An agent (microorganism or virus) that causes disease; a pathogen responsible for infectious disease.
新しい病原体が確認され、保健当局が調査を始めた。
A new pathogen was identified, and health authorities have begun an investigation.
病原体は手洗いや消毒で感染拡大を防げることが多い。
Pathogens can often be prevented from spreading by handwashing and disinfection.
この患者の体内から複数の病原体が検出された。
Multiple pathogens were detected in this patient's body.