Thailand:Avian Influenza surveillance in human as at March 15, 2005

Avian Influenza surveillance in human
As at March 15, 2005.
Bureau of Epidemiology, Department of Diseases Control, Ministry of Public Health

I. Avian Influenza in human situation 2005

Since January 1, 2005 to March 15, 2005, the Bureau of Epidemiology has received 415 cumulative reports, 57 provinces of influenza or pneumonia cases in Avian Influenza Surveillance Network from the Provincial Health Offices and Disease Prevention and Control Regional Offices. The results of preliminary investigation were summarized as follows:
  1. No new confirm case.
  2. New cases = 2, from 2 provinces : One cases each from Bangkok Metropolis and Sukhothai.
  3. Cases under investigation, either additional clinical information or past history of risk factors are needed: = 6 from 4 provinces; Three cases from  Bangkok Metropolis, 1 each from Nonthaburi, Sukhothai and Phetchaburi. (table 1)
  4. Excluded cases, either the findings did not comply with the definitions or laboratory result revealed other causes : 409 cases. .

II. Avian Influenza in human situation 2004

  1. Confirmed cases by laboratory detection of Influenza A (H5N1). 
            Total = 17; recovered = 5 and deaths = 12
  2. 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
  3. Suspected cases, which the signs complied with the definitions.
       Total = 22; recovered = 13 and deaths = 9

III. Avian Influenza International Situation, www.who.int

 

·     In Vietnam, laboratory investigation confirmed that 41 years old nurse (who had been nursing care 21 years old avian influenza patient in the hospital), is not infected avian influenza disease. 

·      World Health Organization had reported H5N1 confirmed cases in Vietnam since 28 January 2004, to 11 March 2005 = 51, deaths = 33; one dead confirmed case from Cambodia; and the number of 17 cases with 12 deaths in Thailand. (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 October 1, 2004, to March 14, 2005 showed the areas where the outbreak are still active and the 21 days surveillance are not complete in 9 tambons, 4 provinces; Suphanburi, Phichit, Uttaradit and Kampaengphet. The areas waiting for laboratory result = 25 provinces, 55 tambons.

 

Table 1 : Details of 6 cases under investigation.

No.

Sex

Age
(yrs.)

District

Province

 Contact chicken
history

Dead chicken
nearby

Onset

Diagnosis

1

M

48

Klong tei

Bangkok Metropolis

No

No

Mar 11, 2005

Bronchitis

2

M

39

Wattana

Bangkok Metropolis

No

No

Mar 11, 2005

Bronchitis

3

F

5

Samsen Nai

Bangkok Metropolis

Yes

No

Mar 13, 2005

URI

4

M

11

Sawankalok

Sukhothai

No

No

Mar 11, 2005

URI

5

M

75

Pak kret

Nonthaburi

No

No

Mar 13, 2005

Pneumonia

6

F

27

Ban Lam

Phetchaburi

No

No

Mar 8, 2005

Bronchitis

Table 2 : Details of confirmed H5N1 cases.

Duration

Vietnam

Cambodia

Thailand

 

Case

Dead

Case

Dead

Case

Dead

 January-March 2004

23

16

0

0

12

8

 August-October 2004

4

4

0

0

5

4

 December 2004-March 2005

24

13

1

1

0

0

 Summary

51 

33

1

1

 17

12

*Patient definition:

  1. 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,
  2. 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,
  3. Confirmed : suspected case with final laboratory result indicated influenza A (H5) of which is avian strain by PCR or by virus culture,
  4. Excluded : any patient who is not compatible with the aforementioned definition or laboratory result proved to be other causes.
  5. 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.