RAGPTM: Antiserum in the Rabbit from the Guinea Pig Tympanic Membrane

What does RAGPTM mean? The above is one of RAGPTM meanings. It may have other definitions. Please refer to the end of this passage.

RAGPTM: Antiserum in the Rabbit from the Guinea Pig Tympanic Membrane

Definition in English: Antiserum in the Rabbit from the Guinea Pig Tympanic Membrane