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Use WPMLClinical indicators of bacterial meningitis among neonates and young infants in rural Kenya
BACKGROUND: Meningitis is notoriously difficult to diagnose in infancy because its clinical features are non-specific. World Health Organization (WHO) guidelines suggest several indicative signs, based on limited data. We aimed to identify indicators of bacterial meningitis in young infants in Kenya, and compared their performance to the WHO guidelines. We also examined the feasibility of developing a scoring system for meningitis. METHODS: We studied all admissions aged < 60 days to Kilifi District Hospital, 2001 through 2005. We evaluated clinical indicators against microbiological findings using likelihood ratios. We prospectively validated our findings 2006 through 2007. RESULTS: We studied 2,411 and 1,512 young infants during the derivation and validation periods respectively. During derivation, 31/1,031 (3.0%) neonates aged < 7 days and 67/1,380 (4.8%) young infants aged 7-59 days (p < 0.001) had meningitis. 90% of cases could be diagnosed macroscopically (turbidity) or by microscopic leukocyte counting. Independent indicators of meningitis were: fever, convulsions, irritability, bulging fontanel and temperature >/= 39 degrees C. Areas under the receiver operating characteristic curve in the validation period were 0.62 [95%CI: 0.49-0.75] age < 7 days and 0.76 [95%CI: 0.68-0.85] thereafter (P = 0.07), and using the WHO signs, 0.50 [95%CI 0.35-0.65] age < 7 days and 0.82 [95%CI: 0.75-0.89] thereafter (P = 0.0001). The number needed to LP to identify one case was 21 [95%CI: 15-35] for our signs, and 28 [95%CI: 18-61] for WHO signs. With a scoring system, a cut-off of >/= 1 sign offered the best compromise on sensitivity and specificity. CONCLUSION: Simple clinical signs at admission identify two thirds of meningitis cases in neonates and young infants. Lumbar puncture is essential to diagnosis and avoidance of unnecessary treatment, and is worthwhile without CSF biochemistry or bacterial culture. The signs of Meningitis suggested by the WHO perform poorly in the first week of life. A scoring system for meningitis in this age group is not helpful.
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Congenital and neonatal malaria in a rural Kenyan district hospital: an eight-year analysis
BACKGROUND: Malaria remains a significant burden in sub-Saharan Africa. However, data on burden of congenital and neonatal malaria is scarce and contradictory, with some recent studies reporting a high burden. Using prospectively collected data on neonatal admissions to a rural district hospital in a region of stable malaria endemicity in Kenya, the prevalence of congenital and neonatal malaria was described. METHODS: From 1st January 2002 to 31st December 2009, admission and discharge information on all neonates admitted to Kilifi District Hospital was collected. At admission, blood was also drawn for routine investigations, which included a full blood count, blood culture and blood slide for malaria parasites. RESULTS: Of the 5,114 neonates admitted during the eight-year surveillance period, blood slide for malaria parasites was performed in 4,790 (93.7%). 18 (0.35%) neonates with Plasmodium falciparum malaria parasitaemia, of whom 11 were admitted within the first week of life and thus classified as congenital parasitaemia, were identified. 7/18 (39%) had fever. Parasite densities were low,
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Invasive bacterial infections in neonates and young infants born outside hospital admitted to a rural hospital in Kenya
BACKGROUND: Bacterial sepsis is thought to be a major cause of young infant deaths in low-income countries, but there are few precise estimates of its burden or causes. We studied invasive bacterial infections (IBIs) in young infants, born at home or in first-level health units ("outborn") who were admitted to a Kenyan rural district hospital during an 8-year period. METHODS: Clinical and microbiologic data, from admission blood cultures and cerebrospinal fluid cultures on all outborn infants aged less than 60 days admitted from 2001 to 2009, were examined to determine etiology of IBI and antimicrobial susceptibilities. RESULTS: Of the 4467 outborn young infants admitted, 748 (17%) died. Five hundred five (11%) had IBI (10% bacteremia and 3% bacterial meningitis), with a case fatality of 33%. The commonest organisms were Klebsiella spp., Staphylococcus aureus, Streptococcus pneumoniae, Group B Streptococcus, Acinetobacter spp., Escherichia coli, and Group A Streptococcus. Notably, some blood culture isolates were seen in outborn neonates in the first week of life but not in inborns: Salmonella, Aeromonas, and Vibrio spp. Eighty-one percent of isolates were susceptible to penicillin and/or gentamicin and 84% to ampicillin and/or gentamicin. There was a trend to increasing in vitro antimicrobial resistance to these combinations from 2008 but without a worse outcome. CONCLUSIONS: IBI is common in outborn young infants admitted to rural African hospitals with a high mortality. Presumptive antimicrobial use is justified for all young infants admitted to the hospital.
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The prognostic value of dipstick urinalysis in children admitted to hospital with severe malnutrition
BACKGROUND: Children with severe malnutrition (SAM) present to hospital with an array of complications, resulting in high mortality despite adherence to WHO guidelines. Diagnostic resources in developing countries are limited and bedside tests could help identify high-risk children. Dipstick urinalysis is a bedside screening test for urinary tract infections (UTIs). UTIs are common in SAM and can lead to secondary invasive bacterial sepsis. Very few studies have examined the usefulness of dipstick screening of urine specimens in SAM and none has explored its prognostic value. PATIENTS AND METHODS: A 2-year prospective study on children admitted in Kilifi District Hospital, Kenya, with SAM. Freshly voided, clean catch urine samples were tested using Multistix reagent test strips. Positive samples were sent for culture. RESULTS: Of the 667 children admitted, 498 children (75%) provided urine samples; of these, 119 (24%) were positive for either leucocyte esterase (LE) or nitrites. Culture-proven UTI was detected in 28 children (6% overall). All isolates were coliforms and were >50% were resistant to cotrimoxazole and gentamicin. There was no difference in severity signs between those with positive dipstick and those without. Case fatality was higher among children with a positive dipstick (29% vs 12%). Presence of a positive dipstick was a strong predictor of mortality (adjusted HR 2.5). CONCLUSIONS: A urine dipstick positive for either LE or nitrites is a useful predictor of death in children admitted with SAM. Prospective studies to determine the role of untreated UTI in these deaths are needed before any treatment recommendations can be made.
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Hypothermia in children with severe malnutrition: low prevalence on the tropical coast of Kenya
Hypothermia is stated as a common complication of severe malnutrition although there are little primary data to support this. We performed a prospective study of children with severe acute malnutrition (SAM) admitted to a district hospital in Kenya. We documented the prevalence of hypothermia and examined its association with outcome and ambient temperature. During a 2-year period 667 children were recruited. Hypothermia was recorded in only 12 out of 15 191 (0.08%) temperature observations and as a single event in 12 children (2% of cases). There was no correlation with ambient temperature. Although mortality rates were higher in children with hypothermia (4/12, 33%) than those without (121/655, 18%), the timing of hypothermia did not coincide with clinical deterioration. Hypothermia was a rare marker of severity in our setting. We recommend that other observations be highlighted to identify high risk groups and that routine temperature observations be reduced wherever staff are few.
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