Why does protein increase in bacterial meningitis?
During bacterial infection, the protein level in the CSF goes up, due to the increased numbers of replicating bacteria and body cells fighting the infection, with both of them having a high concentration of protein. High levels of lactate in CSF indicate a higher likelihood of bacterial meningitis.
What causes elevated CSF protein?
An abnormal protein level in the CSF suggests a problem in the central nervous system. Increased protein level may be a sign of a tumor, bleeding, nerve inflammation, or injury. A blockage in the flow of spinal fluid can cause the rapid buildup of protein in the lower spinal area.
Is protein elevated in bacterial meningitis?
The CSF protein level (reference range, 20-50 mg/dL) is usually elevated in bacterial meningitis. In viral meningitis, these levels are also usually elevated, though they can be within the reference range.
Why is CSF glucose low in bacterial meningitis?
The reason for the reduced glucose levels associated with bacterial meningitis was believed to be the need for glucose as fuel by infiltrating immune cells in response to infection. However, the possibility that the bacteria itself could manipulate glucose concentrations in the brain had not been explored before now.
What does CSF look like in bacterial meningitis?
Lumbar puncture (LP) cerebrospinal fluid (CSF) findings in bacterial meningitis include the following: Appearance: Clear, cloudy, or purulent. Opening pressure: Elevated (>25 cm H2 O) WBC count: >100 cells/µL (>90% PMN); partially treated cases may have as low as 1 WBC/µL.
What is considered high protein in CSF?
EVALUATION. Spinal fluid protein concentration is usually moderately elevated, with concentrations in the 150 to 300 mg/100 mL range.
What findings of the CNS of the CSF would indicate bacterial meningitis?
Typical CSF abnormalities associated with bacterial meningitis include the following: Turbidity. Increased opening pressure (>180 mm water)Pleocytosis (usually of polymorphonuclear (PMN) leukocytes); WBC counts > 10 cells/mm.
Why is glucose high in meningitis?
Hyperglycemia can be explained by a physical stress reaction, the central nervous system insult leading to disturbed blood-glucose regulation mechanisms, and preponderance of diabetics for pneumococcal meningitis. Patients with diabetes and bacterial meningitis are at high risk for unfavorable outcome.
What does low protein in CSF mean?
Low levels of protein in your CSF could mean your body is leaking cerebrospinal fluid. This could be due to a traumatic injury such as head or spine trauma.
Which CSF results are most consistent with bacterial meningitis?
The CSF protein level (reference range, 20-50 mg/dL) is usually elevated in bacterial meningitis. In viral meningitis, these levels are also usually elevated, though they can be within the reference range.
What indicates bacterial meningitis?
Acute bacterial meningitis is rapidly progressive bacterial infection of the meninges and subarachnoid space. Findings typically include headache, fever, and nuchal rigidity. Diagnosis is by cerebrospinal fluid (CSF) analysis. Treatment is with antibiotics and corticosteroids given as soon as possible.
Is CSF clear or cloudy with bacterial meningitis?
In the presence of bacterial meningitis:
CSF is cloudy (purulent) CSF glucose is decreased in half the cases. WBCs are increased. WBCs are primarily PMNs.
What does bacteria in spinal fluid mean?
Bacteria or other germs found in the sample may be a sign of meningitis. This is an infection of the membranes covering the brain and spinal cord. The infection can be caused by bacteria, fungi, or viruses.
Is meningitis caused by Gram positive bacteria?
Primary meningitis in children is caused by two gram-negative bacterial species, Neisseria meningitidis and Haemophilus influenzae, and one gram-positive bacterial species Streptococcus pneumoniae.
Which characteristic of CSF indicates viral meningitis versus bacterial meningitis?
The clues that the doctor uses are the levels of white cells, protein and glucose in the CSF. Typically in bacterial meningitis the white cell count is much higher than in viral meningitis (and is a different type of white cell), the protein is much higher and the glucose is much lower than in viral meningitis.
How does bacterial meningitis affect the brain?
Meningitis is an infection of the membranes (meninges) that protect the spinal cord and brain. When the membranes become infected, they swell and press on the spinal cord or brain. This can cause life-threatening problems. Meningitis symptoms strike suddenly and worsen quickly.
What is the difference between viral meningitis and bacterial meningitis?
While there are similarities between the two – such as common initial symptoms and the population demographics most at risk of infection – bacterial meningitis is often more severe, and can be life-threatening if not treated. In contrast, patients with viral meningitis often recover on their own within 7 to 10 days.
How does bacterial meningitis related to the anatomy of the brain?
Meningitis is inflammation of the layers of tissue that cover the brain and spinal cord (meninges) and of the fluid-filled space between the meninges (subarachnoid space). Meningitis can be caused by bacteria, viruses, or fungi, by disorders that are not infections, or by drugs.