36. Shingles is a viral disease that causes a painful skin rash. You can only ge

Question

36. Shingles is a viral disease that causes a painful skin rash. You can only get shingles if you have already had chicken pox. Chicken pox is caused by the varicella zoster virus. Shingles generally appears in older adults. Chicken pox has historically been a childhood disease (although novw there is a vaccine for chicken pox). After you recover from chicken pox, the varicella zoster virus goes dormant. Shingles appears later in life when the varicella zoster virus reactivates in your body. You cannot get shingles from someone who has shingles, but a person with shingles can spread chicken pox to a person who has not had chicken pox (and who has not had the chicken pox vaccine), A. What is the difference between lytic and lysogenic viral replication? B. Is the varicella zoster virus a lytic or lysogenic virus? Explain.

Explanation / Answer

A.in the lytic cycle the viruses replicate constantly which results in theeventual lysis, or death, of the host cell to release the new viruses while in the lysogenic cycle the virus replicates only with the regular cellar mechanism for reproduction .

B.Varicella zoster's replication cycle is categorized as a lysogenic. This is different from a lytic in that it takes longer from the initial infection/exposure for signs and ssymptoms to develop. This period is known as the incubation period and can vary in length depending on thevirus.

37.They have no energy metabolism, they do not grow, they produce no waste products, and they do not respond to stimuli. They also don't reproduce independently but must replicate by invading living cells.

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