Monday, January 19, 2009 12:07 PM
picornaviridae 
-The largest virus family found on earth
-it is a naked virus
-Very infectious due to (+) RNA as genome information (it can be directly use as an mRNA for translation and replicate)
(e.g. rhino virus)
• Why It cause infection throughout the year:
àVirus is abundant in nasal discharge
àInfected people go to crowded area
àPeople sneeze without using tissue worse the hand contact to other people
Rhino virus only infect upper respiratory tract
No vaccination
-our body can produce immune (IgG) toward it but is it only last for a few years
-impossible to create vaccine due to:
àFirstly, there is no vaccination
àSecondly, there are over 100 types of rhino virus
àLastly, our body can produce immune toward it (free), therefore, not worthy to create (if there is vaccine toward it)
• Symptom
-Running nose
-sore throat
• Lab diagnosis
- Virus culture
- PCR (polymerase chain reaction)
- Nasal washings
Control
• Avoid people that have cold
• Sneeze into tissue
• If you are infected, stay at home
Done by: Pow Ze Liang