from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Diagnosis of an infectious disease at an early stage by exposing a presumably infected individual or tissue to a clean, laboratory-bred mosquito, tick, or other vector and then examining the vector for the presence of the infective microorganism.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. diagnosis of an infectious disease (especially of trypanosomiasis) by exposure to a vector of that disease, incubating the vector and examining it for the presence of the disease
xeno- + diagnosis (Wiktionary)