Last Updated：2025/11/20
(pathology, immunology) Any organism or substance, especially a microorganism, capable of causing disease, such as bacteria, viruses, protozoa or fungi. Microorganisms are not considered to be pathogenic until they have reached a population size that is large enough to cause disease.
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pathogen
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Source Word
pathogen
IPA(Pronunciation)
Noun
Japanese Meaning
病原体：病気を引き起こす能力を持つ微生物や物質。具体的には、細菌、ウイルス、原虫、真菌などが含まれ、病原性は微生物の場合はその個体数が十分な大きさに達して初めて現れる。
（ plural ）
