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.
Introduction 1. Define virus. 2. List the characteristics of viruses. 3. Describe the: Â· Composition of a virus Â· Location of viral multiplication Â· Host range viruses. 4. Explain what determines viral host range. 5.List the three kinds of viruses according to type of hosts. Viral Structure 6.Define: Â· Virion Â· Capsid Â· Capsomere Â· Protomere. 7.. List the characteristics of viruses. 3. Describe the: Â· Composition of a virus Â· Location of viral multiplication Â· Host range viruses. 4. Explain what determines viral host range. 5. List the three kinds of viruses according to type of hosts. Viral Structure 6.