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Consider the viruses you studied in this chapter. Which three would you rank as the deadliest?
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Ch. 25 - Pathogenic RNA Viruses
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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TOC.tableOfContents
- Ch. 1 - A Brief History of Microbiology31
- Ch. 2 - The Chemistry of Microbiology28
- Ch. 3 - Cell Structure and Function39
- Ch. 4 - Microscopy, Staining, and Classification25
- Ch. 5 - Microbial Metabolism51
- Ch. 6 - Microbial Nutrition and Growth37
- Ch. 7 - Microbial Genetics51
- Ch. 8 - Recombinant DNA Technology21
- Ch. 9 - Controlling Microbial Growth in the Environment36
- Ch. 10 - Controlling Microbial Growth in the Body: Antimicrobial Drugs21
- Ch. 11 - Characterizing and Classifying Prokaryotes29
- Ch. 12 - Characterizing and Classifying Eukaryotes34
- Ch. 13 - Characterizing and Classifying Viruses, Viroids, and Prions23
- Ch. 14 - Infection, Infectious Diseases, and Epidemiology35
- Ch. 15 - Innate Immunity34
- Ch. 16 - Adaptive Immunity21
- Ch. 17 - Immunization and Immune Testing29
- Ch. 18 - Immune Disorders22
- Ch. 19 - Pathogenic Gram-Positive Bacteria25
- Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli28
- Ch. 21 - Rickettsias, Chlamydias, Spirochetes, and Vibrios25
- Ch. 22 - Pathogenic Fungi47
- Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors44
- Ch. 24 - Pathogenic DNA Viruses23
- Ch. 25 - Pathogenic RNA Viruses30
- Ch. 26 - Applied and Industrial Microbiology29
- Ch. 27 - Microbial Ecology and Microbiomes22
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Capitolo 25, Problema 4
Which of the following viruses cause most colds?
a. Rhinoviruses
b. Parainfluenza viruses
c. Pneumoviruses
d. Bunyaviruses
Guida verificata passo dopo passo1
Understand that the common cold is primarily caused by viruses that infect the upper respiratory tract.
Recall that rhinoviruses are the most common viral agents responsible for the majority of common cold cases.
Recognize that parainfluenza viruses and pneumoviruses can cause respiratory infections but are more often associated with other illnesses like croup or bronchiolitis, not the common cold.
Note that bunyaviruses are generally linked to other diseases such as hemorrhagic fevers and are not typical causes of the common cold.
Conclude that among the options given, rhinoviruses are the viruses that cause most colds.
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Rhinoviruses and the Common Cold
Rhinoviruses are the primary cause of the common cold, responsible for up to 50% of cases. They are small RNA viruses that infect the upper respiratory tract, leading to symptoms like runny nose and sore throat. Their high variability allows frequent reinfections.
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Three Common Shapes of Viruses
Parainfluenza Viruses
Parainfluenza viruses mainly cause respiratory illnesses such as croup and bronchitis, especially in children. While they can cause cold-like symptoms, they are not the predominant cause of the common cold compared to rhinoviruses.
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Pneumoviruses and Bunyaviruses
Pneumoviruses, including respiratory syncytial virus (RSV), primarily cause lower respiratory tract infections, especially in infants. Bunyaviruses are mostly transmitted by arthropods and cause diseases like hemorrhagic fevers, not common colds.
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Arboviruses are ___________.
a. zoonotic pathogens
b. deactivated viruses used in vaccines
c. viruses that are transmitted to humans via the bite of an arthropod
d. found in arbors
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Why is AIDS more accurately termed a “syndrome” instead of a “disease”?
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The smallest animal viruses are in the family ___________.
a. Caliciviridae
b. Astroviridae
c. Togaviridae
d. Picornaviridae
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_____Postpolio syndrome is due to latent polioviruses that become active 30 to 40 years after the initial infection.
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_____Because the oral polio vaccine contains live attenuated viruses, mutations of these viruses can cause polio.
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