What to Do When First-Choice IV Antibiotics Have Not Worked for Acute Pyelonephritis in Children Aged 3 Months to Under 16 Years

This protocol applies to children aged 3 months and over and under 16 years with acute pyelonephritis who have not achieved the expected response to first-choice intravenous antibiotics within the treatment window.

Age group

Children aged 3 months to under 16 years with acute pyelonephritis who require intravenous treatment — either because oral antibiotics are not feasible or because the child is severely unwell.

Previous line & failure condition

The preceding treatment step involved first-choice intravenous antibiotics. The clinical goal of that line was improvement in response to treatment by 48 hours, allowing step-down to oral antibiotics.

Failure condition The expected improvement at 48 hours was not achieved and step-down to oral antibiotics was not possible — escalating the need for a second-choice intravenous approach.

Next step — treatment direction

When first-choice intravenous antibiotics have not produced the required response, the approach moves to second-choice intravenous antibiotics selected with input from a local microbiologist.

Partial overview Antibiotic selection at this stage takes into account local antimicrobial resistance data — the specific agent, regimen, and criteria for selection are detailed in the full structured protocol.

Instant Access to Structured Evidence-Based Regimens

References

Conditions: table 3 for children and young people under 16 years

Treatment: Consult a local microbiologist

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