What context can I use each word in?
Learn when and how to use these words with these examples!
bacterium
Example
The scientist discovered a new bacterium in the soil sample. [bacterium: noun]
Example
Bacteria are responsible for causing certain infections in the body. [bacteria: plural noun]
pathogen
Example
The doctor identified the pathogen responsible for the patient's illness. [pathogen: noun]
Example
Pathogens can be spread through contaminated food or water. [pathogens: plural noun]
Good things to know
Which word is more common?
Bacterium is a more commonly used term in everyday language, as it encompasses a broader range of microorganisms. On the other hand, pathogen is more commonly used in scientific and medical contexts when referring to disease-causing agents.
What’s the difference in the tone of formality between bacterium and pathogen?
Both bacterium and pathogen are formal terms used in scientific and medical contexts. However, bacterium can also be used in more casual conversations when discussing general microorganisms.
