Yeah this stuff is pretty general knowledge. An infection ingame is just grimy shit getting in the wound-- admittedly very realistic for a zombie to give, probably less so for an ant or woodland animal, but still possible. If you want to know more about the Blob and its relation to zombies, a lot of it is in lab notes, fliers, newspapers, forum snippets and even some from survivor's notes. You can also observe plenty yourself ingame just by playing around with mutagen. 