Neonatal meningitis

How does this happen?

The brain and spinal cord float in spinal fluid, wrapped in layers called the meninges. Meningitis means bacteria have got into that fluid.

In newborns, bacteria usually reach it through the bloodstream. That is why meningitis and sepsis so often occur together, and why the organisms are the same: Group B strep and E. coli most commonly. ²

Spinal fluid is a poor place for the body to fight infection. There are fewer immune cells there and antibiotics cross into it less easily than into blood. That is why treatment is longer and why the choice and dose of antibiotic differs from bloodstream infection alone. ¹

The damage comes from the inflammation as much as from the bacteria. Swelling raises pressure, blood vessels can clot, and the fluid pathways can scar and block, which is how hydrocephalus develops after meningitis. ³

The hearing nerves run close to the infected fluid, which is why hearing loss is one of the most common lasting consequences and why a hearing assessment after meningitis is not optional. ⁴

What causes it?

Two different questions get mixed together here. The first is what leads to this injury in the body. The second is whether anyone could have prevented it. They are not the same question, and the answer to the first does not settle the second.

Happens even with perfect care

• Group B strep that reached the baby despite correct prevention, including with a negative screen or a very fast labor. ²
• E. coli and other organisms not covered by GBS screening.
• Listeria, acquired during pregnancy.
• Preterm birth, which raises risk. ⁶
• Late-onset infection in a baby who needed prolonged hospital care and central lines.
• Viral causes, including herpes simplex, which can be acquired around birth without any recognized maternal illness.

Associated with gaps in care

These are situations where published standards say what the care team should watch for and do. A gap here does not prove anyone caused your child's injury. It points to where the medical records will have an answer.

• A lumbar puncture not done in a newborn being evaluated or treated for possible infection, so meningitis was neither confirmed nor excluded. This is the central issue on this page. ¹
• Antibiotics started without a plan to check the spinal fluid, with a partially treated meningitis then missed.
• Treatment length based on a blood culture alone, so the course was too short for meningitis.
• GBS screening or antibiotics in labor not given where guidance indicated them. ²
• chorioamnionitis not recognized or treated. ⁷
• Signs of newborn infection not acted on, where the standard is to evaluate and treat promptly. ²
• Hearing not assessed after meningitis, which is standard follow-up. ⁴
• Head circumference not tracked afterward, so developing hydrocephalus was missed. ³

Whether any of this amounts to a departure from the standard of care takes a physician expert reading the whole record.

What are the signs, by age?

Signs change as a child grows. A newborn cannot show you a walking problem. Some children look fine at first and show differences months later.

At birth and the first hours

• Non-specific signs of being unwell: poor tone, poor color, temperature instability, needing help at birth. ⁸
• Nothing that distinguishes meningitis from sepsis at this stage.

The first week

• Poor feeding and sleepiness.
• Temperature that is low or high.
• Irritability, particularly a baby who is more distressed when handled.
• A high-pitched cry.
• A bulging or full soft spot.
• Seizures, which are more common in meningitis than in bloodstream infection alone. ⁹
• Apnea.

Around 3 months

• Head growing faster than expected, suggesting hydrocephalus. ³
• Poor visual attention or hearing responses.
• Seizures.
• Developmental delay in babies who were severely affected.

Around 6 months

• Delay in rolling. ¹⁰
• Hearing loss becoming apparent. ¹¹
• Continued rapid head growth.

Around 12 months

• Delay in sitting or standing. ¹⁰
• Established hearing loss.
• Shunt problems in children who needed one.

Toddler years

• cerebral palsy in children with brain injury.
• Speech delay, often driven by hearing loss.
• Epilepsy in some children. ¹²

School age

• Learning differences.
• Hearing needs.
• Ongoing shunt monitoring where one is in place. ³

How is it diagnosed?

lumbar puncture is the test. A small amount of spinal fluid is taken from the lower back and examined for cells, protein, glucose and bacteria, and cultured. ¹

It is often deferred in a baby who is too unstable, which is appropriate, but it should then be done once the baby can tolerate it rather than dropped.

Blood cultures, which can be negative in a baby who has meningitis. This is the point that families should understand, because a negative blood culture is sometimes reported as reassuring. ¹

Imaging. cranial ultrasound at the bedside to look for ventricle enlargement, and MRI to look for brain injury, abscess, or clots in the veins. ¹

EEG where seizures are suspected. ⁹

Repeat lumbar puncture in some cases, to confirm the fluid is clearing, particularly with certain organisms.

Testing for herpes simplex where the picture fits, since treatment is different and time-critical.

Ask directly: was a lumbar puncture done, what did it show, and if it was not done, why not.

What is the treatment?

Antibiotics through a vein, chosen to reach the spinal fluid in adequate concentration, started promptly and adjusted once the organism is known. ²

Longer courses than for bloodstream infection alone. The duration depends on the organism, and Gram-negative organisms such as E. coli need longer than Group B strep. ¹

Antiviral treatment if herpes simplex is suspected, started while testing is underway.

Seizure treatment, guided by EEG. ⁹

Managing pressure and fluid. Head circumference is followed closely and repeat imaging is done, because hydrocephalus after meningitis is common and may need a shunt. ³

Supportive intensive care where needed.

Follow-up that must include hearing. A full audiology assessment after meningitis is standard, not optional. ^{4 11}

Developmental follow-up. ¹³ Referral to early intervention is free to evaluate for a child under 3. ¹⁴

What is the long-term outlook?

Outcomes vary widely and depend on the organism, how quickly treatment started, and whether complications developed.

Many babies treated promptly recover well. ²

The recognized lasting effects are hearing loss, hydrocephalus, epilepsy, cerebral palsy and learning differences. ^{3 12}

Hearing loss is the most common and the most treatable, provided it is looked for. That is the strongest argument for keeping the audiology appointment even in a child who seems entirely well. ⁴

Ask what the MRI showed, whether the ventricles are enlarging, and what the hearing assessment showed. Those three answers cover most of what determines the picture.

What does daily life look like?

In hospital: a long antibiotic course, often several weeks, sometimes completed at home with a long line.

Afterward: hearing follow-up, developmental follow-up, head circumference checks, and for families with a shunt, learning the blockage warning signs. ³

Families frequently describe lasting fear after newborn meningitis. That is understandable and it is worth naming. See the parent's own health guide. ¹⁵

What does care cost over a lifetime?

No agency publishes a lifetime cost estimate for neonatal meningitis.

Where hearing loss follows, CDC estimated about $417,000 per person in 2003 dollars. Where cerebral palsy follows, the estimate was about $921,000 in 2003 dollars. These are separate population estimates that overlap and cannot be added together for one child. ¹⁶

See the cost of care estimator.

What can you do this week?

1. Ask whether a lumbar puncture was done, and if not, why not and whether it will be.
2. Ask what the spinal fluid showed and what organism grew.
3. Ask how long the antibiotic course is and what determines that.
4. Ask whether head circumference is being tracked and whether the ventricles are being watched.
5. Book a full audiology assessment, and keep it.
6. Ask what the MRI showed.
7. Refer to early intervention.

What should you ask each specialist?

Take these with you. Write the answers down in the moment, because you will not remember them later.

For the neonatologist

• Was a lumbar puncture done, and what did the spinal fluid show?
• What organism, and how long is the antibiotic course?
• Will the lumbar puncture be repeated?
• Are the ventricles enlarging?
• What did the MRI show?

For the audiologist

• What kind of hearing testing is being done?
• When should we retest, given that hearing loss after meningitis can be progressive?
• What should we watch for at home?

For the neurologist or neurosurgeon

• Is hydrocephalus developing, and what number are you watching?
• Is there a seizure risk, and what would a seizure look like?
• What follow-up do you want, and for how long?

You can also build a printable list with the question generator.