Starting from 2003, there are
a total of 38 locations selected for the vector
surveillance. Two different indices, namely Area
Ovitrap Index (AOI), and Monthly Ovitrap Index (MOI),
would be enumerated. AOI indicates the extensiveness
of the distribution of Aedine mosquitoes in that
particular area surveyed while the MOI is the average
of all AOIs within the same month, which reflects
the territory-wide situation of Aedes albopictus.
The Ovitrap Index can be classified
into 4 categories :
Classification
Ovitrap
Index
Level 1
O.I. < 5%
Level 2
5% £
O.I. < 20%
Level 3
20% £
O.I. < 40%
Level 4
O.I. ³
40%
A higher level of index
indicates a more extensive distribution of Aedes
albopictus and specific preventive and control
measures will be initiated accordingly.
The following graph shows the comparison
of Monthly Ovitrap Index between 2008 and average
of 2000 to 2007.
Please click
here for graphical information on the ovitrap indices of the
year from 2003 to 2007.
Please click
here for monthly data on the ovitrap indices of the
year from 2003 to 2007.
Please click
here for port monthly data on the ovitrap indices of the
year from 2004 to 2007.
The Monthly
Ovitrap Index for
August 2008 is 11.7%.
The Port
Monthly Ovitrap Index forAugust 2008 is0.6%.
Area Ovitrap Index for
all the 38 locations are shown in the following
maps :
Please 
Last revision date: 11-09-2008