About Neonatal (Newborn) Herpes

Overview

Neonatal herpes refers to a rare but serious condition where a newborn baby becomes infected with the herpes simplex virus (HSV) during childbirth. This infection can occur when the mother has genital herpes, either as a new infection acquired during pregnancy or as a preexisting infection. Neonatal herpes can have severe complications for the baby, including brain inflammation, developmental disabilities, blindness, and even death. The risk of transmission is highest if the mother acquires genital herpes for the first time during the third trimester of pregnancy. To reduce the risk of transmission, doctors may recommend antiviral medication for the mother during pregnancy or opt for a cesarean delivery. Prompt medical attention and appropriate management are crucial in preventing and treating neonatal herpes.

Causes and Risk Factors

The disease causes of neonatal herpes include:

• Transmission during childbirth: When a mother has an active genital herpes outbreak at the time of delivery, the virus can be transmitted to the baby through contact with the infected birth canal.
• In utero transmission: Although rare, HSV can also be transmitted from a pregnant woman to her fetus in utero, leading to neonatal herpes.

Risk factors of neonatal herpes include:

• Maternal first-time infection: If a mother contracts HSV for the first time during late pregnancy, the risk of transmitting the virus to the baby increases.
• Unsafe sex practices: Practicing safe sex and using barrier methods like condoms can reduce the risk of HSV transmission.

Risks of transmission to HSV to neonates can be decreased with:

• Antiviral medication: Taking antiviral medication during pregnancy can help reduce the risk of transmitting HSV to the baby.
• Cesarean (C-section) delivery: In cases where a mother has an active genital herpes outbreak or a history of recurrent outbreaks near the time of delivery, a cesarean delivery may be recommended to reduce the risk of transmission.

It's important to note that these risk factors can vary depending on individual circumstances, so it's best to consult with a healthcare professional for personalized advice.

Symptoms

Symptoms of neonatal herpes include:

• Early symptoms:
• Skin rash or blisters: These may appear on the face, body, or genitals of the newborn.
• Fever: The baby may have a high temperature.
• Poor feeding or difficulty feeding: The baby may have trouble latching or show signs of discomfort during feeding.
• Lethargy: The baby may be unusually sleepy or difficult to wake.
• Higher severity symptoms:
• Encephalitis: Inflammation of the brain, which can cause seizures, irritability, poor muscle tone, and changes in behavior
• Respiratory problems: The baby may have difficulty breathing or develop pneumonia.
• Disseminated infection: The virus can spread throughout the body, leading to organ dysfunction, jaundice, bleeding, and shock.

It's important to note that symptoms can vary from case to case, and some infants may not show any symptoms initially. If you suspect neonatal herpes, seek immediate medical attention for proper diagnosis and treatment.

Diagnosis

To diagnose neonatal herpes, the following examinations, tests, and procedures are commonly performed:

• Physical exam: The healthcare provider will look for symptoms such as skin blisters, sores, redness, or swelling. They will also check for fever, poor feeding, breathing problems, or signs of irritability, which may indicate the infection has spread.
• Lab tests:
  • PCR (polymerase chain reaction) testing: This is the main test used for diagnosing. It detects virus’s genetic material (DNA) in blood, spinal fluid, or swabs from skin lesions.
• Further lab tests:
  • Liver function tests: Detects liver damage, which can occur in systemic neonatal herpes
  • Complete blood count (CBC): Checks for anemia, low platelets, or signs of systemic inflammation
  • Other blood tests: Assesses kidney function or detect co-infections, depending on symptoms
• Imaging studies: These may include
  • CT (computed tomography) scans or MRI (magnetic resonance imaging) scans: Used in severe cases, especially with central nervous system involvement to check for brain swelling or damage
  • Ultrasound: May be used to evaluate organ involvement, such as the liver or spleen
• Consultation with specialists: Referral to a pediatric neurologist and pediatric infectious disease specialist may be required to help manage the infection and its treatment.

It is important to follow up with your healthcare provider if any symptoms worsen or change after the initial examination. They will guide you through the necessary steps for a proper diagnosis.

Treatment Options

The goals of treatment for neonatal herpes are to lower the chances of serious illness and death caused by the infection.

Antiviral drugs are the main treatment. These drugs help inhibit the replication of the herpes simplex virus. They can reduce the frequency, severity, and duration of outbreaks. They are available for oral or intravenous use. Intravenous (IV) acyclovir: For infants with known or suspected neonatal herpes, intravenous acyclovir is recommended. The dosage and duration depend on how widespread the infection is—whether it is limited to the skin and mucous membranes, has spread throughout the body (disseminated), or involves the central nervous system.

It's important to note that all treatment options should be discussed with a healthcare professional.

Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Side effects can occur. Check with your health care professional or read the information provided with your medication for side effect information.