👉 The term "etiologue" is a combination of two Greek words, "eta" meaning "cause" and "logia" meaning "study". It refers to individuals or institutions that study the causes of diseases, including infectious diseases. Etiologists are typically involved in research and diagnosis of chronic diseases by studying human behavior and environmental factors that contribute to these conditions. They use a combination of laboratory testing, patient interviews, and clinical observations to understand how diseases develop and progress over time.