09 February, 2011

Japanese encephalitis

Japanese encephalitis
i) agent: Japanese encephalitis virus( RNA virus).
ii) transmission: the bite of an infected mosquito, primarily Culex species. 
mosquito; carrier of Japanese encephalitis virus(Culex tritaeniorhynchus)
---------- Department of Medical Entomology, NIID, Japan

iii) Disease: a few than 1% of human develop the encephalitis. Most peoples
------ are symptom-free.  Case–fatality ratio is around 20%–30%. 
------ Among survivors, 30%–50% may have significant neurological sequelae.

iv) Incidence of Japanese encephalitis:
----- In Japan, fewer than 10 patients/ year.
----- This virus is the most common cause of encephalitis in Asia, 
----- occurring throughout most of Asia and parts of the western Pacific. 
----- The virus has not been locally transmitted in Africa, Europe, or USA.

------ Centers for Disease Control and Prevention -------

v) prevention:  If you work or travel rural area during summer or rainy seasons,
----------- where mosquito bites are there ,
-----------Japanese encephalitis vaccine( 3 times; 0, 1~4 weeks, 1 year) should
----------- be administered.
Inactivated Vero Cell Culture-Derived JE Vaccine

Any questions;  
       Keiji Hagiwara, MD   keijihagiwara@gmail.com