Explorando la Empatía de Estudiantes de primer semestre de Enfermería mediante el Empathy Quotient (EQ) / Exploring the Empathy of Nursing First Semester Students Using the Empathy Quotient (EQ)

Introducción: La empatía ya sea considerada como una dimensión o una competencia, es crucial para el desarrollo de nuestra especie social, especialmente en una situación tan particular como el cuidado de otros. Objetivo: Determinar el cociente de empatía de los estudiantes de primer semestre de Enfermería de la Universidad Cooperativa de Colombia sede Bucaramanga. Materiales y Métodos: Se analizó el cociente de empatía mediante el test EQ de Baron-Cohen y Wheelwright en la totalidad de estudiantes del primer semestre (N: 100). Se determinó la relación con las variables sexo, edad, estrato social y procedencia, mediante pruebas de t y de F, así como ANOVA y Kruskal-Wallis. Resultados: No se encontraron diferencias estadísticas entre los cocientes de empatía de los sexos, edad, estrato social o procedencia, pero sí variaciones en la distribución de los datos. Se determinó una relación negativa entre la edad y el estrato social con los cocientes de empatía. Conclución: La media del cociente de empatía de la población de estudiantes de enfermería de primer semestre fue de 40,3 ubicándola en una posición media, el grupo de estudio fue bastante heterogéneo, con un desarrollo de empatía bajo a medio. Se hace necesario generar estrategias a lo largo de la carrera profesional para el desarrollo de la empatía en esta población de estudiantes, ya que la gran mayoría obtendrá su título profesional antes de alcanzar la madurez cerebral.

Introduction:Empathy either considered as a dimension or a competence is crucial for the development of our social species, particularly in a situation as special as the care of others. Objective: To determine the quotient of empathy of the first semester students of nursing at the Universidad Cooperativa de Colombia hosts Bucaramanga and its relations with the variables sex, age, social condition and city of origin. Materials and Methods: We analyzed the quotient of empathy using the EQ test Baron-Cohen and Wheelwright in all students in the first semester (N: 100). The relationship with the variables sex, age, social stratum and origin were determined by t test and F test, as well as ANOVA and Kruskal-Wallis test. Results:No statistical differences were found between the quotients of empathy of the sexes, age, social condition or city of origin, but variations in the distribution of the data were observed. Was determined a negative relationship between age and social condition with the quotients of empathy. Conclusions: The mean of the quotient of empathy of the population of nursing students from first semester was of 40,3 locating it in a middle position, the study group was quite heterogeneous, with a development low to medium of empathy. Strategies are necessary throughout his professional career for the development of empathy in this population of students since the vast majority will get your professional degree before reaching the brain maturity.

Introdução: A empatia, seja considerada uma dimensão ou uma competência, é crucial para o desenvolvimento da nossa espécie social, especialmente numa situação tão particular como a de cuidar. Objetivo: Determinar o quociente de empatia dos alunos do primeiro semestre de enfermagem da Universidade Cooperativa da Colômbia, campus de Bucaramanga, e suas relações com as variáveis sexo, idade, condição social e procedência. Materiais e Métodos: O quociente de empatia foi analisado pelo teste Baron-Cohen e Wheelwright EQ em todos os alunos do primeiro semestre (N: 100). A relação com as variáveis sexo, idade, estrato social e procedência foi determinada pelos testes t e F, além de ANOVA e Kruskal-Wallis, além da Análise Canônica (AC). Resultados: Não foram encontradas diferenças estatísticas entre os quocientes de empatia dos sexos, idade, estrato social ou origem, mas houve variações na distribuição dos dados. Uma relação negativa entre idade e estrato social foi determinada com os quocientes de empatia. Conclusões: O quociente médio de empatia da população de estudantes de enfermagem do primeiro semestre foi de 40,3 colocando-o em uma posição média, que torna o grupo bastante heterogêneo, com baixo desenvolvimento de empatia para médio. Estratégias são necessárias ao longo da carreira profissional para o desenvolvimento da empatia nessa população de alunos, uma vez que a grande maioria obterá o título profissional antes de atingir a maturidade cerebral.

Assessment of Personal Exposure to Particulate Air Pollution in Different Microenvironments and Traveling by Several Modes of Transportation in Bogotá, Colombia: Protocol for a Mixed Methods Study (ITHACA).

BACKGROUND: Air pollution in most countries exceeds the levels recommended by the World Health Organization, causing up to one-third of deaths due to noncommunicable diseases. Fine particulate matter (PM2.5) and black carbon (BC) from mobile sources are the main contaminants. OBJECTIVE: The aim of this study is to assess the relationship of exposure to air pollutants (PM2.5 and BC) in microenvironments according to respiratory health and physical activity in users traveling by different types of transportation in Bogotá, Colombia. METHODS: A mixed methods study based on a convergent parallel design will be performed with workers and students. The sample will include 350 healthy transport users traveling by different urban transportation modes in three main routes in Bogotá. The study is broken down into two components: (1) a descriptive qualitative component focused on assessing the individual perception of air pollution using semistructured interviews; and (2) a cross-sectional study measuring the individual exposure to PM2.5 and BC using portable instruments (DustTrak and microAeth, respectively), pulmonary function by spirometry, and physical activity with accelerometry. The analysis will include concurrent triangulation and logistic regression. RESULTS: The findings will be useful for the conception, design, and decision-making process in the sectors of health and mobility from public, academy, and private perspectives. This study includes personal measurements of PM2.5 and BC during typical trips in the city to assess the exposure to these contaminants in the major roadways in real time. The study further compares the performance of two different lung tests to identify possible short-term respiratory effects. As a limitation, the protocol will include participants from different institutions in the city, which are not necessarily representative of all healthy populations in Bogotá. In this sense, it is not possible to draw causation conclusions. Moreover, a convergent parallel design could be especially problematic concerning integration because such a design often lacks a clear plan for making a connection between the two sets of results, which may not be well connected. Nevertheless, this study adopts a procedure for how to integrate qualitative and quantitative data in the interpretation of the results and a multilevel regression. The time that participants must live in the city will be considered; this will be controlled in the stratified analysis. Another limitation is the wide age range and working status of the participants. Regional pollution levels and episodes (PM2.5) will be handled as confounding variables. The study is currently in the enrollment phase of the participants. Measurements have been made on 300 participants. Pandemic conditions affected the study schedule; however, the results are likely to be obtained by late 2022. CONCLUSIONS: This study investigates the exposure to air pollutants in microenvironments in Bogotá, Colombia. To our knowledge, this is the first mixed methods study focusing on PM2.5, BC, and respiratory health effects in a city over 2 meters above sea level. This study will provide an integration of air pollution exposure variables and respiratory health effects in different microenvironments. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): PRR1-10.2196/25690.

SARS-CoV-2 and RT-PCR in asymptomatic patients: Results of a cohort of workers at El Dorado International Airport in Bogotá, 2020 / [SARS-CoV-2 y RT-PCR en pacientes asintomáticos: resultados de una cohorte de trabajadores del Aeropuerto Internacional El Dorado de Bogotá, 2020].

Introduction: The 2019 coronavirus pandemic (COVID-19) has caused around 25 million cases worldwide. Asymptomatic patients have been described as potential sources of transmission. However, there are difficulties to detect them and to establish their role in the dynamics of virus transmission, which hinders the implementation of prevention strategies. Objective: To describe the behavior of asymptomatic SARS-CoV-2 virus infection in a cohort of workers at the El Dorado "Luis Carlos Galán Sarmiento" International Airport in Bogotá, Colombia. Materials and methods: A prospective cohort of 212 workers from the El Dorado airport was designed. The follow-up began in June, 2020. A survey was used to characterize health and work conditions. Every 21 day, a nasopharyngeal swab was taken to identify the presence of SARS-CoV-2 using RT-PCR. We analyzed the behavior of the cycle threshold (ORF1ab and N genes) according to the day of follow-up. Results: In the first three follow-ups of the cohort, we found an incidence of SARS-CoV-2 infection of 16.51%. The proportion of positive contacts was 14.08%. The median threshold for cycle threshold was 33.53. Conclusion: We characterized the asymptomatic SARS-CoV-2 infection in a cohort of workers. The identification of asymptomatic infected persons continues to be a challenge for epidemiological surveillance systems.

Introducción. La pandemia de COVID-19 ha ocasionado cerca de 25 millones de casos en el mundo. Se ha descrito que los pacientes asintomáticos pueden ser fuentes de transmisión. Sin embargo, es difícil detectarlos y no es claro su papel en la dinámica de transmisión del virus, lo que obstaculiza la implementación de estrategias para la prevención. Objetivo. Describir el comportamiento de la infección asintomática por SARS-CoV-2 en una cohorte de trabajadores del Aeropuerto Internacional El Dorado "Luis Carlos Galán Sarmiento" de Bogotá, Colombia. Materiales y métodos. Se diseñó una cohorte prospectiva de trabajadores del Aeropuerto El Dorado. El seguimiento se inició en junio de 2020 con una encuesta a cada trabajador para caracterizar sus condiciones de salud y trabajo. Cada 21 días se tomó una muestra de hisopado nasofaríngeo para detectar la presencia del SARS-CoV-2 mediante reacción en cadena de la polimerasa con transcriptasa inversa (RT-PCR). Se analizó el comportamiento del umbral del ciclo (cycle threshold) de los genes ORF1ab y N según el día de seguimiento. Resultados. En los primeros tres seguimientos de la cohorte se encontró una incidencia de la infección por SARS-CoV-2 del 16,51 %. La proporción de contactos positivos fue del 14,08 %. La mediana del umbral del ciclo fue de 33,53. Conclusión. Se determinaron las características de la infección asintomática por el SARSCoV-2 en una cohorte de trabajadores. La detección de infectados asintomáticos sigue siendo un reto para los sistemas de vigilancia epidemiológica.

SARS-CoV-2 y RT-PCR en pacientes asintomáticos: resultados de una cohorte de trabajadores del Aeropuerto Internacional El Dorado de Bogotá, 2020 / SARS-CoV-2 and RT-PCR in asymptomatic patients: Results of a cohort of workers at El Dorado International Airport in Bogotá, 2020

Introducción. La pandemia de COVID-19 ha ocasionado cerca de 25 millones de casos en el mundo. Se ha descrito que los pacientes asintomáticos pueden ser fuentes de transmisión. Sin embargo, es difícil detectarlos y no es claro su papel en la dinámica de transmisión del virus, lo que obstaculiza la implementación de estrategias para la prevención. Objetivo. Describir el comportamiento de la infección asintomática por SARS-CoV-2 en una cohorte de trabajadores del Aeropuerto Internacional El Dorado "Luis Carlos Galán Sarmiento" de Bogotá, Colombia. Materiales y métodos. Se diseñó una cohorte prospectiva de trabajadores del Aeropuerto El Dorado. El seguimiento se inició en junio de 2020 con una encuesta a cada trabajador para caracterizar sus condiciones de salud y trabajo. Cada 21 días se tomó una muestra de hisopado nasofaríngeo para detectar la presencia del SARS-CoV-2 mediante reacción en cadena de la polimerasa con transcriptasa inversa (RT-PCR). Se analizó el comportamiento del umbral del ciclo (cycle threshold) de los genes ORFlab y N según el día de seguimiento. Resultados. En los primeros tres seguimientos de la cohorte se encontró una incidencia de la infección por SARS-CoV-2 del 16,51 %. La proporción de contactos positivos fue del 14,08 %. La mediana del umbral del ciclo fue de 33,53. Conclusión. Se determinaron las características de la infección asintomática por el SARS-CoV-2 en una cohorte de trabajadores. La detección de infectados asintomáticos sigue siendo un reto para los sistemas de vigilancia epidemiológica.

Introduction: The 2019 coronavirus pandemic (COVID-19) has caused around 25 million cases worldwide. Asymptomatic patients have been described as potential sources of transmission. However, there are difficulties to detect them and to establish their role in the dynamics of virus transmission, which hinders the implementation of prevention strategies. Objective: To describe the behavior of asymptomatic SARS-CoV-2 virus infection in a cohort of workers at the El Dorado "Luis Carlos Galán Sarmiento" International Airport in Bogotá, Colombia. Materials and methods: A prospective cohort of 212 workers from the El Dorado airport was designed. The follow-up began in June, 2020. A survey was used to characterize health and work conditions. Every 21 day, a nasopharyngeal swab was taken to identify the presence of SARS-CoV-2 using RT-PCR. We analyzed the behavior of the cycle threshold (ORFlab and N genes) according to the day of follow-up. Results: In the first three follow-ups of the cohort, we found an incidence of SARS-CoV-2 infection of 16.51%. The proportion of positive contacts was 14.08%. The median threshold for cycle threshold was 33.53. Conclusion: We characterized the asymptomatic SARS-CoV-2 infection in a cohort of workers. The identification of asymptomatic infected persons continues to be a challenge for epidemiological surveillance systems.

Molecular characterization of Neisseria meningitidis isolates recovered from patients with invasive meningococcal disease in Colombia from 2013 to 2016.

BACKGROUND: Neisseria meningitidis is a significant cause of morbidity and mortality worldwide. Meningococcal isolates have a highly dynamic population structure and can be phenotypically and genetically differentiated into serogroups and clonal complexes. The aim of this study was to describe the phenotypic and genotypic characteristics of invasive isolates recovered in Colombia from 2013 to 2016. METHODOLOGY: A total of 193 invasive isolates were analyzed. Phenotypic and genotypic characteristics were determined by serotyping, antimicrobial susceptibility testing, pulsed-field gel electrophoresis (PFGE) and whole-genome sequencing. RESULTS: Based on the results, meningococcal serogroups C, B and Y were responsible for 47.9%, 41.7%, and 9.4% of cases, respectively, and the distribution of serogroups B and C changed over time. Fifteen clonal groups and 14 clonal complexes (cc) were identified by PFGE and genome sequencing. The main clonal group included serogroup B isolates with sequence type (ST)-9493 and its four single-locus variants, which has only been identified in Colombian isolates. The clonal population structure demonstrates that the isolates in this study mainly belong to four clonal complexes: ST-11 cc, ST-32 cc, ST-35 cc and ST-41/44 cc. Thirty-eight penA alleles were identified, but no correlation between MICs and specific sequences was observed. CONCLUSION: This study shows that most meningococcal isolates recovered from patients with invasive meningococcal disease in Colombia are strains associated with distinct globally disseminated hyperinvasive clones.

Oral health in adolescents with disabilities from centro de educación especial San Miguel, Guarambaré, Paraguay / Salud bucal en adolescentes con discapacidad del centro de educación especial San Miguel, de Guarambaré, Paraguay

ABSTRACT: Introduction: oral health in patients with disabilities represents a great challenge in dentistry, as motor, sensory, cognitive, behavioral, and emotional limitations influence oral hygiene, leading to the development of certain diseases in this population. The aim of the present study was to analyze the oral health conditions of school children with disabilities aged 12 to 18 years attending Centro de Educación Especial San Miguel, in the city of Guarambaré, in 2013. Methods: this was a descriptive cross-sectional study. A survey was applied to 20 schoolchildren who met the inclusion criteria. Oral health was assessed using the DMFT index, as well as the dental plaque, tartar, gingival indices and occlusal anomalies. Results: the DMFT index was 5.5 (SD = 4.38), dental plaque index was 1.15, tartar was 0.53 and gingival index was 0.68. There was malocclusion in 50% of cases, of which 35% were class II and 15% class III. Conclusions: the school children participating in this study do not enjoy good health conditions because of the high rate of tooth decay, high percentages of dental plaque, and a large percentage of preventive and restorative needs.

RESUMEN: Introducción: la salud bucal en pacientes con discapacidad representa un gran desafío en la odontología, pues las limitaciones motoras, sensoriales, cognitivas, conductuales y emocionales inciden en la higiene oral, lo cual lleva al desarrollo de ciertas enfermedades en esta población. El objetivo del presente estudio consistió en analizar el estado de salud bucal de escolares de 12 a 18 años con discapacidad, que asistieron al Centro de Educación Especial San Miguel, de la ciudad de Guarambaré, en el año 2013. Métodos: estudio descriptivo de corte transversal. Se realizó un censo en el que participaron 20 escolares que cumplían con los criterios de inclusión. La salud bucal se evaluó mediante los índices CPO-D, placa dental, sarro, gingival y anomalías de oclusión. Resultados: el índice CPO-D fue de 5,5 (DE = 4,38), el índice de placa dental fue de 1,15, el de sarro fue de 0,53 y el gingival de 0,68. Se presentó maloclusión en el 50%, de los cuales 35% correspondieron a la clase II y el 15% a la clase III. Conclusiones: no existen condiciones aceptables de salud bucal en los escolares de este estudio debido al elevado índice de caries, a los altos porcentajes de placa dental, y a un gran porcentaje de necesidades preventivas y restauradoras.

Frequency and molecular characterization of invasive isolates of Streptococcus pneumoniae serotypes 6C and 6D in Colombia / Frecuencia y caracterización molecular de aislamientos invasivos de Streptococcus pneumoniae serotipos 6C y 6D en Colombia

INTRODUCTION: Serogroup 6 of Streptococcus pneumoniae initially consisted of the 6A and 6B serotypes, but in recent years, the 6C and 6D serotypes were reported. The aim of this study was to determine the frequency and molecular characterization of invasive S. pneumoniae isolates serotypes 6C and 6D in Colombia, from 1994 to 2013. METHODOLOGY: All the isolates recovered during the surveillance from 1994 to 2013, and identified as 6A or 6B, were re-tested to detect the serotypes 6C and 6D. The serotyping was performed using the Quellung reaction and PCR. The susceptibility testing was performed on penicillin, erythromycin, ceftriaxone, trimethoprim/sulfamethoxazole, chloramphenicol, tetracycline and vancomycin. Molecular typing was performed using pulsed-field gel electrophoresis and multilocus sequence typing. RESULTS: From a total of 271 and 350 isolates serotyped previously as serotypes 6A and 6B, 61 (22.5%) and 15 (4.3%) were recognized as 6C and 6D, respectively. Isolates presented with low resistance to antimicrobials. Serotype 6C isolates were mainly associated with ST9007 (42.6%) and ST9008 (19.7%), and serotype 6D isolates with ST1135 (80%). CONCLUSION: This study showed the circulation of serotype 6C and 6D in Colombia between 1994 and 2013, information that is important to determine the dynamics of these recently described serotypes

INTRODUCCIÓN: El serogrupo 6 de Streptococcus pneumoniae estaba conformado inicialmente por los serotipos 6A y 6B, pero en los últimos años los serotipos adicionales 6C y 6D fueron reportados. El objetivo de este estudio fue determinar la frecuencia y la caracterización molecular de aislamientos invasivos de S.pneumoniae serotipos 6C y 6D en Colombia, desde 1994 a 2013. METODOLOGÍA: Todos los aislamientos recuperados durante la vigilancia 1994-2013 e identificados como 6A o 6B se analizaron para detectar los serotipos 6C y 6D. La serotipificación se realizó usando la reacción de Quellung y PCR. La prueba de sensibilidad se realizó a la penicilina, eritromicina, ceftriaxona, trimetoprim/sulfametoxazol, cloranfenicol, tetraciclina y vancomicina. La tipificación molecular se realizó mediante electroforesis en gel de campos pulsados y análisis de las secuencias multilocus. RESULTADOS: De un total de 271 y 350 aislamientos previamente identificados como serotipos 6A y 6B, 61 (22,5%) y 15 (4,3%) fueron reconocidos como 6C y 6D, respectivamente. Los aislamientos presentaron una baja resistencia a los antimicrobianos. Los aislamientos serotipo 6C se asociaron principalmente a los ST9007 (42,6%) y ST9008 (19,7%). El 80% de los aislamientos 6D se asociaron con ST 1135. CONCLUSIÓN: Este estudio demostró la circulación del serotipo 6C y 6D en Colombia desde 1994. La información es importante para determinar la dinámica de estos serotipos descritos recientemente

Frequency and molecular characterization of invasive isolates of Streptococcus pneumoniae serotypes 6C and 6D in Colombia.

INTRODUCTION: Serogroup 6 of Streptococcus pneumoniae initially consisted of the 6A and 6B serotypes, but in recent years, the 6C and 6D serotypes were reported. The aim of this study was to determine the frequency and molecular characterization of invasive S. pneumoniae isolates serotypes 6C and 6D in Colombia, from 1994 to 2013. METHODOLOGY: All the isolates recovered during the surveillance from 1994 to 2013, and identified as 6A or 6B, were re-tested to detect the serotypes 6C and 6D. The serotyping was performed using the Quellung reaction and PCR. The susceptibility testing was performed on penicillin, erythromycin, ceftriaxone, trimethoprim/sulfamethoxazole, chloramphenicol, tetracycline and vancomycin. Molecular typing was performed using pulsed-field gel electrophoresis and multilocus sequence typing. RESULTS: From a total of 271 and 350 isolates serotyped previously as serotypes 6A and 6B, 61 (22.5%) and 15 (4.3%) were recognized as 6C and 6D, respectively. Isolates presented with low resistance to antimicrobials. Serotype 6C isolates were mainly associated with ST9007 (42.6%) and ST9008 (19.7%), and serotype 6D isolates with ST1135 (80%). CONCLUSION: This study showed the circulation of serotype 6C and 6D in Colombia between 1994 and 2013, information that is important to determine the dynamics of these recently described serotypes.

Serotype and genotype distribution among invasive Streptococcus pneumoniae isolates in Colombia, 2005-2010.

In Colombia, a laboratory-based surveillance of invasive Streptococcus pneumoniae isolates as part of SIREVA II PAHO has been conducted since 1994. This study describes the serotype distribution, antimicrobial resistance, and genetic relationships of pneumococcal isolates recovered in Colombia from 2005 to 2010. In this study, demographic data of invasive S. pneumoniae isolates were analyzed, and antimicrobial susceptibility patterns were determined. Pulse field gel electrophoresis (n = 629) and multilocus sequence typing (n = 10) were used to determine genetic relationship of isolates with minimal inhibitory concentration to penicillin ≥0.125 µg/mL. A total of 1775 isolates of S. pneumoniae were obtained. Fifteen serotypes accounted for 80.7% of isolates. Serotype 14 (23.1%) was the most frequent in the general population. Penicillin resistance was 30.7% in meningitis and 9.0% in non-meningitis. Clones Spain(6B)ST90, Spain(9V)ST156, Spain(23F)ST81, and Colombia(23F)ST338 were associated to isolates. Additionally, serotype 6A isolates were associated with ST460 and ST473, and 19A isolates with ST276, ST320, and ST1118. In conclusion, the surveillance program provided updated information of trends in serotype distribution, antimicrobial resistance and the circulation of clones in invasive pneumococcal diseases. These results could be helpful to understand the epidemiology of S. pneumoniae in Colombia, and provide a baseline to measure the impact of vaccine introduction.

Characterization of Streptococcus pneumoniae invasive serotype 19A isolates recovered in Colombia.

The aim of this study was to determine the molecular characterization of invasive penicillin non-susceptible Streptococcus pneumoniae serotype 19A isolates, collected in Colombia between 1994 and 2012. A total of 115 isolates serotype 19A were analyzed. Genetic relationship of 80 isolates with minimal inhibitory concentration (MIC) to penicillin ≥0.125 µg/was determined by pulsed-field gel electrophoresis (PFGE) and selected strains were studied by multilocus sequence typing (MLST). Among the 115 isolates, resistance to penicillin in meningitis was 64.2%, in non-meningitis 32.2% were intermediate and 1.1% were high resistance. The most frequent sequence types were ST320 (33.7%), ST276 (21.5%), and ST1118 (11.2%). Five isolates were associated with the Spain(9V)-ST156 clone, and two isolates were related to Colombia(23F)-ST338 clone. S. pneumoniae serotype 19A increased in Colombia was associated with the spread of isolates genetically related to ST320 and ST276, and emergence of capsular variants of worldwide-disseminated clones.

Changes in Streptococcus pneumoniae serotype distribution in invasive disease and nasopharyngeal carriage after the heptavalent pneumococcal conjugate vaccine introduction in Bogotá, Colombia.

BACKGROUND: In Bogotá, the Heptavalent Conjugate Vaccine (PCV7) was introduced into childhood immunization schedule since 2009. The aim of this study was to assess the changes in serotype distribution and penicillin susceptibility of Streptococcus pneumoniae isolates recovered from nasopharyngeal samples and invasive disease among children living in Bogotá, before and after PCV7 introduction. METHODS: Nasopharyngeal swabs were collected from healthy children aged between 12 and 18 months of age before (years 2005-2006) and after (2011) PCV7 introduction. Identification of S. pneumoniae was performed by multiplex PCR. Serotype was determined by PCR and Quellung reaction. Susceptibility to penicillin, ceftriaxone, trimethoprim-sulfamethoxazole, chloramphenicol, tetracycline and erythromycin was evaluated. In addition, distribution of serotypes and antimicrobial susceptibility before and after vaccine introduction among invasive isolates recovered from children ≤2 years old living in Bogotá was analyzed. RESULTS: Prevalence of pneumococcal nasopharyngeal carriage declined from 55.7% (137/246) in unvaccinated to 44.2% (87/197) (p=0.01) in vaccinated children. The proportion of children carrying PCV7 serotypes decreased from 23.6% (58/246) to 7.6% (15/197) (p<0.001). The decrease was counterbalanced by an increase in the proportion of non-PCV7 serotypes. The most prevalent among emerging serotypes were 15A, 15B, 15C, 11A and 35B. Among IPD isolates, PCV7 serotypes decreased from 69.1% (235/340) in 2005/2009 to 38.0% (32/84) in 2010/2011 (p<0.001). The increase of non-PCV7 serotypes was significant. Resistance to penicillin among invasive isolates recovered from meningitis decreased from 41.1% (30/73) in the pre-vaccine period to 14.2% (2/14) in post-vaccine period (p=0.02). CONCLUSIONS: A decrease in the prevalence of pneumococcal nasopharyngeal carriage following the introduction of PCV7 vaccine, have been overshadowed by an important surge in the prevalence of non-PCV7 serotypes. Systematic surveillance combining nasopharyngeal carriage surveys and IPD detection could help in evaluating the impact of conjugate vaccines.

Identificación de Haemophilus influenzae, Streptococcus pneumoniae y Neisseria meningitidis por reacción en cadena de la polimerasa / Identification of Haemophilus influenzae, Streptococcus pneumoniae and Neisseria meningitidis by polymerase chain reaction

Introducción. Haemophilus influenzae, Streptococcus pneumoniae y Neisseria meningitidis son los principales patógenos humanos causantes de meningitis. Objetivo. Se evaluaron los iniciadores omp2, lytA y crgA en el desarrollo de una reacción en cadena de la polimerasa múltiple, para la identificación simultánea de los tres principales microorganismos responsables de la meningitis bacteriana. Materiales y métodos. Se evaluaron en un formato de PCR múltiple los iniciadores para la proteína de membrana externa ( omp2, 1.000 pb) de H. influenzae, la autolisina A ( LytA, 395 pb) de S. pneumoniae y el gen regulador de contacto A ( cgrA, 230 pb) de N. meningitidis y se determinó la sensibilidad y la especificidad de la técnica. Resultados. Se obtuvieron resultados reproducibles con una concentración de 50 nM de cada uno de los tres iniciadores y una temperatura de anillamiento de 57°C obteniendo una sensibilidad de 12,5 fg para H. influenzae y S. pnemoniae y de 3,12 fg para N. meningitidis. No se presentaron reacciones cruzadas con otros microorganismos causantes de meningitis o relacionados con los géneros. Conclusión. Los resultados de sensibilidad y especificidad sugieren que los iniciadores evaluados pueden ser utilizados para el desarrollo de una PCR en formato múltiple que permita la identificación de los tres principales patógenos causantes de meningitis.

Introduction: Haemophilus influenzae, Streptococcus pneumoniae and Neisseria meningitidis are the main human pathogens that cause meningitis. Objective: Primers omp2, lytA and crgA were evaluated with H. influenzae, S. pnumoniae and N. meningitidis DNA in a multiplex PCR, determining the sensitivity and the specificity of the technique. Materials and methods: Primers for H. influenzae outer membrane protein (omp2, 1000 pb), S. pneumoniae autolysin (lytA, 395 pb) and N. meningitidis, contact regulated gene (crgA, 230 pb) were evaluated in a multiplex PCR, determining the sensitivity and the specificity of the technique. Results: Reproducible results were obtained with 50 nM of each of the three primers and annealing temperature of 57oC in the multiplex PCR, obtaining a sensitivity of 12.5 fg for H. influenzae and S. pneumoniae and 3.12 fg for N. meningitidis. No cross reactions with other microorganisms agents of meningitis or related with the genera, appeared. Conclusions: The results for sensitivity and specificity suggest that the evaluated primers can be used for the development of a PCR in a multiplex format to the identification of the three main pathogens that cause meningitis.

[Identification of Haemophilus influenzae, Streptococcus pneumoniae and Neisseria meningitidis by polymerase chain reaction]. / Identificación de Haemophilus influenzae, Streptococcus pneumoniae y Neisseria meningitidis por reacción en cadena de la polimerasa.

INTRODUCTION: Haemophilus influenzae, Streptococcus pneumoniae and Neisseria meningitidis are the main human pathogens that cause meningitis. OBJECTIVE: Primers omp2, lytA and crgA were evaluated with H. influenzae, S. pnumoniae and N. meningitidis DNA in a multiplex PCR, determining the sensitivity and the specificity of the technique. MATERIALS AND METHODS: Primers for H. influenzae outer membrane protein (omp2, 1000 pb), S. pneumoniae autolysin (lytA, 395 pb) and N. meningitidis, contact regulated gene (crgA, 230 pb) were evaluated in a multiplex PCR, determining the sensitivity and the specificity of the technique. RESULTS: Reproducible results were obtained with 50 nM of each of the three primers and annealing temperature of 57 degrees C in the multiplex PCR, obtaining a sensitivity of 12.5 fg for H. influenzae and S. pneumoniae and 3.12 fg for N. meningitidis. No cross reactions with other microorganisms agents of meningitis or related with the genera, appeared. CONCLUSIONS: The results for sensitivity and specificity suggest that the evaluated primers can be used for the development of a PCR in a multiplex format to the identification of the three main pathogens that cause meningitis.