One example is Lassa fever, which can be transmitted through rat urine.

At various times, including the last ice age, rat urine disappears completely from the sedimentary record in Nevada, as it does elsewhere in the world.

C3 Clues to the past from deposits of rat urine.

Mr. Betancourt has unearthed some clues as to what happened to them, thanks to the preservative qualities of crystallized rat urine.

An award-winning children's book illustrator reveals the secret behind her art: rat urine.

What sort of people were exposed to rat urine?

At high doses, saccharin causes a precipitate to form in rat urine.

We were later told it was rat urine we had seen and smelled.

One part, rat urine, for the rats were everywhere and only a gas attack got rid of them.