Bordetella pertussis en Latinoamérica: ¿estamos reconociendo el problema? / Bordetella pertussis (Whooping Cough) in Latin America: Are we aware of the problem?

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Ataxia aguda cerebelosa posvaricela en niños costarricenses / Postvaricella cerebellar ataxia in children in Costa Rica

Introducción. La ataxia cerebelosa aguda posvaricela (ACAPV) y la meningoencefalitis son las complicaciones neurológicas agudas más comunes de la varicela. El objetivo del estudio es describir la presentación clínica, el tratamiento médico y el pronóstico de la ACAPV en niños costarricenses hospitalizados en el único hospital pediátrico de nuestro país, donde la vacunación contra la varicela aún no es sistemática. Métodos. Estudio descriptivo retrospectivo; se incluyeron pacientes de entre 1 y 12 años de edad, egresados del Hospital de Nacional Niños de Costa Rica entre enero de 1997 y junio de 2004, con el diagnóstico de ACAPV. Resultados. De los 441 pacientes inmunocompetentes que fueron hospitalizados por presentar complicaciones asociadas a virus varicela zóster durante este período, 37 pacientes (8,4 %) tuvieron ACAPV, y 24/37 (64,9 %) fueron varones. La edad media (rango) fue de 5 años (1-10 años). La media (rango) de aparición de la ataxia tras el inicio del brote fue de 2 días (1-30). El análisis del líquido cefalorraquídeo (LCR) se realizó en 22 pacientes (59,5 %) y en todos fue normal. La tomografía computarizada (TC) mostró edema cerebral en 6/18 pacientes (33,3 %). Un total 23 niños de 37 recibieron aciclovir intravenoso, aunque no se observaron diferencias significativas (p > 0,05) entre ambos grupos en cuanto a beneficio con la terapia. La duración media (rango) de la ataxia fue de 4 días (1-10) y 7 pacientes (19 %) fueron dados de alta atáxicos. La estancia hospitalaria media (rango) fue de 4,4 días (2-11). Se documentaron secuelas menores en 13/24 pacientes (54,2 %) durante las visitas de seguimiento y contactos telefónicos. Conclusiones. La ACAPV usualmente se asocia con un pronóstico favorable; sin embargo, pueden producirse secuelas neurológicas. La utilidad real del aciclovir y de realizar estudios de imágenes cerebrales en estos niños es controvertida

Introduction. Postvaricella cerebellar ataxia (PVCA) and meningoencephalitis are the most common acute neurological complications of chickenpox. The objective of this study was to describe the clinical presentation, management, and outcome of children hospitalized with PVCA in the only pediatric hospital of this developing country, where routine varicella immunization is not yet available. Methods. We performed a retrospective chart review of children aged 1-12 years old admitted to the National Children's Hospital of Costa Rica from January 1997 to June 2004 with a diagnosis of PVCA. Results. Among the 441 immunocompetent patients admitted for varicella zoster virus-associated complications during this period, 37 (8.4 %) had PVCA. Twenty-four of the 37 (64.9 %) patients were boys. The mean (range) age was 5 (1-10) years. The median (range) interval from rash onset to admission was 2 (1-3) days. Cerebrospinal fluid analysis was available in 22 (59.5 %) patients and was normal in all. Head computed tomography showed cerebral edema in six out of 18 patients (33.3 %). Intravenous acyclovir was administered to 23 patients but no significant differences in clinical manifestations or outcomes were observed in treated versus untreated patients. The mean (range) length of ataxia was 4 (1-10) days, and seven (19 %) patients were still ataxic on discharge. The mean (range) length of hospital stay was 4.4 (2-11) days. Minor sequelae were documented in 13 out of 24 (54.2 %) patients during follow-up visits and telephone contacts. Conclusions. PVCA is usually associated with a favorable prognosis; however, neurological sequelae can occur. The real utility of acyclovir treatment and brain imaging studies in these children remains controversial

Síndrome de rubéola congénita en Costa Rica: importancia de reforzar la vigilancia activa / Congenital rubella syndrome in Costa Rica: importance of active surveillance

Objetivo: Identificar los casos de síndrome de rubéola congénita(SRC) y su forma de presentación en niños menores de3 meses atendidos en el Hospital Nacional de Niños de1996 a 2000. Métodos: En el período de 1996 a 2000 se seleccionaron los pacientes de un día de edad a 3 meses, con un positivo de serologíaI gM por rubéola, identificados por medio del registro computarizado del laboratorio. Se revisó la historia clínica correspondiente, analizando las características delos pacientes. Resultados: Se identificaron 66 niños con serología positiva, 49 tenían historia clínica completa que permitió la revisión. De éstos, 29 (60 %) eran varones. La edad media en que se solicitó la serología fue de 33 días. La hepatosplenomegalia, la microcefalia y las polimalformaciones fueron las tres principales manifestaciones por las cuales se solicitó la serología. El diagnóstico inicial que predominó fue el TORCHS (toxoplasmosis, rubéola, citomegalovirus, herpes,sífilis). Tras la revisión final de los 49 casos, 45 pacientes se clasificaron como SRC y cuatro como infección por rubéola. Conclusiones: El presente estudio pone de manifiesto la necesidad dereforzar la vigilancia activa permanente del SRC. Se debe reforzar la búsqueda de signos y síntomas, así como los antecedentes maternos que permitan la sospecha adecuada y la comunicación oportuna de los casos de SRC

Objective: To identify cases of congenital rubella syndrome (CRS)and their form of presentation in children aged < 3 months in the National Children’s Hospital of Costa Rica between1996 and 2000.MethodsBetween 1996 and 2000, patients aged 1 day to 3 months with positive IgM serology for rubella, identified by means of the computerized database of the National Children’s Hospital Laboratory, were selected. Their corresponding medical records were reviewed and the characteristics of these patients were analyzed. Results: Sixty-six children with positive serology were identified, of which 49 had a complete medical record that allowed review. Of these, 29 (60 %) were boys. The mean age at which IgM serology was requested was 33 days. The principal manifestations leading to serology were hepatospleno megaly, microcephaly and multiple congenital anomalies. The initial diagnosis was TORCH infection. Of the 49 patients, 45 were classified as CRS and four as infection with rubella. Conclusions: The present study highlights the need to increase active surveillance of CRS. Greater vigilance in applying the criteria for clinical diagnosis is required to allow an adequate degree of suspicion and early reporting of cases

Venomous snakebites in children and adolescents: a 12 year retrospective review

Snakebite envenomation is a worldwide problem and in Costa Rica. The following is a retrospective review of 79 patients admitted to the Hospital Nacional de Ninos (HNN) from January 1985 to September 1996. Child's age ranged from 9 months to 14 years. The M: F ratio was 1.5:1. Sixty percent of the patients lived in remote rural areas. The most common clinical signs at the time of hospitalization were pain and edema. Fifty patients (63.29 per cent) showed moderate to severe envenomation grades. Fifty-one (64,55 per cent) was caused by Bothrops asper. Complications during hospitalization were compartment syndrome and secondary infection. Three children died, one from disseminated intravascular coagulation, another from renal insufficiency, and the third from a perforated duodenal ulcer. Patients who underwent early fasciotomy had signficantly less hospitalization and fewer infectious complications, (p<0.001). There was no relationship between the envenomation grade and length of hospitalization (p=0.4). The most common pathogen isolated was S. aureus. Early fasciotomy seemed to reduce the complications seen in these patients. Further studies are necessary to identify the factors that may clinicians to decide those who should undergo fasciotomy, as well as the best moment to perform it

Abscess secondary to facial snakebite

In Costa Rica, approximately 700 snakebite cases occur each year, 5 to 10 of which result in death. At the Hospital Nacional de Ninos (HNN), 6 to 10 cases are reported annually, more than half of these cases and nearly all deaths are result from Bothrops asper snakebite. This venomous snake, popularly known as the "terciople", most often attacks the lower upper limbs and characteristically produces local tissue damage, which can be severe. The following is a report of the first case of a non-fatal and unusual facial bite caused by Bothrops asper in our country.