Blood stained cerebrospinal fluid responsible for false positive reactions of latex particle agglutination tests.
The accuracy of the latex particle agglutination test (LPAT) was assessed in blood stained cerebrospinal fluid (CSF) specimens from 166 paediatric patients, aged from three months to 13 years. A commercial LPAT kit was used to detect Haemophilus influenzae type b, Streptococcus pneumoniae, and Neisseria meningitidis A, B, and C soluble antigens. Culture of CSF specimens was used as the standard and all laboratory procedures were performed blind. The mean CSF erythrocyte count was 66,406 cells/mm3 in the cases and 11,560 cells/mm3 in the controls. The sensitivity and the specificity of LPAT were 83.8 and 94.0%, respectively, suggesting that LPAT is a useful diagnostic tool even in blood stained CSF specimens.
Camargos
P A
PA
Department of Pediatrics, School of Medicine, University of Minas Gerais, Brasil.
Almeida
M S
MS
Filho
G L
GL
Batista
K W
KW
Carvalho
A G
AG
Pereira
C L
CL
D000293:Adolescent; D000942:Antigens, Bacterial / Q000134:cerebrospinal fluid*; D002648:Child; D002675:Child, Preschool; D004906:Erythrocyte Count; D005069:Evaluation Studies as Topic; D005189:False Positive Reactions; D005260:Female; D006193:Haemophilus influenzae / Q000276:immunology; D006801:Humans; D007223:Infant; D007841:Latex Fixation Tests; D008297:Male; D016920:Meningitis, Bacterial / Q000134:cerebrospinal fluid* / Q000276:immunology; D009345:Neisseria meningitidis / Q000276:immunology; D011237:Predictive Value of Tests; D011933:Reagent Kits, Diagnostic; D012680:Sensitivity and Specificity; D013296:Streptococcus pneumoniae / Q000276:immunology
D000942:Antigens, Bacterial; D011933:Reagent Kits, Diagnostic