CNS Infections Flashcards Preview

Hugh's MD1 Neuro > CNS Infections > Flashcards

Flashcards in CNS Infections Deck (18):
1

Which antibiotic is chosen for meningitis?

3rd generation cephalosporin as it covers the three most common bacterial causes

2

What are the normal values for CSF?

Gin clear

>60% glucose of blood

0 RBC

2

What is the problem with relying on CSF?

Infections may not present with differing protein, glucose, identifible pathogens. 

3

How do the symptoms of meningitis differ in baby/children cf to adults?

They are less specific and harder to elicit.

Include: bulging of the fontanelle

Crying

Cessation of feeding

Vomiting

Fever

3

What are some contraindications for lumbar puncture?

Shock

Raised ICP

Extensive or spreading purpura

3

How can you differentiate meningitis and encephalitis?

Encephalitis often presents with more obvious neurological signs

4

What age group has the highest incidence of meningitis? Which has the highest mortality?

Children

Elderly

6

Which meningococcal serogroup in most important in the developed world?

B and C

6

What is the most common cause of encephalitis?

Viral particularly HSV which can be treated

8

Which is more common and which is more dangerous, viral or bacterial meningitis?

Viral is more common while bacterial is more dangerous

11

T/F Culture negative CSF doesn't exclude a bacterial cause

True

12

What are the three most common bacterial causes of meningitis?

H. influenzae 

N. meningitidis

S. pneumoniae

 

13

What must occur with CSF samples for correct results to be attained?

Analysed quickly otherwise WBCs will begin to lyse

14

When are steroid used for meningitis?

In adults

Unsure of the benefit in children

15

What investigations can be made of meningitis?

CSF - most important

Blood

Neuroimaging

Skin scrapping

 

16

T/F It is possible to distinguish whether someone has bacterial or viral meningitis from initial CSF analysis

False

17

What are the symptoms of meningitis in adults?

Fever

Vomiting

Headache

Photophobia

Stiff neck

Altered conscious state

Seizures

18

What do the three most common bacterial causes of meningitis have in common that makes them so pathogenic?

They are all encapsulated