The diagnostic value of absolute neutrophil count, band count and morphologic changes of neutrophils in predicting bacterial infections.
OBJECTIVE
To evaluate the value of neutrophil left shift parameters and neutrophil morphologic changes in diagnosing acute bacterial infections.


METHODS
Peripheral blood samples were obtained from 105 patients who had a positive culture for bacteria. Automated complete white blood cell count was performed as well as peripheral blood smear preparation. Absolute neutrophil count (ANC) and neutrophil band count were determined and the neutrophils were evaluated for morphologic changes, namely toxic granulation, vacuolation and Dohle bodies.


RESULTS
Band count was less sensitive than ANC and white blood cell count in predicting bacterial infections except in the elderly and infant population. Toxic granulation in neutrophils appeared to be as sensitive as ANC in predicting bacterial infection.


CONCLUSIONS
ANC and toxic granulation appear to be more sensitive than band count in predicting bacterial infections. However, band count has a greater sensitivity in infants and elderly patients.
Al-Gwaiz
Layla A
LA
Hematology Section, Department of Pathology, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, Kingdom of Saudi Arabia. lgwaiz@yahoo.com
Babay
Hanan H
HH
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001424:Bacterial Infections / Q000097:blood* / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007958:Leukocyte Count; D008297:Male; D008875:Middle Aged; D009504:Neutrophils / Q000473:pathology*; D012680:Sensitivity and Specificity