Because saliva contains bacteria from your mouth.
i have contaminate the food by putting my dirty hand on the food.
Yes
If it gets into food yes! It is poisonous.
Yes, bleach fumes can contaminate food if the food is exposed to the fumes directly or if the fumes are present in the air around the food. It is important to keep bleach and food separate to prevent contamination.
No - not in your own food in your own home.
pests contaminate food by landing on the food and leaving there waste ,if you may, like flies whenever they land they vomit, leave waste, and urine. pests also contaminate food just by carrying diseases.
When food is intentionally expelled from the mouth, it is called spitting out or spitting up. If it is unintentional, it may be referred to as regurgitation or vomiting.
through organisms which contaminate food like house fly
cross contamination
Most countries encourage people to swallow food rather than spitting it out.
By spitting juices on the food, then slurping the mixture up.
Some behaviors that can contaminate food include toileting, not washing hands, chewing fingernails, picking nose, bad body odor, and scratching face or behind.