A 42 year old man comes to the physician because of a discoloration on his right leg for six months. It first look like a bruise, but they didn’t gradually increase in size and did not change color. He works as an adventure tourism guide and has led numerous trips to central Africa, south east, Asia, and South America. Physical examination shows 4.2 cm purple macule with irregular borders on the right calf. Which of the following is the most likely causal virus? M A) cytomegalovirus B) Epstein bar virus C) herpes simplex virus one D) human herpes virus eight E) human papilloma virus type 16 F) parvovirus B19 G) varicella zoster virus

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Viral Infections

Viruses are abundantly found, minute entities that have genetic material enclosed within a protein coat. The proteinaceous material enclosing the genetic material of the virus is called a capsid. The genetic material could be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A virus is too minute to be looked at with naked eyes and therefore visualized with the help of a microscope. They are acellular entities that require a host for processes, such as replication, transcription, translation and multiplication. Plants, animals, and bacteria act as host wherein the virus reproduce. Viruses cannot multiply outside the host's body and thus are considered nonliving outside the host body.