Officials Point Wild Birds For Hong Kong Bird Flu Outbreak

An outbreak of the deadly H5N1 bird flu virus at a Hong Kong farm last year which led to the slaughter of 90,000 chickens was likely spread by wild birds, an investigation found Thursday.

The December outbreak was the first discovered at a Hong Kong poultry farm in six years, and raised fears about the city's biosecurity measures and whether the deadly H5N1 virus had mutated.

Avian Influenza / Bird Flu-Causes-Symptoms-Treatment- FAQs
Bird flu (avian influenza/avian flu) is a disease caused by an influenza virus (H5N1) that primarily affects birds but can infect humans also.

"As with many epidemiological studies of this nature, it is difficult to determine the exact cause of the outbreak," said Thomas Sit, the head of the government's investigation team.

But he said the virus was "most likely to have been introduced to the farm by wild birds".

The dust and dirt near the entrance of one of the two affected chicken sheds could have been contaminated by droppings from infected wild birds and then blown into the shed area by a gust of wind, Sit said.

Quiz on Flu
Influenza (or rather, the flu) is a cold weather infectious condition that affects the young and old alike. Though most reported cases are mild, the flu can sometimes cause severe and life-threatening complications in both children and adults, thanks to wrong medications and improper vaccinations. Learn more about the disease from our Flu Quiz and guard yourself and your family from a possible infection.

He added that they could not totally eliminate other sources, such as rodents or contaminated clothing of farm staff.

Sit said the farmer, who ran one of the city's major poultry farms, had been warned to improve biosecurity measures, but would not face further action.

Baby Girl of Hong Kong Infected By Mild Form of Bird Flu
A Hong Kong-born infant has contracted a mild form of bird flu, the fifth case of its type in the territory, health authorities said Tuesday.

Cheung Siu-hing, director of city's agriculture department, said authorities would strengthen biosecurity measures for all Hong Kong poultry farms by increasing the number of inspections and testing of blood samples.

"It is difficult, if not impossible, to say we can 100 percent prevent the spread of avian flu. That's why we have to learn from each incident. We can't afford to be complacent," she told reporters.

American ‘wild’ birds identified as culpable for spreading bird flu
American researchers have revealed that the common wood duck and laughing gull have been found to be vulnerable and prone to infection with the highly virulent H5N1 bird flu virus .

The outbreak was discovered after a dead chicken was found at the farm in the New Territories area of Hong Kong, near the border with China.

All chickens within a three-kilometre (1.9-mile) radius of the farm were slaughtered, local farms were barred from selling chickens and eggs for 21 days and imports of chickens were banned for the same period.

Hong Kong was the scene of the world's first reported major bird flu outbreak among humans in 1997, when six people died. Since then, H5N1 has killed more than 250 people worldwide.

Scientists fear the virus could mutate into a form which is much more easily transmissible between humans, triggering a global pandemic that could kill millions.

Sit said genetic analysis showed the virus was of the type commonly found in southern China, but added it could have come from anywhere in Asia.

Hong Kong's Health Secretary, York Chow, said the city needed to stay on full alert against avian influenza which posed an imminent worldwide threat.

"To help achieve such a task, the biosecurity measures of local chicken farms will be vital to minimise the risk of avian influenza," Chow said in a statement.

The role of wild birds in the spread of bird flu is not yet fully understood and many experts say they have been unfairly scapegoated as a distraction from the more pressing risks of intensive poultry farming.

Source-AFP
SRM