase from 1.5% in 2014 (5/340) to 3.0% (17/572) in 2017. No trend was identified for CIP.ConclusionAntimicrobial susceptibility surveillance is important to timely detect new phenotypes and trends.

Survey of diagnostic resources for STI in Spain. / Encuesta de recursos diagnósticos de las ITS en España.

BACKGROUND: Scarce information is available on the resources to deal with the Sexually Transmitted Infections (STIs), both in the clinic and in the laboratory. The objective is to describe and know the reality of the clinics and laboratories that treat these infections in Spain. METHODS: Cross-sectional observational study with data collection through a survey aimed at the members of the GEITS Group. RESULTS: Responses were obtained from 24 centers (response rate 38.1%) belonging to 10Autonomous Communities. Regarding STI consultations, 38% require that the patient present a health card to provide assistance, and 31.8% only provide it by referral from another doctor. The 52.4% perform diagnostic methods in the care center. Regarding laboratories, 18.2% do not offer immediate response diagnostic tests, although 100% have PCR against Neisseria gonorrhoeae and Chlamydia trachomatis, 47.8% against Mycoplasma genitalium and 65% detect lymphogranuloma venereum genotypes. All laboratories continue to perform culture and gonococcal sensitivity techniques, and 20% perform molecular methods for detection of MG antimicrobial resistance. CONCLUSION: There is great variability in the provision of human and material resources both in the clinics and in the laboratories that attend STIs. In a significant number of centers there are limitations for patient access. Although laboratories have molecular biology technologies, not all of them offer immediate response tests. All laboratories detect N.gonorrhoeae infection by PCR and also by culture, which allows sensitivity testing in all centers.

Mycoplasma genitalium and fluoroquinolone resistance detection using a novel qPCR assay in Barcelona, Spain / Detección de Mycoplasma genitalium y resistencia a fluoroquinolonas empleando una nueva técnica de qPCR en Barcelona, España

No disponible

Clinical evaluation of the ResistancePlus MG FleXible test on the GeneXpert Infinity-48s instrument: a near-patient assay for simultaneous detection of Mycoplasma genitalium and macrolide resistance.

Antibiotic resistance in Mycoplasma genitalium (MG) is rising globally, especially to macrolides. In response to this challenge, assays reporting both the detection of MG and macrolide resistance-mediating mutations (MRMM) allow therapy to be tailored to the individual. The study evaluated the performance of the ResistancePlus® MG FleXible assay for the detection of MG and MRMM. Overall, the test performed well for the detection of MG compared to the AllplexTM STI Essential assay, used as a reference, with a kappa value of 0.926 (95% CI, 0.863-0.990). The kit also performed well for the detection of MRMM when compared with Sanger sequencing of the 23S rRNA gene, with a kappa value of 0.901 (95% CI, 0.807-0.996). The rate of MRMM in MG among the study population was 41.8%. In conclusion, the ResistancePlus® MG FleXible is a rapid, simple, and accurate cartridge-based assay for simultaneous detection of MG and MRMM in clinical settings.

Mycoplasma genitalium macrolide resistance update: Rate among a 2016-2017 cohort of patients in Barcelona, Spain / Actualización en Mycoplasma genitalium y resistencia a macrólidos: tasa en una cohorte de pacientes entre los años 2016-2017 en Barcelona, España

INTRODUCTION: Mycoplasma genitalium is a major cause of urethritis and other genital syndromes. Antibiotic resistance, especially to macrolides, is increasing at an alarming rate worldwide. The aim of this study was to estimate the rate of macrolide resistance in M. genitalium among a 2016-2017 cohort of patients in Barcelona, Spain; and to compare this estimate with previous data from 2013 to 2014 in this region. METHODS: The study was conducted retrospectively with M. genitalium-positive samples collected between December 2016 and February 2017 at the Hospital Vall d'Hebron Microbiology Department. Genotypic markers of macrolide resistance were primarily detected using the ResistancePlus(R) MG molecular assay (SpeeDx). Mutations were then confirmed by sequencing. RESULTS: Macrolide resistance-mediating mutations were detected in 30/83 infections (36.1% [95% CI, 25.9%-47.4%]). This resistance was more frequent among men who have sex with men (55.0% [95% CI, 38.5%-70.7%]) compared to heterosexual men (27.3% [95% CI, 10.7%-50.2%]) and women (9.5% [95% CI, 1.3%-30.4%]), p < 0.001. Additionally, macrolide resistance did not significantly increase in this cohort when compared with previous investigations. CONCLUSION: Despite the current notable rate of macrolide resistance in M. genitalium, resistance did not significantly increase between 2013-2014 and 2016-2017 in our region. Nevertheless, strict local surveillance and the implementation of rapid diagnostic tests that combine the detection of the bacterium and resistance-mediating mutations may facilitate the optimization of antibiotic administration and reduce the transmission of resistance in M. genitalium

INTRODUCCIÓN: Mycoplasma genitalium es causa de uretritis y otras enfermedades genitales. Las resistencias antibióticas, especialmente a macrólidos, están aumentando de forma alarmante a nivel mundial. El objetivo del estudio fue estimar la tasa de resistencia a macrólidos en M. genitalium sobre una cohorte de pacientes entre los años 2016-2017 en Barcelona, España; y comparar esta estimación con datos previos de 2013-2014 en esta región. MÉTODOS: El estudio se realizó de forma retrospectiva sobre muestras positivas para M. genitalium recogidas entre diciembre 2016 y febrero 2017 en el Departamento de Microbiología del Hospital Vall d'Hebron. Los marcadores genotípicos de resistencia a macrólidos se detectaron en primer lugar con el ensayo molecular ResistancePlus(R) MG (SpeeDx). Las mutaciones se confirmaron posteriormente por secuenciación. RESULTADOS: Se detectaron mutaciones asociadas a resistencia a macrólidos en 30/83 (36,1% [IC 95%: 25,9-47,4%]) infecciones. Esta resistencia fue más frecuente en hombres que tienen sexo con hombres (55,0% [IC 95%: 38,5-70,7%]) comparada con la tasa en hombres heterosexuales (27,3% [IC 95%: 10,7-50,2%]) y mujeres (9,5% [IC 95%: 1,3-30,4%]), p < 0,001. Además, la resistencia a macrólidos no aumentó significativamente en esta serie en comparación con investigaciones previas. CONCLUSIÓN: A pesar de la tasa notable de resistencia a macrólidos en M. genitalium, esta no aumentó significativamente entre los años 2013-14 y 2016-17 en nuestro entorno. No obstante, una estricta vigilancia a nivel local junto con la implementación de pruebas diagnósticas rápidas que combinan la detección de la bacteria y las mutaciones de resistencia puede facilitar la optimización de la administración antibiótica y reducir la transmisión de resistencias en M. genitalium

Single-Locus-Sequence-Based Typing of the mgpB Gene Reveals Transmission Dynamics in Mycoplasma genitalium.

Sexually transmitted infections (STIs) by Mycoplasma genitalium are a major problem worldwide, especially given their marked and rapid propensity for developing antimicrobial resistance. Since very few treatment options exist, clinicians face an important challenge in the management of the infection. In this scenario, little is known regarding the transmission dynamics of M. genitalium and the epidemiology of antimicrobial resistance. This mgpB-based molecular typing study, conducted among 54 asymptomatically infected individuals prospectively recruited from an STI screening service, reveals two distinct epidemiological clusters that significantly correlate with sexual conduct in heterosexuals and men who have sex with men (MSM), respectively. This well-defined structuration suggests the presence of two independent sexual networks with little connectivity between them. On the other hand, the study demonstrates the multiclonal feature of the emergence of antibiotic resistance in M. genitalium to both macrolides and fluoroquinolones. The high prevalence of macrolide resistance in M. genitalium among MSM, influenced by dense network connectivity and strong antibiotic selective pressure, may correspond to allodemics affecting other STIs such as gonorrhea, syphilis and enteric pathogens. Collaterally, the structural and functional impact of mutations in the mgpB gene, encoding the major adhesin P140 (MgpB), may require further investigation.