Thrombocytosis at an early stage of respiratory tract viral infection.
OBJECTIVE
To determine whether thrombocytosis, a platelet count of more than 500 x 10(9)/l, occurs at an early stage of respiratory tract viral infection.


METHODS
The medical records of 345 patients with respiratory syncytial virus (RSV), influenza, measles, adenovirus or human herpes virus 6 infections were retrospectively reviewed.


RESULTS
The mean platelet count was significantly higher in RSV patients than in patients with other respiratory infections. Among the 29 patients with thrombocytosis, 24 (82.8%) had RSV infection.


CONCLUSIONS
When thrombocytosis is positive at an early stage of respiratory tract infection, RSV should be taken into account as a causative agent.
Kubota
Masaru
M
Department of Paediatrics, Kobe City General Hospital, Kobe, Japan. mkubota@kcgh.gr.jp
Maeda
Haruko
H
Yoshimoto
Jun
J
Kobayashi
Kenichiro
K
Usami
Ikuya
I
Yamaoka
Koji
K
D006801:Humans; D010976:Platelet Count; D018357:Respiratory Syncytial Virus Infections / Q000175:diagnosis; D012141:Respiratory Tract Infections / Q000150:complications* / Q000175:diagnosis*; D012189:Retrospective Studies; D013922:Thrombocytosis / Q000209:etiology*; D014777:Virus Diseases / Q000150:complications* / Q000175:diagnosis*