Chapter 24/ Introduction to viruses that infect humans: The DNA Viruses Flashcards
What is true about Poxviruses?
- Produce eruptive skin pustules (pocks or pox) that leave scars
- Largest and most complex animal viruses
- Have the largest genome of all viruses
- Multiply in cytoplasm in factory areas
- All the above
- All the above
When a herpes infection causes eye infection resulting in Inflammation, sharp pain, conjuntivitis, and gritty feeling in the eye this is known as…
Herpetic keratitis
(ocular herpes)
Herpetic whitlows are ____ infections of the _____
1. pox, oral cavity
2. CMV,lymph nodes
3. EBV,skin
4. herpes,fingers
- herpes,fingers
fever blisters and genital infections are caused by
- Herpes simplex 1 and 2 (HSV)
- Herpesvirus 3
- Herpesvirus 4
- Herpesvirus 5
- Herpes simplex 1 and 2 (HSV)
Most RNA viruses multiply in and are released from the cytoplasm.
TRUE or FALSE
TRUE
Which of the following viruses causes chronic persistent infection?
1. hepatitis B
2. smallpox
3. parvovirus
4. varicella - zoster virus
- hepatitis B
Recurrent infection of Herpes simplex can be triggered by
1. UV radiation
2. gas
3. stress
4. 5 and 1
5. alcohol use and drug use
6. 1 and 3
- 1 and 3
______ is an effective treatment for herpes simplex lesions
1. Amantadine
2. Interferon
3. Acyclovir
4. Cortisone
- Acyclovir
In general, zoonotic viral diseases are _____ in humans
- mild and asymptomatic
- self -limited
- severe and systemic
- not contagious
- severe and systemic
Viruses that remain as a separate stable genetic element are called
episomes
fever blisters or cold sores are referred to as____ ______
Herpes labialis
Viruses that last longer term and can last anywhere from years to entire life is called
Persistant infections
HSV-1 enters _____nerve
5th cranial
Which virus is used in smallpox vaccination?
1. variola
2. vaccinia
3. cowpox
4. varicella
- vaccinia
herpes zoster is also known as
shingles
Molluscipoxvirus causes what common skin disease?
molluscum contagiosum
Virus is detectable in tissue samples and is still multiplying at a slow rate but symptoms of infection are usually mild or absent. This is labeled as a ____ infection
Chronic
When Reactivation of the chicken pox occurs, it is called ____ ____
(shingle) orHerpes zoster
_____ infections result when the virus enters a dormant phase inside host cells and becomes inactive after a lytic infection.
Latent
All RNA viruses are single-stranded except for dsRNA ______
reoviruses
Adenoviruses are the agents of
1. hemorrhagic cystitis
2. keratoconjuntivitis
3. common cold
4. all of these
- all of these
implicated in Kaposi sarcoma
1. Herpesvirus 8
2. Herpesvirus 3
3. Herpesvirus 4
4. Herpesvirus 6 and 7
- Herpesvirus 8
Neonatal herpes simplex is usually acquired through
1. contaminated mothers hands
2. other babies in the newborn nursery
3. crossing the placenta
4. an infected birth canal
- an infected birth canal
Most DNA viruses are budded off the nucleus
TRUE or FALSE
TRUE
HSV-2 enters ______ spinal nerve trunk ganglia
lumbosacral
Which of the following viruses can be oncogenic in humans
1. papillomavirus
2. Epstein-Barr virus
3. adenovirus
4. both a and b
- both a and b
Epstein-Barr virus (EBV), associated
with infection of the lymphoid tissue
- Herpes simplex 1 and 2 (HSV)
- Herpesvirus 3
- Herpesvirus 4
- Herpesvirus 5
- Herpesvirus 4
Which of the following is NOT caused by a poxvirus?
A. Molluscum contagiosum
B. Smallpox
C. Cowpox
D. Chickenpox
D. Chickenpox
Small pox can be highly virulent, cause toxemia, shock, and intravascular coagulation. This would be called ____ _____
Variola major
What herpesvirus is most commonly associated with a dangerous fetal infection
1. herpes simplex
2. herpes zoster
3. EBV
4. CMV
- CMV
Varicella and zoster is caused by
1. the same virus
2. two different strains of VZV
3. herpes simplex and herpes zoster
4. CMV and VZV
- the same virus
cytomegalovirus (CMV), infects the
salivary glands and other viscera
- Herpes simplex 1 and 2 (HSV)
- Herpesvirus 3
- Herpesvirus 4
- Herpesvirus 5
- Herpesvirus 5
Herpes simplex 1 usually causes _____, and herpes simplex2 usually causes _____
A. cold sores, genital herpes
B. fever blisters, cold sores
C. canker sores, fever blisters
D. shingles, stomatitis
A. cold sores, genital herpes
A syndrome characterized by fever and lymphocytosis, which somewhat similar to Epstein - Barr virus is called
Cytomegalovirus mononucleosis
All DNA viruses are double-stranded except for
______which have ssDNA
parvoviruses
single stranded
A common sign of hepatitis is
1. liver cancer
2. jaundice
3. anemia
4. bloodshot eyes
- jaundice
Parvoviruses are unique because they contain
1. a double-stranded RNA genome
2. reverse transciptase
3. a single - stranded DNA genome
4. an envelope without spikes
- a single - stranded DNA genome
Animal viruses are categorized according to what 3 factors?
-nucleic acid (DNA/RNA)
-capsid
- presence or absence of envelope
Benign epithelial growths on the skin of fingers are called
1. polyomas
2. verrucas
3. whitlows
4. pox
- verrucas
Molluscipoxvirus is transmitted by ____ ____ and ____
direct contact and fomites
A virus associated with chronic liver infection and cancer is
1. hepatitis C
2. hepatitis B
3. hepatitis A
4. both a and b
- both a and b
Two types of persistence viral infections are….
Chronic viral infections and latent viral infections
varicella-zoster virus (VZV), chickenpox
and shingles
1. Herpes simplex 1 and 2 (HSV)
2. Herpesvirus 3
3. Herpesvirus 4
4. Herpesvirus 5
- Herpesvirus 3
