droppings

It is unclear what the source is in each system, but experts say it could be from unpasteurized milk, wild bird droppings or discarded contaminated animal products.

It spreads through birds' droppings and saliva, or through contaminated feed and water.

During the visit, the migrants walked the court through military tents they have been living in, pointing out damp, tears in the canvas, droppings, and a rats’ nest above one of the beds.

Officials say they have not identified the source of the virus, but suggested a few possibilities, including discarded contaminated animal products and infected wild bird droppings.

He does not track the animals themselves, but is trained to detect their droppings.