The presence of antibodies is an indication of an existing or previous infection. Antibodies were also found in chickens and ducks by a national laboratory in Bogor, and confirmatory tests on the animal samples are underway, Apriantono said.

The detection of H5 antibodies in swine in Karo, Indonesia is cause for concern. The lone human H5N1 from Indonesia has a novel HA cleavage site and a report has indicated that many human sequences from Indonesia have this sequence, implying infections were not from poultry. A source for the H5N1 that killed six family members in Karo has yet to be identified.

Source: Recombinomics