Dengue surveillance data, Oct-Dec 2016
Number of cases reported
1.
1,084 dengue cases (including 1 dengue haemorrhagic fever (DHF) case) were
notified in the quarter from Oct to Dec 2016 (02/10/2016 - 31/12/2016), a decrease of
62.5% as compared to the previous quarter from Jul to Sep 2016 (03/07/2016 1/10/2016). In 2016 (03/01/2016-31/12/2016), a cumulative total of 13,115 dengue
cases were notified to MOH *.
Deaths
2.
During the quarter, 1 death from local dengue infection was reported. The case
was not residing in an active dengue cluster (Table 1). This brings the annual number
of deaths since Jan 2016 to 9.
Serotype distribution
3.
Preliminary results of the positive dengue samples serotyped in Oct to Dec
2016 indicate that DEN-1 accounted for majority of the typed samples, followed by
DEN-2, DEN-3 and DEN-4 (Figure 1)*.
Table 1. Dengue death cases (local infections) reported between Oct-Dec 2016
S/N
Age
Location of residence
Residing in
active dengue
cluster
1
47
Marsiling Rise
Yes
January
2
67
Toa Payoh Lorong 4
No
February
3
63
Bedok North Street 3
No
March
4
73
Poh Huat Road West
Yes
March
5
79
Jalan Tenaga
Yes
May
Month of
death
6
72
Simei Street 1
Yes
June
7
79
Eastwood Drive
Yes
Aug
8
11
Woodleigh Close
Yes
Aug
9
81
Mandai Estate
No
Nov
Figure 1. Dengue serotypes in 2016
Surveillance of dengue virus serotypes 2016
100%
90%
80%
Percentage
70%
60%
50%
40%
30%
20%
10%
0%
Jan-16 Feb-16 Mar-16 Apr-16 May-16 Jun-16 Jul-16 Aug-16 Sep-16 Oct-16 Nov-16 Dec-16
Months
(Source: EHI, TTSH NUH, KKH, CGH, KTPH, SGH )
DEN-1
DEN-2
DEN-3
DEN-4
*Preliminary figures, subject to revision when more information is available.
Clusters and breeding
4.
NEA notified 105 clusters in the 4th quarter of 2016 (Oct to Dec 2016); 96 were
closed as of 31 Dec 2016. In the previous quarter (Jul to Sep 2016), 290 clusters were
notified, and closed as of 31 Dec 2016.
5.
NEA detected and destroyed about 4,000 mosquito breeding in the quarter from
Oct to Dec 2016 (02/10/2016 - 31/12/2016), similar to the number of breeding detected
in the previous quarter from Jul to Sep 2016 (03/07/2016-01/10/2016). For 2016, about
17,000 mosquito breeding have been detected and destroyed. The breakdown of
breeding found at various premises types are found in Table 2. The largest proportion
of breeding is still being found in homes.
Table 2: No. of breeding detected from Jan to Dec 2016*
2016
Residential premises
About 7,800 (46%)
Public areas
About 4,900 (30%)
Construction sites
Others
Total
About 870 (5%)
About 3,200 (19%)
About 17,000
*Provisional; generated as of 9 Jan 2017.
6.
The top five breeding habitats found in homes are shown in Table 3. The top
five
breeding
habitats
per
year
can
be
found
at:
http://www.dengue.gov.sg/subject.asp?id=100.
Table 3: Top five breeding habitats between 3rd (Jul to Sep) quarter 2016 and
4th (Oct to Dec) quarter 2016*
3rd quarter (Jul to Sep 2016)
4th quarter (Oct to Dec 2016)
1
Domestic containers
Domestic containers
2
Flower pot plate / tray
Flower pot plate / tray
3
Ornamental containers
Ornamental containers
4
Plants (Hardened soil and plant axils)
Plants (Hardened soil and plant axils)
5
Toilet bowl and cistern
Toilet bowl and cistern