A World Health Organization official on Thursday called for stronger surveillance in animals for evidence of infection with H5N1 bird flu in order to curb its spread.
The official also urged stronger efforts to reduce the risk of transmission of the virus to new species of animals and to humans.
“What we really need globally, in the U.S. and abroad, is much stronger surveillance in animals, in wild birds, in poultry, in animals that are known to be susceptible to infection,” WHO epidemiologist Maria Van Kerkhove told an online press conference.
The agency said it is in touch with partner agencies such as the World Organization for Animal Health and Food and Agriculture Organization to increase surveillance in animals.
The U.S. Department of Agriculture last month confirmed the presence of H5N1 bird flu in a pig on a backyard farm in Oregon.
Pigs represent a particular concern for the spread of bird flu because they can become co-infected with bird and human viruses, which could swap genes to form a new, more dangerous virus that can more easily infect humans.