Urinary tract infection (peds): Difference between revisions
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''This page is for pediatric patients; see [[Acute cystitis]] for adult patients.'' | ''This page is for pediatric patients; see [[Acute cystitis]] for adult patients.'' | ||
==Background== | ==Background== | ||
*E. coli is responsible for ~80% of UTIs | *Most common SBI, accounts for 5-8% of children presenting for fever without clear source | ||
*Associated with bacteremia in up to 30% of infants 4-8wk of age | |||
*[[E. coli]] is responsible for ~80% of UTIs | |||
*After 1yr of age, occult UTI with normal UA extremely rare | *After 1yr of age, occult UTI with normal UA extremely rare | ||
*After 2yr of age, UTI remains common in girls (but associated with symptoms) | *After 2yr of age, UTI remains common in girls (but associated with symptoms) | ||
*UTI in adolescent girl is suggestive of intercourse | *UTI in adolescent girl is suggestive of intercourse | ||
*Prevalence of UTI in [[bronchiolitis]] is only 0.8% based on 2019 meta-analysis, which is far lower than in previous studies, suggesting less need | *Prevalence of UTI in [[bronchiolitis]] is only 0.8% based on 2019 meta-analysis, which is far lower than in previous studies, suggesting less need for automatic testing for UTI in bronchiolitis<ref>McDaniel CE et al. Association of Diagnostic Criteria With Urinary Tract Infection Prevalence in Bronchiolitis: A Systematic Review and Meta-analysis. JAMA Pediatr. 2019;173(3):269-277. doi:10.1001/jamapediatrics.2018.5091.</ref> | ||
==Clinical Features== | ==Clinical Features== | ||
*Infants/young children: | *Infants/young children: [[fever (Peds)|fever]] without other source | ||
*Older children: | *Older children: | ||
**[[Dysuria]], frequency, or other urinary complaints | |||
**+/- [[abdominal pain (peds)|abdominal]]/[[back pain]] | |||
*UTI + [[fever (Peds)|fever]] = [[pyelonephritis]] | |||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
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==Evaluation== | ==Evaluation== | ||
*[https://uticalc.pitt.edu/ University of Pittsburgh UTI Calc] | |||
*[https://www.chop.edu/clinical-pathway/urinary-tract-infection-uti-febrile-clinical-pathway Children's Hospital of Philadelphia UTI pathway] | *[https://www.chop.edu/clinical-pathway/urinary-tract-infection-uti-febrile-clinical-pathway Children's Hospital of Philadelphia UTI pathway] | ||
===Labs=== | ===Labs=== | ||
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**Do not send urine bag specimen for culture when UA is negative and clinical suspicion is relatively low<ref>Kim GA and Koo JW. Validity of bag urine culture for predicting urinary tract infections in febrile infants: a paired comparison of urine collection methods. Korean J Pediatr. 2015 May; 58(5): 183–189.</ref> | **Do not send urine bag specimen for culture when UA is negative and clinical suspicion is relatively low<ref>Kim GA and Koo JW. Validity of bag urine culture for predicting urinary tract infections in febrile infants: a paired comparison of urine collection methods. Korean J Pediatr. 2015 May; 58(5): 183–189.</ref> | ||
***False positives are high due to bag contamination | ***False positives are high due to bag contamination | ||
<div><br></div><div> | <div><br></div><div> | ||
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==Management== | ==Management== | ||
*Know your local resistance patterns and make sure to send a urine culture | *Know your local resistance patterns and make sure to send a urine culture | ||
*Do not use [[nitrofurantoin]] in children (need bloodstream penetration) | |||
===<1mo=== | ===<1mo=== | ||
*Admit for IV [[antibiotics]] | *Admit for IV [[antibiotics]] | ||
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===1mo - 2yo=== | ===1mo - 2yo=== | ||
*[[Ceftriaxone]] | *[[Ceftriaxone]] 50mg/kg in ED | ||
*[[Cephalexin]] 50-100mg/kg/d in 4 divided doses x14d | |||
*[[Cephalexin]] | |||
**Maximum dose (all ages) 4g/24hr | **Maximum dose (all ages) 4g/24hr | ||
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*[[Amoxicillin]] | *[[Amoxicillin]] | ||
**Mild to moderate infections (>40kg): 500mg PO BID for x10-14d | **Mild to moderate infections (>40kg): 500mg PO BID for x10-14d | ||
*[[Cephalexin]] | *[[Cephalexin]] 50-100mg/kg/d in 4 divided doses x7d | ||
*[[Cefaclor]] 50-100 mg/kg/d divided in 3 doses x5d | |||
*[[Cefixime]] 8 mg/kg daily x 5d | |||
*[[Cefaclor]] | |||
*[[Cefixime]] | |||
===>13yr adolescent=== | ===>13yr adolescent=== | ||
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[[Category:Pediatrics]] | [[Category:Pediatrics]] | ||
[[Category:ID]] | |||
[[Category:Urology]] |
Revision as of 21:16, 6 October 2019
This page is for pediatric patients; see Acute cystitis for adult patients.
Background
- Most common SBI, accounts for 5-8% of children presenting for fever without clear source
- Associated with bacteremia in up to 30% of infants 4-8wk of age
- E. coli is responsible for ~80% of UTIs
- After 1yr of age, occult UTI with normal UA extremely rare
- After 2yr of age, UTI remains common in girls (but associated with symptoms)
- UTI in adolescent girl is suggestive of intercourse
- Prevalence of UTI in bronchiolitis is only 0.8% based on 2019 meta-analysis, which is far lower than in previous studies, suggesting less need for automatic testing for UTI in bronchiolitis[1]
Clinical Features
- Infants/young children: fever without other source
- Older children:
- UTI + fever = pyelonephritis
Differential Diagnosis
Pediatric Abdominal Pain
0–3 Months Old
- Emergent
- Nonemergent
3 mo–3 y old
- Emergent
- Nonemergent
3 y old–adolescence
- Emergent
- Nonemergent
Pediatric fever
- Upper respiratory infection (URI)
- UTI
- Sepsis
- Meningitis
- Febrile seizure
- Pneumonia
- Acute otitis media
- Whooping cough
- Unclear source
- Kawasaki disease
- Neonatal HSV
- Specific virus
Evaluation
Labs
- Urinalysis
- Obtain clean catch specimen OR cath UA
- Neg UA = neg LE, nit, GS & <5 WBC
- Bag urine results in 83% false positive; only useful if negative
- UTI diagnosis cannot be established reliably through bag urine culture (Evidence A; strong recommendation; AAP 2011)
- Obtain clean catch specimen OR cath UA
- Urine culture
- Send on all patients except for:
- 1. Low-risk patients with normal UA and another explanation for symptoms
- 2. Older adolescent females with very high post-test probability without severe illness
- 20% of +Urine culture will have negative UA
- Do not send urine bag specimen for culture when UA is negative and clinical suspicion is relatively low[2]
- False positives are high due to bag contamination
- Send on all patients except for:
Test Characteristic Ranges | Post-test Probability (%) of UTI in Different Patients | ||||||||
---|---|---|---|---|---|---|---|---|---|
Test | Sensitivity (%) | Specificity (%) | Test Result | LR | Patient A | Patient B | Patient C | Patient D | Patient E |
Leukocyte esterase | 67–85 | 81–92 | + | 3.5–10.6 | 21–45 | 2–5 | 23–49 | 20–43 | 26–52 |
– | 0.16–0.41 | 1–3 | <1 | 1–3 | 1–3 | 2–4 | |||
Nitrite* | 21–69 | 95–99 | + | 4.2–69 | 24–84 | 2–26 | 26–86 | 22–83 | 29–87 |
– | 0.31–0.83 | 2–6 | <1 | 3–7 | 2–5 | 3–8 | |||
Leukocytes on microscopy | 51–91 | 45–91 | + | 0.90–10.1 | 6–43 | 0–5 | 7–47 | 6–41 | 8–50 |
– | 0.10–1.09 | 1–8 | 0–1 | 1–9 | 1–7 | 1–10 | |||
Bacteria on microscopy | 46–96 | 11–96 | + | 0.5–24.0 | 4–64 | 0–11 | 4–68 | 3–63 | 5–70 |
– | 0.04–4.91 | <1–27 | <1–2 | <1–30 | <1–25 | <1–33 | |||
Bacteria on Gram stain | 80–97 | 87–99 | + | 6.2–97 | 32–88 | 3–33 | 35–89 | 30–87 | 38–91 |
– | 0.03–0.23 | <1–2 | <1 | <1–2 | <1–2 | <1–2 | |||
Combined tests | |||||||||
Any positive test on dipstick | 99–100 | 63–70 | + | 2.7–3.3 | 13–20 | 1–2 | 19–22 | 16–19 | 21–25 |
– | 0.00–0.02 | <1 | <1 | <1 | <1 | <1 |
Patient A: Female patient in ED, <1 year old, fever with no definitive source on examination, pretest probability of UTI is 7%.
Patient B: Male patient in ED, <1 year old, circumcised, fever with no definitive source on examination, pretest probability of UTI is 0.5%.
Patient C: Male patient in ED, <1 year old, uncircumcised, fever with no definitive source on examination, pretest probability of UTI is 8%.
Patient D: Female patient in ED, 2–6 years old, no fever but GU symptoms, pretest probability of UTI is 6.5%.
Patient E: Female patient in ED, adolescent age range, no fever but urinary symptoms, pretest probability of UTI is 9%
Management
- Know your local resistance patterns and make sure to send a urine culture
- Do not use nitrofurantoin in children (need bloodstream penetration)
<1mo
- Admit for IV antibiotics
- Ceftazidime 150mg/kg/d divided every 6 h
1mo - 2yo
- Ceftriaxone 50mg/kg in ED
- Cephalexin 50-100mg/kg/d in 4 divided doses x14d
- Maximum dose (all ages) 4g/24hr
>2yo
- Amoxicillin
- Mild to moderate infections (>40kg): 500mg PO BID for x10-14d
- Cephalexin 50-100mg/kg/d in 4 divided doses x7d
- Cefaclor 50-100 mg/kg/d divided in 3 doses x5d
- Cefixime 8 mg/kg daily x 5d
>13yr adolescent
- Consider 3 day course of treatment
Disposition
Admit
- <1 month old
- Toxic
- Inability to tolerate POs
Discharge
- 1mo - 2yr, who are well-appearing and not vomiting
- 24-hour follow up
- >2 years old
- 48-hour follow up
See Also
References
- ↑ McDaniel CE et al. Association of Diagnostic Criteria With Urinary Tract Infection Prevalence in Bronchiolitis: A Systematic Review and Meta-analysis. JAMA Pediatr. 2019;173(3):269-277. doi:10.1001/jamapediatrics.2018.5091.
- ↑ Kim GA and Koo JW. Validity of bag urine culture for predicting urinary tract infections in febrile infants: a paired comparison of urine collection methods. Korean J Pediatr. 2015 May; 58(5): 183–189.