Viral Multiplication and Antiviral Agents

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What is the target of Nucleoside analogs in viral multiplication?

Viral particle release

Viral mRNA

Viral protein synthesis

Viral DNA and RNA polymerase (correct)

What is the primary disadvantage of chemoprophylaxis in preventing viral infections?

It is not widely available

It is a costly method

It is not effective against viral infections

It can also affect normal host cells (correct)

What type of vaccine is prepared by heat or chemical inactivation of whole virions?

Live virus vaccine

Virion subunit vaccine

Killed virus vaccine (correct)

Polypeptide vaccine

What is the function of interferon in preventing viral infections?

It activates immune cells to fight viral infections (B) Signup and view all the answers

What is the target of Indinavir and Siquinavir in viral multiplication?

Cleavage of precursor polypeptide (D) Signup and view all the answers

What is the advantage of using Virion subunit vaccine over killed virus vaccine?

It has fewer risks of adverse reactions (C) Signup and view all the answers

What is the outcome when there is no antigen that binds to the antibody in a hemagglutination reaction?

Hemolysis occurs (C) Signup and view all the answers

Which of the following is NOT a method for diagnosing viral diseases?

X-ray imaging (B) Signup and view all the answers

What is the purpose of adding enzyme-linked anti-HISG in the ELISA test?

To bind to the bound antibody (A) Signup and view all the answers

What is a challenge in treating viral diseases?

The virus is spread throughout the body by the time symptoms appear (C) Signup and view all the answers

What is the result of adding enzyme substrate in the ELISA test?

A color change is produced (C) Signup and view all the answers

Which of the following is a reason for the emergence of drug-resistant mutants in viral diseases?

Mutants of herpes virus resistant to Acyclovir have been recovered from patients (C) Signup and view all the answers

What is the primary consideration when selecting a specimen type for viral diagnosis?

The clinical and epidemiological considerations (B) Signup and view all the answers

When is it best to collect a specimen for viral diagnosis?

As early as possible, within the first 4 days of symptom onset (D) Signup and view all the answers

What type of material should be avoided when collecting a viral specimen?

Cotton swab with calcium alginate (D) Signup and view all the answers

Why is it recommended to use viral transport medium for most specimens?

It contains a protein stabilizer and antibiotics (C) Signup and view all the answers

What should be done if there is a delay in processing the specimen?

Hold the specimen at 4°C (B) Signup and view all the answers

What is the primary purpose of including antibiotics in viral transport medium?

To prevent contamination during transport (D) Signup and view all the answers