Federal MP Bob Katter says the case for the removal and culling of flying foxes is unassailable after the latest case of the rare bat-borne lyssavirus.

A horse in southwest Queensland has been confirmed as the first to contract the virus.

The horse was euthanased on May 11 after displaying symptoms similar to those associated with the Hendra virus, which is known to affect horses through bat droppings.

Tests returned late on Friday indicate it was in fact infected with the deadly Australian Bat Lyssavirus (ABL), previously thought to affect only bats and humans.

In February an eight-year-old boy died from the rare virus in Brisbane.