Micro20 Ch 24

Please choose the complications that can result from an infection with polyomavirus JC in cancer patients or others who are immunosuppressed.

A cerebral infection that results in gradual demyelinization

Epstein-Barr virus infections have been linked to which two specific cancers? A. Burkitt lymphoma B. Nasopharyngeal carcinoma C. Kaposi's sarcoma D. Acute myeloid leukemia

A, B

Select each of the options below that correspond to characteristics of adenoviruses. A. Non-enveloped double stranded DNA viruses B. Transmitted through respiratory aerosols and ocular secretions C. More common in the civilian population than in the military population D. Symptoms commonly include acute rhinitis, cough, sore throat, and enlarged cervical lymph nodes E. Prevalence of adenovirus infection is low, so a small percentage of the human population has been effected

A, B, D

Select all of the correct answers that indicate means by which herpes simplex infection can be diagnosed. A. The presence of small, painful vesicles on effected mucous membranes B. The presence of a macropapular rash on the face and neck C. Microscopic examination for the presence of multinucleate cells, giant cells, and intra-nuclear inclusion bodies D. Arthritic-like pain in joints E. Large atypical lympohcytes with lobulated nuclei

A, C

Select all of the correct answers in this question to test your understanding of the general characteristics of viruses. A.Viruses are composed of DNA or RNA molecules surrounded by a protein coat. B. Viruses are living cells that posses conventional cell membranes. C. The nucleic acids of certain animal viruses are composed of DNA whereas others are composed of RNA. D. Lytic viral infection often results in destruction of the host cell. E. Viruses are capable of carrying out life processes independent of their host cells.

A, C, D

Select each of the options below that correspond to characteristics of parvoviruses. A. Possess single-stranded DNA as their form of nucleic acid B. Have an extremely small diameter and genome size C. Cause an acute, severe urinary condition in elderly men D. Several types are severe pathogens of non-human mammals, such as one causing feline distemper E. One member causes a common childhood skin rash

A,B, D, E

Select all of the correct answers to test your understanding of why vaccination against smallpox has been curtailed. A. Smallpox vaccination was curtailed because it was an ineffective vaccine B. Smallpox vaccination was curtailed because there have been no human smallpox cases since 1977. C. Smallpox vaccination was curtailed because of the threat of progressive vaccinia, a potential side effect. D. Smallpox vaccination was curtailed because it was a difficult vaccine to administer and thus highly expensive.

B, C

Select each of the options below that correspond to the human diseases or conditions caused by parvovirus B19. A. A renal condition of middle aged men with a high mortality rate B. A mild condition of children which often goes undetected, but can result in a red rash and low grade fever C. An infection in pregnant women which can cross the placenta doing great harm to the fetus (i.e. a teratogen) D. An infection of adults which can result in joint swelling and pain E. Infection causes a progressive neurological deterioration in infants under the age of two

B, C, D

Choose the human tissue most commonly targeted by herpes simplex viruses. A. Bone/cartilage B. Mucous membranes C. Muscle D. Intestinal lining E. Lymph nodes

B. Mucous membranes

Choose the answer below that includes the herpesvirus(es) that infect humans. A. Herpes simplex viruses 1 and 2 B. Varicella-zoster virus C. Cytomegalovirus D. Epstein-Barr virus E. All of these are herpesviruses.

E

The Zostavax vaccine is indicated for the prevention of shingles prior to the onset of an episode of chickenpox.

False

Non-enveloped RNA enterovirus transmitted by fecal-oral means in food and water and causes the mildest pathology of the three viruses

Hepatitis A virus

Enveloped DNA virus transmitted through blood and other body fluids with a relatively long incubation period and can cause chronic liver damage progressing to cirrhosis or liver cancer

Hepatitis B virus

Enveloped RNA flavivirus transmitted through blood and other body fluids that causes acute to chronic liver damage progressing to cirrhosis or liver cancer

Hepatitis C virus

Usually results in the formation of oral lesions; primary infection frequently occurs in infancy

Herpes Simplex Virus 1

Usually results in the formation of genital lesions; primary infection occurs most frequently between the ages of 14 and 29

Herpes Simplex Virus 2

Choose the set of characteristics below which best describe the unique structure of poxviruses.

Poxviruses are the largest and most complex of the animal viruses.

Certain human viral pathogens can be transmitted to humans from other animal species by vectors.

True

In the United States alone, human papillomaviruses result in 10,000 new cases of cervical cancer each year.

True

The conditions known as varicella and herpes zoster are caused by the same virus.

True

Please choose which set of circumstances would likely result in transmission of HBV from one individual to another to test your understanding of the known mechanism of HBV transmission.

Unprotected sexual intercourse with multiple partners

Please choose the answer that best fills in the blanks of this sentence in the correct order. Animal viruses are classified based upon the nature of their nucleic acids, the shape of their _________, and whether or not they possess a viral ________.

capsid; envelope

A "papilloma" is an epithelial growth commonly referred to as a ________.

wart