A virus or fungus ?
Bacteria
pathogen
The pathogen would multiply in the dish.
Technically a 'pathogen' IS measels. A pathogen is a fancy name for Bacteria. And a pathogen is a bacteria that IS a certin disease. Hencforth, the answer to your question would be measles IS its own pathogen.
After your first exposure to a pathogen, you have memory T-cells that will remember the antigen of the pathogen so in the future if you would come in contact with the same pathogen your body would recognize it right away and be able to kill it much faster.
Papaya, blackcurrants, lemons and blueberries (the juice of which was actually used by the Celts as an antibacterial which they would put on wounds to prevent infetion) You could also try honey which is renowed for being very antibacterial
A very broad answer to a very broad question... A "pathogen" as defined by a dictionary would be, "any disease-producing agent, esp. a virus, bacterium, or other microorganism." First- a "pathogen" in drinking water will cause nothing unless someone or something drinks the water or if the "pathogen" enters the body/host by some other means... Second- even once the "pathogen" enters the body it may still cause nothing, as the quantity of the "pathogen" must be sufficient to cause the would be disease... Third- because a "pathogen" could be any one of millions of things, what disease would be caused by your hypothetical "pathogen in the drinking water" would depend entirely on what it is... You should seriously consider being more specific about your question. If you are interested in a specific pathogen and the associated disease, please try again.
Bacterium Fungi Viruses Pathogen pathogen is correct but not protozone because the one that carries disease is the pathogen and it is also one ofthe main four. You could say it is a protozone but, the better answer would be Pathogen. So protozone is not in the main four.
The first line of defense against a pathogen would be barriers. Ex. The skin, Breathing Passages, and The Mouth and stomach.
That would be a virus.
In medicine, the locus where a pathogen can enter would be any part of the body or surface that is moist. This includes the eyes, the nose and the mouth.
Actually, antibacterial soap and antibacterial sanitizers usually do about the same job on bacteria, killing roughly 99.99% of germs. But if its a question of which should you rather use, I would choose sanitizers because soap leaves nasty residue called soap scum which can make your hands feel greasy and disgusting:(