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        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p class="elsevierStyleSimplePara elsevierViewall">To determine the prevalence of nontuberculous mycobacterial infection in patients with cystic fibrosis&#46;</p> <span class="elsevierStyleSectionTitle">Patients and methods</span><p class="elsevierStyleSimplePara elsevierViewall">We performed a prospective study in which patients with cystic fibrosis were followed for 2 years&#59; the patients were recruited from specialized units and were all over 6 years old&#46; Sputum samples collected every 6 months were stained with auramine-rhodamine and cultures were prepared with a liquid and a solid medium&#46; When stains or cultures were positive for nontuberculous mycobacteria&#44; 1 or 2 additional sputum samples were obtained from the patients&#44; who were monitored closely to assess the need for specific treatment&#46; We assessed the following clinical variables&#58; age&#44; sex&#44; presence of pancreatic insufficiency&#44; use of aerosol antibiotic therapy&#44; and long-term azithromycin and inhaled or oral corticosteroid therapies&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall">A total of 220 patients &#40;119 women&#41; with a mean age of 22&#46;62 years &#40;range&#44; 6-74 years&#41; were enrolled&#59; of these23&#46;6&#37; were receiving azithromycin&#46; We prepared 1303 sputum samples for mycobacterial growth &#40;range per patient&#44; 4-68 samples&#41;&#59; 65 samples from a total of 17 patients&#40;7&#46;72&#37;&#41; were positive&#58; 17 by auramine-rhodamine staining and 48 by culture&#46; Eighty-eight culture samples were contaminated and <span class="elsevierStyleItalic">Mycobacterium tuberculosis</span> was not isolated in any of the cases&#46; The mycobacteria isolated were <span class="elsevierStyleItalic">avium complex</span> &#40;n&#61;10&#41;&#44; <span class="elsevierStyleItalic">abscessus</span> &#40;n&#61;6&#41;&#44; and <span class="elsevierStyleItalic">fortuitum</span> &#40;n&#61;1&#41;&#46; Two or more positive cultures were obtained in 9 patients&#44; 5 of whom experienced clinical deterioration and were prescribed specific treatment&#46; No significant differences in clinical variables were found between patients with nontuberculous mycobacteria and those without&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p class="elsevierStyleSimplePara elsevierViewall">The prevalence of nontuberculous mycobacterial infection in patients with cystic fibrosis was not very high &#40;7&#46;72&#37;&#41;&#44; perhaps because azithromycin interfered with the growth of these bacteria&#46; Patients with repeat isolations of mycobacteria should be monitored closely&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">Evaluar la prevalencia de micobacterias ambientales &#40;MA&#41; en pacientes con fibrosis qu&#237;stica &#40;FQ&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Pacientes y m&#233;todos</span><p class="elsevierStyleSimplePara elsevierViewall">Se ha realizado un estudio prospectivo de 2 a&#241;os de duraci&#243;n en pacientes con FQ mayores de 6 a&#241;os&#44; procedentes de 6 unidades monogr&#225;ficas&#46; En las muestras respiratorias&#44; recogidas cada 6 meses&#44; se efectu&#243; una tinci&#243;n de auramina-rodamina&#44; adem&#225;s de cultivos en medios s&#243;lido y l&#237;quido&#46; Si se detectaba una tinci&#243;n o cultivo positivo para MA&#44; se recog&#237;an 1 o 2 esputos m&#225;s y se hac&#237;a un seguimiento estricto para valorar la necesidad de tratamiento espec&#237;fico&#46; Se consideraron las siguientes variables cl&#237;nicas&#58; edad&#44; sexo&#44; insuficiencia pancre&#225;tica&#44; diabetes&#44; uso de aerosolterapia antibi&#243;tica y de azitromicina de forma continua&#44; tratamientos con corticoides inhalados o por v&#237;a oral de forma prolongada&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall">Participaron en el estudio 220 pacientes &#40;119 mujeres&#41;&#44; con una edad media de 22&#44;62 a&#241;os &#40;rango&#58; 6-74&#41;&#46; El 24&#37; recib&#237;a azitromicina&#46; Se cultivaron para la detecci&#243;n de micobacterias 1&#46;303 muestras de esputo &#40;rango por paciente&#58; 4-68&#41;&#44; de las que la tinci&#243;n de auramina fue positiva en 17 casos y el cultivo en 48&#44; correspondientes a 17 pacientes &#40;7&#44;72&#37;&#41;&#46; En 88 muestras el cultivo estaba contaminado&#46; En ning&#250;n caso se aisl&#243; <span class="elsevierStyleItalic">Mycobacterium tuberculosis</span>&#46; Las MA aisladas fueron&#58; <span class="elsevierStyleItalic">M&#46; avium complex</span> &#40;n &#61; 10&#41;<span class="elsevierStyleItalic">&#44; M&#46; abscessus</span> &#40;n &#61; 6&#41; y <span class="elsevierStyleItalic">M&#46; fortuitum</span> &#40;n &#61; 1&#41;&#46; Cinco de los 9 pacientes que presentaron m&#225;s de un aislamiento tuvieron deterioro cl&#237;nico y se les indic&#243; tratamiento espec&#237;fico&#46; No hubo diferencias entre las variables cl&#237;nicas de los pacientes con y sin aislamientos de MA&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p class="elsevierStyleSimplePara elsevierViewall">La prevalencia de MA en pacientes con FQ no fue muy alta &#40;7&#44;72&#37;&#41;&#44; quiz&#225; debido a la interferencia de la azitromicina sobre el crecimiento de MA&#46; Hay que vigilar estrechamente a los pacientes con aislamientos repetidos&#46;</p>"
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Vol. 44. Issue 12.
Pages 679-684 (January 2008)
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Vol. 44. Issue 12.
Pages 679-684 (January 2008)
Original Articles
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Nontuberculous Mycobacterial Infection in Patients With Cystic Fibrosis: A Multicenter Prevalence Study
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Rosa M. Giróna,
Corresponding author
med002861@nacom.es

Correspondence: Dr R.M. Girón Moreno Servicio de Neumología, Hospital de la Princesa Diego de León, 62, 28006 Madrid, Spain
, Luis Máizb, Isabel Barrioc, M. Teresa Martínezd, Antonio Salcedoe, Concepción Pradosc
a Unidad de Fibrosis Quística, Hospital de la Princesa, Madrid, Spain
b Unidad de Fibrosis Quística, Hospital Ramón y Cajal, Madrid, Spain
c Unidad de Fibrosis Quística, Hospital La Paz, Madrid, Spain
d Unidad de Fibrosis Quística, Hospital 12 de Octubre, Madrid, Spain
e Unidad de Fibrosis Quística, Hospital Materno-Infantil del Gregorio Marañón, Madrid, Spain
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Objective

To determine the prevalence of nontuberculous mycobacterial infection in patients with cystic fibrosis.

Patients and methods

We performed a prospective study in which patients with cystic fibrosis were followed for 2 years; the patients were recruited from specialized units and were all over 6 years old. Sputum samples collected every 6 months were stained with auramine-rhodamine and cultures were prepared with a liquid and a solid medium. When stains or cultures were positive for nontuberculous mycobacteria, 1 or 2 additional sputum samples were obtained from the patients, who were monitored closely to assess the need for specific treatment. We assessed the following clinical variables: age, sex, presence of pancreatic insufficiency, use of aerosol antibiotic therapy, and long-term azithromycin and inhaled or oral corticosteroid therapies.

Results

A total of 220 patients (119 women) with a mean age of 22.62 years (range, 6-74 years) were enrolled; of these23.6% were receiving azithromycin. We prepared 1303 sputum samples for mycobacterial growth (range per patient, 4-68 samples); 65 samples from a total of 17 patients(7.72%) were positive: 17 by auramine-rhodamine staining and 48 by culture. Eighty-eight culture samples were contaminated and Mycobacterium tuberculosis was not isolated in any of the cases. The mycobacteria isolated were avium complex (n=10), abscessus (n=6), and fortuitum (n=1). Two or more positive cultures were obtained in 9 patients, 5 of whom experienced clinical deterioration and were prescribed specific treatment. No significant differences in clinical variables were found between patients with nontuberculous mycobacteria and those without.

Conclusions

The prevalence of nontuberculous mycobacterial infection in patients with cystic fibrosis was not very high (7.72%), perhaps because azithromycin interfered with the growth of these bacteria. Patients with repeat isolations of mycobacteria should be monitored closely.

Key words:
Cystic fibrosis
Nontuberculous mycobacteria
Mycobacterium avium
Mycobacterium abscessus
Objetivo

Evaluar la prevalencia de micobacterias ambientales (MA) en pacientes con fibrosis quística (FQ).

Pacientes y métodos

Se ha realizado un estudio prospectivo de 2 años de duración en pacientes con FQ mayores de 6 años, procedentes de 6 unidades monográficas. En las muestras respiratorias, recogidas cada 6 meses, se efectuó una tinción de auramina-rodamina, además de cultivos en medios sólido y líquido. Si se detectaba una tinción o cultivo positivo para MA, se recogían 1 o 2 esputos más y se hacía un seguimiento estricto para valorar la necesidad de tratamiento específico. Se consideraron las siguientes variables clínicas: edad, sexo, insuficiencia pancreática, diabetes, uso de aerosolterapia antibiótica y de azitromicina de forma continua, tratamientos con corticoides inhalados o por vía oral de forma prolongada.

Resultados

Participaron en el estudio 220 pacientes (119 mujeres), con una edad media de 22,62 años (rango: 6-74). El 24% recibía azitromicina. Se cultivaron para la detección de micobacterias 1.303 muestras de esputo (rango por paciente: 4-68), de las que la tinción de auramina fue positiva en 17 casos y el cultivo en 48, correspondientes a 17 pacientes (7,72%). En 88 muestras el cultivo estaba contaminado. En ningún caso se aisló Mycobacterium tuberculosis. Las MA aisladas fueron: M. avium complex (n = 10), M. abscessus (n = 6) y M. fortuitum (n = 1). Cinco de los 9 pacientes que presentaron más de un aislamiento tuvieron deterioro clínico y se les indicó tratamiento específico. No hubo diferencias entre las variables clínicas de los pacientes con y sin aislamientos de MA.

Conclusiones

La prevalencia de MA en pacientes con FQ no fue muy alta (7,72%), quizá debido a la interferencia de la azitromicina sobre el crecimiento de MA. Hay que vigilar estrechamente a los pacientes con aislamientos repetidos.

Palabras clave:
Fibrosis quística
Micobacterias ambientales
Mycobacterium avium
Mycobacterium abscessus
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Copyright © 2008. Sociedad Española de Neumología y Cirugía Torácica (SEPAR)
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