Thailand:Avian Influenza surveillance in human(As at September 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 September 1, 2005, the Bureau of Epidemiology has received 901 cumulative reports, 65 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:
-
No new confirm case.
-
New cases = 6; 4 provinces; Three cases from Maehongson, and each from Phitsanulok, Burirum and Songkla.
-
Case under investigation, either additional clinical information or past history of risk factors are needed = 5, 3 provinces; Three cases from Maehongson, and 1 each from Phitsanulok and Burirum. (Table 1)
-
Excluded cases, either the findings did not comply with the definitions or laboratory result revealed other causes : 896 cases.
II. Avian Influenza in human situation 2004
-
Confirmed cases by laboratory detection of Influenza A (H5N1).
Total = 17; recovered = 5 and deaths = 12
-
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
-
Suspected cases, which the signs complied with the definitions.
Total = 22; recovered = 13 and deaths = 9
III. Avian Influenza International Situation, www.who.int
?SPAN style="FONT: 7pt ´Times New Roman?>
World Health Organization had reported H5N1 confirmed cases since 26 December 2004, to 5 Aug 2005 = 112, with 57 deaths in 4 countries; Vietnam = 90, with 40 deaths; Four confirmed dead cases from Cambodia; 17 cases with 12 deaths in Thailand; and one confirm dead case from Indonesia. (Table 2)
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 July 1 to September 1, 2005; 2 provinces, 5 tambons, Kamphaengphet (4 tamboms), and Ayatthaya (1 tambon) were infected areas and the areas where 21 days of surveillance are not completed. The areas waiting for laboratory result = 17 provinces; 34 tambons.
Table 1 : Details of 5 cases under investigation.
|
No. |
Sex |
Age
(yrs.) |
Province |
Contact poultry |
Dead poultry |
Contact pneumonia patient |
Onset |
Diagnosis |
Laboratory result |
|
1 |
F |
51 |
Phitsanulok |
Yes |
No |
No |
Aug 29, 2005 |
LBP, UTI |
waiting |
|
2 |
F |
5 |
Burirum |
No |
Yes |
No |
Aug 30, 2005 |
Pneumonia |
waiting |
|
3 |
M |
36 |
Maehongson |
Yes |
Yes |
No |
Aug 31, 2005 |
URI |
waiting |
|
4 |
F |
26 |
Maehongson |
Yes |
Yes |
No |
Aug 31, 2005 |
URI |
waiting |
|
5 |
F |
2 m. |
Maehongson |
Yes |
Yes |
No |
Aug 31, 2005 |
Pneumonia |
waiting |
Table 2 : Details of confirmed H5N1 cases.
|
Duration |
Indonesia |
Vietnam |
Cambodia |
Thailand |
TOTAL |
|
|
Case |
Dead |
Case |
Dead |
Case |
Dead |
Case |
Dead |
Case |
Dead |
|
26 December - 10 March 2004 |
0 |
0 |
23 |
16 |
0 |
0 |
12 |
8 |
35 |
24 |
|
19 July - 8 October 2004 |
0 |
0 |
4 |
4 |
0 |
0 |
5 |
4 |
9 |
8 |
|
16 December 2004 - 27 July 2005 |
1 |
1 |
63 |
20 |
4 |
4 |
0 |
0 |
68 |
25 |
|
Summary |
1 |
1 |
90 |
40 |
4 |
4 |
17 |
12 |
112 |
57 |
*Patient definition:
- Suspected : Individual who has body temperature >38癈 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.