Glossary of CNS 2
Other Decks By This User
- What are the usual defense mechanisms of the CNS?
- -Blood brain barrier
-Its central anatomical location
- What 3 infections usually present with a CNS specimen?
- 1. Meningitis
2. Brain abcess
- What are the 2 most common causes of meningitis?
- 1. 2ndary infection disseminated from upper resp tract infection.
- What types of symptoms accompany meningitis?
- Severe headache
- What types of WBC counts are seen in bacterial versus viral meningitis?
- Bacterial: PMNs
- What CSF Glu and Protein levels are seen in bacterial versus viral meningitis?
- Bacterial: low glu, high protein
Viral: normal glu, slightly high protein.
- What do CSF direct smears and cultures produce for bacterial versus viral meningitis?
- Bacterial: positive
Viral: negative - can't grow on artificial media.
- What usually causes brain abcesses?
- 1. Infection somewhere else
2. Skull trauma
- What 3 types of infections often are causes of brain abcess?
- 1. Otitis media
3. Lung infection
- Is encephalitis usually bacterial or viral?
- What should CSF normally look like?
- Clear and straw colored. if cloudy, suspect infection.
- What is a CSF specimen ALWAYS?
- STAT - these are bad infections.
- What do you inoculate a CSF specimen to, and how do you incubate it?
- CA, BA, Thioglycollate.
-37'C, CO2 atmosphere.
- Should you do a direct smear for a CSF? Why?
- Yes - b/c plates take 24 hrs, and there's no normal flora in the CSF.
- What 2 STAT direct smears should be done for a CSF specimen?
- -Gram stain
-Capsule stain (for Cryptococcus neoformans)
- How is CSF processed before inoculating plate media?
- Centrifuged because bacteria are usually in low numbers. Then inoculate with the sediment.
- What are probable pathogens in Meningitis of newborns?
- -Beta strep grp B
- What are probable pathogens in Meningitis of kids under 5 yrs?
- H. influenzae type B
- What are probable pathogens in Meningitis of adults?
- Neisseria meningitidis
- What are 2 common pathogns in brain abcesses?
- What 3 parasites cause CNS infections?
- -Naegleria fowleri
- What yeasts cause CNS infections?
- Cryptococcus neoformans.
- What molds cause CNS infections?
- -Coccidiodes immitis
You must Login or Register to add cards