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How might phage conversion provide a bacterium with an evolutionary advantage?
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Ch. 6 - Viruses and Prions
Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619
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TOC.tableOfContents
- Ch. 2 - Biochemistry Basics19
- Ch. 4 - Introduction to Eukaryotic Cells16
- Ch. 6 - Viruses and Prions12
- Ch. 8 - Microbial Metabolism16
- Ch. 9 - Principles of Infectious Disease and Epidemiology11
- Ch. 10 - Host Microbe Interactions and Pathogenesis19
- Ch. 11 - Innate Immunity24
- Ch. 12 - Adaptive Immunity22
- Ch. 13 - Immune System Disorders15
- Ch. 14 - Biomedical Applications: Vaccines, Diagnostics, Therapeutics, and Molecular Method14
- Ch. 15 - Antimicrobial Drugs18
- Ch. 16 - Respiratory System Infections16
- Ch. 17 - Skin and Eye Infections19
- Ch. 18 - Nervous System Infections12
- Ch. 19 - Digestive System Infections20
- Ch. 20 - Urinary and Reproductive System Infections10
- Ch. 21 - Cardiovascular and Lymphatic Infections15
Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619Non è quello che usi tu?Cambia libro di testo
Capitolo 3, Problema 7
The patient has a viral titer of 200 on day four after infection, 30 at 4 weeks after infection, 600 at 8 months after infection, and 23 after 1 year of infection. This is likely a(n) _______________ infection.
Guida verificata passo dopo passo1
Step 1: Understand the meaning of viral titer values over time. Viral titer measures the concentration of virus particles in a sample, indicating the level of active infection at different time points.
Step 2: Analyze the pattern of viral titers given: 200 on day 4, 30 at 4 weeks, 600 at 8 months, and 23 at 1 year. Notice the initial decrease, then a significant increase, followed by another decrease.
Step 3: Recall the types of viral infections: acute (rapid onset and clearance), latent (virus remains dormant with possible reactivation), and chronic (persistent presence of virus at varying levels).
Step 4: Compare the pattern to these infection types. The increase in viral titer at 8 months after a decrease suggests reactivation of the virus, which is characteristic of a latent infection.
Step 5: Conclude that the infection is likely a latent infection, where the virus remains in the host and can reactivate after a period of dormancy.
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Viral Titer and Its Significance
Viral titer measures the concentration of virus particles in a sample, indicating the level of viral replication or presence in the host. Changes in viral titer over time help assess infection dynamics, such as acute, chronic, or latent infections.
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Persistent Viral Infections
Types of Viral Infections
Viral infections can be acute (rapid onset and resolution), chronic (persistent with ongoing replication), or latent (virus remains dormant with occasional reactivation). Understanding these types helps interpret fluctuating viral titers in patients.
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05:12Persistent Viral Infections
Interpreting Viral Titer Fluctuations Over Time
An initial rise, decline, and later increase in viral titer suggests viral reactivation or persistence rather than clearance. This pattern is typical of latent infections with periodic reactivation, distinguishing them from purely acute or chronic infections.
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