Concept explainers
Introduction:
A virus is a small infectious agent that cannot be seen through the naked eyes. Viruses are made up of protein coat in which their genetic material is present. The viruses contain either double stranded or single stranded DNA or RNA as their genetic material. Based on their genetic material David Baltimore classified viruses into seven different classes.
Answer to Problem 1Q
Correct answer:
Herpes virus is the infectious agent that has evolved to maintain a persistent state in its host.
Therefore, option (b) is correct.
Option (b) is given as “herpes virus”.
Explanation of Solution
Justify the reason for the correct statement:
Human herpes virus 3 is the causative agent of chickenpox. Herpes virus enters into the respiratory mucosa, and from there it enters the bloodstream. This condition is called as viremia. From the blood, the virus can enter into the skin, and produce its characteristics lesion. Through blood, the virus can enter into the sensory nervous system and the dorsal root of ganglia. In ganglia of the host cell, the virus can persist there for a long time and escape from host cell immunity.
Hence, option (b) is correct.
Justify the reasons for the incorrect statements:
Option (a) is given as “Variola virus”.
Variola virus does not have the ability to persist in a host cell. Hence, it is a wrong answer.
Option (c) is given as “vaccinia virus”.
Vaccinia virus does not have the ability to persist in a host cell. Hence, it is a wrong answer.
Option (d) is given as “Staphylococcus aureus”.
S. aureus does not have the ability to persist in a host cell. Hence, it is a wrong answer.
Hence, options (a), (c), and (d) are incorrect.
Human herpes virus has an ability to remain latent in a host cell.
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Chapter 16 Solutions
MICROBIOLOGY FUNDAMENTALS ACCESS CARD
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- The Sabin vaccine contains ______. A) a mixture of bacteria and live, attenuated poliovirus B) a piece of the poliovirus C) inactivated poliovirus D) live, unattended poliovirusarrow_forwardIf a person contracted MRSA and no antibiotics are working on them, how would you go about finding a way to treat their infection? Describe, in detail, how you would devise a plan to save their life utilizing your knowledge of bacteria and viruses.arrow_forwardWhich of the following is not a DNA virus?(a) Adenovirus (d) Herpesvirus(b) Poxvirus (e) Orthomyxovirus(c) Papovavirusarrow_forward
- Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage Learning