A follow-up study of children hospitalised with community-acquired pneumonia

OBJECTIVE

To investigate the outcome for children hospitalised with radiologically confirmed community-acquired pneumonia (CAP) DESIGN: Controlled follow-up study.

SETTING

Community based in Newcastle upon Tyne, North Tyneside and Northumberland schools.

PATIENTS

103 cases of radiologically confirmed CAP a median of 5.6 years (range 4.4-7.4) after admission to Newcastle General Hospital, matched for sex and school class to a mean of two controls (n = 248).

INTERVENTIONS

A respiratory questionnaire, clinical examination and spirometry measurements.

MAIN OUTCOME MEASURES

Multiple regression was used to describe associations between explanatory variables, including CAP, and outcome variables: forced expiratory volume in 1 s percent predicted (FEV(1) %), forced vital capacity percent predicted (FVC %), persistent cough, doctor diagnosis of asthma and abnormal chest shape.

RESULTS

Cases were 2.9 times more likely (95% CI 1.45 to 5.71, p = 0.020) than controls to have persistent cough and 5.5 times more likely to have an abnormal chest shape (95% CI 1.65 to 18.28, p = 0.005). Cases of an atopic parent had a 7.0% deficit in FEV(1) % predicted (95% CI -10.5 to -3.2, p<0.001) and a 4.4% deficit in FVC % predicted (95% CI -8.0 to -0.78, p = 0.017), but were not at increased risk of subsequent asthma. Cases of a non-atopic parent were at increased risk of subsequent asthma (OR 4.8, 95% CI 1.43 to 16.34, p = 0.011) but not of deficit in lung function.

CONCLUSIONS

CAP requiring admission to hospital is associated with deficits in lung function and persistent respiratory symptoms. This has implications for follow-up for which recommendations are currently lacking. Parental atopy may be a determinant of outcome.

Hypomagnesaemia in cystic fibrosis patients referred for lung transplant assessment

BACKGROUND

Hypomagnesaemia in patients with cystic fibrosis (CF) is under-recognized although the true incidence is unknown. Many patients are asymptomatic, although severe deficiency may be associated with muscle weakness, cramps and tetany. Hypomagnesaemia may be a risk factor for post-transplant complications including convulsions, which may be exacerbated by the use of calcineurin inhibitors. The aims of the present study were to describe serum magnesium levels and to investigate the relationship between magnesium levels and age, and renal function measurements in patients with CF referred to a transplant centre for lung transplant assessment.

METHODS

We reviewed the data of all 106 CF patients referred for transplant assessment from January 1995 to December 2003. Demographic and biochemical data were recorded and the explanatory variables were subjected to univariate analysis and linear regression analysis.

RESULTS

Mean serum magnesium level was 0.75 mmol/L (range 0.46-1.03, normal range 0.74-1.1). 57% of patients had hypomagnesaemia. Serum magnesium levels were not associated with age, serum creatinine or GFR.

CONCLUSIONS

Hypomagnesaemia is a common finding in patients with CF referred for lung transplant assessment. Serum magnesium levels should be monitored in all CF patients being referred for lung transplant irrespective of the results of other renal function tests.

Clinical features, aetiology and outcome of empyema in children in the north east of England

BACKGROUND

The incidence of empyema in children in the UK is increasing. The reason for this is unclear. A prospective study was undertaken to investigate the clinical features, aetiology, and outcome of cases of empyema and parapneumonic effusion presenting to a tertiary paediatric respiratory centre between February 1997 and August 2001.

METHOD

Routine bacterial culture of blood and pleural fluid was performed for 47 cases. Forty three pleural fluid specimens, culture negative for pneumococcus, were analysed for pneumococccal DNA by real time polymerase chain reaction (PCR). Penicillin susceptibility was determined for DNA positive specimens using complementary PCR assay. Capsular serotype specific antigen detection was by enzyme immunoassay (EIA) using monoclonal antibodies to serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F. Clinical data were obtained from patient notes, supplemented by a postal questionnaire.

RESULTS

The median (range) age of the patients was 5.6 (0.6-16.9) years and 70% were male. The median (range) duration of illness before referral to hospital was 5 (0-25) days. Forty five (96%) had received antibiotics before referral; 32 (68%) required decortication and eight (21%) thoracocentesis. Median postoperative stay was 4 days (2-8). Thirty two (75%) pneumococcal culture negative specimens were pneumococcal DNA positive; 17 (53%) of these were serotype 1. All were penicillin sensitive.

CONCLUSIONS

Pneumococcus is the major pathogen in childhood empyema and serotype 1 is the prevalent serotype. This has implications for vaccine development and immunisation strategy as the current 7-valent pneumococcal conjugate vaccine does not protect against serotype 1.

The need to redefine non-cystic fibrosis bronchiectasis in childhood

BACKGROUND

Non-cystic fibrosis (CF) bronchiectasis has previously been reported to be rare and progressive in children living in western societies.

METHOD

A clinical and radiological review was undertaken of 93 children with non-CF bronchiectasis defined by high resolution computed tomographic (HRCT) scanning presenting to a tertiary paediatric respiratory centre since 1996.

RESULTS

Cases constituted 9.6% of all new referrals. Male to female ratio was 2:1. Median age at symptom onset was 1.1 years (range 0-16) and of HRCT diagnosis was 7.2 years (1.6-18.8). The most common referral diagnosis of asthma was refuted in 39 of 45 cases. Associations were previous pneumonic illness (30%), immunocompromise (21%), obliterative bronchiolitis (9%), congenital lung abnormality (5%), chronic aspiration (3%), eosinophilic oesophagitis (2%), familial syndrome (2%), primary ciliary dyskinesia (1%), and right middle lobe syndrome (1%). 8% had two associated diagnoses and 18% were idiopathic. There was agreement between the chest radiograph and HRCT scan for diagnosis and lobe affected in only five cases (5%). A repeat HRCT scan in 18 cases at a minimum interval of 18 months showed total resolution of the changes in six, improvement in one, progression in five, and was unchanged in six.

CONCLUSIONS

Radiologically defined non-CF bronchiectasis in children is not uncommon. Diagnostic delay is a problem. The most common association is a previous pneumonia. Chest radiography is of little diagnostic value, but resolution is possible on HRCT scanning. Bronchiectasis is currently defined as a condition which is both permanent and progressive. This term is not necessarily appropriate for all paediatric patients for whom we suggest an alternative nomenclature.

A study of neonatal BCG immunization within an acute hospital trust

BACKGROUND

Tuberculosis is a re-emerging problem in the United Kingdom. BCG immunization administered in the neonatal period is protective. National guidelines and locally published standards identify infants for whom BCG immunization is recommended. The study aimed to calculate the rate of identification of infants 'at risk' by parental ethnic group and/or family history of tuberculosis, to determine subsequent immunization uptake, and to describe characteristics associated with missed BCG immunization.

METHODS

A retrospective audit was conducted. Demographic data were collected from a computer database of antenatal booking data, for 2043 pregnancies delivering between 1 October 1998 and 30 April 1999. A cohort of infants 'at risk' was defined, and infants referred for BCG immunization were identified. A manual search of immunization records determined immunization uptake.

RESULTS

A cohort of 247 (12 per cent pregnancies) was 'at risk'. Fifty-five per cent of the cohort 'at risk' was correctly identified and 42 per cent correctly identified and immunized. The largest subgroup of the cohort, 48 per cent, was Caucasian and at risk because of a positive family history of tuberculosis. Family history of tuberculosis was the most important risk factor, and was missed in 86 per cent of cases.

CONCLUSIONS

Despite the local publication of established guidelines, 58 per cent of infants 'at risk' failed to be immunized. Family history of tuberculosis was more important than parental ethnic group in predicting risk for the cohort, and was missed in the majority of cases. Appropriate guidelines alone do not guarantee good practice. Guidelines should be introduced in conjunction with regular audit to ensure effective implementation.

ARC syndrome: an expanding range of phenotypes

AIM

To describe the clinical phenotype in infants with ARC syndrome, the association of arthrogryposis, renal tubular acidosis, and cholestasis.

METHODS

The medical records for six patients with ARC syndrome were reviewed, presenting over 10 years to three paediatric referral centres.

RESULTS

All patients had the typical pattern of arthrogryposis. Renal Fanconi syndrome was present in all but one patient, who presented with nephrogenic diabetes insipidus. Although all patients had severe cholestasis, serum gamma glutamyltransferase values were normal. Many of our patients showed dysmorphic features or ichthyosis. All had recurrent febrile illnesses, diarrhoea, and failed to thrive. Blood films revealed abnormally large platelets.

CONCLUSIONS

ARC syndrome exhibits notable clinical variability and may not be as rare as previously thought. The association of Fanconi syndrome, ichthyosis, dysmorphism, jaundice, and diarrhoea has previously been reported as a separate syndrome: our observations indicate that it is part of the ARC spectrum.