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Sentinel Surveillance of Infectious Diseases at Child Care Centres/Kindergartens(CCC/KG)
Weekly Update
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The Centre for Health Protection (CHP) of the Department of Health has established several surveillance systems in Hong Kong to monitor communicable disease activity at the community and public and private healthcare facilities. With the participation of different partners, CHP will have a more comprehensive picture of the situation of communicable diseases. The sentinel surveillance system based at CCC/KG is one of the surveillance systems.
This weekly update outlines the data provided by CCC/KG participating in the "Sentinel Surveillance of Infectious Diseases at Child Care Centres/Kindergartens". This update aims at informing the public of community-wide trends of infectious disease based on inference from the collected data, and does not represent the situation at any particular CCC/KG or geographic area.
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I. Weekly Overview |
| Week 26 (26/6 – 30/6) |
| Recent data reported by sentinel CCC/KGs showed that the activities of hand, foot and mouth disease and fever have increased while the activities of cough, diarrhoea and vomiting were at baseline level. |
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| Year 2017 |
Week 26 |
Week 25 |
Week 24 |
Week 23 |
| Surveillance period |
26/6 - 30/6 |
19/6 - 23/6 |
12/6 - 16/6 |
5/6 - 9/6 |
| Number of children (CCC/KG) under survelliance |
21506(101) |
24162(108) |
22928(96) |
22509(106) |
| a) Surveillance of Symptoms |
| Percentage of CCC/KG with children affected by fever |
77.23 |
58.33 |
67.71 |
60.38 |
| Percentage of CCC/KG with children affected by cough |
50.50 |
48.15 |
56.25 |
50.94 |
| Percentage of CCC/KG with children affected by diarrhoea |
5.94 |
10.19 |
7.29 |
13.21 |
| Percentage of CCC/KG with children affected by vomiting |
11.88 |
7.41 |
13.54 |
8.49 |
| b) Surveillance of Hand, Foot and Mouth Disease |
| Percentage of CCC/KG with HFMD cases |
10.89 |
7.41 |
11.46 |
6.60 |
| c) Surveillance of Absenteeism due to Sickness |
| Average rate of absenteeism due to sickness |
2.86 |
2.63 |
1.55 |
2.57 |
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II) Surveillance of symptoms |
1) Fever |
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2) Cough |
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3) Diarrhoea |
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4) Vomiting |
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III) Surveillance of Hand, Foot and Mouth Disease |
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IV) Surveillance of Absenteeism due to Sickness |
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Methodology
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1. |
On each operating day, sentinel CCC/KG record the number of absentees due to sickness. (Data is not collected on days when a CCC/KG is closed due to public holiday, bad weather or other reasons.) The total number of absentees due to sickness among all sentinel CCC/KG is divided against the total number of children in attendance to get the gross daily rate of absenteeism. The rates for each day of the week are then averaged to get the week's "Average rate of absenteeism due to sickness." |
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2. |
On each week, sentinel CCC/KG record the presence of cases of Hand, Foot and Mouth Disease (HFMD). CHP calculates the total number of CCC/KG with cases of HFMD, and based on the total number of CCC/KG submitting reports, works out the "Percentage of CCC/KG with cases of HFMD." |
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3. |
Every Wednesday, sentinel CCC/KG record the number of absentees who are showing symptoms of fever, cough, diarrhoea and vomiting. The numbers are reported to CHP at the end of the week. (Data is collected on the next operating day when a CCC/KG is closed due to public holiday, bad weather or other reasons.) Based on the submitted data, CHP works out the "Percentage of CCC/KG with children affected by symptom" for the week. |
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