What is the structure of bacterial meningitis?
N. meningitidis is a gram-negative β proteobacterium and member of the bacterial family of Neisseriaceae. N. meningitidis is a fastidious bacterium, dying within hours on inanimate surfaces, and is either an encapsulated or unencapsulated, aerobic diplococcus with a “kidney” or “coffee-bean” shape (Fig.
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What is the structure of bacterial meningitis?
N. meningitidis is a gram-negative β proteobacterium and member of the bacterial family of Neisseriaceae. N. meningitidis is a fastidious bacterium, dying within hours on inanimate surfaces, and is either an encapsulated or unencapsulated, aerobic diplococcus with a “kidney” or “coffee-bean” shape (Fig.
What does bacterial meningitis do to cells?
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.
Which cells are increased in bacterial meningitis?
What does cerebrospinal fluid (CSF) cell count indicate in meningitis?
| Agent | Opening Pressure (mm H2 O) | WBC count (cells/µL) |
|---|---|---|
| Bacterial meningitis | 200-300 | 100-5000; >80% PMNs |
| Viral meningitis | 90-200 | 10-300; lymphocytes |
| Tuberculous meningitis | 180-300 | 100-500; lymphocytes |
| Cryptococcal meningitis | 180-300 | 10-200; lymphocytes |
What types of cells cause meningitis?
Several strains of bacteria can cause acute bacterial meningitis, most commonly:
- Streptococcus pneumoniae (pneumococcus).
- Neisseria meningitidis (meningococcus).
- Haemophilus influenzae (haemophilus).
- Listeria monocytogenes (listeria).
What cellular components do some bacterial cells?
Cell wall
- The gram-positive cell wall.
- The gram-negative cell wall.
- Fimbriae and pili.
- S-layers.
- Glycocalyx.
- Flagella.
- The bacterial DNA and plasmids.
- Ribosomes and other multiprotein complexes.
How do I know if I have Neisseria spp?
Phenol red is used as the pH indicator in most rapid acid detection tests for Neisseria spp. Organisms which produce acid from carbohydrates will produce sufficient acid to exceed the buffering capacity of the substrate medium and cause a color change from red (alkaline) to yellow (acid).
Can bacterial meningitis cause brain damage?
Bacterial meningitis is serious. Some people with the infection die and death can occur in as little as a few hours. However, most people recover from bacterial meningitis. Those who do recover can have permanent disabilities, such as brain damage, hearing loss, and learning disabilities.
What is normal cell count in CSF?
Normally, there are no RBCs in the cerebrospinal fluid, and there should be no more than five WBCs per cubic millimeter of CSF. If your fluid contains RBCs, this may indicate bleeding. It is also possible that you had a traumatic tap (blood leaked into the fluid sample during collection).
Is white blood cell count high with meningitis?
On the other hand, when the CSF WBC count is 30/µL or less, the NPV is high (99.3%) and the posttest likelihood of bacterial meningitis is similar to that of children with a WBC count of 3/µL or less. Those with higher cell counts have likelihoods of bacterial meningitis that are significantly elevated.
What are 3 types of meningitis?
The three types of meningitis are viral meningitis, fungal meningitis, and bacterial meningitis. The meninges are membranes that cover the brain and spinal cord. Meningitis occurs when these membranes become inflamed, potentially causing serious complications for the nervous system.
