Pathogen

noun
/ˈpæθədʒən/
Any microorganism — such as a bacterium, virus, fungus, or parasite — capable of causing disease in a host organism.

✍️ Usage in a UPSC answer

India's recurrent public-health crises underscore the need for a robust One Health surveillance architecture, since zoonotic pathogens that leap from animal reservoirs to human populations can swiftly overwhelm an unprepared healthcare system.

Synonyms

germmicrobeinfective agentcontagionmicroorganismbug

Antonyms

probioticantigen-free agent

🌱 Word Family

pathogenic (adj), pathogenicity (n), pathogenesis (n), pathology (n), pathological (adj)

🔡 Root

Greek pathos = suffering, disease; -genēs = born of, producing → pathogen = disease-producer

📜 Etymology

From Greek pathos (suffering, disease) + -genēs (born of, producing); first used in English in the 1880s.

🧠 Memory Hook

Break it as "PATHO-GEN": "patho-" (as in pathology, suffering/disease) + "-gen" (generator) — literally a "disease-generator".

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