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Outpatient antibiotic therapy an option for paediatric cellulitis

Roshini Claire Anthony
03 Apr 2019

Children with moderate-to-severe uncomplicated cellulitis could be treated with intravenous (IV) antibiotics at home rather than in the hospital, results of the CHOICE* trial show.

“Findings from our study provide robust evidence that children with moderate-to-severe cellulitis can be effectively treated at home without the need for hospital admission,” said the researchers. Furthermore, the low incidence of adverse events (AEs) pointed to the safety of this regimen, they said.

Study participants were 190 children aged 6 months to 18 years with uncomplicated moderate-to-severe cellulitis who presented at the emergency department (ED) of The Royal Children’s Hospital in Melbourne, Victoria, Australia, between January 2015 and June 2017. They were randomized 1:1 to receive IV ceftriaxone at home (50 mg/kg QD; mean age 7.01 years, 60 percent male) or IV flucloxacillin in the hospital (50 mg/kg every 6 hours; mean age 7.08 years, 48 percent male), with the first dose of antibiotic administered in the ED.

At-home IV ceftriaxone was noninferior to in-hospital IV flucloxacillin, with two patients in the at-home group experiencing treatment failure** compared with seven patients in the hospital group (2 percent vs 7 percent, risk difference, -5.3 percent, 95 percent confidence interval [CI], -11.3 to 0.8; p=0.088). [Lancet Infect Dis 2019;doi:10.1016/S1473-3099(18)30729-1]

The results were similar among patients who received allocated treatment without major protocol violations (per-protocol population; 1 percent [at-home group] vs 8 percent [in-hospital group], risk difference, -6.5 percent, 95 percent CI, -12.4 to -0.7; p=0.029).

AE incidence was significantly lower among patients treated at home than in hospital (2 percent vs 11 percent; p=0.048), while the incidence of re-presentation to the ED within 14 days (2 percent in each group; p=0.98) and on-treatment complications (6 percent in each group; p=0.99) was comparable between groups.

Patients treated at home had slightly longer duration of IV antibiotic treatment than those treated in the hospital (2.2 vs 1.7 days; p=0.045), though total treatment duration – including oral antibiotics after IV antibiotics – was similar between groups (8.1 vs 8.3 days; p=0.73). Quality of life outcomes favoured the at-home antibiotic group.

According to the researchers, the increase in outpatient parenteral antibiotic therapy (OPAT) in children has been driven by “increased awareness among clinicians” on the poorer quality of life, increased risk of hospital-acquired infections, and higher cost associated with in-hospital vs at-home therapy.

However, questions remain as to whether the pros of OPAT outweigh the cons of ceftriaxone use, chiefly, the potential for antibiotic resistance, they said.

In the subgroup that provided blood, nasal, or stool samples, there was no significant difference in the incidence of ESBL***-producing bacteria or Clostridium difficile between groups at baseline, or 7–14 days, 3 months, or newly acquired following IV antibiotics. There were also no cases of newly acquired methicillin-resistant Staphylococcus aureus (MRSA).

Despite no increase in antibiotic resistance with ceftriaxone, the researchers cautioned that these findings, particularly that for MRSA, might be limited to locations with a low prevalence of paediatric antibiotic resistance.

As the study design was aimed at ensuring “best practice and translatability”, it is uncertain if the location or type of antibiotic contributed to the findings in this study, they added.

“Differences between ceftriaxone and flucloxacillin in effectiveness against common pathogens causing cellulitis, burden of administration, and side effects have the potential to contribute to differences in clinical outcomes,” said Drs Nathan Krah and Adam Hersh from the University of Utah, Salt Lake City, Utah, US, in a commentary. [Lancet Infect Dis 2019;doi:10.1016/S1473-3099(19)30043-X]

Krah and Hersh also advocated for the use of “oral therapy whenever possible” and encouraged further study into identifying other paediatric infectious diseases that could potentially be treated with at-home therapy.

 

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Most Read Articles
Pearl Toh, 10 Oct 2019
Adding a LAMA* to the double combination therapy of ICS** plus LABA*** in a single inhaler improves lung function and reduces exacerbations in patients whose asthma is inadequately controlled with the combination treatment, according to the TRIMARAN and TRIGGER# studies presented at ERS 2019.
4 days ago
Eating alone may help in weight management as findings of a recent study suggest that eating with friends lead to higher food intake.
Tristan Manalac, 3 days ago
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Jairia Dela Cruz, 3 days ago
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