Via BBC News: Cats and dogs to be tested for mysterious Mers infection. Excerpt:
A recent study showed conclusively that the version of the virus circulating in humans is indistinguishable from the one that's been found in camels.
However the lead author of that report, Dr Thomas Briese from Columbia University, believes that there are many unanswered questions about the disease.
He points to the fact that if camels were the sole route of infection, then the illness should be more prevalent among those who work with or are in close contact with the animals.
And there have been a small number of cases of people dying from Mers who have no known relationship with camels.
"We do have these sporadic cases where there is no known exposure to known cases and we question where do they catch the virus," he told BBC News.
"In some cases there was animal contact or camel contact but in others not, so there is no clear definitive picture yet."
Dr Briese says that other species, including goats and sheep, have been tested but haven't shown antibodies indicating exposure.
Another report showed that the geographic distribution of the disease in camels is far more widespread than previously thought, with significant reservoirs in Nigeria, Ethiopia and Tunisia.
Adding to the Mers mystery, there have been no reports of people dying from the respiratory infection in these areas.
These unknowns, says Dr Briese, are pushing researchers to extend the search for the Mers coronavirus to domestic animals.
"The others that we are looking into or are trying to look into are cats, dogs where there is more intimate contact, and any other wild species we can get serum from that we are not currently getting."