IPA: /ˌzɛnəʊdaɪəɡˈnəʊsɪs/
KK: /zɛnəˈdaɪəɡnəsɪs/
A method used to diagnose an infectious disease by exposing a potentially infected person or tissue to a clean insect, like a mosquito, and then checking the insect for the disease-causing germs.
The doctor used xenodiagnosis to determine if the patient had the infection by observing the mosquitoes that fed on them.
Xenodiagnosis → It is formed from "xeno-" (from Greek "xenos", meaning foreign) and "diagnosis" (from Greek "diagnōsis", meaning discernment or judgment). The term refers to the process of diagnosing a disease by exposing a host to a foreign organism, typically a parasite, to observe any resulting infection.
Think of 'foreign' ('xeno-') and 'discernment' ('diagnosis') to remember that xenodiagnosis involves diagnosing by observing how a foreign organism affects a host.