Biomaterial Database

Cerebrospinal fluid osmolal changes in bacterial meningitis. 1993

B S Singh, and A K Patwari, and M Deb

Department of Pediatric, Lady Harding Medical College, New Delhi.

Sixty children with acute bacterial meningitis (ABM) were prospectively studied for their serum sodium values and cerebrospinal fluid (CSF), serum and urinary osmolality. The results have been compared with 20 age and nutritionally matched controls. Even though mean serum osmolality (283.2 +/- 13.84 mOsm/kg) and serum sodium levels (130.5 +/- 8.15 mEq/L) were significantly lower in ABM in comparison to controls (p < 0.05 and < 0.001, respectively), the overall mean CSF osmolality in patients with ABM (282.5 +/- 12.3 mOsm/kg) was not significantly different as compared to controls (288.2 +/- 7.89 mOsm/kg). As expected, cases of ABM with syndrome of inappropriate secretion of antidiuretic hormone (SIADH) had significantly lower CSF osmolality (272 +/- 9.42 mOsm/kg) as compared to those without SIADH (288.5 +/- 9.34 mOsm/kg) and controls (288.2 +/- 7.89 mOsm/kg). However, our observations indicate that whereas the mean CSF osmolality was lower than the serum osmolality in the control group as well as in ABM without SIADH, it was greater than serum osmolality in ABM with SIADH (p < 0.05). Our results suggest that in the presence of SIADH, hypo-osmolality of serum may eventually result in hypo-osmolality of CSF, but the fall in CSF osmolality is not of the same degree as that of serum. Low CSF osmolality was observed to be associated with an unfavorable prognosis (p < 0.05).

UI	MeSH Term	Description	Entries
D007223	Infant	A child between 1 and 23 months of age.	Infants
D007231	Infant, Newborn	An infant during the first 28 days after birth.	Neonate,Newborns,Infants, Newborn,Neonates,Newborn,Newborn Infant,Newborn Infants
D007709	Klebsiella	A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria whose organisms arrange singly, in pairs, or short chains. This genus is commonly found in the intestinal tract and is an opportunistic pathogen that can give rise to bacteremia, pneumonia, urinary tract and several other types of human infection.
D008297	Male		Males
D009345	Neisseria meningitidis	A species of gram-negative, aerobic BACTERIA. It is a commensal and pathogen only of humans, and can be carried asymptomatically in the NASOPHARYNX. When found in cerebrospinal fluid it is the causative agent of cerebrospinal meningitis (MENINGITIS, MENINGOCOCCAL). It is also found in venereal discharges and blood. There are at least 13 serogroups based on antigenic differences in the capsular polysaccharides; the ones causing most meningitis infections being A, B, C, Y, and W-135. Each serogroup can be further classified by serotype, serosubtype, and immunotype.	Diplokokkus intracellularis meningitidis,Meningococcus,Micrococcus intracellularis,Micrococcus meningitidis,Micrococcus meningitidis cerebrospinalis,Neisseria weichselbaumii
D009994	Osmolar Concentration	The concentration of osmotically active particles in solution expressed in terms of osmoles of solute per liter of solution. Osmolality is expressed in terms of osmoles of solute per kilogram of solvent.	Ionic Strength,Osmolality,Osmolarity,Concentration, Osmolar,Concentrations, Osmolar,Ionic Strengths,Osmolalities,Osmolar Concentrations,Osmolarities,Strength, Ionic,Strengths, Ionic
D011446	Prospective Studies	Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.	Prospective Study,Studies, Prospective,Study, Prospective
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D002675	Child, Preschool	A child between the ages of 2 and 5.	Children, Preschool,Preschool Child,Preschool Children
D004926	Escherichia coli	A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.	Alkalescens-Dispar Group,Bacillus coli,Bacterium coli,Bacterium coli commune,Diffusely Adherent Escherichia coli,E coli,EAggEC,Enteroaggregative Escherichia coli,Enterococcus coli,Diffusely Adherent E. coli,Enteroaggregative E. coli,Enteroinvasive E. coli,Enteroinvasive Escherichia coli