Bacterial Meningitis: Symptoms in Children – Infectious Diseases | Lecturio

Bacterial Meningitis: Symptoms in Children – Infectious Diseases | Lecturio


So, let’s look at the clinical
features of bacterial meningitis. Newborns are a challenge for physicians because they do not have the classic findings that are talked about in meningitis. For example, newborns don’t have generally a stiff neck. They may have fever, but they may have no fever or they may have a low temperature, so they have temperature instability. Newborns with meningitis are generally listless. They are not responsive to their surrounding. They may have an unusual
kind of high-pitched cry, which suggests a process
going on in the brain. They, as expected, would be fretful, they’re lethargic, they may not feed well, they may not feed at all, and the mothers may notice that
they have a very weak suck. So, they’re generally irritable. And, of course, all newborns are jaundiced, but newborns with meningitis
may have unusually severe jaundice. They may vomit, they may have diarrhea and respiratory distress. So, a pediatrician evaluating a newborn has to worry about meningitis in a baby with these kind of findings, any of them. And there’s an indication to do a spinal tap and examine the cerebrospinal fluid if there’s any suggestion of meningitis. Children from age one to four are
a little easier to evaluate. More than 90% of them
are going to have fever. Eighty-plus percent will be vomiting. And stiff neck starts to present
itself after about the year of one. So, those are the main findings
in children one to four. Older children and adults are easier to diagnose. Virtually 100% will have fever. Most of them have headache. Almost all of them will have meningismus, which is the syndrome of having a stiff neck. And this is an important point. Patients with viral meningitis, they may complain of headache, they may have fever, they may even have a stiff neck, but they’re not out of it. Most patients with bacterial meningitis on the other hand have cerebral dysfunction. When they are brought to a physician, and they are usually brought to the physician, they have confusion, their head doesn’t work. And the classic findings are the
findings of Kernig’s and Brudzinski sign. Now, Kernig’s sign, it’s often hard to remember. It was for me when I was a student. But the way I remember it now is K for kerning, K for doing something with the knee. So, the patient is supine and you take the patient’s leg and flex the leg like that and then extend the knee. Now, in a patient who’s awake, extending the knee puts traction on the meninges and that causes pain
going up and down the spine. That would be a positive Kernig’s sign. Now, in a comatose patient, they can’t tell you
whether they have pain, but doing this maneuver
and feeling resistance when you try to extend the knee is a positive Kernig’s sign
in a comatose patient. Brudzinski’s sign is where you
have the patient lying supine and you flex the patient’s neck. And if the patient’s hips involuntarily flex, they have a positive Brudzinski sign. Cranial nerve palsies are not as frequent. They occur in a minority of
patients with bacterial meningitis, but they are an ominous sign because it usually means that there is involvement of the brainstem. In every patient with meningitis, they need to be searched carefully, their extremities, legs, arms for a petechial rash because a petechial rash occurs primarily
in meningococcal meningitis, the meningitis due to Neisseria meningitidis. But it can occur also in
other forms of meningitis, particularly pneumococcal meningitis in the presence of a splenectomy. Seizures are, obviously, a bad sign and indicate that the meningitis
is pretty far advanced as is hemiparesis.

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