Pathogencity and Immuneology Host resistence and the immune response Essay

Pathogencity and Immuneology Host resistence and the immune response - Essay Example The bacterium has the ability to cause problems for people who use catheters and heart valve implants. It forms biofilms on these catheters and implants. Over time the bacteria has become resistant to antibiotics and it is because of this resistance that the bacteria has evolved in highly virulent forms. It has the ability to cause infections if removed from its ecological niche. It can also be said to be an opportunistic bacteria because it has the ability to cause pathology in people whose immunity is decreased. Variola Virus On the other hand Variola virus is a virus which causes small pox. Small pox is the only disease which has been eliminated from earth. The virus is brick shaped with a double stranded DNA. It also has an enzyme known as RNA polymerase which helps it to replicate when entering the body. Unlike Staphylococcus epidermidis the variola virus is transmitted through the external world. It does not reside in the normal flora or act as opportunistic bacteria. It can be transmitted through respiratory passageways and skin lesions unlike the bacterium staphylococcus epidermidis which resides inside the body. Staphyloccocus epidermidis may not be harmful in its ecological niche whereas the Variola virus is always harmful because of the disease that it can cause.