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Avian Influenza surveillance in human
As at July 1, 2005.
Bureau of Epidemiology, Department of Diseases Control, Ministry of Public Health
I. Avian Influenza in human situation 2005
Since January 1, 2005 to July 1, 2005, the Bureau of Epidemiology has received 619 cumulative reports, 64 provinces of influenza or pneumonia cases in Avian Influenza Surveillance Network from the Provincial Health Offices and Disease Prevention and Control Regional Offices. The resul601ts of preliminary investigation were summarized as follows:
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No new confirm case.
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New cases = 2, 2 provinces : One case each from Sukhothai and Mae Hongson.
- Excluded cases, either the findings did not comply with the definitions or laboratory result revealed other causes : 619 cases.
II. Avian Influenza in human situation 2004
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Confirmed cases by laboratory detection of Influenza A (H5N1).
Total = 17; recovered = 5 and deaths = 12
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Probable case, because the signs complied with the definitions or died or respiratory failure or preliminary laboratory result.
revealed influenza group A infection = 1; death = 1
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Suspected cases, which the signs complied with the definitions.
Total = 22; recovered = 13 and deaths = 9
III. Avian Influenza International Situation, www.who.int
· World Health Organization had reported H5N1 confirmed cases since 26 December 2004, to 28 June 2005 = 108, with 54 deaths in 3 countries; Vietnam = 87, with 38 deaths; Four confirmed dead cases from Cambodia; and 17 cases with 12 deaths in Thailand. (Table 1)
IV. Domestic Avian Influenza in poultry situation
Avian influenza in poultry situation on the Department of Livestock Development web site (www.dld.go.th) since May 4 to July 1, 2005, 06:00 p.m.; revealed no infected areas and the areas where 21 days of surveillance are not completed. The areas waiting for laboratory result = 5 provinces; 15 tambons.
Table 1 : Details of confirmed H5N1 cases.
|
Duration |
Vietnam |
Cambodia |
Thailand |
TOTAL |
|
|
Case |
Dead |
Case |
Dead |
Case |
Dead |
Case |
Dead |
|
26 December - 10 March 2004 |
23 |
16 |
0 |
0 |
12 |
8 |
35 |
24 |
|
19 July - 8 October 2004 |
4 |
4 |
0 |
0 |
5 |
4 |
9 |
8 |
|
16 December 2004 - 28 June 2005 |
60 |
18 |
4 |
4 |
0 |
0 |
64 |
22 |
|
Summary |
87 |
38 |
4 |
4 |
17 |
12 |
108 |
54 |
*Patient definition:
- Suspected : Individual who has body temperature >38°C and one of these symptoms; muscle pain, cough, breathing difficulty, or shortness of breath, or the physician suspicious of pneumonia or influenza plus history of direct contacting sick or dead poultry within the last 7 days or unusual dead of poultry in the village within the last 14 days,
- Probable : suspected case with preliminary laboratory result of influenza A infection but strain not known either human or avian influenza yet or respiratory failure or dead,
- Confirmed : suspected case with final laboratory result indicated influenza A (H5) of which is avian strain by PCR or by virus culture,
- Excluded : any patient who is not compatible with the aforementioned definition or laboratory result proved to be other causes.
- Being under investigation : any patient, whose additional data or information either clinical or contact history in risk area are needed before any conclusion could be made.
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