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Clinical Trial Summary

Children with severe malnutrition who are admitted sick to hospitals have a high mortality, usually because of infection. All children with severe malnutrition admitted to hospitals are treated with antibiotics. However, policymakers are not sure that the current antibiotics are the most effective. It is possible that the antibiotics that are currently used as second-line should be used first. Finding this out will need a large trial comparing different antibiotics. To prepare for such a trial the investigators first want to make sure that the doses given are correct for malnourished children. The investigators also want to check whether malnourished children more commonly carry resistant bacteria in their feces than well-nourished children. The study is important because the types of antibiotics and the doses needed to fight infection may be different in malnourished children because of the changes in their body due to malnutrition and the types of bacteria present.


Clinical Trial Description

Children with complicated severe acute malnutrition (SAM) admitted to hospital in sub-Saharan Africa have an inpatient case fatality of 10 to 20%. Because children with SAM may not exhibit the usual signs of infection, World Health Organization (WHO) guidelines recommend routine antibiotics. However this is based on "low quality evidence". There is evidence from Centre for Geographic Medical Research - Coast (CGMR-C), Kilifi and from other centres in Africa that bacterial resistance to the currently recommended first-line antibiotics (gentamicin plus ampicillin or penicillin) may be a problem. It is possible that because of frequent illness and antibiotic exposure, malnourished children may be more likely to have resistant bacteria. Some hospitals in Africa are already increasing use of ceftriaxone as a first-line treatment. However, this is not based on any data that ceftriaxone actually improves outcomes. Of concern is that ceftriaxone use may also lead to further problems with antimicrobial resistance, including inducing extended spectrum beta-lactamase (ESBL) and other classes of resistance.

A further area where evidence for policy is lacking is on the use of metronidazole in severely malnourished children. The WHO guidelines recommend "Metronidazole 7.5 mg/kg every 8 h for 7 days may be given in addition to broad-spectrum antibiotics; however, the efficacy of this treatment has not been established in clinical trials." Metronidazole is effective against Giardia, which is common amongst children with SAM; and against other anaerobic infections, including small bowel bacterial overgrowth and Clostridium difficile colitis. Small cohort studies suggest there may be benefits for nutritional recovery. In Jamaica, half of the children admitted for nutritional rehabilitation had evidence of small bowel anaerobic bacterial overgrowth and this was improved by metronidazole. However, metronidazole can cause nausea and anorexia, potentially impairing recovery from malnutrition and may also cause liver and neurological toxicity. One small study of metronidazole in children with SAM conducted in in Mexico reported significantly prolonged clearance in SAM, without symptomatic toxicity, but suggesting a dosing frequency reduction. Overall, very few pharmacokinetic studies have been done in malnourished children. Changes in body composition as well as metabolic and drug elimination mechanisms may alter the potential toxicity or effective dose.

The investigators are planning a large clinical trial to assess the efficacy of ceftriaxone and metronidazole on mortality, nutritional recovery and antimicrobial resistance in sick, severely malnourished children. This preparatory work aims to determine the pharmacokinetics of ceftriaxone and metronidazole in 80 severely malnourished children who are admitted to three hospitals in Kenya in order to ensure dosing for the main trial is safe and in the therapeutic range. The study will also determine the frequency of faecal carriage of antimicrobial resistant enteric bacteria at presentation to hospital and at discharge following exposure to antibiotics and the hospital environment, comparing 360 children with, and 360 children without severe malnutrition at three different hospitals. Clear data on the benefits, risks and pharmacokinetics of these antimicrobials will influence policy on case management and antimicrobial stewardship in this vulnerable population. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT02746276
Study type Interventional
Source University of Oxford
Contact
Status Active, not recruiting
Phase Phase 2
Start date April 1, 2016
Completion date September 30, 2017

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