CIDRAP REPORTS

In other developments, a man in Vietnam who was hospitalized with possible avian flu tested negative yesterday, according to news services. The patient is from the southern province of Kien Giang, on the Cambodian border in the Mekong Delta. Vietnam hasn't had a confirmed human H5N1 case since November 2005.

Three people in Thailand have also been cleared of H5N1 infection, according to the Bangkok Post. One is a 9-year-old girl from Lop Buri province in central Thailand who died 2 days ago. The other two patients—a 17-year-old boy and a 42-year-old woman—are from Chachoengsao province, east of Bangkok. The tests indicated that all three patients had a type A flu virus, but not H5N1, the newspaper said.

As of yesterday, the Thai Health Ministry reported that 97 patients from 24 provinces were under surveillance for possible avian flu. Those numbers were down from 164 patients in 21 provinces the previous day.

Thailand's only confirmed human H5N1 case this year was in a 17-year-old boy from Phichit province who died of the disease Jul 24. A report in the Aug 3 Eurosurveillance Weekly suggests that the boy's death indicates that poultry deaths in Thailand are being underreported. The authors observe that poultry deaths in the country were not reported until Jul 24, the day the boy died.

The boy's case may be an example of a "sentinel human," meaning a human H5N1 case that triggers reporting of the disease in poultry, the report says.

See also:

Eurosurveillance Weekly report on avian influenza in Thailand
http://www.eurosurveillance.org/ew/2006/060803.asp#1