Neonatal Herpes in Indian Babies: Signs, Causes and Treatment

The three forms of neonatal herpes

Doctors classify neonatal HSV into three overlapping patterns, which guide how intensively it is treated:

• Skin, eye and mouth (SEM) disease — roughly 45% of cases. The infection is limited to grouped blisters on the skin, a red discharging eye, or small mouth ulcers. With prompt IV acyclovir, outcomes are very good and most babies develop normally. Untreated, about 70% progress to the more dangerous forms — which is why even mild-looking SEM disease is treated urgently.
• Disseminated disease — roughly 25% of cases. Multiple organs are involved (liver, lungs, adrenal glands, blood clotting, sometimes the brain). The baby looks severely unwell, much like newborn sepsis — poor feeding, lethargy, breathing trouble, jaundice or abnormal bleeding. Skin blisters may or may not be present.
• Central nervous system (CNS) disease — roughly 30% of cases. This is herpes encephalitis, usually appearing in the second to third week of life with seizures, lethargy, poor feeding and temperature instability. Survivors can have lasting effects on development.

Why so many cases come as a surprise

About 70% of mothers of babies with neonatal HSV had no idea they carried genital herpes. Many genital infections are mild or silent, and the virus can be passed even with no visible sore. This is why prevention is not only about mothers with a known diagnosis — protecting newborns from anyone's cold sore matters just as much.

What this means in India

Indian studies put HSV-2 seroprevalence at roughly 5–15% of adults depending on the population, somewhat lower than many Western settings but far from negligible. HSV-1 is very common (70–90% in many groups). Reliable figures for neonatal HSV in India are limited, and the condition is believed to sit at the lower end of the global range — but awareness among obstetricians and paediatricians has grown with FOGSI, IAP and NNF guidance. If you have a herpes history, raising it early with your obstetrician is the most useful thing you can do.

Telling HSV blisters from harmless newborn rashes

Most newborn skin findings are benign, and it helps to know the common look-alikes — though when in doubt, a paediatrician should decide:

• Erythema toxicum — blotchy red patches with small yellow pustules, very common, clears within the first week.
• Milia — tiny white bumps on the face that are completely harmless (more in our guide to milia in newborns).
• Transient neonatal pustular melanosis — small pustules that fade to dark spots, common in babies with deeper skin tones.
• Heat rash (prickly heat) — common in India's climate; see heat rash in babies.
• Oral thrush — white patches in the mouth that don't wipe off easily, unlike milk; see baby oral thrush.

How it is diagnosed

Testing both confirms HSV and maps how far it has spread:

• HSV PCR swabs from the eyes, nose/throat, mouth, rectum and any skin blisters — the standard test, usually back in 24–48 hours.
• Blood HSV PCR to look for virus in the bloodstream (a sign of disseminated disease).
• Lumbar puncture for cerebrospinal fluid HSV PCR — important even without obvious brain symptoms, because CNS involvement can be quiet early on.
• Brain MRI (preferred over CT) and an EEG if CNS disease is a concern.
• Blood tests — full blood count, liver function and clotting studies — plus an eye examination by an ophthalmologist and a chest X-ray if breathing is affected.

How it is treated

The cornerstone is high-dose intravenous acyclovir, 60 mg/kg/day in three divided doses, given in a NICU. The course is 14 days for SEM disease and 21 days for disseminated or CNS disease. Generic acyclovir injection is inexpensive in India (about ₹100–500 a vial), though the NICU stay itself is the larger cost.

During treatment the team monitors kidney function (acyclovir needs good hydration), blood counts and liver function. Supportive care is matched to severity — from careful eye care in SEM disease, to breathing and circulatory support, clotting correction and seizure control in severe cases.

Breastfeeding is encouraged throughout unless the mother has a herpes lesion on the breast itself; HSV does not pass through breast milk. After the IV course, six months of oral suppressive acyclovir is recommended to cut recurrences and protect brain development, especially after CNS disease. Babies who had CNS or disseminated disease then have long-term developmental, hearing and vision follow-up.

Will it happen again in the next pregnancy?

Reassuringly, the risk in a later pregnancy is lower, not higher. By then the mother carries protective antibodies that pass to the baby, and her HSV status is known so the pregnancy can be managed proactively — suppressive antivirals from 36 weeks, assessment at labour, and a caesarean if active lesions are present. Many women who had an affected baby go on to have unaffected babies with this planning. Counselling with your obstetrician and paediatrician helps you prepare.

How common is neonatal herpes?

It is rare. Estimates vary by setting, and reliable Indian data is limited, but India is thought to sit at the lower end of the global range. Most babies — even those born to mothers with genital herpes — are not affected, especially with appropriate antenatal care and simple precautions after birth.

Can I breastfeed if I have herpes?

Yes. HSV does not pass through breast milk, so breastfeeding is encouraged — unless there is an active herpes lesion on the breast itself. In that case, feed or express from the unaffected breast while the lesion heals, and wash your hands carefully before every feed. A lactation consultant or paediatrician can guide you.

I have genital herpes — does that mean I need a caesarean?

Not necessarily. If you have no active lesions or warning symptoms at labour, a vaginal birth is usually appropriate even with a herpes history. A caesarean is recommended mainly when active genital lesions or prodromal symptoms are present at the time of labour. Suppressive acyclovir from 36 weeks lowers the chance of an outbreak at delivery.

Can a cold sore really harm my newborn?

Yes, which is why no one with an active cold sore should kiss a newborn. A cold sore that is trivial for an adult can cause serious infection in a baby. Cover the sore, wash hands before any contact, and wait until it has fully healed before close facial contact.

What is the treatment, and does it work?

Treatment is high-dose intravenous acyclovir in a NICU — 14 days for skin/eye/mouth disease and 21 days for disseminated or brain disease — usually followed by six months of oral suppressive acyclovir. Started early, it works well: skin/eye/mouth disease has excellent outcomes, and even severe forms have far better outcomes than before this treatment existed.

When do symptoms usually appear?

Skin/eye/mouth and disseminated disease usually appear in the first one to two weeks of life, and brain (CNS) disease typically in the second to third week. Late onset up to four to six weeks is possible, so stay alert to new symptoms throughout the early weeks.