The Value of the Second QuantiFERON-TB Gold-Plus Antigen Tube at Diagnosis and at Treatment Completion in Spanish Children With Tuberculosis.

We studied 295 children (tuberculosis disease, n = 159; latent tuberculosis infection, n = 136) with positive QuantiFERON-TB Gold-Plus assay results. No significant differences between first and second antigen tube interferon-gamma responses were detected, irrespective of patient and disease characteristics at diagnosis. Of patients with a repeat assay after treatment completion (n = 65), only 16.9% converted to negative results.

Prevalence and Clinical Characteristics of Children With Nonsevere Tuberculosis in Spain.

BACKGROUND: To assess the prevalence and characteristics of nonsevere TB among children in Spain. It has been recently demonstrated that these children can be treated with a 4-month regimen instead of the classical 6-month treatment regimen, with the same effectivity and outcomes, decreasing toxicity and improving adherence. METHODS: We conducted a retrospective cohort study in a cohort of children ≤16 years of age with TB. Nonsevere TB cases included smear-negative children with respiratory TB confined to 1 lobe, with no significant airway obstruction, no complex pleural effusion, no cavities and no signs of miliary disease, or with peripheral lymph-node disease. The remaining children were considered to have severe TB. We estimated the prevalence of nonsevere TB and compared the clinical characteristics and outcomes between children with nonsevere and severe TB. RESULTS: A total of 780 patients were included [46.9% males, median age 5.5 years (IQR: 2.6-11.1)], 477 (61.1%) of whom had nonsevere TB. Nonsevere TB was less frequent in children <1 year (33% vs 67%; P < 0.001), and >14 years of age (35% vs 65%; P = 0.002), mostly diagnosed in contact tracing studies (60.4% vs 29.2%; P < 0.001) and more frequently asymptomatic (38.3% vs 17.7%; P < 0.001). TB confirmation in nonsevere disease was less frequent by culture (27.0% vs 57.1%; P < 0.001) and by molecular tests (18.2% vs 48.8%; P < 0.001). Sequelae were less frequent in children with nonsevere disease (1.7 vs 5.4%; P < 0.001). No child with nonsevere disease died. CONCLUSIONS: Two-thirds of children had nonsevere TB, mostly with benign clinical presentation and negative microbiologic results. In low-burden countries, most children with TB might benefit from short-course regimens.

Transient Viral Rebound in Children with Perinatally Acquired HIV-1 Induces a Unique Soluble Immunometabolic Signature Associated with Decreased CD4/CD8 Ratio.

BACKGROUND: To determine by multi-omic analysis changes in metabolites, lipids, and proteins as a consequence of transient viral rebound (tVR) in children with perinatally acquired HIV-1 (PHIV). METHODS: Plasma samples from children with PHIV and with tVR (first episode of transient RNA-HIV viral load >20 copies/ml followed by suppression) on the time-point immediately before (pre-tVR) and after (post-tVR) the tVR were assessed. Multi-omic analyses were performed using nLC-Orbitrap, GC-qTOF-MS, and LC-qTOF-MS. RESULTS: Comparing pre- and post-tVR time-points, HIV-1 children with tVR (n = 5) showed a trend to a decrease in ratio CD4/CD8 (p = 0.08) but no significant differences were observed in plasma metabolites, lipids, or proteins. Post-tVR condition was compared with a reference group of children with PHIV with persistent viral control (n = 9), paired by sex, age, and time under antiretroviral treatment. A total of 10 proteins, 8 metabolites, and 2 lipids showed significant differences (p < 0.05): serotransferrin, clusterin, kininogen-1, succinic acid, threonine, 2-hydroxyisovaleric acid, methionine, 2-hydroxyglutaric, triacylglyceride 50:0 (TG50:0), and diacylglyceride 34:1 (DG34:1) were upregulated while alpha-2-macroglobulin, apolipoprotein A-II, carboxylic ester hydrolase, apolipoprotein D, coagulation factor IX, peptidase inhibitor 16, SAA2-SAA4 readthrough, oleic acid, palmitoleic acid, and D-sucrose downregulated on post-tVR time-point compared to the reference group. Ratio CD4/CD8 correlated with apolipoprotein A-II, DG34:1, and methionine (p = 0.004; ρ = 0.71, p = 0.016; ρ = -0.63; and p = 0.032; ρ = -0.57, respectively). Nadir CD4+ correlated inversely with kininogen-1 (p = 0.022; ρ = -0.60) and positively with D-sucrose (p = 0.001; ρ = 0.77). CONCLUSIONS: tVR followed by suppression implies changes in soluble proteins, lipids, and metabolites that correlate with immunological parameters, mainly ratio CD4/CD8, that decreased after tVR. These distinct soluble biomarkers could be considered potential biomarkers of immune progression.

Performance of QuantiFERON-TB Gold Plus assays in paediatric tuberculosis: a multicentre PTBNET study.

RATIONALE: In 2016, a new interferon-gamma release assay (IGRA) was introduced, QuantiFERON-TB Gold Plus (QFT-Plus), claimed to have improved sensitivity in active tuberculosis (TB). OBJECTIVES: This study aimed to determine the performance of QFT-Plus, compared with previous generation IGRAs and the tuberculin skin test (TST), in children with TB in Europe. METHODS: Multicentre, ambispective cohort study within the Paediatric Tuberculosis Network European Trials Group (ptbnet), a dedicated paediatric TB research network comprising >300 members, capturing TB cases <18 years-of-age diagnosed between January 2009 and December 2019. MEASUREMENTS AND MAIN RESULTS: 1001 TB cases from 16 countries were included (mean age (IQR) 5.6 (2.4-12.1) years). QFT-Plus was performed in 358, QFT Gold in-Tube (QFT-GIT) in 600, T-SPOT.TB in 58 and TST in 636 cases. The overall test sensitivities were: QFT-Plus 83.8% (95% CI 80.2% to 87.8%), QFT-GIT 85.5% (95% CI 82.7% to 88.3%), T-SPOT.TB 77.6% (95% CI 66.9% to 88.3%) and TST (cut-off ≥10 mm) 83.3% (95% CI 83.3% to 86.2%). There was a trend for tests to have lower sensitivity in patients with miliary and/or central nervous system (CNS) TB (73.1%, 70.9%, 63.6% and 43.5%, respectively), and in immunocompromised patients (75.0%, 59.6%, 45.5% and 59.1%, respectively). CONCLUSIONS: The results indicate that the latest generation IGRA assay, QFT-Plus, does not perform better than previous generation IGRAs or the TST in children with TB disease. Overall, tests performed worse in CNS and miliary TB, and in immunocompromised children. None of the tests evaluated had sufficiently high sensitivity to be used as a rule-out test in children with suspected TB.

Performance of QuantiFERON-TB Gold Plus assays in children and adolescents at risk of tuberculosis: a cross-sectional multicentre study.

INTRODUCTION: The QuantiFERON-TB Gold Plus (QFT-Plus) assay, which features two antigen-stimulated tubes (TB1 and TB2) instead of a single tube used in previous-generation interferon-gamma release assays (IGRAs), was launched in 2016. Despite this, data regarding the assay's performance in the paediatric setting remain scarce. This study aimed to determine the performance of QFT-Plus in a large cohort of children and adolescents at risk of tuberculosis (TB) in a low-burden setting. METHODS: Cross-sectional, multicentre study at healthcare institutions participating in the Spanish Paediatric TB Research Network, including patients <18 years who had a QFT-Plus performed between September 2016 and June 2020. RESULTS: Of 1726 patients (52.8% male, median age: 8.4 years), 260 (15.1%) underwent testing during contact tracing, 288 (16.7%) on clinical/radiological suspicion of tuberculosis disease (TBD), 649 (37.6%) during new-entrant migrant screening and 529 (30.6%) prior to initiation of immunosuppressive treatment. Overall, the sensitivity of QFT-Plus for TBD (n=189) and for latent tuberculosis infection (LTBI, n=195) was 83.6% and 68.2%, respectively. The agreement between QFT-Plus TB1 and TB2 antigen tubes was excellent (98.9%, κ=0.961). Only five (2.5%) patients with TBD had discordance between TB1 and TB2 results (TB1+/TB2-, n=2; TB1-/TB2+, n=3). Indeterminate assay results (n=54, 3.1%) were associated with young age, lymphopenia and elevated C reactive protein concentrations. CONCLUSIONS: Our non-comparative study indicates that QFT-Plus does not have greater sensitivity than previous-generation IGRAs in children in both TBD and LTBI. In TBD, the addition of the second antigen tube, TB2, does not enhance the assay's performance substantially.

QuantiFERON-TB Gold Plus Assay Specificity in Children and Adolescents With Suspected Tuberculosis-A Multicenter Cross-sectional Study in Spain.

In this cross-sectional study of 284 children and adolescents with clinically or radiologically suspected tuberculosis in a low-endemic country, the QuantiFERON-TB Gold Plus assay specificity, sensitivity, positive predictive value and negative predictive value were 91.5%, 87.3%, 86.4%, and 91.2%, respectively. The specificity was higher than that observed in tuberculin skin tests performed simultaneously, but similar to previous-generation interferon-gamma release assays.

Interferon-Gamma Release Assays Differentiate between Mycobacterium avium Complex and Tuberculous Lymphadenitis in Children.

OBJECTIVES: To assess the performance of interferon-gamma release assays (IGRAs) in the differential diagnosis between Mycobacterium avium complex (MAC) and tuberculosis (TB) in children affected with subacute/chronic submandibular/cervical lymphadenitis. STUDY DESIGN: Multicenter observational study comparing children with microbiologically confirmed MAC lymphadenitis from the European NontuberculouS MycoBacterial Lymphadenitis in childrEn study with children with TB lymphadenitis from the Spanish Network for the Study of Pediatric TB database. RESULTS: Overall, 78 patients with MAC and 34 with TB lymphadenitis were included. Among MAC cases, 44 out of 74 (59.5%) had positive tuberculin skin test (TST) results at the 5-mm cut-off, compared with 32 out of 33 (97%) TB cases (P < .001); at the 10-mm cut-off TST results were positive in 23 out of 74 (31.1%) vs 26 out of 31 (83.9%), respectively (P < .001). IGRA results were positive in only 1 out of 32 (3.1%) patients with MAC who had undergone IGRA testing, compared with 21 out of 23 (91.3%) TB cases (P < .001). Agreement between TST and IGRA results was poor in MAC (23.3%; κ = 0.017), but good in TB cases (95.6%; κ = 0.646). IGRAs had a specificity of 96.9% (95% CI 84.3%-99.8%), positive predictive value of 95.4% (95% CI 78.2%-99.8%), and negative predictive value of 93.9% (95% CI 80.4%-98.9%) for TB lymphadenitis. CONCLUSIONS: In contrast to TST, IGRAs have high specificity, negative predictive value, and positive predictive value for TB lymphadenitis in children with subacute/chronic lymphadenopathy, and consequently can help to discriminate between TB and MAC disease. Therefore, IGRAs are useful tools in the diagnostic work-up of children with lymphadenopathy, particularly when culture and polymerase chain reaction results are negative.

Estudio retrospectivo de los pacientes con diagnóstico confirmado de tosferina que son atendidos en urgencias de un hospital de tercer nivel / Retrospective study of patients with a confirmed diagnosis of whooping cough treated in the emergency room of a tertiary hospital

INTRODUCCIÓN: se analizan las características clínicas, pruebas complementarias y tratamientos recibidos por los pacientes con diagnóstico de tosferina que son valorados en Urgencias de Pediatría. MATERIAL Y MÉTODOS: estudio descriptivo retrospectivo de los casos de tosferina que consultaron en Urgencias de Pediatría de un hospital de tercer nivel entre marzo de 2014 y octubre de 2017. RESULTADOS: se analizaron 89 casos (55% mujeres) con edad media de 1,67 ± 2,9 años. El 98,9% presentó tos, el 33% gallo inspiratorio y el 34,8% apneas. En el 64% de los casos había entorno epidémico de tos o tosferina. La media de visitas en urgencias durante el mismo proceso fue 1,4. Diagnósticos más frecuentes en la primera visita a urgencias: tos (36%), sospecha de tosferina (22,5%), infección respiratoria de vías altas (19,1%) y bronquiolitis (9%). Ingresaron 56 pacientes (62,9%), con una edad media de 0,38 ± 1,2 años. Se realizó cultivo para Bordetella en 88 casos (positivo para B. pertussis en 38 y B. parapertussis en tres) y reacción en cadena de la polimerasa en 73 (positivo para B. pertussis en 70 y B. parapertussis en tres). CONCLUSIONES: el diagnóstico de tosferina habitualmente es difícil, ya que la sintomatología inicialmente es inespecífica. El diagnóstico precoz es fundamental para iniciar un tratamiento inmediato y realizar una adecuada profilaxis de contactos

INTRODUCTION: the aim of the study was to analyse the clinical characteristics, diagnostic tests performed and treatment used in patients with pertussis evaluated in the paediatric emergency setting. MATERIAL AND METHODS: we conducted a retrospective descriptive study of patients with pertussis that sought care in the paediatric emergency department of a tertiary care hospital between March 2014 and October 2017. RESULTS: the sample included 89 patients with a mean age of 1.67 ± 2.9 years. Of the total, 98.9% presented with cough, 33% with inspiratory whoop and 34.8% with apnoea. Sixty-four percent of cases occurred in the context of an epidemic of cough or pertussis. The mean number of emergency visits made during a single episode of disease was 1.4. The most frequent diagnoses in the initial emergency visit were cough (36%), suspected pertussis (22.5%), upper respiratory tract infection (19.1%) and bronchiolitis (9%). Fifty-six patients were admitted to hospital (62.9%) with a mean age of 0.38 ± 1.2 years. Cultures for detection of Bordetella were performed in 88 cases (positive for B. pertussis in 38 and B. parapertussis in 3), and PCR tests in 73 (positive for B. pertussis in 70 and B. parapertussis in 3). CONCLUSIONS: the diagnosis of pertussis is usually challenging, as its initial symptoms are nonspecific. Early diagnosis is essential for early initiation of treatment and adequate contact prophylaxis

Importancia del diagnóstico y tratamiento precoz de la encefalitis herpética / Importance of early diagnosis and treatment of herpetic encephalitis

El virus del herpes simple (VHS) produce una encefalitis necrotizante aguda, afectando típicamente al lóbulo temporal. La existencia de un fármaco antiviral específico, así como el uso de medicación adyuvante como la corticoterapia, han mejorado el pronóstico de las infecciones graves. El retraso en el inicio del tratamiento con aciclovir es un factor claramente relacionado con mala evolución, así como las pautas cortas de tratamiento que se han asociado con mayor riesgo de recidivas

Herpes simplex virus (HSV) causes acute necrotizing encephalitis, typically affecting the temporal lobe. The existence of a specific antiviral drug as well as the use of adjuvant medication such as corticotherapy, have improved the prognosis of severe infections. The delay in the start of treatment with acyclovir is a factor clearly related to poor evolution, as well as short treatment guidelines that have been associated with an increased risk of recurrence

Mastoiditis aguda con complicación intracraneal. Reporte de un caso pediátrico / Acute mastoiditis with intracranial complication in a pediatric patient

La mastoiditis aguda es una infección de las celdillas mastoideas, generalmente, secundaria a la progresión de una otitis media aguda. Las bacterias aisladas con más frecuencia en las mastoiditis son Streptococcus pneumoniae, Streptococcus pyogenes y Staphylococcus aureus. La infección mastoidea puede extenderse por contigüidad, afectar a estructuras vecinas y dar lugar a complicaciones intra- o extracraneales. Las más frecuentes son las intracraneales, entre las que se incluyen la meningitis, el absceso cerebeloso o del lóbulo temporal, el absceso epi- o subdural y la trombosis de senos venosos.Se presenta el caso de una niña de 4 años que desarrolló dos complicaciones intracraneales (absceso epidural y trombosis de senos venosos transverso y sigmoideo) a partir de una mastoiditis aguda producida por Streptococus pyogenes

Acute mastoiditis is an infection that affects the mastoid air-cell system, usually due to the progression of an acute otitis media. The bacteria most frequently isolated in acute mastoiditis are Streptococcus pneumoniae, Streptococcus pyogenes and Staphylococcus aureus. The mastoid infection can extend affecting contiguous structures and producing intra or extracranial complications. The most frequent ones are intracranial complications, including meningitis, temporal lobe or cerebellar abscess, epidural or subdural abscess and venous sinus thrombosis.We present the case of a 4-year-old girl who developed two intracranial complications (intracranial epidural abscess and transverse and sigmoid sinus thrombosis) initiated in an acute mastoiditis produced by Streptococcus pyogenes.

[Acute mastoiditis with intracranial complication in a pediatric patient]. / Mastoiditis aguda con complicación intracraneal. Reporte de un caso pediátrico.

Acute mastoiditis is an infection that affects the mastoid air-cell system, usually due to the progression of an acute otitis media. The bacteria most frequently isolated in acute mastoiditis are Streptococcus pneumoniae, Streptococcus pyogenes and Staphylococcus aureus. The mastoid infection can extend affecting contiguous structures and producing intra or extracranial complications. The most frequent ones are intracranial complications, including meningitis, temporal lobe or cerebellar abscess, epidural or subdural abscess and venous sinus thrombosis. We present the case of a 4-year-old girl who developed two intracranial complications (intracranial epidural abscess and transverse and sigmoid sinus thrombosis) initiated in an acute mastoiditis produced by Streptococcus pyogenes.

La mastoiditis aguda es una infección de las celdillas mastoideas, generalmente, secundaria a la progresión de una otitis media aguda. Las bacterias aisladas con más frecuencia en las mastoiditis son Streptococcus pneumoniae, Streptococcus pyogenes y Staphylococcus aureus. La infección mastoidea puede extenderse por contigüidad, afectar a estructuras vecinas y dar lugar a complicaciones intra- o extracraneales. Las más frecuentes son las intracraneales, entre las que se incluyen la meningitis, el absceso cerebeloso o del lóbulo temporal, el absceso epi- o subdural y la trombosis de senos venosos. Se presenta el caso de una niña de 4 años que desarrolló dos complicaciones intracraneales (absceso epidural y trombosis de senos venosos transverso y sigmoideo) a partir de una mastoiditis aguda producida por Streptococus pyogenes.

Características clínicas y evolutivas de la neumonía adquirida en la comunidad en pacientes hospitalarios / Clinical features and course of disease of community-acquired pneumonia in inpatients

INTRODUCCIÓN: la neumonía adquirida en la comunidad (NAC) sigue siendo una enfermedad frecuente en la edad pediátrica, encontrándose entre las primeras causas de mortalidad. El objetivo del estudio fue conocer la incidencia de las neumonías ingresadas y describir sus características. MATERIAL Y MÉTODOS: estudio descriptivo y retrospectivo que incluyó a los pacientes ingresados en el Servicio de Pediatría del Hospital Universitario Miguel Servet de Zaragoza (España), con el diagnóstico de NAC durante dos años para describir sus características clínicas, radiológicas, analíticas, demográficas y complicaciones. RESULTADOS: se registraron 248 casos de neumonía, con una media de edad de 37,60 ± 2,20 meses, siendo significativamente mayor en neumonías bacterianas típicas (41,98 ± 37,46) y atípicas (73,43 ± 41,28) frente a las víricas (23,30 ± 19,07) (p <0,0001 y p = 0,0004 respectivamente). La neumonía más frecuente fue la de probable origen neumocócico (47,6%; intervalo de confianza del 95% [IC 95]: 41,84 a 54,18) mientras que el agente identificado con más frecuencia el virus respiratorio sincitial (34,65%; IC 95: 26,93 a 43,26). La odds ratio de presentar patrón radiológico alveolar en neumonías bacterianas frente a víricas fue de 2,98 (IC 95: 1,50 a 5,91; p = 0,0013). El antibiótico más utilizado fue ampicilina intravenosa (62,87%), siendo la duración mayor en las neumonías típicas bacterianas. CONCLUSIÓN: la NAC que precisa ingreso hospitalario es más prevalente en niños menores de cuatro años; con una incidencia y complicaciones similares a las descritas en otras series. El diagnóstico etiológico y el consiguiente tratamiento antibiótico continúa siendo un reto difícil de alcanzar

INTRODUCTION: community-acquired pneumonia (CAP) remains a common disease in children and is one of the leading causes of death in this age group. The objective of our study was to estimate the incidence of hospital admission due to CAP and describe some of its characteristics. MATERIAL AND METHODS: we conducted a descriptive and retrospective study with inclusion of patients admitted to the Hospital Universitario Infantil Miguel Servet of Zaragoza with a diagnosis of CAP over a 2-year period to describe its clinical, radiological, laboratory, demographic characteristics and associated complications. RESULTS: we found records for 248 cases of pneumonia; the mean age was 37.6 ± 2.2 months and was significantly higher in cases of typical bacterial pneumonia (41.98 ± 37.46) or atypical pneumonia (73.43 ± 41.28) compared to viral pneumonia (23.30 ± 19.07) (p < 0.0001 and p = 0.0004, respectively). The most common type of pneumonia was of probable pneumococcal aetiology (47.6%; 95 CI: 41.84 to 54.18), and the most frequently identified causative agent was respiratory syncytial virus (34.65%; IC 95: 26.93 to 43.26). The odds ratio of presenting an alveolar radiographic pattern in bacterial pneumonia was 2.98 (95 CI: 1.50 to 5.91; p = 0.0013). The most frequently used antibiotic was intravenous ampicillin (62.87%), with longer duration of treatment in cases of bacterial pneumonia. CONCLUSION: CAP requiring hospital admission was most frequent in children aged less than 4 years, with an incidence and associated complications similar to those described in the previous literature. The aetiological diagnosis and subsequent selection of the optimal antibiotic therapy remain challenging

Síndrome de shock tóxico estreptocócico / Streptococcal toxic-shock syndrome

El síndrome de shock tóxico estreptocócico (SSTS) es un cuadro grave e infrecuente en Pediatría. Sin embargo, en las últimas décadas está aumentando la incidencia de infecciones invasivas por Streptococcus pyogenes o estreptococo del grupo A. Aparece más frecuentemente en niños preescolares, ya que el diagnóstico de enfermedad estreptocócica es más complicado a esta edad. Es fundamental el diagnóstico y tratamiento precoz debido a su potencial gravedad, precisando en algunas ocasiones medidas intensivas de soporte vital y prevención del fallo multiorgánico

Streptococcal toxic shock syndrome (STSS) is a serious and uncommon disease in Pediatrics. However, in the last decades the incidence of invasive infections by Streptococcus pyogenes of group A streptococcus has increased. It appears more frequently in preschool children since the diagnosis of streptococcal disease is more complicated at this age. Early diagnosis and treatment are essential due to its potential severity, sometimes requiring intensive life support measures and prevention of multiorgan failure

Otitis media aguda: una causa poco frecuente de síndrome de Lemierre / Acute otitis media: a rare cause of Lemierre's syndrome

El síndrome de Lemierre es una patología poco frecuente y potencialmente letal, que se origina como complicación de una infección localizada a nivel de cabeza y cuello que se extiende al espacio carotídeo. Se asocia a tromboflebitis séptica de la vena yugular interna y con frecuencia produce embolias sépticas a distancia. Se presenta generalmente como un cuadro de fiebre y odinofagia de varios días de evolución tras el antecedente de una infección orofaríngea aparentemente resuelta. Otros focos infecciosos menos frecuentes pueden corresponder a mastoiditis, sinusitis u otitis media aguda. El diagnóstico es fundamentalmente clínico y apoyado en las pruebas de imagen, como la ecografía Doppler y la tomografía computarizada cervical con contraste. El tratamiento consiste en antibioterapia prolongada con adecuada cobertura para anaerobios, especialmente Fusobacterium necrophorum, el patógeno más frecuente. El papel de la anticoagulación en el síndrome de Lemierre es controvertido. Se presenta un caso de síndrome de Lemierre secundario a una otitis media aguda

Lemierre's syndrome is a rare and potentially lethal disease that originates as a complication of a localized infection at the head and neck level that extends to the carotid space. It is associated with septic thrombophlebitis of the internal jugular vein and often produces septic emboli at a distance. It usually presents as a picture of fever and odynophagia several days after the history of an apparently resolved oropharyngeal infection. Other less frequent infectious foci may correspond to mastoiditis, sinusitis or acute otitis media. The diagnosis is fundamentally clinical and supported by imaging tests such as Doppler ultrasound and cervical CT with contrast. The treatment consists of prolonged antibiotic therapy with adequate coverage for anaerobes, especially Fusobacterium necrophorum, which is the most frequent pathogen. The role of anticoagulation in Lemierre's syndrome is controversial. We present a case of Lemierre's syndrome secondary to acute otitis media

Epidemiological and clinical features of Kawasaki disease in Spain over 5 years and risk factors for aneurysm development. (2011-2016): KAWA-RACE study group.

BACKGROUND: Kawasaki disease (KD) is an acute self-limited systemic vasculitis of unknown etiology affecting mainly children less than 5 years of age. Risk factors for cardiac involvement and resistance to treatment are insufficiently studied in non-Japanese children. OBJECTIVE: This study aimed to investigate the epidemiology, clinical features and risk factors for resistance to treatment and coronary artery lesions (CAL) in KD in Spain. METHODS: Retrospective study (May 2011-June 2016) of all patients less than 16 years of age diagnosed with KD included in KAWA-RACE network (84 Spanish hospitals). RESULTS: A total of 625 cases were analyzed, 63% were males, 79% under 5 year-olds and 16.8% younger than 12 months. On echocardiographic examination CAL were the most frequent findings (23%) being ectasia the most common (12%). Coronary aneurysms were diagnosed in 9.6%, reaching 20% in infants under 12 months (p<0.001). A total of 97% of the patients received intravenous immunoglobulin (IVIG) with a median number of days from fever onset to IVIG administration of 7.2. A second dose was given to 15.7% and steroids to 14.5% patients. Only 1.4% patients received infliximab. No deaths were reported. A multivariate analysis identified anemia, hypoalbuminemia, hyponatremia, higher creatinine and procalcitonin as independent risk factors for treatment failure and length under 103 cm, hemoglobin < 10.2 mg/dL, platelets > 900,000 cells/mm3, maximum temperature < 39.5°C, total duration of fever > 10 days and fever before treatment ≥ 8 days as independent risk factors for developing coronary aneurysms. CONCLUSIONS: In our population, children under 12 months develop coronary aneurysms more frequently and children with KD with anemia and leukocytosis have high risk of cardiac involvement. Adding steroids early should be considered in those patients, especially if the treatment is not started before 8 days of fever. A score applicable to non-Japanese children able to predict the risk of aneurysm development and IVIG resistance is necessary.

Encefalopatía por virus herpes 6 como complicación de exantema súbito / Encephalopathy due to human herpesvirus 6 infection as exanthema subitum complication

La principal manifestación clínica del herpesvirus 6 es el exantema súbito (también conocido como roséola o sexta enfermedad) y el síndrome febril. Las manifestaciones en el sistema nervioso central no son infrecuentes en la infección por herpesvirus 6, y su fisiopatología no está esclarecida, pero precisan diagnóstico y tratamiento temprano para evitar secuelas potencialmente graves. Se presenta el caso de una niña inmunocompetente de 2 años con cuadro de encefalitis como complicación de infección por herpesvirus 6. Se destaca la importancia del diagnóstico oportuno a fin de instaurar un adecuado tratamiento y seguimiento para evitar complicaciones secundarias a la afectación del sistema nervioso central.

The main clinical manifestation of human herpesvirus 6 is exanthema subitum (also known as roseola infantum) and febrile syndrome. Central nervous system manifestations are not unusual in herpesvirus 6 infection, and even though the pathophysiology is not clear, they need to be early diagnosed and treated in order to avoid potentially serious damage. We present the case of an immunocompetent 2-year-old girl with encephalitis as a complication of herpesvirus 6 infection. We want to emphasize the significance of an early diagnosis and treatment in order to prevent further complications due to the central nervous system extension.

[Encephalopathy due to human herpesvirus 6 infection as exanthema subitum complication]. / Encefalopatía por virus herpes 6 como complicación de exantema súbito.

The main clinical manifestation of human herpesvirus 6 is exanthema subitum (also known as roseola infantum) and febrile syndrome. Central nervous system manifestations are not unusual in herpesvirus 6 infection, and even though the pathophysiology is not clear, they need to be early diagnosed and treated in order to avoid potentially serious damage. We present the case of an immunocompetent 2-year-old girl with encephalitis as a complication of herpesvirus 6 infection. We want to emphasize the significance of an early diagnosis and treatment in order to prevent further complications due to the central nervous system extension.

La principal manifestación clínica del herpesvirus 6 es el exantema súbito (también conocido como roséola o sexta enfermedad) y el síndrome febril. Las manifestaciones en el sistema nervioso central no son infrecuentes en la infección por herpesvirus 6, y su fisiopatología no está esclarecida, pero precisan diagnóstico y tratamiento temprano para evitar secuelas potencialmente graves. Se presenta el caso de una niña inmunocompetente de 2 años con cuadro de encefalitis como complicación de infección por herpesvirus 6. Se destaca la importancia del diagnóstico oportuno a fin de instaurar un adecuado tratamiento y seguimiento para evitar complicaciones secundarias a la afectación del sistema nervioso central.

Preescolar con exantema cutáneo y fiebre / Infant with exanthema and fever

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