Longitudinal outcomes of Haemophilus influenzae meningitis in school-age children

Bacterial Meningitis in Children: Neurological Complications, Associated Risk Factors, and Prevention

Bacterial meningitis is a devastating infection, with a case fatality rate of up to 30% and 50% of survivors developing neurological complications. These include short-term complications such as focal neurological deficit and subdural effusion, and long-term complications such as hearing loss, seizures, cognitive impairment and hydrocephalus. Complications develop due to bacterial toxin release and the host immune response, which lead to neuronal damage. Factors associated with increased risk of developing neurological complications include young age, delayed presentation and Streptococcus pneumoniae as an etiologic agent. Vaccination is the primary method of preventing bacterial meningitis and therefore its complications. There are three vaccine preventable causes: Haemophilus influenzae type b (Hib), S. pneumoniae, and Neisseria meningitidis. Starting antibiotics without delay is also critical to reduce the risk of neurological complications. Additionally, early adjuvant corticosteroid use in Hib meningitis reduces the risk of hearing loss and severe neurological complications.

Enterovirus A71 neurologic complications and long-term sequelae

During recent 20 years, enterovirus A71 (EV-A71) has emerged as a major concern among pediatric infectious diseases, particularly in the Asia-Pacific region. The clinical manifestations of EV-A71 include uncomplicated hand, foot, and mouth disease, herpanina or febrile illness and central nervous system (CNS) involvement such as aseptic meningitis, myoclonic jerk, polio-like syndrome, encephalitis, encephalomyelitis and cardiopulmonary failure due to severe rhombencephalitis. In follow-up studies of patients with EV-A 71 CNS infection, some still have hypoventilation and need tracheostomy with ventilator support, some have dysphagia and need nasogastric tube or gastrostomy feeding, some have limb weakness/astrophy, cerebellar dysfunction, neurodevelopmental delay, lower cognition, or attention deficiency hyperactivity disorder. Long term sequelae may be related to greater severity of CNS involvement or neuron damage, hypoxia and younger age of onset.

Executive functioning profiles from the BRIEF across pediatric medical disorders: Age and diagnosis factors

The objective of the study was to compare executive functioning (EF) profiles across several pediatric medical conditions and explore the influence of age of diagnosis and evaluation. A retrospective, cross-sectional study of 734 children aged 5 to 18 years was conducted across five medical groups (brain tumor, leukemia [ALL], epilepsy [EPI], neurofibromatosis type 1 [NF1], and ornithine transcarbamylase deficiency [OTC-D]), attention deficit hyperactivity disorder (ADHD) controls, and matched healthy controls. We compared groups across the scales of a parent-completed Behavior Rating Inventory of Executive Functioning (BRIEF) using a repeated measures analysis of variance (ANOVA). Separate ANOVAs were conducted to look at age factors. The results showed that the ADHD group differed from all other groups and had the highest level of reported EF problems. The NF1 and OTC-D groups differed significantly from the healthy comparison group for overall EF problems, while the EPI and cancer groups did not. Working memory was the most elevated scale across medical groups, followed by plan/organize. Children with medical disorders were two to four times more likely than healthy controls to have clinically significant problems in several EF domains. There was a main effect for age at diagnosis and age at evaluation. A subset of children with medical disorders were found to have parent-reported EF difficulties, with particular vulnerability noted in working memory and organizational/planning skills. This has relevance for the development of interventions that may be helpful across disorders. Children with particular diagnoses and earlier age of diagnosis and evaluation had greater reported EF problems.

Survivors of septic shock caused by Neisseria meningitidis in childhood: psychosocial outcomes in young adulthood

OBJECTIVE

To investigate long-term psychosocial outcomes in young adults who survived septic shock caused by Neisseria meningitidis (meningococcal septic shock) during childhood.

DESIGN

A cross-sectional study.

SETTING

The psychological investigation took place in the department of Child and Adolescent Psychiatry of the Erasmus MC-Sophia Children's Hospital.

PATIENTS

All consecutive surviving patients with meningococcal septic shock requiring intensive care treatment at the pediatric intensive care unit between 1988 and 2001.

INTERVENTION

To explore biographical characteristics (such as living conditions, educational, occupational, and marital status) and illness-related physical or social consequences a structured interview was used. To assess intellectual functioning the Groninger Intelligence Test 2 was used and to assess behavioral/emotional problems, the Adult Self-Report was used.

MEASUREMENTS AND MAIN RESULTS

Fifty-eight of 83 eligible septic shock survivors were evaluated (response rate: 70%). The patients were 16-31 yrs old at time of follow-up (median age: 21 yrs old). These patients had had meningococcal septic shock before 18 yrs of age. Median follow-up interval was 13 yrs, with a range of 4 to 16 yrs. For the vast majority of meningococcal septic shock patients, outcomes on biographical characteristics, intellectual functioning, and levels of behavioral/emotional problems were comparable to those of reference groups. A minority (5% to 20%) still report illness-related physical or social consequences, behavioral and emotional problems, and lower intellectual functioning.

CONCLUSIONS

Despite favorable outcomes for the majority of meningococcal septic shock patients in the long term, an important minority (5% to 20%) still struggles with ongoing problems as to behavioral/emotional problems, intellectual functioning, biographical characteristics, and illness-related physical or social consequences.

Cognitive development after traumatic brain injury in young children

The primary aims of this study were to examine post-injury cognitive development in young children with traumatic brain injury (TBI) and to investigate the role of the proximal family environment in predicting cognitive outcomes. Age at injury was 3-6 years, and TBI was classified as severe (n = 23), moderate (n = 21), and complicated mild (n = 43). A comparison group of children who sustained orthopedic injuries (OI, n = 117) was also recruited. Child cognitive assessments were administered at a post-acute baseline evaluation and repeated at 6, 12, and 18 months post-injury. Assessment of the family environment consisted of baseline measures of learning support and stimulation in the home and of parenting characteristics observed during videotaped parent-child interactions. Relative to the OI group, children with severe TBI group had generalized cognitive deficiencies and those with less severe TBI had weaknesses in visual memory and executive function. Although deficits persisted or emerged across follow-up, more optimal family environments were associated with higher scores for all injury groups. The findings confirm other reports of poor recovery of cognitive skills following early childhood TBI and suggest environmental influences on outcomes.

Attention-deficit/hyperactivity-related symptoms among children with enterovirus 71 infection of the central nervous system

BACKGROUND

No study has investigated the association between enterovirus 71 central nervous system infection and symptoms related to attention-deficit/hyperactivity disorder. In this study we evaluated attention-deficit/hyperactivity disorder-related symptoms and internalizing problems as long-term sequelae resulting from enterovirus 71 central nervous system infection in children.

METHODS

We enrolled 86 children 4 to 16 years old with virus-culture-confirmed enterovirus 71 infection and central nervous system involvement diagnosed 3 to 7 years before the study and 172 control subjects, matched for age, gender, and parents' education levels. Their mothers and teachers were asked to report on possible attention-deficit/hyperactivity disorder-related symptoms, and their mothers were asked to report on possible internalizing problems. All of the children previously infected with enterovirus 71 received intelligence tests.

RESULTS

Forty-two (49%) of the children previously infected with enterovirus 71 had had viral meningitis; 35 (41%) had severe central nervous system involvement, such as encephalitis, poliomyelitis-like syndrome, or encephalomyelitis; and 9 (10%) had cardiopulmonary failure and central nervous system involvement. The children previously infected with enterovirus 71 had higher scores than matched control subjects on teacher- and mother-rated scales of inattention, hyperactivity-impulsivity, oppositional symptoms, and attention-deficit/hyperactivity disorder index. The rate of elevated attention-deficit/hyperactivity disorder-related symptoms among children with enterovirus 71 central nervous system infection was 20%, whereas that rate among matched control subjects was only 3%. They also had more internalizing problems. Their verbal and performance IQs, as well as verbal comprehension indices, were significantly inversely correlated with symptoms of inattention, hyperactivity-impulsivity, and attention-deficit/hyperactivity disorder index scores.

CONCLUSIONS

Enterovirus 71 central nervous system infection may affect long-term regulation of attention and emotion and cause hyperactivity-impulsivity in children.

Behaviour is not really at risk after surviving meningitis in childhood

AIM

To examine behaviour problems, personality, self-perceived competence and academic deficits in children who had recovered from non-Haemophilus influenzae type b (Hib) bacterial meningitis (BM) without obvious medical sequelae.

METHODS

Assessments in 182 children, mean age 10 (range 5-14) years, 4-10 years after surviving meningitis, were compared to scores of norm reference groups.

RESULTS

More children were estimated to have academic deficits (27%) than behaviour problems as perceived by the parents (9%). The mean deviation from normal was absent to moderate on behaviour problems, personality variables and self-perceived competence.

CONCLUSION

Children who survived non-Hib BM without severe medical sequelae hardly differ from normal children with respect to personality and self-perceived competence. A small proportion deviates from normal in behaviour problems.

Neurodevelopment and cognition in children after enterovirus 71 infection

BACKGROUND

Enterovirus 71 is a common cause of hand, foot, and mouth disease and encephalitis in Asia and elsewhere. The long-term neurologic and psychiatric effects of this viral infection on the central nervous system (CNS) are not well understood.

METHODS

We conducted long-term follow-up of 142 children after enterovirus 71 infection with CNS involvement - 61 who had aseptic meningitis, 53 who had severe CNS involvement, and 28 who had cardiopulmonary failure after CNS involvement. At a median follow-up of 2.9 years (range, 1.0 to 7.4) after infection, the children received physical and neurologic examinations. We administered the Denver Developmental Screening Test (DDST II) to children 6 years of age or younger and the Wechsler intelligence test to children 4 years of age or older.

RESULTS

Nine of the 16 patients with a poliomyelitis-like syndrome (56%) and 1 of the 5 patients with encephalomyelitis (20%) had sequelae involving limb weakness and atrophy. Eighteen of the 28 patients with cardiopulmonary failure after CNS involvement (64%) had limb weakness and atrophy, 17 (61%) required tube feeding, and 16 (57%) required ventilator support. Among patients who underwent DDST II assessment, delayed neurodevelopment was found in only 1 of 20 patients (5%) with severe CNS involvement and in 21 of 28 patients (75%) with cardiopulmonary failure (P<0.001 for the overall comparison). Children with cardiopulmonary failure after CNS involvement scored lower on intelligence tests than did children with CNS involvement alone (P=0.003).

CONCLUSIONS

Enterovirus 71 infection with CNS involvement and cardiopulmonary failure may be associated with neurologic sequelae, delayed neurodevelopment, and reduced cognitive functioning. Children with CNS involvement without cardiopulmonary failure did well on neurodevelopment tests. (ClinicalTrials.gov number, NCT00172393 [ClinicalTrials.gov].).

Interpersonal stressors and resources as predictors of parental adaptation following pediatric traumatic injury

The authors examined the relationship of preinjury interpersonal resources and stressors to parental adaptation following pediatric traumatic brain injury (TBI) and orthopedic injury. Parents of children with severe TBI (n = 53), moderate TBI (n = 56), and orthopedic injuries (n = 80) were assessed soon after injury, 6 and 12 months after the initial evaluation, and at an extended follow-up with a mean of 4 years postinjury. General linear model analyses provide support for both main and moderating effects of stressors and resources on parental adjustment. Support from friends and spouse was associated with less psychological distress, whereas family and spouse stressors were associated with greater distress. The results also reveal a marked decline in injury-related stress over follow-up for families in the severe TBI group who reported a combination of high stressors and high resources. The decline suggests that interpersonal resources attenuated long-term family burden because of severe TBI. The findings are discussed in terms of their implications for intervention following TBI.

Long-term neuropsychological outcomes of very low birth weight: associations with early risks for periventricular brain insults

Few follow-up studies of children with very low birth weight (VLBW, <1,500 g) have examined neuropsychological sequelae at later ages or neonatal risks as predictors of these outcomes. The present study assessed cognitive skills at mean age 16 years in 48 participants with <750 g birth weight, 47 with 750-1,499 g birth weight, and 52 term-born controls. Our major objectives were to delineate the long-term cognitive consequences of VLBW, and to determine if risks for periventricular brain insults accounted for variations in outcomes. Analysis revealed poorer outcomes for the <750 g group than for term-born controls on nearly all measures, with specific impairments in visual-motor skills, spatial memory, and executive function. Predictors of outcome for participants with VLBW included lower birth weight, lower weight for gestational age, and a longer period of oxygen requirement for chronic lung disease. The longer-term consequences of VLBW are consistent with expectations based on early brain pathology and suggest limitations to functional plasticity.

Attention function after childhood stroke

We investigated attentional outcome after childhood stroke and orthopedic diagnosis in medical controls. Twenty-nine children with focal stroke lesions and individually matched children with clubfoot or scoliosis were studied with standardized attention and neuroimaging assessments. Stroke lesions were quite varied in location and commonly involved regions implicated in Posner's model of attention networks. Children with stroke lesions performed significantly more poorly regarding attention function compared with controls. Performance on the Starry Night, a test demanding alerting and sensory-orienting but not executive attention function, was significantly associated with lesion size in the alerting and sensory-orienting networks but not the executive attention network. Furthermore, earlier age at lesion acquisition was significantly associated with poorer attention function even when lesion size was controlled. These findings support the theory of dissociable networks of attention and add to evidence from studies of children with diffuse and focal brain damage that early insults are associated with worse long-term outcomes in many domains of neuropsychological function. In addition, these results may provide clues towards the understanding of mechanisms underlying attention in children.

Longitudinal outcomes of very low birth weight: neuropsychological findings

To investigate the effects of very low birth weight (VLBW, &1500 g) on the development of neuropsychological skills, we assessed 67 children with birth weight <750 g, 64 with birth weight 750-1499 g, and 67 term-born controls. Growth modeling of raw scores from mean ages 7-14 years revealed persistent VLBW sequelae. Even when adjusting for IQ, the <750 g group scored more poorly than the term-born group on measures of language processing, verbal list learning, and perceptual-motor and organizational abilities. This group also made slower age-related progress than the control group on tests of perceptual-motor and executive functions. Environmental factors moderated group differences in change on other cognitive measures. These results revealed further evidence for slower skill development in both VLBW groups relative to controls, as well as"catch-up" growth in the 750-1499 g group on some measures. The findings suggest age-related changes in the cognitive sequelae of VLBW that depend on the skill assessed, the degree of VLBW, and environmental factors.

Parental perception of educational, behavioural and general health problems in school-age survivors of bacterial meningitis

AIM

To determine the occurrence of educational, behavioural and general health problems in Dutch school-age survivors of bacterial meningitis.

METHODS

A cohort of 680 school-age survivors of meningitis caused by the most common Gram-positive and Gram-negative bacteria was established approximately 6y after the children's illness. Children with Haemophilus influenzae type b (Hib) meningitis were excluded because this form of the disease has virtually disappeared. Parents completed questionnaires on educational, behavioural and general health problems. The reference group comprised 304 school-age siblings and peers.

RESULTS

Postmeningitic children were more likely than controls to under achieve at school: 20% vs 5% (odds ratio 5.6; 95% confidence interval 3.0-10.7). The postmeningitic children repeated a year twice as often as the children in the reference group (16% vs 8%, odds ratio: 2.5, 95% confidence interval 1.5-4.2) and were referred to a special-needs school four times more frequently (8% vs 2%, odds ratio: 5.5; 95% confidence interval 2.0-15.4). Parents also reported more behavioural problems at home. More than half of the postmeningitic children experienced general health problems. The causative pathogen or age at infection had no influence on the relative frequency of educational and behavioural problems, and reduced auditory functioning played only a small part in these problems.

CONCLUSION

Parents perceive educational, behavioural and general health problems in more than 30% of postmeningitic children. Until it is clear which children are at highest risk of developing these problems, it will be necessary to follow postmeningitic children into their school-age years.

Effects on brain development leading to cognitive impairment: a worldwide epidemic

This article reviews causes of cognitive impairment in children with a focus on those in developing countries. The number of children with cognitive limitations is increasing, and for the majority there is little access to professional expertise. Causes include malnutrition, genetic diseases, infectious diseases such as meningitis, parasites, and cerebral malaria, in utero drug and alcohol exposure, newborn asphyxia, low birth weight, head injuries, and endocrine disorders. Many of these are preventable; however, resources for prevention are limited in most developing areas of the world. The challenge for this century is to encourage community leaders and government officials to take on the prevention of cognitive impairment as the highest priority for society. This article proposes that specialists in child behavior and development work with United Nations agencies to develop a "world cognitive impairment watch" to assess and assist each country annually in terms of risk factors, prevention programs, and early intervention programs.

Gender differences in learning and memory after pediatric traumatic brain injury

Thirty boys and 30 girls who sustained a traumatic brain injury (TBI) were evaluated within 1 year post injury with the California Verbal Learning Test-children's Version (CVLT-C; D. C. Delis, J. H. Kramer, E. Kaplan, & B. A. Ober, 1994). Boys had statistically significantly lower performance on the CVLT-C than girls in the absence of statistically significant group differences on various demographic and neurological variables. Although the effect size for this difference was modest (eta2 = .09), gender accounted for a statistically significant amount of the variance (5%) in CVLT-C scores in addition to effects of injury severity and age. It is concluded that male gender is associated with an increased risk for retrieval deficits after pediatric TBI, possibly because of reduced speed or efficiency of information processing.

A prospective study of short- and long-term outcomes after traumatic brain injury in children: behavior and achievement

Longitudinal behavior and achievement outcomes of traumatic brain injury (TBI) were investigated in 53 children with severe TBI, 56 children with moderate TBI, and 80 children with orthopedic injuries not involving brain insult. Measures of preinjury child and family status and of postinjury achievement skills were administered shortly after injury. Assessments were repeated 3 times across a mean follow-up interval of 4 years. Results from mixed model analysis revealed persisting sequelae of TBI. Recovery of math skills was observed in the severe TBI group but only for children from less stressed families. Social disadvantage in children with TBI predicted more adverse behavioral sequelae and less favorable changes in some outcome measures. The findings suggest that pediatric TBI has long-term effects on behavior and achievement but that postinjury progress is influenced by the family environment.

A comparison of administration procedures for the Rey-Osterrieth Complex Figure: flowcharts versus pen switching

The Rey-Osterrieth Complex Figure (ROCF) is commonly used to assess visuospatial skills, visuoconstruction, visual memory, and executive functioning. Two different methods are traditionally used to record the order in which the figure is drawn: the flowchart method and the pen-switching method. Although it has been suggested that pen switching may interfere with performance, to date no research has been conducted to assess whether ROCF performance significantly differs due to administration method. As part of routine neuropsychological evaluation, 100 inpatients and outpatients were randomly assigned to either method. Using the Boston Qualitative Scoring System and the traditional 36-point scoring method, the authors unexpectedly found that the pen-switching group generally performed better than the flowchart group, and productions drawn with pen switching were also significantly faster to score.