The microorganism which causes the disease of bitterness (amer) forms longish branched filaments in the wine.
It is caused by a microorganism termed Mycoderma aceti, which occurs in wine in small groups and chaplets of round cells.
Because microorganism activity slows down, fewer nutrients are available in the soil.
For older children and adults, if there is a question as to the cause of a sore, a tissue sample or culture can be taken to determine what type of virus or other microorganism is responsible.
Then they develop .definite fibrils which differentiate into fibrous laminae forming a zone which shuts off the abscess from the healthy tissue and so prevents the further invasion and injurious effects of the microorganism.