title: Lymphocyte-white blood cell count ratio: a quickly available screening tool to differentiate acute purulent tonsillitis from glandular fever.
abstract: OBJECTIVE
  To find a quickly available screening tool for the differentiation of patients with glandular fever from those with acute purulent tonsillitis. The null hypothesis was that there was no difference between the lymphocyte-white blood cell count (L/WCC) ratio between the 2 patient groups.
  
  
  METHODS
  Retrospective pilot study based on laboratory tests for lymphocyte counts, white blood cell counts, and the mononucleosis spot test.
  
  
  METHODS
  Ear, Nose, and Throat Department, St George's Hospital, London, England.
  
  
  METHODS
  One hundred twenty patients with glandular fever and 100 patients with bacterial tonsillitis.
  
  
  METHODS
  Results from the mononucleosis spot test in conjunction with the clinical picture and the L/WCC ratio were analyzed. Significant differences were evaluated using the Mann-Whitney test and Fisher exact test.
  
  
  RESULTS
  The L/WCC ratio was significantly different in the 2 groups (P<.001). The mean L/WCC ratio in the glandular fever group was 0.54 and the mean L/WCC ratio in the bacterial tonsillitis group was 0.10. A ratio higher than 0.35 had a specificity of 100% and a sensitivity of 90% for the detection of glandular fever.
  
  
  CONCLUSIONS
  We recommend that the L/WCC ratio should be used as an indicator to decide whether mononucleosis spot tests should be requested. A ratio higher than 0.35 had a high specificity in our study group.
authors.affiliation: Department of Otolaryngology, St George's Hospital, London, England. dennis.wolf@gmail.com
authors.forename: Dennis M
authors.initials: DM
authors.lastname: Wolf
authors.forename: Ilka
authors.initials: I
authors.lastname: Friedrichs
authors.forename: Abbad G
authors.initials: AG
authors.lastname: Toma
mesh_terms: D000208:Acute Disease; D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007244:Infectious Mononucleosis / Q000175:diagnosis*; D007958:Leukocyte Count; D018655:Lymphocyte Count; D008297:Male; D010865:Pilot Projects; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013492:Suppuration; D014069:Tonsillitis / Q000175:diagnosis*