Translation guide
A pathogen is a microorganism that causes disease. In Japanese, the most common and general term is 病原体 (byōgentai). Depending on context, more specific terms like 病原菌 (byōgenkin) for bacteria or ウイルス (uirusu) for viruses may be used.
The speaker wants to refer to any microorganism (bacteria, virus, fungus, etc.) that can cause disease.
This is the standard, scientific term for 'pathogen' and is widely understood. It covers all types of pathogens.
この病原体は感染力が強い。
This pathogen is highly contagious.
病原体の特定には時間がかかる。
Identifying the pathogen takes time.
Literally 'pathogenic bacteria'. This is often used in everyday language to refer to germs that cause illness, but technically it only refers to bacterial pathogens.
Strictly speaking, this refers only to bacteria. For viruses or fungi, use 病原体 or the specific term.
手洗いは病原菌の予防に効果的だ。
Handwashing is effective in preventing pathogens.
The speaker wants to refer to a specific kind of pathogen, such as a virus, bacterium, or fungus.
Used for viral pathogens. This is a loanword from English and is very common.
新型ウイルスが世界中に広がった。
A new pathogen spread around the world.
Means 'bacterium'. In medical contexts, it often implies a pathogenic bacterium.
Means 'fungus'. Used for fungal pathogens.
Means 'parasite'. Used for parasitic pathogens like protozoa or worms.
病原体 (byōgentai) is the all-encompassing term for any disease-causing agent, including viruses, bacteria, fungi, and parasites. 病原菌 (byōgenkin) specifically means pathogenic bacteria. In casual conversation, 病原菌 is sometimes used loosely for germs, but in precise contexts, 病原体 is preferred.
In Japanese, it's often more natural to use the specific type of pathogen (ウイルス, 細菌, etc.) rather than the generic 病原体, especially in news or everyday talk. For example, 'The pathogen was identified as a new virus' would be 病原体は新型ウイルスと特定された, but simply 新型ウイルスが特定された is more common.
この細菌は抗生物質に耐性がある。
This pathogen is resistant to antibiotics.
Infections caused by fungal pathogens are increasing.
マラリアは寄生虫が原因の病気だ。
Malaria is a disease caused by a pathogen (parasite).