Guía de práctica clínica para el diagnóstico y el tratamiento de la otitis media aguda en niños.

BACKGROUND: Acute otitis media (AOM) is one of the most prevalent acute conditions in the pediatric population worldwide. This work aimed to elaborate a Clinical Practice Guideline with clinical recommendations systematically developed to assist decision-making of specialists, patients, caregivers, and public policymakers involved in managing patients with AOM in children. METHODS: This document was developed by the College of Pediatric Otorhinolaryngology and Head, and Neck Surgery of Mexico (COPEME) in compliance with international standards. The SIGN quality of evidence classification was used. On behalf of the COPEME, the Guideline Development Group (GDG) was integrated, including otolaryngologists, infectologists, pediatricians, general practitioners, and methodologists with experience in systematic literature reviews and the development of clinical practice guidelines. RESULTS: A consensus was reached on 18 clinical questions, covering what was previously established by the GDG in the scope document of the guidelines. Scientific evidence answering each of these clinical questions was identified and critically evaluated. The GDG agreed on the final wording of the clinical recommendations using the modified Delphi panel technique. Specialists and patient representatives conducted an external validation. CONCLUSIONS: This Clinical Practice Guideline presents clinical recommendations for the prevention, diagnosis, and management of AOM to assist shared decision-making among physicians, patients, and caregivers and improve the quality of clinical care.

INTRODUCCIÓN: La otitis media aguda (OMA) es uno de los padecimientos agudos más prevalentes en la población pediátrica a escala global. El objetivo de este trabajo fue elaborar una guía de práctica clínica con recomendaciones para asistir la toma de decisiones de médicos especialistas, pacientes, cuidadores de pacientes y elaboradores de políticas públicas involucrados en el manejo de la OMA en niños. MÉTODOS: El documento ha sido desarrollado por parte del Colegio de Otorrinolaringología y Cirugía de Cabeza y Cuello Pediátricas de México (COPEME) en cumplimiento con los estándares internacionales. Se empleó la clasificación de calidad de la evidencia de SIGN. En representación del COPEME, se integró el Grupo de Desarrollo de la Guía (GDG), que incluyó otorrinolaringólogos, infectólogos, pediatras, médicos generales y metodólogos con experiencia en revisiones sistemáticas de la literatura y el desarrollo de guías de práctica clínica. RESULTADOS: Se consensuaron 18 preguntas clínicas que abarcaron lo establecido previamente por el GDG en el documento de alcances de la Guía. Se identificó la evidencia científica que responde a cada una de estas preguntas clínicas y se evaluó críticamente. El GDG acordó la redacción final de las recomendaciones clínicas mediante la técnica Delphi de panel. Se llevó a cabo una validación externa por colegas especialistas y representantes de pacientes. CONCLUSIONES: En esta Guía de Práctica Clínica se presentan recomendaciones clínicas para la prevención, el diagnóstico y el manejo de la OMA, con el fin de asistir la toma de decisiones compartidas entre médicos, pacientes y cuidadores con la intención de contribuir a mejorar la calidad de la atención clínica.

Guía de práctica clínica para el diagnóstico y el tratamiento de la otitis media aguda en niños / Clinical practice guidelines for diagnosis and management of acute otitis media in children

Resumen Introducción: La otitis media aguda (OMA) es uno de los padecimientos agudos más prevalentes en la población pediátrica a escala global. El objetivo de este trabajo fue elaborar una guía de práctica clínica con recomendaciones para asistir la toma de decisiones de médicos especialistas, pacientes, cuidadores de pacientes y elaboradores de políticas públicas involucrados en el manejo de la OMA en niños. Métodos: El documento ha sido desarrollado por parte del Colegio de Otorrinolaringología y Cirugía de Cabeza y Cuello Pediátricas de México (COPEME) en cumplimiento con los estándares internacionales. Se empleó la clasificación de calidad de la evidencia de SIGN. En representación del COPEME, se integró el Grupo de Desarrollo de la Guía (GDG), que incluyó otorrinolaringólogos, infectólogos, pediatras, médicos generales y metodólogos con experiencia en revisiones sistemáticas de la literatura y el desarrollo de guías de práctica clínica. Resultados: Se consensuaron 18 preguntas clínicas que abarcaron lo establecido previamente por el GDG en el documento de alcances de la Guía. Se identificó la evidencia científica que responde a cada una de estas preguntas clínicas y se evaluó críticamente. El GDG acordó la redacción final de las recomendaciones clínicas mediante la técnica Delphi de panel. Se llevó a cabo una validación externa por colegas especialistas y representantes de pacientes. Conclusiones: En esta Guía de Práctica Clínica se presentan recomendaciones clínicas para la prevención, el diagnóstico y el manejo de la OMA, con el fin de asistir la toma de decisiones compartidas entre médicos, pacientes y cuidadores con la intención de contribuir a mejorar la calidad de la atención clínica.

Abstract Background: Acute otitis media (AOM) is one of the most prevalent acute conditions in the pediatric population worldwide. This work aimed to elaborate a Clinical Practice Guideline with clinical recommendations systematically developed to assist decision-making of specialists, patients, caregivers, and public policymakers involved in managing patients with AOM in children. Methods: This document was developed by the College of Pediatric Otorhinolaryngology and Head, and Neck Surgery of Mexico (COPEME) in compliance with international standards. The SIGN quality of evidence classification was used. On behalf of the COPEME, the Guideline Development Group (GDG) was integrated, including otolaryngologists, infectologists, pediatricians, general practitioners, and methodologists with experience in systematic literature reviews and the development of clinical practice guidelines. Results: A consensus was reached on 18 clinical questions, covering what was previously established by the GDG in the scope document of the guidelines. Scientific evidence answering each of these clinical questions was identified and critically evaluated. The GDG agreed on the final wording of the clinical recommendations using the modified Delphi panel technique. Specialists and patient representatives conducted an external validation. Conclusions: This Clinical Practice Guideline presents clinical recommendations for the prevention, diagnosis, and management of AOM to assist shared decision-making among physicians, patients, and caregivers and improve the quality of clinical care.

Streptococcus pneumoniae: prevalence in nasopharyngeal carriers of more than 50-years-old, in a Mexican rural community / Prevalencia de colonización nasofaríngea por Streptococcus pneumoniae, en adultos mayores de 50 años, en comunidades rurales de México

Introduction: Streptococcus pneumoniae (Sp) is the main cause of community-acquired pneumonia in the elderly, hence the importance to establish the prevalence of nasopharyngeal colonization by different Sp serotypes in adults. Methods: from December 2009 to June 2010, nasopharyngeal cultures were taken from adults living in rural communities in Mexico for the isolation and serotyping of Sp by the Quellung reaction. Penicillin and ceftriaxone susceptibility tests were performed by the microdilution method. Results: two hundred and thirty-six adults over 50 years old, were included. The prevalence of colonization by Sp was 21.6%. The most frequent serotypes were 19A (21%), 6A (13%), 6B and 11A (11%). All isolates were susceptible to ceftriaxone, and 52.8% of the isolates showed penicillin minimal inhibitory concentrations ≥0.12 mg/L. Conclusion: this is the first study analyzing the nasopharyngeal colonization by Sp in adults in Mexico. Serotypes not included in any of the pneumococcal vaccines were frequently identified

Introducción: Streptococcus pneumoniae (Sp) es la principal causa de neumonía adquirida en la comunidad en ancianos, de ahí la importancia de conocer la prevalencia de colonización nasofaríngea y los serotipos de Sp. Métodos: De diciembre de 2009 a junio de 2010 se realizaron cultivos nasofaríngeos en mayores de 50 años de comunidades rurales de México para la detección y serotipificación de Sp (reacción de Quellung). Se determinó la sensibilidad a penicilina y ceftriaxona mediante la técnica de microdilución. Resultados: Se incluyeron 236 sujetos. La prevalencia de colonización por Sp fue del 21,6%. Los serotipos más frecuentes fueron 19A (21%), 6A (13%), 6B y 11A (11%). El 100% eran sensibles a ceftriaxona y en el 52,8% la concentración mínima inhibitoria de penicilina fue ≥ 0,12 mg/l. Conclusión: Este es el primer estudio de colonización nasofaríngea por Sp en adultos realizado en México. Se identificaron con frecuencia serotipos circulantes no incluidos en ninguna de las vacunas neumocócicas

Streptococcus pneumoniae: prevalence in nasopharyngeal carriers of more than 50-years-old, in a Mexican rural community.

INTRODUCTION: Streptococcus pneumoniae (Sp) is the main cause of community-acquired pneumonia in the elderly, hence the importance to establish the prevalence of nasopharyngeal colonization by different Sp serotypes in adults. METHODS: from December 2009 to June 2010, nasopharyngeal cultures were taken from adults living in rural communities in Mexico for the isolation and serotyping of Sp by the Quellung reaction. Penicillin and ceftriaxone susceptibility tests were performed by the microdilution method. RESULTS: two hundred and thirty-six adults over 50 years old, were included. The prevalence of colonization by Sp was 21.6%. The most frequent serotypes were 19A (21%), 6A (13%), 6B and 11A (11%). All isolates were susceptible to ceftriaxone, and 52.8% of the isolates showed penicillin minimal inhibitory concentrations ≥0.12mg/L. CONCLUSION: this is the first study analyzing the nasopharyngeal colonization by Sp in adults in Mexico. Serotypes not included in any of the pneumococcal vaccines were frequently identified.

Streptococcus pneumoniae serotypes isolated from the middle ear of Mexican children diagnosed with acute otitis media.

OBJECTIVE: The aim of this study was to identify the etiology and the serotypes of S. pneumoniae (Sp) in Mexican children with acute otitis media (AOM). MATERIALS AND METHODS: The study includessamples frompatientsdiagnosed with AOM at the Federico Gomez Children's Hospital of Mexico (2002-2003),with positive culture for Sp bacteriologically confirmed in middle ear fluid obtained by tympanocentesis. All Sp were serotyped. A total of 138 samples from 135 children with AOM were included. RESULTS: Sp was isolated in 72 samples from 70 children. Sixty (85.7%) were previously healthy and 10 (14.3%) were immunocompromised. The most common serotypes were 6B and 19F (16.67%), and 6 A, 14 and 23F (15.27%). CONCLUSION: The distribution of serotypes among the children with AOM in the study is similar to that reported in developing cities, and 63.9% of the isolated serotypes are found to be included in the 7-Valent Pneumococcal Conjugate Vaccine (PCV), 68.1% in the 10-Valent PCV and 83.3% in 13-Valent PCV.

Streptococcus pneumoniae serotypes isolated from the middle ear of Mexican children diagnosed with acute otitis media / Serotipificación de Streptococcus pneumoniae aislados de líquido de oído medio en niños mexicanos con diagnóstico de otitis media aguda

OBJECTIVE: The aim of this study was to identify the etiology and the serotypes of S. pneumoniae (Sp) in Mexican children with acute otitis media (AOM). MATERIALS AND METHODS: The study includessamples frompatientsdiagnosed with AOM at the Federico Gomez Children's Hospital of Mexico (2002-2003),with positive culture for Sp bacteriologically confirmed in middle ear fluid obtained by tympanocentesis. All Sp were serotyped. A total of 138 samples from 135 children with AOM were included. RESULTS: Sp was isolated in 72 samples from 70 children. Sixty (85.7 percent) were previously healthy and 10 (14.3 percent) were immunocompromised. The most common serotypes were 6B and 19F (16.67 percent), and 6 A, 14 and 23F (15.27 percent). CONCLUSION: The distribution of serotypes among the children with AOM in the study is similar to that reported in developing cities, and 63.9 percent of the isolated serotypes are found to be included in the 7-Valent Pneumococcal Conjugate Vaccine (PCV), 68.1 percent in the 10-Valent PCV and 83.3 percent in 13-Valent PCV.

OBJETIVO: Conocer la etiología y serotipos de S. pneumoniae (Sp) en niños mexicanos, con otitis media aguda (OMA). MATERIAL Y MÉTODOS: Se incluyeron las muestras de pacientes con OMA del Hospital Infantil de México Federico Gómez (2002-2003), con cultivo positivo para Sp, (bacteriológicamente confirmados en el líquido del oído medio obtenido por timpanocentesis). Todos los Sp. fueron serotipificados. Se incluyeron 138 muestras de 135 niños con OMA. RESULTADOS: Sp. se aisló en 72 muestras de 70 niños: 60 (85.7 por ciento) eran previamente sanos y 10 (14.3 por ciento) eran inmunocomprometidos. Los serotipos más frecuentes fueron 6B y 19F (16.67 por ciento), y 6 A, 14 y 23F (15.27 por ciento). CONCLUSIONES: La distribución de los serotipos en niños con otitis media aguda fue similar a la reportada en ciudades en desarrollo y se observó que 63.9 por ciento de los serotipos aislados están incluidos en la vacuna conjugada 7-valente, 68.1 por ciento en la 10-valente y 83.3 por ciento en la 13-valente.

Meningococcal disease: is it a latent disease in Mexico?

Infection by Neisseria meningitidis occurs frst as an asymptomatic carrier before the disease with serious manifestations like meningitis, with or without expressions of fulminating purpura. This disease is caused by different serogroups, A, B, C, Y and W-135 being the most prevalent. Over time they have undergone epidemiological changes in different regions of the world. There is scant information in our country concerning both the carrier and the invading forms; however, it has been proven in some Mexican states that the incidence of carrier status and of invading forms is signifcant. Accordingly, the possibilities of invading and secondary cases derived from the carrier and through contact with invading forms are feasible. Therefore, increasing the epidemiological surveillance and determining the actual burden of meningococcal disease is required. As far as preventive measures are concerned, prophylaxis of contacts with the index case and vaccination to control outbreaks or in high-risk specific cases is recommended. It would be reasonable as well to establish the indications of the vaccines available in our country.

Invasive pneumococcal disease in a third level pediatric hospital in Mexico City: epidemiology and mortality risk factors.

OBJECTIVE: To assess the epidemiologic characteristics of invasive pneumococcal diseases (IPD) among a population in a pediatric hospital in Mexico City and analyze mortality-related risk factors, serotype distribution and antibiotic susceptibility related to S.pneumoniae. MATERIAL AND METHODS: We performed a retrospective review of IPD cases at a third level pediatric hospital between 1997-2004. RESULTS: A total of 156 patients were included. The mortality rate was 27.5% and was associated with six pneumococcal serotypes: 14, 6B, 23F, 6A, 19F and 19A. There was no relationship between mortality and antimicrobial susceptibility pattern. A total of 28.2% of isolates were resistant to penicillin and 24.6% were resistant to cefotaxime. A statistically significant relationship was observed between mortality and previous underlying disease (CI 95%; 2.5-18.3; p< 0.05) using a multivariate logistic regression model. CONCLUSIONS: Our outcomes show that IPD mortality in our population is closely related to underlying disease and to six serotypes, five of which are included in the 7-valent pneumococcal conjugate vaccine.

Invasive pneumococcal disease in a third level pediatric hospital in Mexico City: epidemiology and mortality risk factors / Enfermedad neumocócica invasora en un hospital pediátrico de tercer nivel en la Ciudad de México: características epidemiológicas y factores de riesgo asociados con mortalidad

Objective. To assess the epidemiologic characteristics of invasive pneumococcal diseases (IPD) among a population in a pediatric hospital in Mexico City and analyze mortality-related risk factors, serotype distribution and antibiotic susceptibility related to S.pneumoniae. Material and Methods. We performed a retrospective review of IPD cases at a third level pediatric hospital between 1997-2004. Results. A total of 156 patients were included. The mortality rate was 27.5 percent and was associated with six pneumococcal serotypes: 14, 6B, 23F, 6A, 19F and 19A. There was no relationship between mortality and antimicrobial susceptibility pattern. A total of 28.2 percent of isolates were resistant to penicillin and 24.6 percent were resistant to cefotaxime. A statistically significant relationship was observed between mortality and previous underlying disease (CI 95 percent; 2.5-18.3; p< 0.05) using a multivariate logistic regression model. Conclusions. Our outcomes show that IPD mortality in our population is closely related to underlying disease and to six serotypes, five of which are included in the 7-valent pneumococcal conjugate vaccine.

Objetivo. Conocer la epidemiología de la enfermedad neumocócica invasora (ENI) en un hospital pediátrico y analizar los factores de riesgo relacionados con la mortalidad, la distribución de serotipos y el patrón de susceptibilidad de S. pneumoniae. Material y métodos. Revisión retrospectiva de los casos de ENI en un hospital pediátrico de tercer nivel, entre 1997 y 2004. Resultados. En 156 pacientes la mortalidad fue de 27.5 por ciento. Los serotipos de neumococo más frecuentemente relacionados con la mortalidad fueron: 14, 6B, 23F, 6A, 19F y 19A; no hubo relación de mortalidad con la resistencia a antibióticos. El 28.2 por ciento mostró resistencia a penicilina y 24.6 por ciento a cefotaxima. A través del modelo multivariado, se encontró una relación estadísticamente significativa entre la mortalidad y enfermedad previa (IC 95 por ciento; 2.5-18.3; p<0.05). Conclusiones. La mortalidad asociada a la ENI tuvo relación significativa con antecedente de una enfermedad previa y con seis serotipos, cinco incluidos en la vacuna neumocócica conjugada 7-valente.

[Streptococcus pneumoniae serotype replacement in nasopharyngeal colonization in children vaccinated with PCV7 in Mexico]. / Reemplazo de serotipos de Streptococcus pneumoniae en niños con vacuna conjugada antineumocóccica 7V en México.

OBJECTIVE: To assess the impact of pneumococcal conjugate vaccine (PCV7) immunization on pneumococcal nasopharyngeal colonization with S. pneumoniae (SPN). MATERIAL AND METHODS: We studied two groups with different vaccination schedules, group I (2-6 months of age) 3+1 and group II (7 -11 months) 2+1, with a booster at 15 months. Nasopharyngeal cultures were obtained before administering each vaccination dose and after booster. Paired and global analyses were carried out of the proportions of children colonized by SPN, vaccine serotype, no vaccine serotype and resistance to penicillin. RESULTS: A total of 183 children were enrolled; 93 in group I and 90 in group II. In group I, there was a decrease in vaccine serotypes in the third sample. In group II, there was an increase in non-vaccine serotypes and a decrease in vaccine serotypes before booster. Both groups showed a trend toward decreased resistance to penicillin. CONCLUSION: PCV7 caused serotype replacement in nasopharyngeal colonization before the booster.

Reemplazo de serotipos de Streptococcus pneumoniae en niños con vacuna conjugada antineumocóccica 7V en México / Streptococcus pneumoniae serotype replacement in nasopharyngeal colonization in children vaccinated with PCV7 in Mexico

OBJETIVO: Evaluar el efecto de la inmunización con vacuna neumocóccica conjugada 7 valente (VCN7), sobre la colonización nasofaríngea por S. pneumoniae (SPN). MATERIAL Y MÉTODOS: Se estudiaron dos grupos con diferente esquema de vacunación: grupo I (2-6 meses de edad) 3+1, grupo II (7-11 meses) 2+1, con refuerzo a los 15 meses de edad. Se realizaron cultivos nasofaríngeos antes de cada inmunización y posterior al refuerzo; se analizó de forma global y pareada las proporciones de los niños colonizados por SPN, serotipos vacunales, no vacunales y resistencia a la penicilina. RESULTADOS: Se incluyeron 183 niños; 93 en el grupo I y 90 en el grupo II. En el grupo I disminuyeron los serotipos vacunales en la 3ª muestra. En el grupo II aumentaron los serotipos no vacunales y disminuyeron los serotipos vacunales antes del refuerzo. En ambos grupos hay una tendencia a disminuir la resistencia a penicilina. CONCLUSIÓN: La VCN7 ocasiona un reemplazo de serotipos en la colonización nasofaríngea antes del refuerzo.

OBJECTIVE: To assess the impact of pneumococcal conjugate vaccine (PCV7) immunization on pneumococcal nasopharyngeal colonization with S. pneumoniae (SPN). MATERIAL AND METHODS: We studied two groups with different vaccination schedules, group I (2-6 months of age) 3+1 and group II (7 -11 months) 2+1, with a booster at 15 months. Nasopharyngeal cultures were obtained before administering each vaccination dose and after booster. Paired and global analyses were carried out of the proportions of children colonized by SPN, vaccine serotype, no vaccine serotype and resistance to penicillin. RESULTS: A total of 183 children were enrolled; 93 in group I and 90 in group II. In group I, there was a decrease in vaccine serotypes in the third sample. In group II, there was an increase in non-vaccine serotypes and a decrease in vaccine serotypes before booster. Both groups showed a trend toward decreased resistance to penicillin. CONCLUSION: PCV7 caused serotype replacement in nasopharyngeal colonization before the booster.

Prevalence of Neisseria meningitidis carriers in children under five years of age and teenagers in certain populations of Mexico City.

OBJECTIVE: To carry out a pilot study to discover the frequency of colonization in healthy children under five years old and teenagers, as well as the distribution of the different N. meningitidis serogroups isolated from nasopharyngeal samples collected from the population under study. MATERIAL AND METHODS: The population included youth between 15 and 19 years old living in social rehabilitation centers (SRC) and university teenagers (UT) as well as children under the age of five attending day care centers (DCC) in Mexico City. Nasopharyngeal exudates were processed using standard microbiological techniques in order to identify Nm, the serogroup, type and subtype of these isolates. RESULTS: A total of 2 310 samples (774 SRC, 800 UT and 736 DCC) were taken. Total prevalence of Nm was 1.6 per cent. In teenagers living in SRC the prevalence was 2.9%. The most frequent serogroups were Y (29.7%), C (24.3%) and B (10.8%). CONCLUSIONS: The prevalence of carriers in the study environment was significant (1.6%) and similar to countries in which the invasive illness is much more frequent.

Prevalence of Neisseria meningitidis carriers in children under five years of age and teenagers in certain populations of Mexico City / Prevalencia de portadores de Neisseria meningitidis en niños menores de cinco años de edad y adolescentes en determinadas poblaciones de la Ciudad de México

OBJECTIVE: To carry out a pilot study to discover the frequency of colonization in healthy children under five years old and teenagers, as well as the distribution of the different N. meningitidis serogroups isolated from nasopharyngeal samples collected from the population under study. MATERIAL AND METHODS: The population included youth between 15 and 19 years old living in social rehabilitation centers (SRC) and university teenagers (UT) as well as children under the age of five attending day care centers (DCC) in Mexico City. Nasopharyngeal exudates were processed using standard microbiological techniques in order to identify Nm, the serogroup, type and subtype of these isolates. RESULTS: A total of 2 310 samples (774 SRC, 800 UT and 736 DCC) were taken. Total prevalence of Nm was 1.6 per cent. In teenagers living in SRC the prevalence was 2.9 percent. The most frequent serogroups were Y (29.7 percent), C (24.3 percent) and B (10.8 percent). CONCLUSIONS: The prevalence of carriers in the study environment was significant (1.6 percent) and similar to countries in which the invasive illness is much more frequent.

OBJETIVO: Realizar un estudio piloto que permita conocer la frecuencia de colonización en niños sanos menores de cinco años y adolescentes, así como la distribución de serogrupos de los aislamientos de Neisseria meningitidis (Nm) obtenidos de la nasofaringe de la población estudiada. MATERIAL Y MÉTODOS: Se incluyeron, jóvenes entre los 15 y 19 años de edad, de centros de readaptación social (CRS) y adolescentes universitarios (AU), así como niños menores de cinco años que asisten a estancias infantiles (EI) en la Ciudad de México. Se tomaron exudados nasofaríngeos y fueron procesados, usando las técnicas microbiológicas clásicas, para identificar Nm, serogrupo, tipo y subtipo de estos aislamientos. RESULTADOS: Se incluyeron un total de 2310 muestras (774 CRS, 800 AU y 736 EI). La prevalencia total de Nm fue 1.6 por ciento y en los adolescentes de CRS fue 2.9 por ciento. Los serogrupos más frecuentes son; Y (29.7 por ciento), C (24.3 por ciento) y B (10.8 por ciento). CONCLUSIÓN: La prevalencia de portadores en nuestro medio fue significativa (1.6 por ciento) y similar a los países en los que la enfermedad invasiva es mucho más frecuente.

Streptococcus pneumoniae isolates in healthy children attending day-care centers in 12 states in Mexico.

OBJECTIVE: The aim of this study was to determine the prevalence of asymptomatic nasopharyngeal carriage of Streptococcus pneumoniae, which is a major factor in the transmission of this bacterium. MATERIAL AND METHODS: Nasopharyngeal cultures were performed on children attending 32 day-care centers in 12 states in Mexico. RESULTS: Streptococcus pneumoniae was isolated from the nasopharynx of 829 out of 2,777(29.9%) subjects aged two months to six years. All children lived in urban areas and 80% spent more than six hours daily in a day-care center. Streptococcus pneumoniae serotypes most frequently identified were: 19F (23%), 6B (15.6%), 23F (11.2%) and 6A (14.9%). Thirty-six percent of the isolates were susceptible to penicillin. CONCLUSIONS: Serotype distribution suggests the possible benefits that could be obtained from the heptavalent pneumococcal conjugate vaccine.

Streptococcus pneumoniae isolates in healthy children attending day-care centers in 12 states in Mexico

OBJECTIVE: The aim of this study was to determine the prevalence of asymptomatic nasopharyngeal carriage of Streptococcus pneumoniae, which is a major factor in the transmission of this bacterium. MATERIAL AND METHODS: Nasopharyngeal cultures were performed on children attending 32 day-care centers in 12 states in Mexico. RESULTS: Streptococcus pneumoniae was isolated from the nasopharynx of 829 out of 2 777(29.9 percent) subjects aged two months to six years. All children lived in urban areas and 80 percent spent more than six hours daily in a day-care center. Streptococcus pneumoniae serotypes most frequently identified were: 19F (23 percent), 6B (15.6 percent), 23F (11.2 percent) and 6A (14.9 percent). Thirty-six percent of the isolates were susceptible to penicillin. CONCLUSIONS: Serotype distribution suggests the possible benefits that could be obtained from the heptavalent pneumococcal conjugate vaccine.

OBJETIVO: La intención de este estudio fue determinar la prevalencia de portadores nasofaríngeos asintomáticos de Streptococcus pneumoniae, el cual es el principal factor en la transmisión de esta bacteria. MATERIAL Y MÉTODOS: Los cultivos nasofaríngeos fueron realizados en niños que asisten a 32 estancias infantiles en 12 estados de México. RESULTADOS: Streptococcus pneumoniae fue aislado de la nasofaringe de 829 (29.9 por ciento) niños de los 2 777 incluidos en el estudio con un rango de edad de 2 meses a 6 años. Todos los niños vivían en áreas urbanas y 80 por ciento permanecían más de seis horas diarias en la estancia infantil. Los serotipos de Streptococcus pneumoniae más frecuentemente identificados fueron: 19F (23 por ciento), 6B (15.6 por ciento), 23F (11.2 por ciento) y 6 A (14.9 por ciento). Treinta y seis por ciento de los aislamientos fueron susceptibles a penicilina. CONCLUSIONES: La distribución de serotipos nos da una idea de los posibles beneficios que podrían obtenerse de la vacuna neumocóccica conjugada heptavalente.

Occurrence of intracerebral aneurysm in an HIV-infected child: a case report.

A 12-year-old female diagnosed with human immunodeficiency virus infection at age 1 was admitted to our hospital with complaints of headache, left hemiparesis, and blurry vision. On admission, her CD4+ count was 97 cells/mm(3) (13%) and her viral load 44,783 ribonucleic acid copies/mL. Treatment had been initiated 3 months before admission with lopinavir/ritonavir, lamivudine, and stavudine. A computed tomographic scan and magnetic resonance imaging of the head revealed an aneurysm of the right middle cerebral artery. A head angiographic scan was consistent with intracranial arteritis. Six months after the initiation of antiretroviral therapy, her CD4+ cell count was 226 cells/mm(3) (16%) and her viral load was undetectable (less than 50 copies ribonucleic acid/mL). Magnetic resonance angiography of the head performed 15 months after the diagnosis demonstrated resolution of the aneurysm and the intracranial arteritis. This case highlights the association of human immunodeficiency virus infection with the occurrence of intracerebral aneurysms in the context of human immunodeficiency virus-vasculopathy, as well as its improvement with highly active antiretroviral therapy.

Successful treatment of a primary cutaneous zygomycosis caused by Absidia corymbifera in a premature newborn.

Mucormycosis (zygomycosis) normally occurs among individuals with predisposing factors such as prematurity, use of broad spectrum antibiotics, metabolic acidosis or advanced stages of immunosuppression. There have been reports of sporadic cases of cutaneous mucormycosis related to predisposing skin lesions and contact with contaminated material such as adhesive bandages and tongue depressors placed close to intravenous catheter insertion sites. We report successful treatment of a case of Absidia corymbifera infection with the combination of amphotericin B and surgical debridement of the affected area.

[Pneumonia due to Pneumocystis carinii in HIV-infected children]. / Neumonía por Pneumocystis carinii en niños infectados por el virus de inmunodeficiencia humana (VIH).

Introduction of new antiretroviral agents and development of new prophylaxis schedules against opportunistic microorganisms have allowed increase in survival as well as better quality of life in HIV-infected patients. These new treatment schedules have changed the epidemiology of opportunistic infections that previous to use of highly active antiretroviral therapy (HAART), formerly occurred with high frequency in HIV-infected children. Specifically, pneumonia due to Pneumocystis carinii formerly occurred in 12 to 80% of these patients and was associated with high mortality. Currently, with use of combined antiretroviral therapy (ART) and prophylactic treatments important reduction of PCP has been observed. However, despite these benefits ART is not yet available for many patients from several developing countries who are at risk for opportunistic infections, mainly due to Pneumocystis carinii, which can affect life expectancy. Therefore, the purpose of this paper was a review of epidemiologic, clinical, and therapeutic characteristics of P. carinii pneumonia in HIV-infected children.

Neumonía por Pneumocystis carinii en niños infectados por el virus de inmunodeficiencia humana (VIH) / Pneumonia Due to Pneumocystis carinii in HIV-Infected Children

La introducción de nuevos agentes antirretrovirales y el desarrollo de nuevos esquemas de profilaxis antimicrobiana contra agentes oportunistas, ha conducido a una mejor calidad de vida en los pacientes infectados por el virus de la inmunodeficiencia humana (VIH). Estos nuevos esquemas de tratamiento han cambiado la epidemiología de las infecciones oportunistas que, previo al uso de terapia antirretroviral (AR V) altamente activa, se presentaban con una elevada frecuencia en los niños infectados por el VIH. Específicamente, la neumonía por Pneumocystis carinii (PCP) ocurría en 12 al 40% de estos pacientes y estaba asociada con una elevada mortalidad. Actualmente, el uso de la terapia antirretroviral combinada y la administración de esquemas de profilaxis han resultado en una disminución importante en los casos de PCP. Sin embargo, en países en vías de desarrollo como el nuestro, la terapia altamente activa y la administración de estas profilaxis no están al alcance de todos los pacientes, por lo se encuentran en alto riesgo de presentar infecciones oportunistas, sobre todo producidas por Pneumocystis carinii, las cuales pueden acortar y afectar notablemente su supervivencia. El propósito de este articulo es hacer una revisión de la neumonía debida al Pneumocystis carinii, con especial énfasis, en las características epidemiológicas, clínicas y terapéuticas de la enfermedad en niños con VIH/SIDA.

Introduction of new antiretroviral agents and development of new prophylaxis schedules against opportunistic microorganisms have allowed increase in survival as well as better quality of life in HIV-infected patients. These new treatment schedules have changed the epidemiology of opportunistic infections that previous to use of highly active antiretroviral therapy (HAART), fomerly occurred with high frequency in HIV-infected children. Specifically, pneumonia due to Pneumocystis carinii formerly occurred in 12 to 80% of these patients and was associated with high mortality. Currently, with use of combined antiretroviral therapy (ART) and prophylactic treatments important reduction of PCP has been observed. However, despite these benefits ART is not yet available for many patients from several developing countries who are at risk for opportunistic infections, mainly due to Pneumocystis carinii. which can affect life expectancy. Therefore, the purpose of this paper was a review of epidemiologic, clinical, and therapeutic characteristics of P. carinii pneumonia in HIV-infected children.