Neonatal HSV: Difference between revisions

(Text replacement - "Category:Peds" to "Category:Pediatrics")
No edit summary
(31 intermediate revisions by 4 users not shown)
Line 1: Line 1:
==Background==
==Background==
*Causative agent: [[HSV-1]] or [[HSV-2]]
*Causative agent: [[HSV-1]] or [[HSV-2]]
*Risk greatest under 3 weeks of age. Greatest risk factors is primary maternal HSV at delivery.
*Definition – “infection acquired peri-natally or postnatally without clinical manifestations at birth or in the first 24 hours of life but with subsequent clinical manifestations in the neonatal period (age less than 29 days)” <ref name="definition">Caviness AC. Neonatal herpes simplex virus infection. Clin Ped Emerg Med. 2013;14(2):135-145</ref>
*ED prevalence:
**0.2% all neonates
**0.3% febrile neonates
**0.5% neonates undergoing LP
*Prevalence similar to meningitis (0.4%) in neonates presenting for SBI workup <ref name="prevalence">Caviness AC, et al. The prevelance of neonatal herpes simplex virus compared with serious bacterial illness in hospitalized neonates. J Pediatr. 2008;153:164-169</ref>
*Risk associated with age <3 weeks, primary maternal HSV infection at delivery  


Conjunctival disease may be manifestation of SEM disease.
===Classification===
*Whitney-Kimberlin disease categories
**Disseminated (liver, lung, adrenal glands, skin, eye, brain) - 25%
***2/3 have CNS involvement
**CNS - 30%
**SEM (skin, eye, mouth) - 45%
***Conjunctival disease or minor skin lesions may be only manifestation
****May go on to CNS, disseminated disease - workup and treat the same


===Risk Factors in Neonatal Fever===
===Historical Features===
{{Pediatric fever acyclovir indications}}
*Not sensitive (maternal history of HSV), nor specific (maternal fever, vaginal delivery, preterm birth) <ref name="definition"></ref>
**80% of mothers have no history of genital lesions <ref name="details">James SH, Kimberlin DW. Neonatal herpes simplex virus infection: epidemiology and treatment. Clin Perinatol. 2015;42(1):47-59</ref>
*[[vesiculobullous rashes|Vesicular lesions]] most specific, present in <1/2 <ref name="definition></ref>
**Note: absence of vesicular rash does not rule out
*'''May be well appearing''' - maintain high clinical suspicion
*Ask about:
**Temperature instability ([[fever (Peds)|fever]], [[hypothermia]])
**Irritability
**[[Altered mental status|Lethargy]]
**[[Seizure (peds)|Seizures]]
**[[Shortness of breath (peds)|Respiratory distress]]


==Clinical Features==
==Clinical Features==
*General
**Temperature instability ([[fever (Peds)|febrile]] or [[hypothermia|hypothermic]])
**May be well appearing in SEM
*Disseminated
**[[Neutropenia]]
**[[Thrombocytopenia]]
**[[Hepatitis]]
**[[Pneumonitis]]
**[[DIC]]
**+/- CNS disease
*CNS
**Hypotonia
**[[seizure (peds)|Seizures]]
**Abnormal brain imaging
**Abnormal EEG
**CSF pleocytosis and/or proteinosis
*SEM
**Characteristic [[neonatal rashes|skin lesions]] of HSV – skin, eye (kerato-conjunctivitis), or mouth
**No evidence of systemic or CNS infection


==Differential Diagnosis==
==Differential Diagnosis==
{{Pediatric fever DDX}}


==Diagnosis==
==Evaluation==
===Work-up===
*Should include the following <ref name="details"></ref>
**CBC with differential
**Chem
**[[LFTs]]
**Blood, urine culture
**[[LP]] with CSF studies
**Perform PCR/culture of:
***Any visible lesions
***Conjunctiva, nasopharynx, mouth, anus
****Even in the absence of lesions
**Consider [[CXR]] for respiratory symptoms
**Suspected CNS disease should get CT and EEG
**''Suspected ocular involvement should get optho consult''
 
===Evaluation===
*Always consider neonatal HSV and perform appropriate work-up and treatment if:
**Evidence of vesicular rash (even if minor)
**[[Keratoconjunctivitis]]
**[[Seizure]]
**Poor feeding
**[[altered mental status (peds)|Lethargy]]
**Irritability
**[[shortness of breath (peds)|Respiratory distress]]
**[[sepsis (peds)|Sepsis]]
**Temperature instability
**CSF pleocytosis
**[[Thrombocytopenia]]
**Transaminitis
**Working up for serious bacterial illness


==Management==
==Management==
===Management Considerations===
*[[Acyclovir]] if <ref>Caviness AC, et al. The prevalence of neonatal herpes simplex virus infection compared with serious bacterial illness in hospitalized neonates. J Pediatr. 2008;153(2):164</ref><ref>Long SS. In defense of empiric ayclovir therapy in certain neonates. J Pediatr. 2008;153(2):157</ref><ref>Kimberlin DW. When should you initiate acyclovir therapy in a neonate? J Pediatr. 2008;153(2):155</ref>
**Proven HSV disease
**Suspected HSV disease (see clinical features) pending studies
**At risk due to exposure (active genital lesions in mother)
*Many recommend acyclovir empirically in ill-appearing neonates with fever (including hypothermia) or aspetic meningitis until results of work-up are known
{{Neonatal HSV antivirals}}
{{Neonatal HSV antivirals}}


==Disposition==
==Disposition==
*Any neonate with suspected HSV (especially if CSF pleocytosis) should be treated and admitted
**Consider covering all febrile neonates regardless pending CSF and culture studies
===Outcomes===
*SEM with treatment - all survive <ref name="definition"></ref>
**If untreated 50-60% with SEM go on to CNS or disseminated disease
*Mortality high with CNS (4%) or disseminated (29%) disease even with treatment <ref name="details"></ref>


==See Also==
==See Also==

Revision as of 18:36, 6 October 2019

Background

  • Causative agent: HSV-1 or HSV-2
  • Definition – “infection acquired peri-natally or postnatally without clinical manifestations at birth or in the first 24 hours of life but with subsequent clinical manifestations in the neonatal period (age less than 29 days)” [1]
  • ED prevalence:
    • 0.2% all neonates
    • 0.3% febrile neonates
    • 0.5% neonates undergoing LP
  • Prevalence similar to meningitis (0.4%) in neonates presenting for SBI workup [2]
  • Risk associated with age <3 weeks, primary maternal HSV infection at delivery

Classification

  • Whitney-Kimberlin disease categories
    • Disseminated (liver, lung, adrenal glands, skin, eye, brain) - 25%
      • 2/3 have CNS involvement
    • CNS - 30%
    • SEM (skin, eye, mouth) - 45%
      • Conjunctival disease or minor skin lesions may be only manifestation
        • May go on to CNS, disseminated disease - workup and treat the same

Historical Features

  • Not sensitive (maternal history of HSV), nor specific (maternal fever, vaginal delivery, preterm birth) [1]
    • 80% of mothers have no history of genital lesions [3]
  • Vesicular lesions most specific, present in <1/2 [1]
    • Note: absence of vesicular rash does not rule out
  • May be well appearing - maintain high clinical suspicion
  • Ask about:

Clinical Features

Differential Diagnosis

Pediatric fever

Evaluation

Work-up

  • Should include the following [3]
    • CBC with differential
    • Chem
    • LFTs
    • Blood, urine culture
    • LP with CSF studies
    • Perform PCR/culture of:
      • Any visible lesions
      • Conjunctiva, nasopharynx, mouth, anus
        • Even in the absence of lesions
    • Consider CXR for respiratory symptoms
    • Suspected CNS disease should get CT and EEG
    • Suspected ocular involvement should get optho consult

Evaluation

Management

Management Considerations

  • Acyclovir if [4][5][6]
    • Proven HSV disease
    • Suspected HSV disease (see clinical features) pending studies
    • At risk due to exposure (active genital lesions in mother)
  • Many recommend acyclovir empirically in ill-appearing neonates with fever (including hypothermia) or aspetic meningitis until results of work-up are known

Disposition

  • Any neonate with suspected HSV (especially if CSF pleocytosis) should be treated and admitted
    • Consider covering all febrile neonates regardless pending CSF and culture studies

Outcomes

  • SEM with treatment - all survive [1]
    • If untreated 50-60% with SEM go on to CNS or disseminated disease
  • Mortality high with CNS (4%) or disseminated (29%) disease even with treatment [3]

See Also

External Links

References

  1. 1.0 1.1 1.2 1.3 Caviness AC. Neonatal herpes simplex virus infection. Clin Ped Emerg Med. 2013;14(2):135-145
  2. Caviness AC, et al. The prevelance of neonatal herpes simplex virus compared with serious bacterial illness in hospitalized neonates. J Pediatr. 2008;153:164-169
  3. 3.0 3.1 3.2 James SH, Kimberlin DW. Neonatal herpes simplex virus infection: epidemiology and treatment. Clin Perinatol. 2015;42(1):47-59
  4. Caviness AC, et al. The prevalence of neonatal herpes simplex virus infection compared with serious bacterial illness in hospitalized neonates. J Pediatr. 2008;153(2):164
  5. Long SS. In defense of empiric ayclovir therapy in certain neonates. J Pediatr. 2008;153(2):157
  6. Kimberlin DW. When should you initiate acyclovir therapy in a neonate? J Pediatr. 2008;153(2):155