There is currently no indication of adaptation of the A/H1N1 virus after pigs were found infected in Canada, the World Health Organization (WHO) said on Sunday.

Canada reported on Saturday the identification of the A/H1N1 virus in a swine herd in the western province of Alberta. This is the first time that pigs have been found infected by this new virus, although it originated from pigs.

"It is highly probable that the pigs were exposed to the virus from a Canadian farm worker recently returned from Mexico, who had exhibited flu-like symptoms and had contact with the pigs," the WHO said in a statement.

"There is no indication of virus adaptation through transfer from human to pigs at this time," it said.

"There is no risk of infection from this virus from consumption of well-cooked pork and pork products," the statement added.

Meanwhile, the WHO confirmed on Sunday a total of 787 human cases of influenza A/H1N1 from 17 countries and regions worldwide.

Mexico, the epicenter of the outbreak, has reported 506 confirmed human cases of infection, including 19 deaths.

"The higher number of cases from Mexico in the past 48 hours reflects ongoing testing of previously collected specimens," indicating that new infections are actually slowing down in the country, the WHO said.

The United States government has so far reported 160 laboratory confirmed human cases, including one death.

(Xinhua News Agency May 4, 2009)