Accuracy of heparin binding protein: as a new marker in prediction of acute bacterial meningitis

ABSTRACT Background: Cerebrospinal fluid bacterial culture is the gold-standard for confirmation of acute bacterial meningitis, but many cases are not culture confirmed. Antibiotics reduce the chance of a microbiological diagnosis. Objective to evaluate efficacy of Heparin-binding protein in diagnosis of bacterial meningitis. Patients: 30 patients diagnosed with acute bacterial meningitis, 30 viral meningitis, and 30 subjects with normal CSF findings. Design: Diagnosis was based on history, clinical criteria, CSF examination, latex agglutination & culture, and sensitivities and response to therapy. HBP was measured using enzyme-linked immunosorbent technique in both serum & CSF. Results: Cerebrospinal fluid HBP levels averaged 0.82 ± 0.3 ng/mL in controls, 3.3 ± 1.7 ng/mL in viral and 174.8 ± 46.7 ng/mL in bacterial meningitis. Mean serum level was 0.84 ± 0.3 ng/mL in the controls, 3.7 ± 1.9 ng/mL in viral, and 192.2 ± 56.6 ng/mL in bacterial meningitis. Both HBP levels were significantly higher in patients with bacterial meningitis. Cut-offs of 56.7 ng/ml and 45.3 ng/ml in cerebrospinal fluid & serum showed 100% overall accuracy. Even in patients who received prior antibiotics, remained elevated. Conclusion: Serum Heparin-binding protein serves as a non-invasive potential marker of acute bacterial meningitis even in partially treated cases.

Accuracy of heparin binding protein: as a new marker in prediction of acute bacterial meningitis

ABSTRACT Background: Cerebrospinal fluid bacterial culture is the gold-standard for confirmation of acute bacterial meningitis, but many cases are not culture confirmed. Antibiotics reduce the chance of a microbiological diagnosis. Objective to evaluate efficacy of Heparin-binding protein in diagnosis of bacterial meningitis. Patients: 30 patients diagnosed with acute bacterial meningitis, 30 viral meningitis, and 30 subjects with normal CSF findings. Design: Diagnosis was based on history, clinical criteria, CSF examination, latex agglutination & culture, and sensitivities and response to therapy. HBP was measured using enzyme-linked immunosorbent technique in both serum & CSF. Results: Cerebrospinal fluid HBP levels averaged 0.82 ± 0.3 ng/mL in controls, 3.3 ± 1.7 ng/mL in viral and 174.8 ± 46.7 ng/mL in bacterial meningitis. Mean serum level was 0.84 ± 0.3 ng/mL in the controls, 3.7 ± 1.9 ng/mL in viral, and 192.2 ± 56.6 ng/mL in bacterial meningitis. Both HBP levels were significantly higher in patients with bacterial meningitis. Cut-offs of 56.7 ng/ml and 45.3 ng/ml in cerebrospinal fluid & serum showed 100% overall accuracy. Even in patients who received prior antibiotics, remained elevated. Conclusion: Serum Heparin-binding protein serves as a non-invasive potential marker of acute bacterial meningitis even in partially treated cases.

Pentoxifylline as Adjunctive Therapy in Children with Acute Bacterial Meningitis

Introduction. Pentoxifylline, an inhibitor of tumor necrosis factor, has been shown in animal models of acute bacterial meningitis that reduce the host inflammatory response. Objective. To evaluate the effect of pentoxifylline administrated as adjunctive therapy in the treatment of acute bacterial meningitis in children. Material and methods. Prospective and open study that included children, between 3 months to 15 years old hospitalized in the Institute of Tropical Medicine, of Asunción, Paraguay, with the diagnosis of acute bacterial meningitis. Patients were randomly assigned, to receive in addition to antibiotic therapy (cefotaxime or ceftriaxone) pentoxifylline, dexamethasone, or neither. The presenting status was recorded and the course of disease monitored with preset criteria. The primary endpoints comprised death and severe neurological sequelae. Results. Eighty seven children received as adjunctive drug pentoxifylline (n=35), dexamethasone (n=30) and neither (n=22). At admission, the demographic, clinical and laboratory characteristics of the patients were comparable. There were no significant differences among the three groups regarding to the duration of fever and meningeal symptoms after admission. The mortality were comparable (11% in pentoxifylline, 13% in dexamethasone and 9% in control group) (p>0.6). Among the survivor patients, unfavorable outcome (severe sequelae) was observed in 13%, 20% and 15% for pentoxifylline-, dexamethasone- and control-group, respectively (p>0.5). Conclution. The data of the present study do not support the routine use of pentoxifylline as adjunctive therapy for bacterial meningitis in children.

Resumen Introducción. La pentoxifilina, un inhibidor del factor de necrosis tumoral, se ha demostrado en modelos animales de la meningitis bacteriana aguda que reducen la respuesta inflamatoria del huésped. Objetivo. Para evaluar el efecto de la pentoxifilina se administra como terapia auxiliar en el tratamiento de la meningitis bacteriana aguda en niños. Material y métodos. Estudio prospectivo y abierto que incluyó a los niños, entre 3 meses a 15 años de edad hospitalizado en el Instituto de Medicina Tropical, de Asunción, Paraguay, con el diagnóstico de la meningitis bacteriana aguda. Los pacientes fueron asignados al azar para recibir, además de la terapia con antibióticos (cefotaxima o ceftriaxona) pentoxifilina, dexametasona, o ninguno. El estado de presentación se registró y el curso de la enfermedad monitorizó con criterios preestablecidos. Los criterios de valoración primarios comprenden la muerte y secuelas neurológicas graves. Resultados: Ochenta y siete niños recibieron pentoxifilina drogas como adyuvante (n = 35), dexametasona (n = 30) y no (n = 22). Al ingreso, las características demográficas, clínicas y analíticas de los pacientes eran comparables. No hubo diferencias significativas entre los tres grupos en cuanto a la duración de la fiebre y los síntomas meníngeos después de la admisión. La mortalidad fue comparable (11% en pentoxifilina, 13% en dexametasona y 9% en el grupo control) (p > 0,6). Entre los pacientes sobrevivientes, se observó un resultado desfavorable (secuelas graves) en el 13%, 20% y 15% para pentoxifylline-, dexamethasone- y el control de grupos, respectivamente (p> 0,5). Conclución. Los datos del presente estudio no apoyan el uso rutinario de la pentoxifilina como tratamiento adyuvante para la meningitis bacteriana en niños.

Caracterización clínica de los casos de enfermedad meningocóccica por serogrupo W135 confirmados durante el año 2012 en Chile / Clinical characterization of cases with meningococcal disease by W135 group in Chile, 2012

Background: During 2012 in Chile, there were 60 cases of serogroup W135 meningococcal disease, which accounts for 57.7% of identified serogroup cases. Aim: To describe main clinical features of patients with serogroup W135 meningococcal disease confirmed in 2012. Material and Methods: Descriptive study of case series based on retrospective review of medical records. Results: Male patients represented 61.7% and 46.7% were children under 5 years. At first clinical attention, 3.4% of patients were suspected of meningococcal disease, while 83.3% had meningococcemia as final diagnosis. Also at first attention, the most common symptoms or clinical signs were fever ≥ 38.0° C (60.3%), cold symptoms (52.5%), and nausea or vomiting (46.7%). Meningeal signs had a low frequency (8.7%). Diarrhea was the second most common symptom found among deceased patients (55.6%) and statistically higher than survivors (26.8%; p = 0.034). Six cases reported with sequelae: limb amputation, hearing loss or neurological damage, and mortality was 31.7%. Discussion: In 2012, serogroup W135 meningococcal disease reported high mortality, atypical clinical presentation, low initial meningococcal disease diagnosis, and a high number of cases with poor clinical course.

Introducción: En el año 2012 en Chile, se presentaron 60 casos de enfermedad meningocóccica (EM) causadas por serogrupo W135, que representa 57,7% de los casos seroagrupables. Objetivo: Describir las características clínicas de los casos de EM por serogrupo W135 confirmados durante el año 2012. Material y Métodos: Estudio descriptivo, de series de casos basada en la revisión de las fichas clínicas. Resultados: El 61,7% de los casos fueron varones y 46,7% tenía menos de 5 años. En la primera consulta, 3,4% tuvo sospecha de EM, en tanto 83,3% tuvo diagnóstico final de meningococcemia. En la primera consulta, los síntomas y/o signos más frecuentes fueron fiebre ≥ 38,0°C (60,3%), cuadro catarral respiratorio (52,5%) y náuseas y/o vómitos (46,7%). Mientras que los signos de irritación meníngea se presentaron en 8,7%. En los fallecidos la diarrea fue el segundo síntoma más frecuente (55,6%), y estadísticamente superior respecto de los sobrevivientes (26,8%; p = 0,034). Seis casos presentaron secuelas: amputaciones de extremidades, hipoacusia o daño neurológico y la letalidad fue de 31,7%. Discusión: la EM por el serogrupo W135 en el año 2012, tuvo una elevada letalidad, presentación clínica inespecífica, sospecha diagnóstica inicial baja y un alto número de casos cursaron con una mala evolución.