The weather condition and epidemics as triggers for febrile seizure: A single-center retrospective observational study.

OBJECTIVE: The objective of this study was to investigate the association between the weather and epidemic condition and risk of febrile seizures (FSs) in Japan. STUDY DESIGN: This single-center, retrospective study included 560 children (age, 6-60 months) with FSs who were transported to our center by ambulance from January 2011 through December 2018. The weather (temperature, atmospheric pressure, relative air humidity, amount of rainfall, sunshine duration, and air concentration of nitrogen dioxide [NO2] and sulfur dioxide [SO2]) and epidemic (influenza virus infection, infectious gastroenteritis, and exanthem subitum) conditions in this region were compared between the periods (days or weeks) with the transportation of children with FS to our hospital and those without such transportation. RESULTS: In the univariate analyses, neither daily or weekly weather condition nor weekly epidemic condition was correlated to FS transportation. Furthermore, the multiple logistic regression analysis suggested that epidemic influenza virus infection (odds ratio [OR], 1.34; 95% confidence interval [CI], 1.08-1.73) and infectious gastroenteritis (OR, 1.64; 95% CI, 1.09-2.54) were the independent risk factors for FS occurrence and weather condition was not associated with FS risk. CONCLUSIONS: Febrile seizure incidence may be increased by epidemic febrile infections but not by weather condition.

Vitamin A deficiency-associated corneal perforation in a boy with autism spectrum disorder: A case report and literature review.

BACKGROUND: Malnutrition and vitamin deficiency are growing concerns in the clinical management of children with autism spectrum disorder (ASD). This case report presents a boy with ASD who developed vitamin A deficiency during follow-up. CASE REPORT: A 7-y-old boy had been diagnosed with ASD and developmental delay at age 18 mo. He developed convulsions associated with hypocalcemia and vitamin D deficiency at 3 y of age. Although vitamin D supplementation was continued, he was only able to eat rice, green tea, and fried potatoes from 3 y of age to age 7 y. He had started rubbing his eyes and had refused to open his eyes 9 mo before. An ophthalmologic examination showed bilateral corneal ulcers and right corneal perforation. Vitamin A was immediately supplemented with a nasogastric tube; however, his right eye was surgically enucleated against the persistent infection. LITERATURE REVIEW: A search of the relevant literature from 1993 to 2020 identified 11 cases of patients with ASD (5-17 y of age) who developed vitamin A deficiency owing to malnutrition. Only 4 cases (36%) had a full recovery in visual acuity. CONCLUSION: Vitamin A deficiency frequently causes irreversible visual impairment in children with ASD. Vigilant monitoring of vitamin levels prevents unfavorable outcomes in children with ASD and difficulty in food intake.

Change in the strategy for prophylactic diazepam use for febrile seizures and the impact on seizure recurrence within 24 h.

PURPOSE: To investigate the association between reduced prophylactic diazepam usage and short-term recurrence of febrile seizures (FSs) after the FS practice guideline was updated in Japan. METHOD: In this single-center, retrospective study, children (6-60 months of age) with FS who were transported to our center by ambulance from January 2011 through December 2018 were included. Rectal administration of diazepam (0.3-0.5 mg/kg) after the first seizure and seizure recurrence within 24 h were compared between 2011-2015 (pre-guideline revision) and 2016-2018 (post-guideline revision). RESULTS: Among the total of 509 children, 297 were transported to our hospital in 2011-2015 and 212 in 2016-2018. Rectal diazepam administration was decreased in 2016-2018 (17 %) compared to 2011-2015 (53 %, P < 0.0001), while seizure recurrence was increased in 2016-2018 (20 %) compared to 2011-2015 (12 %, P = 0.0087). Similarly, hospital revisits (23 %) and hospital admissions (26 %) were increased in 2016-2018 compared to 2011-2015 (15 %, P = 0.031 and 18 %, P = 0.026, respectively). Multiple logistic regression analyses showed that prophylactic diazepam administration was the only factor related to preventing seizure recurrence. FS recurrence after the initial seizure was significantly less frequent with diazepam use (6 %) than without diazepam use (21 %, P < 0.0001; relative risk reduction, 70 %; number needed to treat, 6.8 children). CONCLUSION: The FS practice guideline revision was associated with reduced prophylactic diazepam usage and increased FS recurrence within 24 h in Japan. Prophylactic diazepam use should be determined based on clinical safety, local health infrastructure, and parental anxiety.

Short-term neurodevelopmental outcomes of focal febrile seizures.

OBJECTIVE: The effect of complex febrile seizures (FS), specifically focal FS, on long-term neurodevelopmental outcome is not well known. The aim of this study was to assess the association between complex FS and neurodevelopmental outcome. METHODS: A single-center, retrospective, cohort study was performed. The study included 282 children aged 6-60 months who experienced FS. Of these, 61 (22%) experienced recurrent FS, 33 (12%) prolonged FS, and 17 (6%) focal FS. The effect of these complex FS on subsequent need for special neurodevelopmental support was investigated. The neurodevelopmental status after FS was evaluated by a questionnaire. RESULTS: During a median follow-up period of 3 years post FS, 12 children (4.3%) required special neurodevelopmental support. Univariate analysis demonstrated a significant association between focal FS and the need for subsequent special neurodevelopmental support, as well as a correlation between prolonged FS and pre-existing neurodevelopmental abnormality. Multiple logistic regression analysis demonstrated that focal FS (odds ratio [OR]: 12.27; 95% confidence interval [CI]: 2.11-71.22) and pre-existing neurodevelopmental abnormality (OR: 262; 95% CI: 17-3944) were significantly associated with the need for subsequent special support. CONCLUSION: An association was found between focal FS and subsequent neurodevelopmental impairment; therefore, close follow-up with particular attention to neurodevelopmental status is required for children who experience focal FS.