microbiology

3. Figure 1.Map of chikungunya fever epidemics occurring during the period
2004–2008. On the basis of molecular analysis of outbreak strains and the
epidemiology of the outbreaks of Chikungunya virus, Chikungunya virus
was believed to re-emerge from Kenya starting in 2004. From there, the
disease spread eastward throughout the islands in the Indian Ocean before
becoming established in India. From India, the disease spread further, as far
away as Italy. The base map was obtained from ArcGIS software (ESRI).

4. Figure 1: Worldwide
distribution of
chikungunya virus in
2010. Both green and
orange indicate
countries where cases
of chikungunya fever
have been
documented, and
orange indicates
countries where
chikungunya virus
has been endemic or
epidemic.
Microbiol. 2010 Jul;8(7):491

5.  Only the female Aedes bites(blood meal)
 Transmission cycle:
Man
 Becomes infective after ten days of bite &
remains life long infective.
Mosquito

6.  Africa
 Sylvatic transmission cycle
 Outbreaks usually associated with
heavy rainful and increased mosquito
population
 Asia
 Mosquito to man
Burt FJ et al. Lancet 2012; 379:662-71
www.cdc.gov

7. As of January 6, 2014
www.cdc.gov

8. Comparison of the Clinical Features of Chikungunya
Fever and Dengue Fever.