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Ramírez de Arellano E, Saavedra-Lozano J, Villalón P, Jové-Blanco A, Grandioso D, Sotelo J, Gamell A, González-López JJ, Cervantes E, Gónzalez MJ, Rello-Saltor V, Esteva C, Sanz-Santaeufemia F, Yagüe G, Manzanares Á, Brañas P, Ruiz de Gopegui E, Carrasco-Colom J, García F, Cercenado E, Mellado I, Del Castillo E, Pérez-Vazquez M, Oteo-Iglesias J, Calvo C. Clinical, microbiological, and molecular characterization of pediatric invasive infections by Streptococcus pyogenes in Spain in a context of global outbreak. mSphere 2024; 9:e0072923. [PMID: 38440985 DOI: 10.1128/msphere.00729-23] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Accepted: 02/15/2024] [Indexed: 03/06/2024] Open
Abstract
In December 2022, an alert was published in the UK and other European countries reporting an unusual increase in the incidence of Streptococcus pyogenes infections. Our aim was to describe the clinical, microbiological, and molecular characteristics of group A Streptococcus invasive infections (iGAS) in children prospectively recruited in Spain (September 2022-March 2023), and compare invasive strains with strains causing mild infections. One hundred thirty isolates of S. pyogenes causing infection (102 iGAS and 28 mild infections) were included in the microbiological study: emm typing, antimicrobial susceptibility testing, and sequencing for core genome multilocus sequence typing (cgMLST), resistome, and virulome analysis. Clinical data were available from 93 cases and 21 controls. Pneumonia was the most frequent clinical syndrome (41/93; 44.1%), followed by deep tissue abscesses (23/93; 24.7%), and osteoarticular infections (11/93; 11.8%). Forty-six of 93 cases (49.5%) required admission to the pediatric intensive care unit. iGAS isolates mainly belonged to emm1 and emm12; emm12 predominated in 2022 but was surpassed by emm1 in 2023. Spread of M1UK sublineage (28/64 M1 isolates) was communicated for the first time in Spain, but it did not replace the still predominant sublineage M1global (36/64). Furthermore, a difference in emm types compared with the mild cases was observed with predominance of emm1, but also important representativeness of emm12 and emm89 isolates. Pneumonia, the most frequent and severe iGAS diagnosed, was associated with the speA gene, while the ssa superantigen was associated with milder cases. iGAS isolates were mainly susceptible to antimicrobials. cgMLST showed five major clusters: ST28-ST1357/emm1, ST36-ST425/emm12, ST242/emm12.37, ST39/emm4, and ST101-ST1295/emm89 isolates. IMPORTANCE Group A Streptococcus (GAS) is a common bacterial pathogen in the pediatric population. In the last months of 2022, an unusual increase in GAS infections was detected in various countries. Certain strains were overrepresented, although the cause of this raise is not clear. In Spain, a significant increase in mild and severe cases was also observed; this study evaluates the clinical characteristics and the strains involved in both scenarios. Our study showed that the increase in incidence did not correlate with an increase in resistance or with an emm types shift. However, there seemed to be a rise in severity, partly related to a greater rate of pneumonia cases. These findings suggest a general increase in iGAS that highlights the need for surveillance. The introduction of whole genome sequencing in the diagnosis and surveillance of iGAS may improve the understanding of antibiotic resistance, virulence, and clones, facilitating its control and personalized treatment.
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Affiliation(s)
- Eva Ramírez de Arellano
- Laboratorio de Referencia e Investigación en Resistencia a Antibióticos e Infecciones Relacionadas con la Asistencia Sanitaria, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
- CIBER de Enfermedades Infecciosas (CIBERINFEC). Instituto Salud Carlos III, Madrid, Spain
| | - Jesús Saavedra-Lozano
- CIBER de Enfermedades Infecciosas (CIBERINFEC). Instituto Salud Carlos III, Madrid, Spain
- Servicio de Pediatría, Hospital General Universitario Gregorio Marañón. Universidad Complutense, Madrid, Spain
| | - Pilar Villalón
- Laboratorio de Referencia e Investigación en Taxonomía, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
| | - Ana Jové-Blanco
- Servicio de Pediatría, Hospital General Universitario Gregorio Marañón. Universidad Complutense, Madrid, Spain
| | - David Grandioso
- Servicio de Microbiología, Hospital Universitario La Paz, Madrid, Spain
| | - Jared Sotelo
- Laboratorio de Referencia e Investigación en Resistencia a Antibióticos e Infecciones Relacionadas con la Asistencia Sanitaria, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
- CIBER de Enfermedades Infecciosas (CIBERINFEC). Instituto Salud Carlos III, Madrid, Spain
| | - Anna Gamell
- Servicio de Enfermedades Infecciosas, Hospital San Joan de Déu, Barcelona, Spain
| | - Juan José González-López
- CIBER de Enfermedades Infecciosas (CIBERINFEC). Instituto Salud Carlos III, Madrid, Spain
- Servicio de Microbiología, Hospital Universitario Vall d'Hebron, Barcelona, Spain
| | - Eloísa Cervantes
- Servicio de Pediatría, Hospital Virgen de la Arrixaca, Murcia, Spain
| | | | | | - Cristina Esteva
- Servicio de Microbiología, Hospital San Joan de Dèu, Barcelona, Spain
| | | | - Genoveva Yagüe
- Servicio de Microbiología, Hospital Virgen de la Arrixaca, Murcia, Spain
| | | | - Patricia Brañas
- Servicio de Microbiología, Hospital 12 de Octubre, Madrid, Spain
| | - Enrique Ruiz de Gopegui
- CIBER de Enfermedades Infecciosas (CIBERINFEC). Instituto Salud Carlos III, Madrid, Spain
- Servicio de Microbiología, Hospital Universitario Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdiSBA), Palma, Spain
| | | | - Federico García
- CIBER de Enfermedades Infecciosas (CIBERINFEC). Instituto Salud Carlos III, Madrid, Spain
- Servicio de Microbiología, Hospital San Cecilio, Instituto de Investigación IbS.GRANADA, Granada, Spain
| | - Emilia Cercenado
- Servicio de Microbiología Clínica y Enfermedades Infecciosas, Hospital Universitario Gregorio Marañón, Madrid, Spain
- CIBER de Enfermedades Respiratorias (CIBERES). Instituto Salud Carlos III, Madrid, Spain
| | - Isabel Mellado
- Servicio de Pediatría y Enfermedades Infecciosas, Hospital Universitario La Paz, Fundación IdiPaz Madrid, Spain. Red de Investigación Traslación en Infectología Pediátrica (RITIP), Universidad Autónoma de Madrid, Madrid, Spain
| | - Elena Del Castillo
- Servicio de Pediatría. Hospital Materno Infantil de Badajoz, Badajoz, Spain
| | - María Pérez-Vazquez
- Laboratorio de Referencia e Investigación en Resistencia a Antibióticos e Infecciones Relacionadas con la Asistencia Sanitaria, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
- CIBER de Enfermedades Infecciosas (CIBERINFEC). Instituto Salud Carlos III, Madrid, Spain
| | - Jesús Oteo-Iglesias
- Laboratorio de Referencia e Investigación en Resistencia a Antibióticos e Infecciones Relacionadas con la Asistencia Sanitaria, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
- CIBER de Enfermedades Infecciosas (CIBERINFEC). Instituto Salud Carlos III, Madrid, Spain
| | - Cristina Calvo
- CIBER de Enfermedades Infecciosas (CIBERINFEC). Instituto Salud Carlos III, Madrid, Spain
- Servicio de Pediatría y Enfermedades Infecciosas, Hospital Universitario La Paz, Fundación IdiPaz Madrid, Spain. Red de Investigación Traslación en Infectología Pediátrica (RITIP), Universidad Autónoma de Madrid, Madrid, Spain
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Fernández P, Moreno L, Yagüe G, Andreu E, Jara R, Segovia M. Colonization by multidrug-resistant microorganisms in ICU patients during the COVID-19 pandemic. Med Intensiva 2021; 45:313-315. [PMID: 34059221 PMCID: PMC8086975 DOI: 10.1016/j.medine.2021.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 02/14/2021] [Indexed: 11/02/2022]
Affiliation(s)
- P Fernández
- Servicio de Microbiología y Parasitología, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain.
| | - L Moreno
- Servicio de Microbiología y Parasitología, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - G Yagüe
- Servicio de Microbiología y Parasitología, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Departamento de Genética y Microbiología, Universidad de Murcia, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain
| | - E Andreu
- Unidad de Medicina Intensiva, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - R Jara
- Unidad de Medicina Intensiva, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - M Segovia
- Servicio de Microbiología y Parasitología, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Departamento de Genética y Microbiología, Universidad de Murcia, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain
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3
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Fernández P, Moreno L, Yagüe G, Andreu E, Jara R, Segovia M. [Colonization by multidrug-resistant microorganisms in ICU patients during the COVID-19 pandemic]. Med Intensiva 2021; 45:313-315. [PMID: 34054174 PMCID: PMC7945882 DOI: 10.1016/j.medin.2021.02.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/07/2021] [Accepted: 02/14/2021] [Indexed: 11/30/2022]
Affiliation(s)
- P Fernández
- Servicio de Microbiología y Parasitología, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, España
| | - L Moreno
- Servicio de Microbiología y Parasitología, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, España
| | - G Yagüe
- Servicio de Microbiología y Parasitología, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, España.,Departamento de Genética y Microbiología, Universidad de Murcia, Murcia, España.,Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, España
| | - E Andreu
- Unidad de Medicina Intensiva, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, España
| | - R Jara
- Unidad de Medicina Intensiva, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, España
| | - M Segovia
- Servicio de Microbiología y Parasitología, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, España.,Departamento de Genética y Microbiología, Universidad de Murcia, Murcia, España.,Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, España
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Alonso-Monge R, Guirao-Abad JP, Sánchez-Fresneda R, Pla J, Yagüe G, Argüelles JC. The Fungicidal Action of Micafungin is Independent on Both Oxidative Stress Generation and HOG Pathway Signaling in Candida albicans. Microorganisms 2020; 8:microorganisms8121867. [PMID: 33256159 PMCID: PMC7768384 DOI: 10.3390/microorganisms8121867] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 11/23/2020] [Accepted: 11/25/2020] [Indexed: 01/10/2023] Open
Abstract
In fungi, the Mitogen-Activated Protein kinase (MAPK) pathways sense a wide variety of environmental stimuli, leading to cell adaptation and survival. The HOG pathway plays an essential role in the pathobiology of Candida albicans, including the colonization of the gastrointestinal tract in a mouse model, virulence, and response to stress. Here, we examined the role of Hog1 in the C. albicans response to the clinically relevant antifungal Micafungin (MF), whose minimum inhibitory concentration (MIC) was identical in the parental strain (RM100) and in the isogenic homozygous mutant hog1 (0.016 mg/L). The cell viability was impaired without significant differences between the parental strain, the isogenic hog1 mutant, and the Hog1+ reintegrant. This phenotype was quite similar in a collection of hog1 mutants constructed in a different C. albicans background. MF-treated cells failed to induce a relevant increase of both reactive oxygen species (ROS) formation and activation of the mitochondrial membrane potential in parental and hog1 cells. MF was also unable to trigger any significant activation of the genes coding for the antioxidant activities catalase (CAT1) and superoxide dismutase (SOD2), as well as on the corresponding enzymatic activities, whereas a clear induction was observed in the presence of Amphotericin B (AMB), introduced as a positive control of Hog1 signaling. Furthermore, Hog1 was not phosphorylated by the addition of MF, but, notably, this echinocandin caused Mkc1 phosphorylation. Our results strongly suggest that the toxic effect of MF on C. albicans cells is not mediated by the Hog1 MAPK and is independent of the generation of an internal oxidative stress in C. albicans.
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Affiliation(s)
- Rebeca Alonso-Monge
- Departamento de Microbiología y Parasitología-IRYCIS, Unidad de Microbiología, Facultad de Farmacia, Universidad Complutense de Madrid, E-28040 Madrid, Spain; (J.P.G.-A.); (J.P.)
- Correspondence: (R.A.-M.); (J.C.A.); Tel.: +34-91-3941888 (R.A.-M.); +34-868-887131 (J.C.A.); Fax: +34-91-3941745 (R.A.-M.); Phone: Fax: +34-868-993963 (J.C.A.)
| | - José P. Guirao-Abad
- Departamento de Microbiología y Parasitología-IRYCIS, Unidad de Microbiología, Facultad de Farmacia, Universidad Complutense de Madrid, E-28040 Madrid, Spain; (J.P.G.-A.); (J.P.)
- Área de Microbiología, Facultad de Biología, Universidad de Murcia, E-30071 Murcia, Spain;
| | - Ruth Sánchez-Fresneda
- Área de Microbiología, Facultad de Biología, Universidad de Murcia, E-30071 Murcia, Spain;
| | - Jesús Pla
- Departamento de Microbiología y Parasitología-IRYCIS, Unidad de Microbiología, Facultad de Farmacia, Universidad Complutense de Madrid, E-28040 Madrid, Spain; (J.P.G.-A.); (J.P.)
| | - Genoveva Yagüe
- Servicio de Microbiología Clínica, Hospital Universitario Virgen de la Arrixaca, IMIB, 30120 Murcia, Spain;
| | - Juan Carlos Argüelles
- Área de Microbiología, Facultad de Biología, Universidad de Murcia, E-30071 Murcia, Spain;
- Correspondence: (R.A.-M.); (J.C.A.); Tel.: +34-91-3941888 (R.A.-M.); +34-868-887131 (J.C.A.); Fax: +34-91-3941745 (R.A.-M.); Phone: Fax: +34-868-993963 (J.C.A.)
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Guirao-Abad JP, Pujante V, Sánchez-Fresneda R, Yagüe G, Argüelles JC. Sensitivity of the Candida albicans trehalose-deficient mutants tps1Δ and tps2Δ to amphotericin B and micafungin. J Med Microbiol 2019; 68:1479-1488. [DOI: 10.1099/jmm.0.001053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
| | - Vanessa Pujante
- Área de Microbiología, Facultad de Biología, Universidad de Murcia, E-30100, Spain
| | | | - Genoveva Yagüe
- Servicio de Microbiología Clínica, Hospital Universitario Virgen de la Arrixaca, IMIB, Murcia, Spain
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del Barrio-Tofiño E, Sánchez-Diener I, Zamorano L, Cortes-Lara S, López-Causapé C, Cabot G, Bou G, Martínez-Martínez L, Oliver A, Galán F, Gracia I, Rodríguez MA, Martín L, Sánchez JM, Viñuela L, García MV, Lepe JA, Aznar J, López-Hernández I, Seral C, Castillo-García FJ, López-Calleja AI, Aspiroz C, de la Iglesia P, Ramón S, Riera E, Pérez MC, Gallegos C, Calvo J, Quesada MD, Marco F, Hoyos Y, Horcajada JP, Larrosa N, González JJ, Tubau F, Capilla S, Pérez-Moreno MO, Centelles MJ, Padilla E, Rivera A, Mirelis B, Rodríguez-Tarazona RE, Arenal-Andrés N, del Pilar Ortega M, Megías G, García I, Colmenarejo C, González JC, Martínez NM, Gomila B, Giner S, Tormo N, Garduño E, Agulla JA, Seoane A, Pita J, Vidal IP, Guzmán DM, García M, Pérez del Molino ML, Barbeito G, Artiles F, Azcona-Gutiérrez JM, Sáenz Y, Oteo JA, González A, Villa J, Chaves F, Cercenado E, Alarcón T, Zurita ND, Merino I, Morosini MI, Cantón R, Sánchez MI, Moreno L, Yagüe G, Leiva J, Barrios JL, Canut A, Oteo J. Association between Pseudomonas aeruginosa O-antigen serotypes, resistance profiles and high-risk clones: results from a Spanish nationwide survey. J Antimicrob Chemother 2019; 74:3217-3220. [DOI: 10.1093/jac/dkz346] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/08/2019] [Accepted: 07/10/2019] [Indexed: 01/08/2023] Open
Abstract
Abstract
Objectives
To evaluate the correlation of O-antigen serotypes with resistance profiles and high-risk clones in a Spanish nationwide survey.
Methods
Up to 30 consecutive healthcare-associated Pseudomonas aeruginosa isolates were collected during October 2017 from each of 51 hospitals (covering all Spanish regions) with a total of 1445 isolates studied. MICs of 13 antipseudomonal agents and MDR/XDR profiles had been previously determined, as well as whole-genome sequences of 185 representative XDR isolates. O-antigen serotypes (O1–O16) were determined by agglutination using serotype-specific antisera (BioRad). The Pseudomonas aeruginosa serotyper (PAst) program was used for in silico serotyping.
Results
The most frequent serotypes were O6 (17.8%), O1 (15.4%) and O11 (13.3%). In contrast, the most frequent serotype among XDR isolates (17.3%) was O4 (34.1%), distantly followed by O11 (15.9%). Within serotypes, XDR phenotypes were more frequent for O12 (60.0%) and O4 (57.3%). The most frequent clone among the XDR isolates was ST175 (40.9%), followed by CC235 (10.7%), ST308 (5.2%) and CC111 (3.6%). Up to 81.6% of XDR ST175 isolates typed O4, whereas 18.4% were non-typeable. O4 genotype was detected in all sequenced (n=55) ST175 isolates. On the other hand, CC235 and ST308 were associated with O11, whereas CC111 was linked to serotype O12.
Conclusions
O4 serotype is linked to the MDR/XDR profile of widespread ST175 (typically only susceptible to colistin, amikacin and the novel combinations ceftolozane/tazobactam and ceftazidime/avibactam) and therefore, after local validation, its detection in the microbiology laboratory might be useful for guiding semi-empirical antipseudomonal therapies and infection control measures in Spanish hospitals.
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Affiliation(s)
- Ester del Barrio-Tofiño
- Servicio de Microbiología, Hospital Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdISBa), Palma de Mallorca, España
| | - Irina Sánchez-Diener
- Servicio de Microbiología, Hospital Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdISBa), Palma de Mallorca, España
| | - Laura Zamorano
- Servicio de Microbiología, Hospital Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdISBa), Palma de Mallorca, España
| | - Sara Cortes-Lara
- Servicio de Microbiología, Hospital Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdISBa), Palma de Mallorca, España
| | - Carla López-Causapé
- Servicio de Microbiología, Hospital Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdISBa), Palma de Mallorca, España
| | - Gabriel Cabot
- Servicio de Microbiología, Hospital Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdISBa), Palma de Mallorca, España
| | - Germán Bou
- Servicio de Microbiología, Hospital Universitario La Coruña, Instituto Investigación Biomédica A Coruña (INIBIC), A Coruña, España
| | - Luis Martínez-Martínez
- Unidad de Gestión Clínica de Microbiología, Hospital Reina Sofía, Departamento de Microbiología, Universidad de Córdoba, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, España
| | - Antonio Oliver
- Servicio de Microbiología, Hospital Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdISBa), Palma de Mallorca, España
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Hernández A, Yagüe G, Vázquez EG, Simón M, Parrado LM, Canteras M, Gómez J. [Nosocomial infections caused by multiresistant Pseudomonas aeruginosa (carbapenems included): predictive and prognostic factors. A prospective study (2016-2017))]. Rev Esp Quimioter 2018; 31:123-130. [PMID: 29564870 PMCID: PMC6159385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Pseudomonas aeruginosa is one of the major pathogens causing hospital-acquired infections. In recent years, antimicrobial resistance is increasing and multidrug resistant (MDR) and extremely drug resistant (XDR) isolates have been associated with an increase of mortality. The aim of this study is to assess the clinical significance and analyze predictors and prognostic factors. METHODS Prospective case-control non-paired study involving 64 patients with P. aeruginosa nosocomial infection, 32 caused by susceptible P. aeruginosa and 32 by MDR/XDR including to carbapenems (XDR-C) strains, admitted at a third level hospital. The follow-up period was till hospital discharge or death and at 30 days after discharge. For all patients, clinical epidemiology and microbiological data were analyzed. RESULTS The incidence of MDR/XDR-C strains was 2.3 per 1000 admissions. Ten of which were VIM metallo-β-lactamase-producing. Independent predictor factors associated with MDR/XDR-C infections were: previous ICU or Resuscitation unit admission (OR 14.01; IC 95% 2.105-93.297) appearance >20 days after admission (OR 29.826; IC 95% 4.783-185.997) and leukocytosis (OR 10.0190; IC 95% 1.842-56.369). However, there were not statistically significant differences in clinical severity or mortality between both groups. CONCLUSIONS The major risk factors associated with MDR/XDR-C infections were previous ICU or Resuscitation unit admission, appearance >20 days after admission and leukocytosis. MDR/XDR-C infections were not associated to increased mortality.
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Albert M, Yagüe G, Fernández M, Viñuela L, Segovia M, Muñoz JL. Prevalence of plasmid-mediated quinolone resistance determinants in extended-spectrum β-lactamase-producing and -non-producing enterobacteria in Spain. Int J Antimicrob Agents 2014; 43:390-1. [PMID: 24631491 DOI: 10.1016/j.ijantimicag.2014.01.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 01/24/2014] [Accepted: 01/28/2014] [Indexed: 11/25/2022]
Affiliation(s)
- M Albert
- Department of Microbiology, Hospital Universitario Virgen de la Arrixaca, University of Murcia, Madrid - Cartagena Road, s/n 30120, El Palmar, Murcia, Spain.
| | - G Yagüe
- Department of Microbiology, Hospital Universitario Virgen de la Arrixaca, University of Murcia, Madrid - Cartagena Road, s/n 30120, El Palmar, Murcia, Spain.
| | - M Fernández
- Department of Microbiology, Complejo Hospitalario de León, León, Spain
| | - L Viñuela
- Department of Microbiology, Hospital Universitario de Salamanca, University of Salamanca, Salamanca, Spain
| | - M Segovia
- Department of Microbiology, Hospital Universitario Virgen de la Arrixaca, University of Murcia, Madrid - Cartagena Road, s/n 30120, El Palmar, Murcia, Spain
| | - J L Muñoz
- Department of Microbiology, Hospital Universitario de Salamanca, University of Salamanca, Salamanca, Spain; Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
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García-Vázquez E, Albendín H, Hernández-Torres A, Canteras M, Yagüe G, Ruiz J, Gómez J. [Study of a cohort of patients with Enterococcus spp. Bacteraemia. Risk factors associated to high-level resistance to aminoglycosides]. Rev Esp Quimioter 2013; 26:203-213. [PMID: 24080886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVES To analyze a cohort of patients with Enterococcus sp. bacteraemia. PATIENTS AND METHODS Retrospective and observational study of a cohort of non-pediatric in-patients with Enterococcus spp. bacteraemia (June 2007-September 2009). Data collection from clinical records was done according to a standard protocol. We analyzed epidemiological, clinical and microbiological data. Treatment with glycopeptides in non allergic patients or in case of betalactam susceptibility (ampicillin) was considered "optimizable". RESULTS Three were 106 cases of bacteraemia (2.2/1000 admitted patients; 84% E. faecalis); 83% had an underlying condition; 88% nosocomial or health related cases. Urinary infection was present in 20% and primary bacteraemia in 47%. High level resistance to gentamicin (HLRG) was present in 60%; there was no vancomycin or linezolid resistance. Most frequent empiric treatments were penicillin-betalactamase inhibitor (25%) and glycopeptides (22%). Most frequent definitive treatment was glycopeptides (34%), being "optimized" 21% and 44% of empiric and definitive treatments, respectively. Mortality was 23% (related, 14%). In the multivariate analysis, risk factors associated with HLRG were nosocomial acquired infection (OR 6.083; 95CI% 1.428-25.915) and no-abdominal origin (OR 6.006; 95CI%1.398-25.805). In multivariate analysis, independent risk factors for mortality were: Pitt > 3 (OR 14.405; 95CI%2.236-92.808) and active empiric treatment (OR 8.849; 95CI% 1.101-71.429). Incidence in previous cohort was similar but HLRG rate has increased. CONCLUSIONS Risk factors associated with HLRG were nosocomial acquired infection and no-abdominal origin. Risk factors for mortality were initial clinical severity and having received active empiric treatment. HLRG rate has increased.
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Affiliation(s)
- Elisa García-Vázquez
- Elisa García-Vázquez, Servicio Medicina Interna-Infecciosas. Hospital Universitario Virgen de la Arrixaca. Murcia, Ctra. Madrid-Cartagena. 30120 El Palmar (Murcia), Spain.
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10
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Hernández-Torres A, García-Vázquez E, Gómez J, Canteras M, Ruiz J, Yagüe G. Multidrug and carbapenem-resistant Acinetobacter baumannii infections: Factors associated with mortality. Med Clin (Barc) 2011; 138:650-5. [PMID: 22093403 DOI: 10.1016/j.medcli.2011.06.024] [Citation(s) in RCA: 26] [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: 03/24/2011] [Revised: 06/28/2011] [Accepted: 06/30/2011] [Indexed: 11/17/2022]
Abstract
BACKGROUND AND OBJECTIVE To analyse factors related to mortality and influence of antibiotic treatment on outcome in patients with nosocomial infection due to multidrug and carbapenem-resistant Acinetobacter baumannii (MDR-C AB). PATIENTS AND METHODS Observational and prospective study of a cohort of adult patients with MDR-C AB infection. Data collection from clinical records was done according to a standard protocol (January 2007 through June 2008). Patients with MDR-C AB infection were identified by review of results of microbiology cultures from the hospital microbiology laboratory. Epidemiological and clinical variables and predictors of mortality were analysed. RESULTS 24 out of 101 cases were considered colonizations and 77 infections (27 bacteraemia); global mortality in infected patients was 49% (18 cases with bacteraemia and 20 with no bacteraemia). In the multivariate analysis, including the 77 cases of infection, the prognosis factors associated with mortality were age (OR 1.09; 95% CI 1.02-1.2), McCabe 1 (OR 33.98; 95% CI 4.33-266.85), bacteraemia (OR 9.89; 95% CI 1.13-86.13), inadequate empiric treatment (OR 16.7; 95% CI 2.15-129.79), and inadequate definitive treatment (OR 26.29; 95% CI 1.45-478.19). In the multivariate analysis including the 57 cases of infection with adequate definitive treatment, the prognosis factors associated with mortality were McCabe 1 (OR 24.08; 95% CI 3.67-157.96) and monotherapy versus combined treatment (OR 7.11; 95% CI 1.63-30.99). CONCLUSIONS Our cohort of patients with MDR-C AB infection is characterised by a very high mortality (49%); the severity of patients and inadequate treatment or monotherapy are statistically associated with mortality.
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Affiliation(s)
- Alicia Hernández-Torres
- Services of Internal Medicine-Infectious Diseases, University Hospital Virgen de la Arrixaca, Spain.
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11
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Munoz-Dávila MJ, Yagüe G, Albert M, García-Lucas T. Comparative evaluation of Vitek 2 identification and susceptibility testing of Gram-negative rods directly and isolated from BacT/ALERT-positive blood culture bottles. Eur J Clin Microbiol Infect Dis 2011; 31:663-9. [PMID: 21796342 DOI: 10.1007/s10096-011-1356-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [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: 05/03/2011] [Accepted: 07/07/2011] [Indexed: 11/25/2022]
Abstract
The performance of Vitek 2 was evaluated for the identification and susceptibility testing of Gram-negative bacilli directly from positive blood cultures bottles. Direct inoculation of the positive blood cultures with the Vitek cards ID-GN and AST-NO58 was compared with the standard inoculation method based on the sub-culture of the positive blood culture to agar. A total of 142 blood cultures were included in the study; of those, 119 were from patients' clinical samples, while 23 were artificially prepared with strains showing different mechanisms of resistance. A total of 136 (95.8%) strains were correctly identified to the species level, only 2 (1.4%) were mis-identified and 4 (2.8%) were not identified. Susceptibility results were available for all isolates tested against 17 antibiotics, thus, resulting in a total of 2,414 isolate/anti-microbial combinations. The error rate was 2.8% (67/2,414) overall; 0.6% (14/2,414) very major errors, 0.1% (3/2,414) major errors and 2.1% (50/2,414) minor errors. The direct method detected 88.5% (22/25) of the strains producing extended-spectrum beta-lactamases (ESBLs). The susceptibility agreement among the added strains with ESBL, AMPc hyperproduction, resistance to ceftazidime, carbapenems and cefepime was very high. Direct identification and susceptibility testing gave rapid and reliable results, reducing by 24 h the turnaround time of the microbiology laboratory.
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Affiliation(s)
- M J Munoz-Dávila
- Microbiology Service, University Hospital Virgen de la Arrixaca, El Palmar, Murcia, Spain
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12
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García-Hernández AM, García-Vázquez E, Hernández-Torres A, Ruiz J, Yagüe G, Herrero JA, Gómez J. [Bacteraemia due to Escherichia coli producing extended-spectrum beta-lactamases (ESBL): clinical relevance and today's insights]. Rev Esp Quimioter 2011; 24:57-66. [PMID: 21666996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Antibiotic resistance is an old problem with new face as the rate of infections due to multidrug resistant bacteria is higher everyday and the number of new antibiotics to overwhelm the problem is becoming smaller. E. coli is the most frequent agent causing nosocomial or community-acquired bacteraemia being in our country 10% of them extended-spectrum beta-lactamases (ESBL) producing E. coli isolates. Nowadays the number of community- acquired or health-related infections caused by these ESBL producing E. coli is increasing. CTX-M has also become the most frequent ESBL compared to other enzymes. The role of these enzymes as a virulence factor increasing mortality in patients with bacteraemia due to E. coli is not well defined. The relevance of ESBL-E. coli seems to be related with the higher frequency of inadequate treatment and therefore the importance of identifying factors or features that might predict that the patient's infection is due to one of these isolates. In terms of prevention and control of infection measures, the role of patient's isolation is not clear but a proper prescription of antibiotics and antibiotic control policies are probably important to reduce the problem.
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13
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Torres HA, Vázquez EG, Yagüe G, Gómez JG. [Multidrug resistant Acinetobacter baumanii:clinical update and new highlights]. Rev Esp Quimioter 2010; 23:12-19. [PMID: 20232019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The role of multidrug resistant Acinetobacter baumanii and its clinical relevance have been recently appreciated as a ubiquitous opportunistic nosocomial pathogen. Risk factors associated with A. baumanii infection include severe underlying diseases, previous surgery, invasive procedures, treatment with broad-spectrum antibiotics, length of hospital stay, admission to intensive care units (ICU). Carbapenem-multidrug resistant A. baumanii infections are probably associated to greater severity and more complications; in our cohort mortality was 49.3% and related mortality (within 72 hours) was 10.39%. However, severe underlying diseases probably play an important role in the clinical outcome of patients with MDR-C A. baumanii infection and controversy exists regarding the real mortality attributable to antimicrobial resistance because a high proportion of deaths took place > 7 days after diagnosis. Nevertheless, in our experience, carbapenem resistance, inappropriate therapy and monotherapy are associated to a higher mortality. Special attention should be paid to design well-controlled prospective clinical trials to determine the optimal antimicrobial therapy in critically ill patients suspected of having MDR Acinetobacter infection.
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Affiliation(s)
- Hernández A Torres
- Servicio de MI Infecciosas. Hospital Universitario, Virgen de la Arrixaca. Murcia, Spain.
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14
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Muñoz MJ, Martínez Toldos MC, Yagüe G, Segovia M. Evaluation of three immunochromatographic assays for detection of Legionella pneumophila serogroup 1 antigen in urine samples. Rev Esp Quimioter 2009; 22:207-209. [PMID: 20082041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The Uni-Gold, the SAS and the Binax NOW immunochromatographic test (ICT) urinary antigen assays for the qualitative detection of Legionella pneumophila serogroup 1 were compared using 39 unfrozen and nonconcentrated urine samples from patients with Legionnaires disease (LD). The Uni-Gold antigen test detected the urinary antigen in 41% (16/39), the SAS antigen test in 61.5% (24/39), and the Binax NOW antigen test in 74.3% (29/39). The Binax NOW ICT assay showed the best results when detecting L. pneumophila urinary antigen.
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Affiliation(s)
- M J Muñoz
- Microbiology Service, Hospital Virgen de la Arrixaca, 30120 El Palmar, Murcia, Spain.
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15
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16
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Ortiz G, Yagüe G, Segovia M, Catalán V. A study of air microbe levels in different areas of a hospital. Curr Microbiol 2009; 59:53-8. [PMID: 19330376 DOI: 10.1007/s00284-009-9398-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2008] [Revised: 02/21/2009] [Accepted: 02/23/2009] [Indexed: 11/28/2022]
Abstract
Airborne transmission is an important route for many microbial pathogens in outdoor and indoor environments, including hospitals. A 2-year-long survey of bioaerosol quality in operating theatres (OT), hospital rooms (HR) and maternity wards (MW) at a hospital in Murcia, Spain, was performed. Total aerobic counts (TAC) and fungal load (FL) were assessed using a microbiological air sampler (MAS-100 single-stage impactor). While fungal levels were below 1 cfu/m(3) (0-7.33 cfu/m(3)) in OT, they were higher in MW (mean, 6.9 cfu/m(3); range 0.44-44.67 cfu/m(3)) and in HR (mean, 10.6 cfu/m(3); range, 0-266 cfu/m(3)). In OT the aerobic counts were considerably higher, with a mean of 25.6 cfu/m(3) (range, 1.67-157 cfu/m(3)). MW and HR also showed higher means for total aerobic counts compared to OT. Seasonal changes were not detected in mould and bacteria levels in OT. Hospital renovation occurred during this study and OT adjacent to renovated areas were closed. A survey of TAC and FL in OT resumed when renovation was completed. We observed an outstanding increase in FL (more than 100 cfu/m(3)), particularly Aspergillus spp., during this period, but no significant changes in TAC were observed after renovation.
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17
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Parra MI, Martinez MC, Remacha MA, Saéz-Nieto JA, Garcia E, Yagüe G, Guardiola J. Pneumonia due to Nocardia cyriacigeorgica in a patient with Crohn's disease treated with infliximab. J Crohns Colitis 2008; 2:331-2. [PMID: 21172233 DOI: 10.1016/j.crohns.2008.05.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2008] [Accepted: 05/06/2008] [Indexed: 01/25/2023]
Abstract
Infliximab, an anti-tumor necrosis factor α (TNF-α) antibody, is useful in the treatment of rheumatoid arthritis, Crohn's disease etc. It has been related to increases in the rate of several infections. We present the case of a 53-year-old woman diagnosed with community-acquired pneumonia due to Nocardia cyriacigeorgica who was taking infliximab, azathioprine and prednisone for Crohn's disease.
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Affiliation(s)
- M I Parra
- Departments of Respiratory Medicine, Hospital Universitario Virgen de la Arrixaca. Murcia, Spain
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18
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Yagüe G, Goyache F, Becerra J, Moreno C, Sánchez L, Altarriba J. Bayesian estimates of genetic parameters for pre-conception traits, gestation length and calving interval in beef cattle. Anim Reprod Sci 2008; 114:72-80. [PMID: 18990517 DOI: 10.1016/j.anireprosci.2008.09.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2007] [Revised: 09/09/2008] [Accepted: 09/23/2008] [Indexed: 10/21/2022]
Abstract
A total of 5253 records obtained from 2081 Rubia Gallega beef cows managed using artificial insemination as the only reproduction system were analysed to estimate genetic parameters for days to first insemination (DFI), days from first insemination to conception (FIC), number of inseminations per conception (IN), days open (DO), gestation length (GL) and calving interval (CI) via multitrait Bayesian procedures. Estimates of the mean of posterior distribution of the heritability of DFI, FIC, IN, DO, GL and CI were, respectively, 0.050, 0.078, 0.071, 0.053, 0.037 and 0.085 and the corresponding estimates for repeatability of these traits were 0.116, 0.129, 0.147, 0.138, 0.082 and 0.132, respectively. No significant genetic correlations associated to DFI or GL were found. However, genetic correlations between the other four analysed traits were high and significant. Genetic correlations between FIC and IN, DO and CI were similar and higher than 0.85. Genetic correlations of IN-DO and IN-CI were over 0.65. The highest genetic correlation was estimated for the pair DO-CI (0.992) that can be considered the same trait in genetic terms. Results indicated that DFI can be highly affected by non-genetic factors thus limiting its usefulness to be used as an earlier indicator of reproductive performance in beef cattle. Moreover, GL could not be associated to the reproductive performance of the cow before conception. The other four analysed traits, FIC, IN, DO and CI, have close genetic relationships. The inclusion of IN as an earlier indicator of fertility in beef cattle improvement programs using artificial insemination as the main reproductive system can be advisable due to the low additional recording effort needed.
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Affiliation(s)
- G Yagüe
- Unidad de Genética cuantitativa y Mejora animal, Facultad de Veterinaria, Universidad de Zaragoza, C. Miguel Servet, 177, E-50013 Zaragoza, Spain
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19
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Valero-Guillén PL, Yagüe G, Segovia M. Characterization of acyl-phosphatidylinositol from the opportunistic pathogen Corynebacterium amycolatum. Chem Phys Lipids 2005; 133:17-26. [PMID: 15589223 DOI: 10.1016/j.chemphyslip.2004.08.001] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2004] [Revised: 07/20/2004] [Accepted: 08/23/2004] [Indexed: 11/27/2022]
Abstract
The aim of the present study was to characterize a new lipid detected in the opportunistic pathogen Corynebacterium amycolatum. It was identified as acyl-phosphatidylinositol (acyl-PI), and revealed as a mixture of homologues compounds by electrospray ionization mass spectrometry, with pseudomolecular ions, (M-H)-, observed at 1099 (the major one) 1113, and 1127. Acyl-PI exclusively contained octadecenoyl on the inositol moiety (as 3-O-acyl), an unsaturated fatty acyl (mostly octadecenoyl) at sn-1 position of the glycerol and a saturated fatty acyl (mainly hexadecanoyl) at the sn-2 position. Acyl-PI constitutes a new natural substance and seems to be unique among the phospholipids of C. amycolatum. Other more complex molecules, previously undetected, and assigned in this work to several acyl forms of phosphatidylinositol trimannosides, lacked octadecenoyl in their polar heads. The present study reveals the existence of acyl-PI in C. amycolatum as rather unexpected finding and, additionally, gives evidence for the ability of this species to synthesize a great variety of inositol-containing phospholipids.
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Affiliation(s)
- Pedro L Valero-Guillén
- Departamento de Genética y Microbiología, Facultad de Medicina, Universidad de Murcia, Campus Universitario de Espinardo, Apartado 4021, 30100 Murcia, Spain.
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20
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Altarriba J, Varona L, Moreno C, Yagüe G, Sañudo C. Consequences of selection for growth on carcass and meat quality in Pirenaica cattle. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.livprodsci.2004.12.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Guerrero C, Toldos CM, Yagüe G, Ramírez C, Rodríguez T, Segovia M. Comparison of diagnostic sensitivities of three assays (Bartels enzyme immunoassay [EIA], Biotest EIA, and Binax NOW immunochromatographic test) for detection of Legionella pneumophila serogroup 1 antigen in urine. J Clin Microbiol 2004; 42:467-8. [PMID: 14715807 PMCID: PMC321653 DOI: 10.1128/jcm.42.1.467-468.2004] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Bartels enzyme immunoassay (EIA), Biotest EIA, and Binax NOW immunochromatographic test (ICT) urinary antigen kits for the detection of Legionella pneumophila serogroup 1 were compared using 178 frozen urine samples. When nonconcentrated urine samples were used, the sensitivity levels of both enzyme EIAs were significantly higher than the sensitivity level of the ICT (Bartels EIA, 71.3%; Biotest EIA, 65.1%; Binax NOW ICT, 37% [P < 0.001]). After concentration of the urine samples, no significant differences in sensitivity were found among the three tests.
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Affiliation(s)
- Carmen Guerrero
- Servicio de Microbiología, Hospital "J M Morales Meseguer," 30008 Murcia, Spain
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22
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Yagüe G, Segovia M, Valero-Guillén PL. Phospholipid composition of several clinically relevant Corynebacterium species as determined by mass spectrometry: an unusual fatty acyl moiety is present in inositol-containing phospholipids of Corynebacterium urealyticum. Microbiology (Reading) 2003; 149:1675-1685. [PMID: 12855719 DOI: 10.1099/mic.0.26206-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A comparative study on phospholipids of Corynebacterium amycolatum, Corynebacterium jeikeium and Corynebacterium urealyticum was carried out using fast-atom bombardment (FAB) and electrospray ionization (ESI) mass spectrometry. Data obtained indicate the presence of acylphosphatidylglycerol (APG), diphosphatidylglycerol, phosphatidylglycerol (PG), phosphatidylinositol (PI) and triacylphosphatidylinositol dimannosides (Ac(3)PIM(2)) in these bacteria. In general, octadecenoyl and hexadecanoyl fatty acyl moieties predominated in phospholipids of C. amycolatum, whereas high levels of hexadecenoyl were found in C. jeikeium and C. urealyticum. Mass spectra from purified APG and PG indicated that the sn-1 position of the glycerol was occupied by octadecenoyl in the three species studied. Notably, several major molecular species of PI and Ac(3)PIM(2) from C. urealyticum contained significant amounts of a moiety identified as 10-methyleneoctadecanoyl, located at the sn-1 position of these molecules. On the other hand, multiantibiotic resistant and susceptible strains of C. amycolatum differed in several minor phospholipid fatty acids of 19 carbon atoms, identified as 10-methyloctadecenoic, 10-methyloctadecanoic (tuberculostearic acid) and 10-methyleneoctadecanoic. The results demonstrate an overall similarity among the phospholipids of the different species studied but also significant differences related to the acyl chains of the glycerol moiety of these compounds, notably the high levels of an unusual fatty acyl moiety in inositol-containing phospholipids of C. urealyticum.
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Affiliation(s)
- Genoveva Yagüe
- Departamento de Genética y Microbiología, Facultad de Medicina, Universidad de Murcia, Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - Manuel Segovia
- Departamento de Genética y Microbiología, Facultad de Medicina, Universidad de Murcia, Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - Pedro L Valero-Guillén
- Departamento de Genética y Microbiología, Facultad de Medicina, Universidad de Murcia, Campus Universitario de Espinardo, 30100 Murcia, Spain
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Rodríguez-Gancedo MB, Rodríguez-González T, Yagüe G, Valero-Guillén PL, Segovia-Hernández M. Mycobacterium peregrinum bacteremia in an immunocompromised patient with a Hickman catheter. Eur J Clin Microbiol Infect Dis 2001; 20:589-90. [PMID: 11681443 DOI: 10.1007/s100960100561] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- M B Rodríguez-Gancedo
- Servicio de Microbiología, Hospital Universitario Morales Meseguer, Universidad de Murcia, Spain
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24
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Yagüe G, Segovia M, Valero-Guillén PL. Detection of mycoloylglycerol by thin-layer chromatography as a tool for the rapid inclusion of corynebacteria of clinical origin in the genus Corynebacterium. J Chromatogr B Biomed Sci Appl 2000; 738:181-5. [PMID: 10778941 DOI: 10.1016/s0378-4347(99)00495-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A chemotaxonomic study of some corynebacteria isolated from clinical samples revealed characteristic thin-layer chromatographic patterns for meso-diaminopimelic acid containing species included in the genera Corynebacterium, Dermabacter and Brevibacterium. Notably, a specific compound was consistently detected in mycolic acid containing species of the genus Corynebacterium. This compound was composed by glycerol and mycolic acids and structural analyses carried out by fast atom bombardment mass spectrometry in C. minutissimum confirmed its identification as mycoloylglycerol. The chain length of mycoloyl groups in this molecule ranged from 28 to 34 carbon atoms, being mono-, di- or triunsaturated. Detection of mycoloylglycerol by thin-layer chromatography may be thus useful for the rapid inclusion of a great variety of corynebacteria of clinical origin in the genus Corynebacterium in laboratories employing chromatographic techniques as an adjunct for the identification of these microorganisms.
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Affiliation(s)
- G Yagüe
- Departmento de Genética y Microbiología, Facultad de Medicina, Universidad de Murcia, Spain
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25
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Toldos CM, Yagüe G, Ortiz G, Segovia M. Assessment of multiple coagulase-negative staphylococci isolated in blood cultures using pulsed-field gel electrophoresis. Eur J Clin Microbiol Infect Dis 1997; 16:581-6. [PMID: 9323469 DOI: 10.1007/bf02447920] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
One of the criteria used to determine the clinical importance of coagulase-negative staphylococci (CNS) is the isolation of the bacteria from sequential blood cultures. Sequential isolates of CNS obtained from five immunocompromised patients over three months were genetically characterized by pulsed-field gel electrophoresis (PFGE). This typing method was compared to two first-line typing methods: determination of the species and of antibiotic susceptibility. In four patients the initial clinical evaluation changed because of the PFGE results several episodes of bacteremia would have been wrongly assessed if only the biotype and the antibiotype had been determined. Pulsed-field gel electrophoresis should therefore be used for CNS strains from immunocompromised patients or those suffering from chronic diseases with non-concordant biotype and anti-biotype.
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Affiliation(s)
- C M Toldos
- Servicio de Microbiología, Hospital General Universitario, Murcia, Spain
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Abstract
The type strain and several clinical isolates of Corynebacterium amycolatum were examined for lipid composition as a chemotaxonomic character for routine identification. The phospholipid profile was composed of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and phosphatidylinositol mannosides, together with various unidentified compounds. One of them, accounting for 20-29% of total phospholipids, was purified and characterized as acyl phosphatidylglycerol by chromatographic and spectrometric techniques. The acyl substituents on the phosphatidyl moiety were characterized as tetradecanoyl, pentadecanoyl, hexadecenoyl, hexadecanoyl, heptadecenoyl, heptadecanoyl, octadecenoyl (the major one), and octadecanoyl. The acyl group on the polar head (glycerol) was only octadecenoyl. Phospholipid analysis by thin-layer chromatography of a collection of Corynebacterium strains proved that this compound is widely distributed, although it only represents a minor (2-9%) component among mycolic acid-containing species. Acyl phosphatidylglycerol can be considered as a useful chemical marker for the identification of C. amycolatum in addition to the absence of mycolic acids.
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Affiliation(s)
- G Yagüe
- Departamento de Genética y Microbiologia, Facultad de Medicina, Universidad de Murcia, Spain
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Yagüe G, Herrera EA, Segovia M. In-vitro activity of a new quinolone, clinafloxacin, against clinical isolates of Corynebacterium species. J Antimicrob Chemother 1996; 38:740-2. [PMID: 8937971 DOI: 10.1093/jac/38.4.740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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Brufau C, Yagüe G, Martín Luengo F, Artero JM, Segovia M. [Tuberous lesion in the dorsum of the hand in an immunocompetent patient]. Enferm Infecc Microbiol Clin 1996; 14:55-6. [PMID: 8714188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- C Brufau
- Servicio de Dermatología, Hospital General Universitario de Murcia
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