This piece appeared in BBC News Website today 06/04/06
It is vital to restrict the spread of bird flu in cats in order to protect human health, scientists warn.
Writing in Nature, scientists from Erasmus Medical Centre, Rotterdam, say the risk is being overlooked.
They say cats can contract the virus by eating infected chicken or through close contact with other cats - both new ways of mammals becoming infected.
However, animal health experts said there was a "limited risk" to humans from infected mammals with H5N1 flu.
The first report of domestic cats dying of the H5N1 virus emerged in Thailand in 2004 when 14 out of 15 cats in a household near Bangkok fell ill and died.
One had eaten a chicken carcass on a farm where there was an outbreak of the virus.
Post-mortem examinations on three of the cats confirmed the presence of H5N1.
Since then, there have been deaths among cats in Indonesia, Thailand and Iraq, where H5N1 appears to be prevalent among poultry.
And the disease is common among cats in Indonesia.
A dead cat was also found in Germany in March after the H5N1 virus was found in wild birds.
There have been reports of big cats dying from the deadly H5N1 virus - including 147 tigers who died in a Thai zoo after eating infected chicken.
The Erasmus researchers say there is too little data to establish what the minimum dose needed to infect cats is or whether cats can excrete the virus even if they are uninfected.
It is also not known whether they can transmit the virus back to poultry or even on to humans.