| − | A '''pathogen''' is an [[organism]] that causes [[disease]].<ref>Wile, Dr. Jay L. ''Exploring Creation With General Science''. Anderson: Apologia Educational Ministries, Inc. The most common pathogens are [[bacteria]](such as [[Escherichia coli|E Coli]], [[viruses]](such as the influenza virus), [[fungi]](such as [[Ringworm]]) and [[protozoa]](such as [[Giardia lamblia|Giardia]]). | + | A '''pathogen''' is an [[organism]] that causes [[disease]].<ref>Wile, Dr. Jay L. ''Exploring Creation With General Science''. Anderson: Apologia Educational Ministries, Inc. 2000</ref> The most common pathogens are [[bacteria]] (such as [[Escherichia coli|E Coli]]), [[viruses]] (such as the influenza virus), [[fungi]](such as [[Ringworm]]) and [[protozoa]](such as [[Giardia lamblia|Giardia]]). |