QuestionSBA
QuestionChoice
Although streptococcus pneumoniae is one of the most common causes of bacterial meningitis, this patient is suffering from viral meningitis. CSF analysis of bacterial meningitis is characterised by:

* Cloudy or turbid appearance
* Low glucose
* Elevated WCC, predominantly polymorphs
* Elevated protein
* Elevated opening pressure
10000368
c
Streptococcus pneumoniae
QuestionChoice
Although this young patient is indeed suffering from a case of viral meningitis, enteroviruses are the most common cause of viral meningitis and are therefore the most likely causative organism.
10000367
b
Herpes simplex virus
QuestionChoice
Cryptococcus neoformans is the most common cause of fungal meningitis. Fungal meningitis is an unlikely presentation in individuals with no history of immunosuppression and usually presents with systemic involvement. Furthermore, the CSF analysis does not support a diagnosis of fungal meningitis, which is characterised by:

* Cloudy appearance
* Low glucose
* Elevated, predominantly lymphocytes
* Elevated protein
* Elevated opening pressure
10000370
e
Cryptococcus neoformans
QuestionChoice
Another organism commonly implicated in meningitis, this bacteria is unlikely to be the cause due to the results of the CSF analysis which indicate viral meningitis.
10000369
d
Neisseria meningitidis
QuestionChoice
This young patient is suffering from viral meningitis. Enteroviruses are the most common cause of viral meningitis. CSF analysis of viral meningitis is characterised by:

* Clear appearance
* Normal glucose
* Elevated WCC, predominantly lymphocytes
* Normal or raised protein
* Normal or elevated opening pressure
10000366
a
Enterovirus
Concept
Chapter
2693
3751
Meningitis
Topic
141
Neurology
12620
An 11-year-old male presents to the emergency department with a 6-hour history of gradual-onset severe headache and fever. On examination, you identify nuchal rigidity. You suspect meningitis and perform a lumbar puncture to obtain a CSF sample.


||||
|---------------------------------|:-------:|-------------------------|
|Opening Pressure|normal|50 - 180|
|Total Protein|0.54 g/L|0.15 - 0.45|
|Glucose|3.4 mmol/L|3.2 - 4.4|
|Lymphocyte Count|546/ µL|<5/               µL|
|Plasma Glucose|4.9 mmol/L|3.5 - 5.5|


 * CSF Appearance: Clear


Which of the following is the most likely causative organism?
a