Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 45
Filtrar
Más filtros

Banco de datos
Tipo del documento
Intervalo de año de publicación
1.
J Clin Microbiol ; 60(9): e0021722, 2022 09 21.
Artículo en Inglés | MEDLINE | ID: mdl-35969171

RESUMEN

The Bruker Biotyper matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) platform was assessed on its ability to accurately identify 314 nontuberculous mycobacteria (NTM) representing 73 species. All NTM isolates, representing 183 rapidly growing and 131 slowly growing organisms, were previously identified by Sanger DNA sequencing of the full-length 16S rRNA gene, and region V of the rpoB gene. An optimized version of the Bruker bead-beating procedure for protein extraction of NTM isolates was used to ensure high quality spectra for all NTM isolates, including less frequently encountered species. NTM spectra were analyzed using Bruker's research use only, Mycobacteria Library v6.0, supplemented by the MicrobeNet database. Identification of NTM by MALDI-TOF had an accuracy of 94% (296/314). The identification accuracy for rapidly growing mycobacteria was higher at 99% (182/183) than it was for slowly growing mycobacteria at 87% (114/131). While MALDI-TOF performed well against Sanger sequencing of the 16S rRNA gene alone, there were 11 species that required additional sequencing of rpoB. Most discrepancies between MALDI-TOF and sequencing results are likely due to underrepresentation of some species in the libraries used. Overall, the results of this study support Bruker's MALDI-TOF platform as an accurate and reliable method for the identification of NTM.


Asunto(s)
Infecciones por Mycobacterium no Tuberculosas , Micobacterias no Tuberculosas , Humanos , Infecciones por Mycobacterium no Tuberculosas/diagnóstico , Infecciones por Mycobacterium no Tuberculosas/microbiología , ARN Ribosómico 16S/genética , Análisis de Secuencia de ADN , Espectrometría de Masa por Láser de Matriz Asistida de Ionización Desorción/métodos
2.
Emerg Infect Dis ; 22(8): 1340-1347, 2016 08.
Artículo en Inglés | MEDLINE | ID: mdl-27434822

RESUMEN

During 2013, the Maryland Department of Health and Mental Hygiene in Baltimore, MD, USA, received report of 2 Maryland residents whose surgical sites were infected with rapidly growing mycobacteria after cosmetic procedures at a clinic (clinic A) in the Dominican Republic. A multistate investigation was initiated; a probable case was defined as a surgical site infection unresponsive to therapy in a patient who had undergone cosmetic surgery in the Dominican Republic. We identified 21 case-patients in 6 states who had surgery in 1 of 5 Dominican Republic clinics; 13 (62%) had surgery at clinic A. Isolates from 12 (92%) of those patients were culture-positive for Mycobacterium abscessus complex. Of 9 clinic A case-patients with available data, all required therapeutic surgical intervention, 8 (92%) were hospitalized, and 7 (78%) required ≥3 months of antibacterial drug therapy. Healthcare providers should consider infection with rapidly growing mycobacteria in patients who have surgical site infections unresponsive to standard treatment.


Asunto(s)
Turismo Médico , Infecciones por Mycobacterium no Tuberculosas/epidemiología , Infecciones por Mycobacterium no Tuberculosas/microbiología , Mycobacterium abscessus , Adolescente , Adulto , Brotes de Enfermedades , República Dominicana/epidemiología , Femenino , Humanos , Persona de Mediana Edad , Infecciones por Mycobacterium no Tuberculosas/tratamiento farmacológico , Infecciones por Mycobacterium no Tuberculosas/economía , Cirugía Plástica/efectos adversos , Infección de la Herida Quirúrgica , Estados Unidos/epidemiología , Adulto Joven
3.
Clin Infect Dis ; 59(1): 1-8, 2014 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-24729502

RESUMEN

BACKGROUND: Compounding pharmacies often prepare parenteral nutrition (PN) and must adhere to rigorous standards to avoid contamination of the sterile preparation. In March 2011, Serratia marcescens bloodstream infections (BSIs) were identified in 5 patients receiving PN from a single compounding pharmacy. An investigation was conducted to identify potential sources of contamination and prevent further infections. METHODS: Cases were defined as S. marcescens BSIs in patients receiving PN from the pharmacy between January and March 2011. We reviewed case patients' clinical records, evaluated pharmacy compounding practices, and obtained epidemiologically directed environmental cultures. Molecular relatedness of available Serratia isolates was determined by pulsed-field gel electrophoresis (PFGE). RESULTS: Nineteen case patients were identified; 9 died. The attack rate for patients receiving PN in March was 35%. No case patients were younger than 18 years. In October 2010, the pharmacy began compounding and filter-sterilizing amino acid solution for adult PN using nonsterile amino acids due to a national manufacturer shortage. Review of this process identified breaches in mixing, filtration, and sterility testing practices. S. marcescens was identified from a pharmacy water faucet, mixing container, and opened amino acid powder. These isolates were indistinguishable from the outbreak strain by PFGE. CONCLUSIONS: Compounding of nonsterile amino acid components of PN was initiated due to a manufacturer shortage. Failure to follow recommended compounding standards contributed to an outbreak of S. marcescens BSIs. Improved adherence to sterile compounding standards, critical examination of standards for sterile compounding from nonsterile ingredients, and more rigorous oversight of compounding pharmacies is needed to prevent future outbreaks.


Asunto(s)
Bacteriemia/epidemiología , Brotes de Enfermedades , Nutrición Parenteral/efectos adversos , Farmacia , Infecciones por Serratia/epidemiología , Serratia marcescens/aislamiento & purificación , Adulto , Anciano , Anciano de 80 o más Años , Composición de Medicamentos/normas , Electroforesis en Gel de Campo Pulsado , Femenino , Genotipo , Humanos , Masculino , Persona de Mediana Edad , Tipificación Molecular , Serratia marcescens/clasificación , Serratia marcescens/genética
4.
MMWR Morb Mortal Wkly Rep ; 63(9): 201-2, 2014 Mar 07.
Artículo en Inglés | MEDLINE | ID: mdl-24598597

RESUMEN

In August 2013, the Maryland Department of Health and Mental Hygiene (MDHMH) was notified of two persons with rapidly growing nontuberculous mycobacterial (RG-NTM) surgical-site infections. Both patients had undergone surgical procedures as medical tourists at the same private surgical clinic (clinic A) in the Dominican Republic the previous month. Within 7 days of returning to the United States, both sought care for symptoms that included surgical wound abscesses, clear fluid drainage, pain, and fever. Initial antibiotic therapy was ineffective. Material collected from both patients' wounds grew Mycobacterium abscessus exhibiting a high degree of antibiotic resistance characteristic of this organism.


Asunto(s)
Brotes de Enfermedades , Turismo Médico , Infecciones por Mycobacterium/epidemiología , Mycobacterium/clasificación , Procedimientos de Cirugía Plástica/efectos adversos , Infección de la Herida Quirúrgica/epidemiología , Adolescente , Adulto , Centers for Disease Control and Prevention, U.S. , República Dominicana , Femenino , Humanos , Persona de Mediana Edad , Mycobacterium/aislamiento & purificación , Infecciones por Mycobacterium/etiología , Infección de la Herida Quirúrgica/etiología , Estados Unidos/epidemiología , Adulto Joven
5.
Aesthet Surg J ; 33(2): 265-9, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-23335647

RESUMEN

UNLABELLED: A cluster of 3 facial Mycobacterium chelonae infections occurred after cosmetic dermal filler injections at a plastic surgery clinic. Pulsed-field gel electrophoresis showed that M chelonae isolated from the clinic tap water were identical to the patient wound isolates. Review of injection procedures identified application of nonsterile ice to the skin prior to injection as a possible source of M chelonae. Surveys of regional laboratories and a national plastic surgery listserv identified no other cases related to the injection of this brand of dermal filler. This is the first report of cutaneous M chelonae infections following the injection of dermal fillers. It adds to a growing body of literature on postinjection M chelonae infections and reinforces the importance of optimal skin disinfection steps prior to percutaneous procedures. LEVEL OF EVIDENCE: 5.


Asunto(s)
Técnicas Cosméticas/efectos adversos , Infecciones por Mycobacterium no Tuberculosas/etiología , Mycobacterium chelonae/aislamiento & purificación , Técnicas Cosméticas/normas , Electroforesis en Gel de Campo Pulsado , Cara , Femenino , Humanos , Hielo/normas , Persona de Mediana Edad , Infecciones por Mycobacterium no Tuberculosas/diagnóstico , Infecciones por Mycobacterium no Tuberculosas/microbiología , Microbiología del Agua , Abastecimiento de Agua
6.
Foodborne Pathog Dis ; 9(9): 861-7, 2012 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-22891917

RESUMEN

Cronobacter (formerly known as Enterobacter sakazakii) is a genus comprising seven species regarded as opportunistic pathogens that can be found in a wide variety of environments and foods, including powdered infant formula (PIF). Cronobacter sakazakii, the major species of this genus, has been epidemiologically linked to cases of bacteremia, meningitis in neonates, and necrotizing enterocolitis, and contaminated PIF has been identified as an important source of infection. Robust and reproducible subtyping methods are required to aid in the detection and investigation, of foodborne outbreaks. In this study, a pulsed-field gel electrophoresis (PFGE) protocol was developed and validated for subtyping Cronobacter species. It was derived from an existing modified PulseNet protocol, wherein XbaI and SpeI were the primary and secondary restriction enzymes used, generating an average of 14.7 and 20.3 bands, respectively. The PFGE method developed was both reproducible and discriminatory for subtyping Cronobacter species.


Asunto(s)
Cronobacter/clasificación , Tipificación Molecular/métodos , Análisis del Polimorfismo de Longitud de Fragmentos Amplificados , Animales , Cronobacter/genética , Cronobacter/aislamiento & purificación , Cronobacter/metabolismo , Cronobacter sakazakii/clasificación , Cronobacter sakazakii/genética , Cronobacter sakazakii/aislamiento & purificación , Cronobacter sakazakii/metabolismo , Enzimas de Restricción del ADN , ADN Bacteriano/química , ADN Bacteriano/genética , ADN Bacteriano/metabolismo , Electroforesis en Gel de Campo Pulsado , Infecciones por Enterobacteriaceae/diagnóstico , Infecciones por Enterobacteriaceae/microbiología , Alimentos en Conserva/microbiología , Enfermedades Transmitidas por los Alimentos/diagnóstico , Enfermedades Transmitidas por los Alimentos/microbiología , Humanos , Leche/microbiología , Reproducibilidad de los Resultados , Vibrio cholerae/clasificación , Vibrio cholerae/genética , Vibrio cholerae/aislamiento & purificación , Vibrio cholerae/metabolismo , Yersinia pestis/clasificación , Yersinia pestis/genética , Yersinia pestis/aislamiento & purificación , Yersinia pestis/metabolismo
7.
Clin Infect Dis ; 48(11): 1580-3, 2009 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-19400746

RESUMEN

We report 6 cases of postsurgical endophthalmitis due to gram-negative bacteria associated with contaminated trypan blue dye from a compounding pharmacy. Unopened trypan blue syringes yielded Pseudomonas aeruginosa and Burkholderia cepacia complex on culture, with pulsed-field gel electrophoresis patterns indistinguishable from patient isolates. Contamination of compounded medications should be considered when investigating outbreaks of postoperative endophthalmitis.


Asunto(s)
Infección Hospitalaria/epidemiología , Brotes de Enfermedades , Contaminación de Medicamentos , Endoftalmitis/epidemiología , Infecciones por Bacterias Gramnegativas/epidemiología , Soluciones Oftálmicas , Infección de la Herida Quirúrgica/epidemiología , Anciano , Anciano de 80 o más Años , Complejo Burkholderia cepacia/clasificación , Complejo Burkholderia cepacia/genética , Complejo Burkholderia cepacia/aislamiento & purificación , Análisis por Conglomerados , Infección Hospitalaria/microbiología , Dermatoglifia del ADN , Electroforesis en Gel de Campo Pulsado , Endoftalmitis/microbiología , Genotipo , Infecciones por Bacterias Gramnegativas/microbiología , Humanos , Masculino , Persona de Mediana Edad , Pseudomonas aeruginosa/clasificación , Pseudomonas aeruginosa/genética , Pseudomonas aeruginosa/aislamiento & purificación , Infección de la Herida Quirúrgica/microbiología , Azul de Tripano
8.
Clin Infect Dis ; 47(11): 1372-9, 2008 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-18937575

RESUMEN

BACKGROUND: Pharmaceutical compounding, the manipulation of ingredients to create a customized medication, is a widespread practice. In January 2005, the Centers for Disease Control and Prevention was notified of 4 cases of Pseudomonas fluorescens bacteremia that were traced to contaminated heparinized saline intravenous flush syringes prepared as a compounded medical product. PATIENTS AND METHODS: We reviewed medical records of symptomatic patients with P. fluorescens-positive cultures of blood specimens or sections of explanted catheters, reviewed the production process of syringes, performed syringe cultures, compared isolates by pulsed-field gel electrophoresis (PFGE), and examined catheters by scanning electron microscopy. RESULTS: We identified 80 patients in 6 states with P. fluorescens-positive cultures during December 2004-March 2006. Sixty-four patients (80%) had received a diagnosis of cancer. Seventy-four (99%) of 75 patients for whom information about catheter type was available had long-term indwelling catheters. Thirty-three (41%) of 80 cases were diagnosed 84-421 days after the patient's last potential exposure to a contaminated flush (delayed-onset cases). Compared with patients with early infection onset, more patients with delayed infection onset had venous ports (100% versus 50%; P <.001). By PFGE, clinical isolates from 50 (98%) of 51 patients were related to isolates cultured from unopened syringes. Scanning electron microscopy of explanted catheters revealed biofilms containing organisms morphologically consistent with P. fluorescens. CONCLUSION: This outbreak underscores important challenges in ensuring the safety of compounded pharmaceuticals and demonstrates the potential for substantially delayed infections after exposures to contaminated infusates. Exposures to compounded products should be considered when investigating outbreaks. Patients exposed to contaminated infusates require careful follow-up, because infections can occur long after exposure.


Asunto(s)
Bacteriemia/epidemiología , Catéteres de Permanencia/efectos adversos , Infección Hospitalaria/epidemiología , Brotes de Enfermedades , Infecciones por Pseudomonas/epidemiología , Pseudomonas fluorescens/aislamiento & purificación , Cloruro de Sodio/efectos adversos , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Bacteriemia/microbiología , Técnicas de Tipificación Bacteriana , Sangre/microbiología , Catéteres de Permanencia/microbiología , Niño , Preescolar , Infección Hospitalaria/microbiología , Electroforesis en Gel de Campo Pulsado , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Microscopía Electrónica de Rastreo , Persona de Mediana Edad , Infecciones por Pseudomonas/microbiología , Pseudomonas fluorescens/clasificación , Pseudomonas fluorescens/genética , Cloruro de Sodio/uso terapéutico
9.
N Engl J Med ; 352(5): 468-75, 2005 Feb 03.
Artículo en Inglés | MEDLINE | ID: mdl-15689585

RESUMEN

BACKGROUND: Methicillin-resistant Staphylococcus aureus (MRSA) is an emerging cause of infections outside of health care settings. We investigated an outbreak of abscesses due to MRSA among members of a professional football team and examined the transmission and microbiologic characteristics of the outbreak strain. METHODS: We conducted a retrospective cohort study and nasal-swab survey of 84 St. Louis Rams football players and staff members. S. aureus recovered from wound, nasal, and environmental cultures was analyzed by means of pulsed-field gel electrophoresis (PFGE) and typing for resistance and toxin genes. MRSA from the team was compared with other community isolates and hospital isolates. RESULTS: During the 2003 football season, eight MRSA infections occurred among 5 of the 58 Rams players (9 percent); all of the infections developed at turf-abrasion sites. MRSA infection was significantly associated with the lineman or linebacker position and a higher body-mass index. No MRSA was found in nasal or environmental samples; however, methicillin-susceptible S. aureus was recovered from whirlpools and taping gel and from 35 of the 84 nasal swabs from players and staff members (42 percent). MRSA from a competing football team and from other community clusters and sporadic cases had PFGE patterns that were indistinguishable from those of the Rams' MRSA; all carried the gene for Panton-Valentine leukocidin and the gene complex for staphylococcal-cassette-chromosome mec type IVa resistance (clone USA300-0114). CONCLUSIONS: We describe a highly conserved, community-associated MRSA clone that caused abscesses among professional football players and that was indistinguishable from isolates from various other regions of the United States.


Asunto(s)
Absceso/microbiología , Resistencia a la Meticilina , Infecciones Cutáneas Estafilocócicas/microbiología , Staphylococcus aureus/genética , Absceso/epidemiología , Adulto , Células Clonales , Estudios de Cohortes , Infecciones Comunitarias Adquiridas/epidemiología , Infecciones Comunitarias Adquiridas/microbiología , Brotes de Enfermedades , Electroforesis en Gel de Campo Pulsado , Fútbol Americano , Geles , Humanos , Hidroterapia , Masculino , Pruebas de Sensibilidad Microbiana , Nariz/microbiología , Estudios Retrospectivos , Factores de Riesgo , Piel/lesiones , Piel/microbiología , Infecciones Estafilocócicas/epidemiología , Infecciones Estafilocócicas/microbiología , Infecciones Cutáneas Estafilocócicas/epidemiología , Infecciones Cutáneas Estafilocócicas/transmisión , Staphylococcus aureus/clasificación , Staphylococcus aureus/aislamiento & purificación , Estados Unidos/epidemiología
10.
Appl Environ Microbiol ; 74(8): 2480-7, 2008 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-18310417

RESUMEN

Between March and May 2006, a Texas hospital identified five Mycobacterium mucogenicum bloodstream infections among hospitalized oncology patients using fluorescence high-performance liquid chromatography analysis of mycolic acids. Isolates from blood cultures were compared to 16 isolates from environmental sites or water associated with this ward. These isolates were further characterized by hsp65, 16S rRNA, and rpoB gene sequencing, hsp65 PCR restriction analysis, and molecular typing methods, including repetitive element PCR, random amplified polymorphic DNA PCR, and pulsed-field gel electrophoresis (PFGE) of large restriction fragments. Three of five patient isolates were confirmed as M. mucogenicum and were in a single cluster as determined by all identification and typing methods. The remaining two patient isolates were identified as different strains of Mycobacterium phocaicum by rpoB sequence analysis. One of these matched an environmental isolate from a swab of a hand shower in the patient's room, while none of the clinical isolates of M. mucogenicum matched environmental strains. Among the other 15 environmental isolates, 11 were identified as M. mucogenicum and 4 as M. phocaicum strains, all of which were unrelated by typing methods. Although the 16S rRNA gene sequences matched for all 14 M. mucogenicum isolates, there were two each of the hsp65 and rpoB sequevars, seven PCR typing patterns, and 12 PFGE patterns. Among the seven M. phocaicum isolates were three 16S rRNA sequevars, two hsp65 sequevars, two rpoB sequevars, six PCR typing patterns, and six PFGE patterns. This outbreak represents the first case of catheter-associated bacteremia caused by M. phocaicum and the first report of clinical isolates from a U.S. hospital. The investigation highlights important differences in the available typing methods for mycobacteria and demonstrates the genetic diversity of these organisms even within narrow confines of time and space.


Asunto(s)
Bacteriemia/microbiología , Infección Hospitalaria/microbiología , Brotes de Enfermedades , Microbiología Ambiental , Variación Genética , Infecciones por Mycobacterium/microbiología , Mycobacterium/clasificación , Anciano , Bacteriemia/epidemiología , Proteínas Bacterianas/genética , Técnicas de Tipificación Bacteriana , Chaperonina 60 , Chaperoninas/genética , Análisis por Conglomerados , Infección Hospitalaria/epidemiología , Dermatoglifia del ADN , ADN Bacteriano/química , ADN Bacteriano/genética , ADN Ribosómico/química , ADN Ribosómico/genética , ARN Polimerasas Dirigidas por ADN/genética , Electroforesis en Gel de Campo Pulsado , Femenino , Genotipo , Hospitales , Humanos , Masculino , Epidemiología Molecular , Datos de Secuencia Molecular , Mycobacterium/genética , Mycobacterium/aislamiento & purificación , Infecciones por Mycobacterium/epidemiología , Reacción en Cadena de la Polimerasa , ARN Ribosómico 16S/genética , Técnica del ADN Polimorfo Amplificado Aleatorio , Análisis de Secuencia de ADN , Texas/epidemiología
11.
Transfusion ; 48(10): 2177-83, 2008 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-18564393

RESUMEN

BACKGROUND: An elderly man with chronic myelomonocytic leukemia developed respiratory distress and died less than 48 hours after transfusion of a pool of eight whole blood-derived platelets (PLTs). Blood cultures from the recipient and cultures of remnants from the pooled PLT bag grew group C streptococci (GCS). An investigation was conducted to identify both the infection's source and the reasons for the false-negative screening result. STUDY DESIGN AND METHODS: Red blood cell (RBC) units (cocomponent from the eight donations) were traced, quarantined, and cultured. Specimens from the implicated donor were obtained. Isolates were identified and typed by 16S rRNA and pulsed-field gel electrophoresis (PFGE). The blood center screening method was reviewed. RESULTS: beta-Hemolytic GCS, cultured from 1 of 8 RBC units, linked the fatal case to a single donor. The donor's throat swab collected 20 days after donation was positive for the presence of GCS, identified as Streptococcus dysgalactiae subsp. equisimilis. Isolates from the recipient, RBC unit, residual PLTs, and donor's throat swab were indistinguishable by PFGE. The donor denied any symptoms of infection before or after donation. PLT bacterial screening at the blood center was performed using a commercially available bacterial detection system (BacT/ALERT, bioMérieux) with a threshold of 15 colony-forming units per bag. CONCLUSION: An asymptomatic donor was implicated as the source of GCS-contaminated PLTs. Current screening methods for PLTs are not sufficient to detect all bacterial contamination. Pooled PLTs are a particular challenge because the small volume of individual units places limits on culturing strategies. Improved detection of bacterial contamination of PLTs is needed.


Asunto(s)
Plaquetas/microbiología , Transfusión de Plaquetas/efectos adversos , Infecciones Estreptocócicas/transmisión , Streptococcus/aislamiento & purificación , Anciano , Donantes de Sangre , Resultado Fatal , Humanos , Masculino , Técnicas Microbiológicas , Streptococcus/clasificación
12.
Clin Infect Dis ; 45(5): 527-33, 2007 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-17682984

RESUMEN

BACKGROUND: In contrast to pharmaceutical manufacturers, compounding pharmacies adhere to different quality-control standards, which may increase the likelihood of undetected outbreaks. In 2005, the Centers for Disease Control and Prevention received reports of cases of Serratia marcescens bloodstream infection occurring in patients who underwent cardiac surgical procedures in Los Angeles, California, and in New Jersey. An investigation was initiated to determine whether there was a common underlying cause. METHODS: A matched case-control study was conducted in Los Angeles. Case record review and environmental testing were conducted in New Jersey. The Centers for Disease Control and Prevention performed a multistate case-finding investigation; isolates were compared using pulsed-field gel electrophoresis analysis. RESULTS: Nationally distributed magnesium sulfate solution (MgSO(4)) from compounding pharmacy X was the only significant risk factor for S. marcescens bloodstream infection (odds ratio, 6.4; 95% confidence interval, 1.1-38.3) among 6 Los Angeles case patients and 18 control subjects. Five New Jersey case patients received MgSO(4) from a single lot produced by compounding pharmacy X; culture of samples from open and unopened 50-mL bags in this lot yielded S. marcescens. Seven additional case patients from 3 different states were identified. Isolates from all 18 case patients and from samples of MgSO(4) demonstrated indistinguishable pulsed-field gel electrophoresis patterns. Compounding pharmacy X voluntarily recalled the product. Neither the pharmacy nor the US Food and Drug Administration could identify a source of contamination in their investigations of compounding pharmacy X. CONCLUSIONS: A multistate outbreak of S. marcescens bloodstream infection was linked to contaminated MgSO(4) distributed nationally by a compounding pharmacy. Health care personnel should take into account the different quality standards and regulation of compounded parenteral medications distributed in large quantities during investigations of outbreaks of bloodstream infection.


Asunto(s)
Bacteriemia/epidemiología , Fármacos Cardiovasculares/efectos adversos , Brotes de Enfermedades , Contaminación de Medicamentos , Sulfato de Magnesio/efectos adversos , Infecciones por Serratia/etiología , Serratia marcescens/patogenicidad , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Bacteriemia/microbiología , Procedimientos Quirúrgicos Cardíacos , Centers for Disease Control and Prevention, U.S./estadística & datos numéricos , Infección Hospitalaria/epidemiología , Infección Hospitalaria/microbiología , Composición de Medicamentos/efectos adversos , Composición de Medicamentos/normas , Femenino , Humanos , Los Angeles/epidemiología , Masculino , Persona de Mediana Edad , New Jersey/epidemiología , Factores de Riesgo , Infecciones por Serratia/epidemiología , Serratia marcescens/aislamiento & purificación , Estados Unidos
13.
Chest ; 132(6): 1825-31, 2007 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-17925414

RESUMEN

BACKGROUND: No guidelines exist for the type of mouthwash that should be used in patients at increased risk for pneumonia. In 2005, we investigated a multistate outbreak of Burkholderia cenocepacia associated with an intrinsically contaminated alcohol-free mouthwash (AFM). METHODS: We conducted a case-series investigation. We used repetitive extragenic palindromic- polymerase chain reaction typing and pulsed-field gel electrophoresis (PFGE) to characterize available Burkholderia cepacia complex (Bcc) isolates from patients and implicated AFM. Seeding studies were conducted to determine the antimicrobial activity of the AFM. RESULTS: Of the 116 patients with Bcc infection or colonization identified from 22 hospitals with culture dates from April 7 through August 31, 2005, 105 had infections or colonizations that were due to B cenocepacia. The median age of these 105 patients was 64 years (range, 6 to 94 years), 52% were women, 55% had evidence of infection, and 2 patients died. Of 139 patient culture specimens, 83 (60%) were from the respiratory tract. Among 103 Bcc patient isolates characterized, 81 (76%) had an indistinguishable PFGE pattern compared to the outbreak strain cultured from implicated lots of unopened AFM; the species was B cenocepacia. Seeding studies showed that the contaminated AFM might have had inadequate amounts of the antimicrobial agent cetylpyridinium chloride. CONCLUSIONS: This intrinsically contaminated AFM led to a geographically dispersed outbreak of B cenocepacia. AFM without therapeutic label claims is regulated by the US Food and Drug Administration as a cosmetic rather than a drug and is therefore subject to limited quality control requirements. Clinicians should be aware that AFM is not sterile. Its use in intubated and other patients with increased risk of aspiration should be avoided.


Asunto(s)
Infecciones por Burkholderia/etiología , Burkholderia cepacia/patogenicidad , Brotes de Enfermedades , Contaminación de Medicamentos , Antisépticos Bucales , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Infecciones por Burkholderia/epidemiología , Burkholderia cepacia/aislamiento & purificación , Estudios de Casos y Controles , Niño , Electroforesis en Gel de Campo Pulsado , Femenino , Humanos , Masculino , Persona de Mediana Edad , Reacción en Cadena de la Polimerasa , Estados Unidos/epidemiología
14.
Infect Control Hosp Epidemiol ; 28(11): 1311-3, 2007 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-17926285

RESUMEN

We investigated an outbreak of infection in 10 patients with blood cultures positive for B. cepacia. All patients had indwelling intravenous catheters. Though we did not identify the source of the organism, our findings support the hypothesis that cross-contamination of multidose medications through the use of the same needle and syringe was a contributing factor.


Asunto(s)
Infecciones por Burkholderia/etiología , Burkholderia cepacia , Brotes de Enfermedades , Sepsis/etiología , Anciano , Instituciones de Atención Ambulatoria , Infecciones por Burkholderia/tratamiento farmacológico , Infecciones por Burkholderia/epidemiología , Estudios de Casos y Controles , Cateterismo Venoso Central/efectos adversos , Contaminación de Equipos , Femenino , Georgia/epidemiología , Hematología , Humanos , Masculino , Oncología Médica , Persona de Mediana Edad , Factores de Riesgo , Sepsis/epidemiología , Sepsis/microbiología
15.
Infect Control Hosp Epidemiol ; 28(5): 614-7, 2007 May.
Artículo en Inglés | MEDLINE | ID: mdl-17464927

RESUMEN

In September of 2004, we investigated 7 cases of post-myelography meningitis. Streptococcal species were recovered from blood or cerebrospinal fluid in all cases. Our findings suggest that droplet transmission of the oral flora of the clinician performing the procedure was the most likely source of these infections. The Centers for Disease Control and Prevention recommends the use of face masks by those performing myelograms.


Asunto(s)
Contaminación del Aire Interior/efectos adversos , Infección Hospitalaria/transmisión , Transmisión de Enfermedad Infecciosa de Profesional a Paciente , Meningitis Bacterianas/transmisión , Mielografía/efectos adversos , Infecciones Estreptocócicas/transmisión , Infección Hospitalaria/microbiología , Humanos , Control de Infecciones/métodos , Máscaras/estadística & datos numéricos , Meningitis Bacterianas/etiología , Meningitis Bacterianas/microbiología , Infecciones Estreptocócicas/etiología , Infecciones Estreptocócicas/microbiología
16.
Arch Intern Med ; 166(22): 2518-24, 2006.
Artículo en Inglés | MEDLINE | ID: mdl-17159019

RESUMEN

BACKGROUND: Increased Clostridium difficile-associated disease (CDAD) in a hospital and an affiliated long-term care facility continued despite infection control measures. We investigated this outbreak to determine risk factors and transmission settings. METHODS: The CDAD cases were compared according to where the disease was likely acquired based on health care exposure and characterization of isolates from case patients, asymptomatic carriers, and the environment. Antimicrobial susceptibility testing, strain typing using pulsed-field gel electrophoresis, and toxinotyping were performed, and toxins A and B, binary toxin, and deletions in the tcdC gene were detected using polymerase chain reaction. Risk factors were examined in a case-control study, and overall antimicrobial use was compared at the hospital before and during the outbreak. RESULTS: Significant increases were observed in hospital-acquired (0.19 vs 0.86; P < .001) and long-term care facility-acquired (0.04 vs 0.31; P = .004) CDAD cases per 100 admissions as a result of transmission of a toxinotype III strain at the hospital and a toxinotype 0 strain at the long-term care facility. The toxinotype III strain was positive for binary toxin, an 18-base pair deletion in tcdC, and increased resistance to fluoroquinolones. Independent risk factors for CDAD included use of fluoroquinolones (odds ratio [OR], 3.22; P = .04), cephalosporins (OR, 5.19; P = .006), and proton pump inhibitors (OR, 5.02; P = .02). A significant increase in fluoroquinolone use at the hospital took place during the outbreak (185.5 defined daily doses per 1000 patient-days vs 200.9 defined daily doses per 1000 patient-days; P < .001). CONCLUSIONS: The hospital outbreak of CDAD was caused by transmission of a more virulent, fluoroquinolone-resistant strain of C difficile. More selective fluoroquinolone and proton pump inhibitor use may be important in controlling and preventing such outbreaks.


Asunto(s)
Clostridioides difficile , Infección Hospitalaria/epidemiología , Infección Hospitalaria/microbiología , Brotes de Enfermedades , Enterocolitis Seudomembranosa/epidemiología , Adulto , Anciano , Anciano de 80 o más Años , Algoritmos , Antiinfecciosos/uso terapéutico , Estudios de Casos y Controles , Electroforesis en Gel de Campo Pulsado , Femenino , Fluoroquinolonas/uso terapéutico , Humanos , Masculino , Persona de Mediana Edad , Instituciones Residenciales , Factores de Riesgo
17.
Infect Control Hosp Epidemiol ; 38(3): 314-319, 2017 03.
Artículo en Inglés | MEDLINE | ID: mdl-27919308

RESUMEN

OBJECTIVE To determine the source of a healthcare-associated outbreak of Pantoea agglomerans bloodstream infections. DESIGN Epidemiologic investigation of the outbreak. SETTING Oncology clinic (clinic A). METHODS Cases were defined as Pantoea isolation from blood or catheter tip cultures of clinic A patients during July 2012-May 2013. Clinic A medical charts and laboratory records were reviewed; infection prevention practices and the facility's water system were evaluated. Environmental samples were collected for culture. Clinical and environmental P. agglomerans isolates were compared using pulsed-field gel electrophoresis. RESULTS Twelve cases were identified; median (range) age was 65 (41-78) years. All patients had malignant tumors and had received infusions at clinic A. Deficiencies in parenteral medication preparation and handling were identified (eg, placing infusates near sinks with potential for splash-back contamination). Facility inspection revealed substantial dead-end water piping and inadequate chlorine residual in tap water from multiple sinks, including the pharmacy clean room sink. P. agglomerans was isolated from composite surface swabs of 7 sinks and an ice machine; the pharmacy clean room sink isolate was indistinguishable by pulsed-field gel electrophoresis from 7 of 9 available patient isolates. CONCLUSIONS Exposure of locally prepared infusates to a contaminated pharmacy sink caused the outbreak. Improvements in parenteral medication preparation, including moving chemotherapy preparation offsite, along with terminal sink cleaning and water system remediation ended the outbreak. Greater awareness of recommended medication preparation and handling practices as well as further efforts to better define the contribution of contaminated sinks and plumbing deficiencies to healthcare-associated infections are needed. Infect Control Hosp Epidemiol 2017;38:314-319.


Asunto(s)
Bacteriemia/diagnóstico , Infección Hospitalaria/diagnóstico , Brotes de Enfermedades , Contaminación de Medicamentos , Pantoea/aislamiento & purificación , Adulto , Anciano , Electroforesis en Gel de Campo Pulsado , Contaminación de Equipos , Femenino , Humanos , Illinois , Masculino , Persona de Mediana Edad , Servicio de Oncología en Hospital
18.
Chest ; 130(5): 1346-53, 2006 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-17099009

RESUMEN

BACKGROUND: Species within the Burkholderia cepacia complex (Bcc) can contaminate medications and disinfectants and cause severe pneumonia in critically ill patients or persons with cystic fibrosis. In March 2004, we investigated a hospital outbreak of Bcc possibly associated with a contaminated nasal spray. METHODS: We conducted a matched case-control study, environmental sampling, and observations of infection control practices. Case patients had infection or colonization with Bcc, and control patients had sputum culture not yielding Bcc. Isolates from patients and environmental samples were compared by pulsed-field gel electrophoresis (PFGE). RESULTS: Bcc was recovered from sputum in 18 patients. Compared with matched control patients (n = 18), case patients were more likely to be receiving mechanical ventilation (p = 0.01), to have been hospitalized > 6 days (p = 0.01), and to have received antimicrobial treatment within 7 days before sputum collection (p = 0.03). Bcc was cultured from opened, but not unopened, multidose albuterol bottles, a nebulizer attached to a ventilator, and opened and unopened nasal spray bottles from contaminated lots. PFGE showed that isolates from albuterol samples and from patients were indistinguishable but unrelated to the nasal spray strain. Observations revealed improper aseptic techniques during respiratory therapy procedures and inadequate nebulizer cleaning. CONCLUSIONS: Despite a temporal association with use of a contaminated nasal spray, this outbreak was caused by extrinsic contamination of multidose albuterol used for nebulization treatments and lack of adherence to infection control precautions. Implementation and re-enforcement of infection control measures successfully terminated the outbreak.


Asunto(s)
Albuterol/administración & dosificación , Broncodilatadores/administración & dosificación , Infecciones por Burkholderia/etiología , Burkholderia cepacia/patogenicidad , Brotes de Enfermedades , Contaminación de Medicamentos , Administración Intranasal , Adulto , Anciano , Albuterol/uso terapéutico , Broncodilatadores/uso terapéutico , Infecciones por Burkholderia/epidemiología , Estudios de Casos y Controles , Infección Hospitalaria/prevención & control , Infección Hospitalaria/transmisión , Brotes de Enfermedades/prevención & control , Contaminación de Equipos/prevención & control , Femenino , Humanos , Control de Infecciones/métodos , Masculino , Persona de Mediana Edad , Nebulizadores y Vaporizadores/microbiología , Esputo/microbiología , Ventiladores Mecánicos/microbiología
19.
Arch Intern Med ; 165(22): 2639-43, 2005.
Artículo en Inglés | MEDLINE | ID: mdl-16344422

RESUMEN

BACKGROUND: In March 2004, the Chicago Department of Public Health was notified of a cluster of bloodstream infections with Klebsiella oxytoca and Enterobacter cloacae at a chemotherapy center. Our purpose was to identify the source of the outbreak and prevent further cases. METHODS: The investigation included 103 oncology patients seen at an outpatient oncology chemotherapy center in Chicago during the 16 days before its closure. The outbreak investigation included case identification, retrospective cohort study, review of medical records, microbiologic testing of blood specimens, environmental cultures, and pulsed-field gel electrophoresis. The main outcome measure was infection with K oxytoca, E cloacae, or both, and the Mantel-Haenszel chi(2) test was used to assess risk of infection in relation to presence of central venous catheter. RESULTS: Among the 103 patients, risk of infection was associated with the presence of central venous catheter (relative risk undefined, P<.001). Twenty-seven patients had blood cultures that grew K oxytoca, E cloacae, or both, and all had central venous catheters that were flushed with isotonic sodium chloride solution at the clinic from February 17 through March 3, 2004. Isolates of K oxytoca and E cloacae were matched by pulsed-field gel electrophoresis to K oxytoca and E cloacae isolates obtained from multiple predrawn syringes and from the intravenous fluid and administration set in use in the clinic at the time of its closing. CONCLUSIONS: The injection of contaminated isotonic sodium chloride solution through the venous catheters of attendees at the clinic likely provided the opportunity for bloodstream infections in these 27 case patients. This outbreak highlights the need for continued emphasis on safe injection practices and suggests the need for guidelines and recommendations tailored to outpatient settings.


Asunto(s)
Bacteriemia/epidemiología , Infección Hospitalaria/epidemiología , Brotes de Enfermedades , Infecciones por Enterobacteriaceae/epidemiología , Infecciones por Klebsiella/epidemiología , Adulto , Anciano , Instituciones de Atención Ambulatoria , Antineoplásicos/administración & dosificación , Bacteriemia/etiología , Bacteriemia/microbiología , Instituciones Oncológicas , Cateterismo Venoso Central/efectos adversos , Cateterismo Venoso Central/instrumentación , Cateterismo Venoso Central/enfermería , Chicago/epidemiología , Estudios de Cohortes , Infección Hospitalaria/etiología , Infección Hospitalaria/microbiología , Enterobacter cloacae/aislamiento & purificación , Contaminación de Equipos , Equipo Reutilizado , Femenino , Humanos , Klebsiella oxytoca/aislamiento & purificación , Masculino , Persona de Mediana Edad , Neoplasias/tratamiento farmacológico , Estudios Retrospectivos
20.
Genome Announc ; 4(2)2016 Mar 17.
Artículo en Inglés | MEDLINE | ID: mdl-26988052

RESUMEN

Mycobacterium wolinskyi is a nonpigmented, rapidly growing nontuberculous mycobacterium species that is associated with bacteremia, peritonitis, infections associated with implants/prostheses, and skin and soft tissue infections often following surgical procedures in humans. Here, we report the first functionally annotated draft genome sequence of M. wolinskyi CDC_01.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA