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.
Although latent infections don't cause the production of new viruses, they cause the viral genetic material to be replicated. One way for a bacteriophage to cause a latent infection is the virus injects their genetic material into the host cell and then the capsid gets degraded. The viral genetic material becomes circularized and basically becomes a piece of plasmid DNA inside the bacterial cell (plasmid DNAs can replicate independently of the host cell's chromosomal DNA).