The term disease causative agent usually refers to the biological pathogen that causes a disease, such as a virus, parasite, fungus, or bacterium. Technically, the term can also refer to a toxin or toxic chemical that causes illness .
A disease causative agent is substance that causes disease. Examples include a biological pathogens ( such as a virus, bacteria, parasites, and fungus), toxins, tobacco, radiation, and asbestos .
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The term
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usually refers to the biological pathogen that causes a disease,
is substance that causes disease. Examples include a biological pathogens (
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parasite, fungus, or bacterium. Technically, the term can also refer to a toxin or toxic chemical that causes illness
bacteria, parasites, and fungus), toxins, tobacco, radiation, and asbestos