Abstract
BACKGROUND:
Subdural effusions occur in (10 - 33 %) of children with acute bacterial meningitis. Usually occur
bilateral over frontoparietal region, although localized collections can develop over occipital
region. Effusions are most common when meningitis results from H.influenzae .(45% of all
effusions).
OBJECTIVE:
To find out the incidence , age distribution and type of bacteria involved in occurrence of subdural
effusion in bacterial meningitis, to know the risk factors that might associated with subdural
effusion .
PATIENTS AND METHODS:
from march 2010 – feb.2011 a Prospective study was done on 50 patients diagnosed and treated as
meningitis, information's obtained from patients include (patient name, date of birth, sex,
residency, duration of illness before admission, clinical presentation, and if antibiotics used prior
to admission. Diagnostic inclusion criteria clinical and laboratory based. daily follow up of them
.Brain CT was done to all of patients with meningitis after 7 days of treatment to roll out subdural
effusion because some of the patients were asymptomatic.
RESULTS:
The study shows that incidence of subdural effusion in bacterial meningitis was (22.0%).It is most
commonly occur in children below the age of (1) year, there was no significant difference between
male and female . Regarding CSF analysis, there were no specific findings that indicate presence
of subdural effusion. The majority of the patients show no growth of bacteria on CSF culture,
blood culture and gram stain, the others show equal growth of (streptococcus pneumonia,
H.influenzae and N.meningitidis). Regarding outcome the majority of the patients discharged well,
only one patient had focal deficit and one patient died.
CONCLUSION:
There were no significant risk factors associated with development of subdural effusion. The
majority of patients was discharged without any intervention and required follow up only. It's
important for physician to maintain a high index of suspicion for diagnosis of subdural effusion .It
is important to follow-up patients with meningitis by imaging study, because majority of patients
with subdural effusion are asymptomatic.
Subdural effusions occur in (10 - 33 %) of children with acute bacterial meningitis. Usually occur
bilateral over frontoparietal region, although localized collections can develop over occipital
region. Effusions are most common when meningitis results from H.influenzae .(45% of all
effusions).
OBJECTIVE:
To find out the incidence , age distribution and type of bacteria involved in occurrence of subdural
effusion in bacterial meningitis, to know the risk factors that might associated with subdural
effusion .
PATIENTS AND METHODS:
from march 2010 – feb.2011 a Prospective study was done on 50 patients diagnosed and treated as
meningitis, information's obtained from patients include (patient name, date of birth, sex,
residency, duration of illness before admission, clinical presentation, and if antibiotics used prior
to admission. Diagnostic inclusion criteria clinical and laboratory based. daily follow up of them
.Brain CT was done to all of patients with meningitis after 7 days of treatment to roll out subdural
effusion because some of the patients were asymptomatic.
RESULTS:
The study shows that incidence of subdural effusion in bacterial meningitis was (22.0%).It is most
commonly occur in children below the age of (1) year, there was no significant difference between
male and female . Regarding CSF analysis, there were no specific findings that indicate presence
of subdural effusion. The majority of the patients show no growth of bacteria on CSF culture,
blood culture and gram stain, the others show equal growth of (streptococcus pneumonia,
H.influenzae and N.meningitidis). Regarding outcome the majority of the patients discharged well,
only one patient had focal deficit and one patient died.
CONCLUSION:
There were no significant risk factors associated with development of subdural effusion. The
majority of patients was discharged without any intervention and required follow up only. It's
important for physician to maintain a high index of suspicion for diagnosis of subdural effusion .It
is important to follow-up patients with meningitis by imaging study, because majority of patients
with subdural effusion are asymptomatic.
Keywords
bacterial meningitis
subdural effusion