Sever's disease or calcaneal apophysitis is usually considered to be due to damage or a disturbance in this area of growth. The two growth areas of the calcaneus can be seen on this x-ray. The smaller area to the back of the heel is normal.hat are the long term consequences of heel pain in the child (Severs disease or Calcaneal apophysitis): This condition is self limiting-it will go away when the two parts of bony growth join together-this is natural.
So, a virus must have a host cell (bacteria, plant or animal) in which to live and make more viruses. Outside of a host cell, viruses cannot function. For this reason, viruses tread the fine line that separates living things from nonliving things.
Hostas grown in soil low in nitrogen and magnesium might have less healthy leaves that are yellower than they should be. Both nitrogen and magnesium are needed to create healthy green chlorophyll. Growing hostas in soil of pH 7.2 or higher can cause a hosta to have difficulty absorbing iron, manganese, and phosphorus.