expressing serotype 3 has a high virulence and a high case fatality ratio. Most studies of serotype 3 pneumococci have focused on a single lineage, the widespread sequence type 180 (ST180). To ...evaluate the serotype 3 lineages causing infections in Mexico, we characterized 196 isolates recovered from 1994 to 2017. The isolates were mostly susceptible to all antimicrobials tested. A single meningitis isolate was resistant to penicillin, and the resistance to erythromycin was 5.2%. The isolates represented the widely disseminated clonal complex 180 (CC180;
= 140), the unusual CC4909 (
= 42), CC260 (
= 11), and a few singletons (
= 3). CC260 was less frequent among pneumococcal invasive disease isolates than CC180 and CC4909 (
= 0.015). There was a decrease of CC4909 (
< 0.001) following PCV13 introduction (2012 to 2017). The CC4909 isolates were represented mostly by ST1119 (
= 40), seemingly having a restricted geographic origin, with isolates in the PubMLST database having been recovered only in Mexico, the United States, and Germany. A genomic analysis of publicly available genomes showed that ST1119 isolates have less than 32% similarity with ST180 isolates, indicating that these lineages are more separated than revealed by traditional multilocus sequence typing. Considering the suggestions of a lower efficacy of the 13-valent pneumococcal conjugate vaccine against serotype 3, the different dynamics of the two major serotype 3 lineages in Mexico following the introduction of PCV13 should be closely monitored.
Tuberculosis (TB) is a prevalent disease throughout the world. The extent of TB illness in childhood is not clear; recent data shows that 10-20% of the cases are found in children under 15 years old. ...In 2017, 1 million children developed the disease, of which 9% were co-infected with HIV.
A cross-sectional study that analyzed 48 children diagnosed with HIV-infection in Guadalajara, Mexico. The tuberculin skin test (TST) and QuantiFERON-TB Gold In-Tube test (QFT) were performed and compared to diagnose latent TB infection (LTBI).
The average age was 9 years old (± 4), with an age range of 1-16 years; the 6-12-year-old group predominated with 50% of cases. 27 patients (56%) were male; 83% had received the BCG vaccination and 23% had a history of being contacts of TB cases. In the study, 40 patients (83%) were without immunosuppression; seven (15%) with moderate immunosuppression, and only one patient had severe immunodeficiency. Overall, 3 of the 48 children (6.2%) had a positive TST, while 8 out of 48 (16.6%) had a positive QFT. The concordance between the two tests was 89.6% (43/48) with Kappa = 0.5 (95% CI, 0.14-0.85).
The QFT test represents an opportunity in the diagnosis of LTBI, particularly in pediatric HIV- patients. This is the first study that compares the two tests (TST and QFT) in children with HIV-infection in Guadalajara, Mexico.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Bacterial meningitis is one of the diseases that, despite the introduction of several vaccines, remains a serious public health concern.
Streptococcus pneumoniae
(Spn),
Neisseria meningitidis
(Nm), ...and
Haemophilus influenzae
(Hi) are responsible for most cases diagnosed in children, adolescents, and adult population. Rapid, sensitive, and specific laboratory assays are critical for effective diagnosis and treatment, particularly in countries like Mexico in which culture positivity rates are very low due to the use of antibiotics prior to sample collection and to delay in transporting samples to the laboratory. The aim of this study was to evaluate the use of real-time polymerase chain reaction (RT-PCR) of cerebrospinal fluid (CSF) as a rapid diagnostic test for bacterial meningitis and compare these results with bacterial culture in three general hospitals in Mexico. During a 5-year period (2014–2018), a total of 512 CSF samples obtained from patients in whom infectious meningitis was suspected as initial clinical diagnosis were tested with RT-PCR with species-specific targets for the three pathogens. For Spn, 5.07% samples were RT-PCR positive; 0.39% for Nm and none for Hi. Only five RT-PCR Spn positive samples had a positive culture. Sensitivity and specificity estimates for RT-PCR are 100% and 95.46%, respectively. DNA amplification methods can provide better sensitive diagnostic tests than the reference standard, which is culture, particularly when antimicrobial treatment is initiated before clinical samples can be obtained.
Highlights • We describe an annual decrease in the proportion of pneumococcal serotypes included in pneumococcal conjugate vaccines (PCV) causing invasive and non-invasive pneumococcal disease among ...people. • 5 years of age not targeted to receive the vaccine, after introduction of PCV in the universal vaccine program. • The strongest decrease of pneumococcal diseases was observed in the group of adults from 18 to 49 years of age. • A statistically significant increase of serotype 19A in all study groups was observed, except in adults ≥65 years. • A significant increase of non-vaccine pneumococcal serotypes was observed after the introduction of PCV: Serogroup 15 in the age group 50-64 years and serogroup 23 in children and adolescents among 5-17 years old.
Multisystem inflammatory syndrome in children associated with coronavirus disease 2019 (MIS-C), a novel hyperinflammatory condition secondary to severe acute respiratory syndrome coronavirus 2 ...(SARS-CoV-2) infection, is associated with severe outcomes such as coronary artery aneurysm and death.
This multicenter, retrospective, observational cohort study including eight centers in Mexico, aimed to describe the clinical characteristics and outcomes of patients with MIS-C. Patient data were evaluated using latent class analysis (LCA) to categorize patients into three phenotypes: toxic shock syndrome-like (TSSL)-MIS-C, Kawasaki disease-like (KDL)-MIS-C, and nonspecific MIS-C (NS-MIS-C). Risk factors for adverse outcomes were estimated using multilevel mixed-effects logistic regression.
The study included 239 patients with MIS-C, including 61 (26%), 70 (29%), and 108 (45%) patients in the TSSL-MIS-C, KDL-MIS-C, and NS-MIS-C groups, respectively. Fifty-four percent of the patients were admitted to the intensive care unit, and 42%, 78%, and 41% received intravenous immunoglobulin, systemic glucocorticoids, and anticoagulants, respectively. Coronary artery dilatation and aneurysms were found in 5.7% and 13.2% of the patients in whom coronary artery diameter was measured, respectively. Any cause in-hospital mortality was 5.4%. Hospitalization after ten days of symptoms was associated with coronary artery abnormalities (odds ratio OR 1.6, 95% confidence interval CI 1.2-2.0). Age ≥10 years (OR: 5.6, 95% CI: 1.4-2.04), severe underlying condition (OR: 9.3, 95% CI: 2.8-31.0), platelet count <150,000 /mm
(OR: 4.2, 95% CI: 1.2-14.7), international normalized ratio >1.2 (OR: 3.8, 95% CI: 1.05-13.9), and serum ferritin concentration >1,500 mg/dl at admission (OR: 52, 95% CI: 5.9-463) were risk factors for death.
Mortality in patients with MIS-C was higher than reported in other series, probably because of a high rate of cases with serious underlying diseases.
Objectives:
Meningococcal meningitis is reported as a rare condition in Mexico. There are no internationally published studies on bacterial causes of meningitis in the country based on active ...surveillance. This study focuses on finding the etiology of bacterial meningitis in children from nine Mexican Hospitals.
Methods:
From January 2010 to February 2013, we conducted a three years of active surveillance for meningitis in nine hospitals throughout Mexico. Active surveillance started at the emergency department for every suspected case, and microbiological studies confirmed/ruled out all potentially bacterial pathogens. We diagnosed based on routine cultures from blood and cerebrospinal fluid (not polymerase chain reaction or other molecular diagnostic tests), and both pneumococcal serotyping and meningococcal serogrouping by using standard methods.
Results:
Neisseria meningitidis was the leading cause, although 75% of cases occurred in the northwest of the country in Tijuana on the US border. Serogroup C was predominant. Streptococcus pneumoniae followed Neisseria meningitides, but was uniformly distributed throughout the country. Serotype 19A was the most incident but before universal implementation of the 13-valent pneumococcal conjugate vaccine. Other bacteria were much less common, including Enterobacteriaceae and Streptococcus agalactiae (these two affecting mostly young infants).
Conclusions:
Meningococcal meningitis is endemic in Tijuana, Mexico, and vaccination should be seriously considered in that region. Continuous universal vaccination with the 13-valent pneumococcal conjugate vaccine should be nationally performed, and polymerase chain reaction should be included for bacterial detection in all cultures – negative but presumably bacterial meningitis cases.
El triaje pediátrico estructurado es un proceso de evaluación clínica preliminar para priorizar la atención por grado de urgencia, identificar riesgo vital, asegurar la reevaluación de los pacientes ...que deben esperar, decidir el área más apropiada para atenderlos y optimizar la calidad de la atención. Objetivo: determinar la utilidad de los métodos de triaje, Triángulo de Evaluación Pediátrica, Sistema de Alerta Temprana y SAVE A CHILD para la correcta identificación y jerarquización inicial de la gravedad de la enfermedad en niños.Material y métodos: estudio transversal de prueba diagnóstica realizado en el Servicio de Urgencias en Pediatría. Criterios de inclusión: ingreso por triaje. Criterios de exclusión: niños ya hospitalizados, ingreso por causa administrativa. Muestreo aleatorio simple. Se inició con la clasificación por un médico pediatra en triaje y asignación de nivel de gravedad (I-V) según The Canadian Paediatric E.D. Triage and Acuity Scale como estándar de referencia. Simultáneamente se recolectaron datos mediante los métodos Triángulo de Evaluación Pediátrica, Sistema de Alerta Temprana y SAVE A CHILD. Los datos obtenidos se corroboraron por un segundo pediatra al brindar la atención definitiva.Resultados: se evaluaron 1,120 niños; 560 ingresaron directamente del triaje a una cama de urgencias pediátricas (84.6% clasificados como nivel I, II o III) y 560 fueron revisados inicialmente en el consultorio después del triaje (20.2% nivel II o III). La sensibilidad para The Canadian Paediatric E.D. Triage Acuity Scale fue de 82%, obtuvimos especificidad de 80% y cociente de verosimilitudes positivo 4.16 (OR = 4.99; p < 0.001); para el Triángulo de Evaluación Pediátrica la sensibilidad fue de 81%, especificidad de 87% y cociente de verosimilitudes positivo 6.25 (OR 111; p < 0.001); para el Sistema de Alerta Temprana sensibilidad de 80%, especificidad de 85% y cociente de verosimilitudes positivo 5.2 (OR 92.3; p < 0.001); para SAVE A CHILD sensibilidad de 90%, especificidad de 23% y cociente de verosimilitudes positivo 1.2 (OR 15.2; p < 0.001).Conclusiones: el estudio demostró que el Triángulo de Evaluación Pediátrica, el Sistema de Alerta Temprana y SAVE A CHILD fueron instrumentos útiles para identificar y clasificar la gravedad de una emergencia pediátrica; el mejor resultado se obtuvo cuando se emplearon en conjunto.
Background and Aims Streptococcus pneumoniae is the leading cause of acute otitis media, pneumonia, meningitis, and sepsis. The heptavalent pneumococcal conjugate vaccine (PCV7) was incorporated into ...the national immunization program in Mexico in 2008. The aim of the study was to analyze the frequency of S. pneumoniae serotypes isolated from children ≤5 years of age with invasive diseases before and after the introduction of PCV7. Methods Isolates from sterile fluids, tissues and other body fluids were obtained from 1993 to 2012. Isolates collected in hospitals for the surveillance network were sent to the Instituto Nacional de Salud Publica. Serotyping was done using the Quellung reaction. The pre-vaccination period was considered from 1993–2007. Results A total of 1346 isolates were collected during 1993–2012. In the pre-vaccination era, serotypes included in PCV7 accounted for 59.7% of the strains, whereas in 2012 they represented only 21% of cases. There was a significant decrease in all PCV7-included serotypes. A gradual increase of the 19A serotype was detected during the vaccination period from 7% in 2008 to 39% of the isolates in 2012. In this year, 29% of the serotypes causing invasive disease were not included in any of the pneumococcal conjugate vaccines. Conclusion The emergence of PCV7 non-included serotypes after vaccination demands increased surveillance. Currently in Mexico, the 13-valent conjugate vaccine (PCV13) offers better coverage than the 10-valent pneumococcal conjugate vaccine (PCV10).
Abstract Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by the presence of autoantibodies and multisystemic disease. Viruses are widely associated with autoimmunity, and ...are also implicated in the pathogenesis of systemic lupus erythematosus. Two cases are described that have an autoimmune response related to dengue infection. The clinical presentation of systemic lupus erythematosus is very diverse, and in these cases it was important to consider SLE as a diagnosis.
BackgroundTuberculosis (TB) is a prevalent disease throughout the world. The extent of TB illness in childhood is not clear; recent data shows that 10-20% of the cases are found in children under 15 ...years old. In 2017, 1 million children developed the disease, of which 9% were co-infected with HIV.MethodsA cross-sectional study that analyzed 48 children diagnosed with HIV-infection in Guadalajara, Mexico. The tuberculin skin test (TST) and QuantiFERON-TB Gold In-Tube test (QFT) were performed and compared to diagnose latent TB infection (LTBI).ResultsThe average age was 9 years old (± 4), with an age range of 1-16 years; the 6-12-year-old group predominated with 50% of cases. 27 patients (56%) were male; 83% had received the BCG vaccination and 23% had a history of being contacts of TB cases. In the study, 40 patients (83%) were without immunosuppression; seven (15%) with moderate immunosuppression, and only one patient had severe immunodeficiency. Overall, 3 of the 48 children (6.2%) had a positive TST, while 8 out of 48 (16.6%) had a positive QFT. The concordance between the two tests was 89.6% (43/48) with Kappa = 0.5 (95% CI, 0.14-0.85).ConclusionsThe QFT test represents an opportunity in the diagnosis of LTBI, particularly in pediatric HIV- patients. This is the first study that compares the two tests (TST and QFT) in children with HIV-infection in Guadalajara, Mexico.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
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