HSV Flashcards
Genital herpes in pregnancy presents risk of transmission to baby and neonatal infection, associated with high morbidity and mortality. Does not cause spontaneous miscarriage
How can it present in neonate?
Localised to skin/ eye/ mouth - best prognosis with minimal morbidity
CNS disease - encephalitis
Disseminated infection - multiple organ involvement
Timing of infection during pregnancy is crucial.
Why is this?
Risk greatest in women who acquire infection within 6 weeks of delivery, as viral shedding may persist, and no time for antibody response to be transmitted to foetus
Early pregnancy means lesions can heal before delivery, reducing risk transmission
Recurrent herpes has lower risk of neonatal HSV infection, but lesions at time of delivery can cause infection
How to manage patient presenting before 28 weeks gestation with primary genital herpes?
Swab for viral PCR to confirm
Aciclovir 400mg TDS for 5 days - reduces severity of symptoms, and viral shedding. IV if disseminated HSV
Aciclovir from week 36 until delivery
As long as no delivery within 6 weeks, can have vaginal delivery.
Refer to iCASH/ obstetric team
How to manage patient presenting after 28 weeks gestation with primary genital herpes? (not in labour)
Swab for viral PCR to confirm
Aciclovir 400mg TDS until delivery.
IV aciclovir 5mg/kg TDS - if disseminated HSV
C-section should be recommended
Check HSV IgG serology on booking bloods - helps confirm whether acute or recurrent infection. 15% of women presenting with first episode, may in fact be reactivation
Refer to iCASH/ obstetric team
What is management of pregnant women with recurrent genital herpes? (not in labour)
Prior to 36 weeks, offer analgesia/ saline baths
From 36 weeks until delivery - aciclovir 400mg TDS
Can have normal vaginal delivery
What is management of women with primary/ recurrent genital herpes, at onset of labour?
Risk of transmission to neonate estimated 41% if primary and 3% for recurrent
Swab for viral PCR to confirm. Even if result back late, will inform management of neonate
Consider HSV serology IgG, as will inform management of neonate
Aciclovir 5mg/kg TDS IV intrapartum
Consider aciclovir 20mg/kg TDS for neonate
C-section should be recommended if primary
Offer vaginal delivery if recurrent, but can opt for C-section
Management of neonate
What is management neonate born by C-section, if mother had primary HSV infection in third trimester?
No lesions at delivery
Low risk
Normal management of neonate including baby check
Inform parents to watch for skin/ eye lesions, or poor feeding
Management of neonate
What is management neonate born by SVD, if mother had primary HSV infection in previous 6 weeks
High risk
Swab - skin, conjunctiva, oropharynx
Lumbar puncture if unwell. Do not perform if well
Empirical treatment - IV aciclovir 20mg/kg TDS
Can breastfeed - unless lesions around nipples. Can transfer immunoglobulin
Management of neonate
What is management neonate if mother has recurrent HSV, but no lesions at delivery.
Low risk - maternal IgG will offer some protection
Normal management of neonate including baby check
Inform parents to watch for skin/ eye lesions, or poor feeding
How to manage HIV positive patient
Primary HSV pregnancy
Recurrent HSV pregnancy
Primary - same as other patients
Recurrent - aciclovir 400mg TDS from 32 weeks (as opposed to 36 weeks). Mode of delivery mostly depends on HIV status
Genital herpes (not pregnant) confirmed on swab, or high clinical suspicion
What is the management primary infection?
treatment should commence within 5 days of the start of the episode, or while new lesions are forming for people with a first clinical episode (not crusted over)
if crusted over - already healing, so do not offer therapy
- oral aciclovir 400 mg three times a day for 5–10 days
- refer to GUM clinic for further STI assessment (also refer partner)
- clean affected area with saline
- topical lidocaine
- avoid sex until lesions fully healed
Patients with genital HSV are likely to have up to 5 episodes of recurrence in first year. Some can be asymptomatic.
Transmission can occur whilst asymptomatic.
What information do we want to know about attacks?
Symptoms -
- lesions still forming
- prodromal - tingling/ burning
- episode severity in last year symptoms usually milder, and less lesions on subsequent episodes
- episode frequency in last year
- episode duration (the initial episode can last for up to 20 days, while recurrent attacks usually last 5–10 days)
- how often had treatment
- examination — lesions are usually unilateral (initial episodes are bilateral) and localized to the same area in each attack.
Recurrent genital/ orofacial HSV occurs as virus genome remains in latent state indefinitely
What is treatment approach recurrent HSV?
- Only try if self-care measures not working
<6 episodes per year -
- Rescue pack - aciclovir 400mg TDS for 5 days. Start once experience prodromal symptoms/ new lesions
> 6 episodes per year -
- long term aciclovir 400mg BD
- avoid sex whilst new lesions
- use condoms with new/ uninfected partner
Prophylaxis is the same for orofacial and genital HSV infection
What are long term effects of genital HSV?
No long term effects
Can affect pregnancy if recurs at time of delivery
Genital HSV
Who should be referred?
Everyone to iCASH - require full STI assessment
Urgent referral -
Pregnant
Immunocompromised - if no response to treatment
Complications -
- herpetic proctitis.
- severe local secondary infection.
- urinary retention due to pain
- meningitis/ encephalitis
