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which is mc cause of bacterial meningitis? - irida
#1
which is the most common cause of bacterial meningitis in adults: N. meningitidis or S. pneumoniae?
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#2
FA say N. meningitidis, but UW S.pneumoniae. Which one is right?
Please...
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#3
Neisseria Meningitidis is MC in adults than Strep to my knowledge.. this is what i have been sticking with for quite some time now, and have been correctly answer q's. Elderly patients (60+ ull see more Strep). Cheers.
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#4
agree with armani i guess that NM is more frequent in young adults ( peak 3-18yo) and strep is more frequent in elederly patients ( peak 50yo and/or immunocompromised...)

hope this helps...G.L/.

good article from http://www.emedicine.com/med/topic2613.htm
Raymund R Razonable, MD, Consultant, Division of Infectious Diseases, Mayo Clinic of Rochester; Assistant Professor of Medicine, Mayo Clinic College of Medicine ( Last Updated: Aug 28, 2007)

Changing Epidemiology of Acute Bacterial Meningitis in the United States*


Bacteria
1978-1981 1986 1995

H influenzae 48% 45% 7%

Listeria 2% 3% 8%

NM 20% 14% 25%

S.AGALACT 3% 6% 12%

STREP.P 13% 18% 47%



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#5
s pn.: it is the most common bacterial cause of meningitis, accounting for 47% of cases. It is also associated with one of the highest mortality rates among the bacterial agents that cause meningitis (19-26%).
18-50 years means adult yes?
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#6

Risk and/or Predisposing Factor Bacterial Pathogen
Age 0-4 weeks S agalactiae (group B streptococci)
E coli K1
L monocytogenes

Age 4-12 weeks S agalactiae
E coli
H influenzae
S pneumoniae
N meningitidis

Age 3 months to 18 years N meningitidis
S pneumoniae
H influenzae

Age 18-50 years S pneumoniae
N meningitidis
H influenzae

Age older than 50 years S pneumoniae
N meningitidis
L monocytogenes
Aerobic gram-negative bacilli

Immunocompromised state
S pneumoniae
N meningitidis
L monocytogenes
Aerobic gram-negative bacilli

Intracranial manipulation, including neurosurgery
Staphylococcus aureus
Coagulase-negative staphylococci
Aerobic gram-negative bacilli, including
Pseudomonas aeruginosa

Basilar skull fracture
S pneumoniae
H influenzae
Group A streptococci
CSF shunts Coagulase-negative staphylococci
S aureus
Aerobic gram-negative bacilli
Propionibacterium acnes

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