Radiological Features of Herpetic Encephalitis in Children

BACKGROUND

Nonspecific clinical manifestations and unclear radiological features may delay treatment initiation in pediatric patients with Herpes simplex encephalitis (HSE). The aim of this study is to analyze the clinical and radiological features of the disease.

METHODS

Clinical, laboratory, and magnetic resonance imaging (MRI) data were obtained retrospectively from a group of 37 hospitalized pediatric patients older than two months and with a polymerase chain reaction-confirmed HSE diagnosis. Clinical severity (i.e., mechanical ventilatory support) and outcome at discharge (i.e., pediatric modified Rankin Scale [ped-mRS]) were also assessed.

RESULTS

Median age was 14 months (interquartile range: 10-36). All patients survived, 15 (41%) had complete recovery (i.e., ped-mRS = 0), and 10 (27%) had significant residual disability at discharge (i.e., ped-mRS ≥3). Brain MRI was obtained in 31 patients. T2-hyperintense lesions were usually bilateral (28, 90%) and multifocal (30, 97%). Hemorrhage and mass effect were observed in 13 (42%) and 15 (48%) patients, respectively. Parenchymal lesions involved the temporal lobes (94%), insula (90%), parietal lobes (84%), and frontal lobes (61%). Occipital lesions were rare. In multivariable binary logistic regression models the presence of altered consciousness was associated with mechanical ventilation (odds ratio [OR] = 8.2, Nagelkerke R2 = 0.22), whereas the involvement of the occipital lobes (OR = 7.8) and the administration of vasopressors (OR = 12.1) were independent predictors of poor outcome (Nagelkerke R2 = 0.41).

CONCLUSIONS

Brain MRI is useful for diagnosis and outcome assessment in pediatric HSE. Radiological patterns with common frontotemporal involvement overlap adults, but multifocal and parietal lobe abnormalities are observed as well.

Newly detected paediatric melioidosis cases in a single referral children's hospital in Ho Chi Minh City indicate the probable underrecognition of melioidosis in South Vietnam

BACKGROUND

The epidemiology of melioidosis in Vietnam, a disease caused by the soil bacterium Burkholderia pseudomallei, remains unclear. This study aimed to detect paediatric melioidosis in South Vietnam and describe clinical features and the geographic distribution.

METHODS

We introduced a simple laboratory algorithm for detecting B. pseudomallei from clinical samples at Children's Hospital 2 in Ho Chi Minh City in July 2015. A retrospective observational study of children <16 y of age with culture-confirmed melioidosis between July 2015 and August 2019 was undertaken.

RESULTS

Thirty-five paediatric cases of melioidosis were detected, with cases originating from 13 of 32 provinces and cities in South Vietnam. The number of paediatric melioidosis cases detected from a certain region correlated with the overall number of inpatients originating from the respective geographic area. Suppurative parotitis (n=15 [42.8%]) was the most common clinical presentation, followed by lung infection (n=10 [28.6%]) and septicaemia (n=7 [20%]). Fourteen (40%) children had disseminated disease, including all cases of lung infection, four cases with central nervous system symptoms and four (11.4%) deaths.

CONCLUSIONS

The patients' origin indicates a wide distribution of melioidosis in South Vietnam. It seems probable that cases not only in children, but also in adults, remain grossly undiagnosed. Further awareness raising and laboratory capacity strengthening are needed in this part of the country.

Blood exchange transfusion in viral hepatitis in a small infant: a case report

We report a case of blood exchange transfusion to treat acute liver failure following hepatitis B infection at the Infectious Disease Department of Children's Hospital No.2 in Ho Chi Minh City, Vietnam. A 3.5-month old baby boy was admitted to the hospital with a presentation of progressively worsening jaundice for the past one month. The patient was diagnosed with hepatitis B infection with a positive HBV DNA quantitative assay. Plasma exchange was indicated in view of progressive liver failure and gradually increasing hepatic coma. However, it was impossible to perform plasmapheresis in this case because the patient was small (in terms of age and weight) and there was no suitable plasma exchange filter. Accordingly, the patient was treated with 3 times of blood exchange transfusion in combination with an antiviral drug, lamivudine. After each blood exchange transfusion, the biochemical values (bilirubin, liver enzymes, and coagulation profile) gradually improved and he was discharged after 1 month of treatment. Blood exchange transfusion is an effective procedure for managing acute liver failure, where plasma exchange is not possible while waiting for the recovery of liver functions or liver transplantation.

Peanut allergy

Peanut allergy is acute and severe with symptoms of immediate hypersensitivity. This allergy is very common, affecting 1% of preschoolers. The incidence has increased with succeeding generations, and is possibly due to the increasing exposure of children to peanuts at a young age. Diagnosis is via history, skin prick test, and serum IgE level. The mainstay of therapy is avoidance. Treatment of anaphylaxis includes epinephrine and antihistamines. Children usually will not outgrow this food allergy. Novel treatment with rush immunotherapy and enzyme-potentiated desensitization is not currently acceptable. We describe a 27-month-old Asian boy with a typical presentation of peanut hypersensitivity. A good understanding of the epidemiology of this illness is necessary for treatment and prevention.