epidemiologist
virologist
toxicologist
oncologist
epidemiographer
epidemiographist
-logue
-log
bioecologist
immunologist
diagnostician
ophiologist
serologist
biogeologist
ovologist
environmental scientist
genomicist
bioscientist
infectiologist
bioresearcher
biosystematist
osteologist
beaker
nosologist
infectious disease specialist
missiologist
biogerontologist
medical man
medical practitioner
bedoctor
bioanalyst
animalist
phylogeographer
biospeleologist
chemoecologist
doctorer
chemometrician
biophysiologist
clinician
physiologist
hematologist
odonatologist
biotoxicologist
haematologist
raciologist
pathobiologist
biogeoscientist
electrobiologist
uredinologist
personologist