Which of the following statements can be used to describe a pathogen? (A) They are all viral - HSC - SSCE Biology - Question 1 - 2004 - Paper 1

Among the options provided, the only statement that can be universally used to describe all pathogens is:

(B) They are all infectious.

A pathogen is defined as an organism that can cause disease, which inherently makes them infectious.

• (A) They are all viral. This is incorrect as pathogens can be bacterial, fungal, parasitic, or viral.
• (C) They are all microscopic. While many pathogens are microscopic, not all are necessarily so; for instance, some parasites are macroscopic.
• (D) They are all macroparasites. This is also incorrect, as not all pathogens fit into the category of macroparasites.