yeast
Saccharicmeces Cervaeces, Known to you and I as Yeast is the primary microbe used in the making of alcoholic beverages. It is the same yeast (Although a different strain) as what is used in the breadmaking process.
pathogen
Maybe
Well, there is lactobacille which is a good microbe and theres rhinovirus a bad microbe and plenty others.
it is a good microbe
The ancient Greeks (and some modern ones) made wine because they didn't have potable water. Without understanding the reason why, they made the connection between bad health and bad water, and good health and wine.
You present the wine label to confirm that the bottle is what the host ordered. If an error has been made then it is better to find out before the bottle is opened.
To keep it from drying out and letting air seep into the bottle which will make the wine bad in other words corked.
It depends on the microbe. Some can not and others become 'dormant'.
After a while, white wine can deteriorate in quality.
life is too schort for drinking bad wine