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Research ArticlePractice

Herpes zoster during pregnancy

Anna Pupco, Pina Bozzo and Gideon Koren
Canadian Family Physician October 2011, 57 (10) 1133;
Anna Pupco
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Pina Bozzo
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Gideon Koren
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Abstract

Question One of my pregnant patients, a 32-year-old woman (gravida 2, para 1), has a flare up of herpes zoster (HZ) at the T11 to T12 dermatomes. This virus, the varicella-zoster virus, causes chickenpox, which can be teratogenic. Is this also true for HZ?

Answer Herpes zoster, unlike chickenpox, is not associated with increased fetal risk. In contrast, a nonimmune woman exposed to HZ by contact might contract chickenpox.

Following a primary infection with the varicella-zoster virus (VZV), the virus can remain latent in the dorsal root ganglia and might cause herpes zoster (HZ) upon reactivation. Herpes zoster infection typically exhibits vesicular rash, pain, and itching in the dermatome distribution. Patients might suffer from postherpetic neuralgia for months after the rash subsides.

Herpes zoster is contagious only while the patient has lesions and until the lesions crust. Covering the lesions decreases transmission. Susceptible (nonimmunized) individuals might contract primary varicella infection (chickenpox) by direct contact with the zoster lesion.1,2

A prospective study reported on 474 women diagnosed with HZ during pregnancy.3 The 474 women had 466 live births, 5 miscarriages, and 3 therapeutic abortions. There were 2 children with malformations, but no cases of congenital varicella syndrome (CVS) among the live births and no serologic evidence of intrauterine infection. A smaller prospective report had 14 cases complicated with HZ with no adverse outcomes or CVS.4

There is a theoretical risk of intrauterine infection following HZ involving the T10 to L1 dermatomes (as sensory nerves to the uterus originate from these segments) during pregnancy. However, no such reports have been documented.5 There was a case of congenital malformations consistent with CVS (limb hypoplasia and skin scarring) in a child whose mother had disseminated zoster at 12 weeks of gestation, highlighting the possibility of infection caused by maternal viremia.6

There is no clinical or serologic evidence of VZV infection in infants whose mothers developed perinatal zoster. Newborns do not appear to be at risk of infection if maternal zoster occurs near delivery.7

If a susceptible pregnant woman (in any stage of pregnancy) is exposed to VZV, passive antibody prophylaxis with immunoglobulin preparation containing VZV immunoglobulin G is indicated within 96 hours of exposure.2

Herpes zoster infection during pregnancy is not associated with increased risk of congenital malformations above the general population baseline risk or of CVS. Individuals with HZ should cover lesions in order to reduce the risk of transmitting VZV to susceptible pregnant women.

Notes

MOTHERISK

Motherisk questions are prepared by the Motherisk Team at the Hospital for Sick Children in Toronto, Ont. Dr Pupco is a member, Ms Bozzo is Assistant Director, and Dr Koren is Director of the Motherisk Program. Dr Koren is supported by the Research Leadership for Better Pharmacotherapy during Pregnancy and Lactation. He holds the Ivey Chair in Molecular Toxicology in the Department of Medicine at the University of Western Ontario in London.

Do you have questions about the effects of drugs, chemicals, radiation, or infections in women who are pregnant or breastfeeding? We invite you to submit them to the Motherisk Program by fax at 416 813–7562; they will be addressed in future Motherisk Updates. Published Motherisk Updates are available on the Canadian Family Physician website (www.cfp.ca) and also on the Motherisk website (www.motherisk.org).

  • Copyright© the College of Family Physicians of Canada

References

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    1. Bolyard EA,
    2. Tablan OC,
    3. Williams WW,
    4. Pearson ML,
    5. Shapiro CN,
    6. Deitchman SD,
    7. et al
    . Guideline for infection control in healthcare personnel, 1998. Atlanta, GA: Centers for Disease Control and Prevention; 1998. Available from: www.cdc.gov/ncidod/dhqp/pdf/guidelines/InfectControl98.pdf. Accessed 2011 Aug 22.
  2. ↵
    1. Cohen A,
    2. Moschopoulos P,
    3. Stiehm RE,
    4. Koren G
    . Congenital varicella syndrome: the evidence for secondary prevention with varicella-zoster immune globulin. CMAJ 2011;183(2):204-8. Epub 2011 Jan 24. Erratum in: CMAJ 2011;183(3):349.
    OpenUrlFREE Full Text
  3. ↵
    1. Arvin AM,
    2. Gershon AA
    1. Enders G,
    2. Miller E
    . Varicella and herpes zoster in pregnancy and the newborn. In: Arvin AM, Gershon AA, editors. Varicella-zoster virus. Virology and clinical management. Cambridge, UK: Cambridge University Press; 2000. p. 317-47.
  4. ↵
    1. Paryani SG,
    2. Arvin AM
    . Intrauterine infection with varicella-zoster virus after maternal varicella. N Engl J Med 1986;314(24):1542-6.
    OpenUrlPubMed
  5. ↵
    1. Dworkin RH,
    2. Johnson RW,
    3. Breuer J,
    4. Gnann JW,
    5. Levin MJ,
    6. Backonja M,
    7. et al
    . Recommendations for the management of herpes zoster. Clin Infect Dis 2007;44(Suppl 1):S1-26.
    OpenUrlAbstract/FREE Full Text
  6. ↵
    1. Higa K,
    2. Dan K,
    3. Manabe H
    . Varicella-zoster virus infections during pregnancy: hypothesis concerning the mechanisms of congenital malformations. Obstet Gynecol 1987;69(2):214-22.
    OpenUrlPubMed
  7. ↵
    1. Miller E,
    2. Cradock-Watson JE,
    3. Ridehalgh MK
    . Outcome in newborn babies given anti-varicella-zoster immunoglobulin after perinatal maternal infection with varicellazoster virus. Lancet 1989;2(8659):371-3.
    OpenUrlPubMed
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Canadian Family Physician: 57 (10)
Canadian Family Physician
Vol. 57, Issue 10
1 Oct 2011
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Herpes zoster during pregnancy
Anna Pupco, Pina Bozzo, Gideon Koren
Canadian Family Physician Oct 2011, 57 (10) 1133;

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Anna Pupco, Pina Bozzo, Gideon Koren
Canadian Family Physician Oct 2011, 57 (10) 1133;
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