Medical Laboratory Science Review Harr. 7.10:
Microbiology: Virology Questions with Correct
Answers
Classification of viruses is made by:
A. Complement fixation serology
B. Electron microscopy
C. Nucleic acid composition
D. Cellular inclusion bodies Correct Answer-C True viruses have
nucleic acid that is either RNA or DNA, and this serves as the basis for
initial classification. Members of these classes are further divided into
groups that cause human disease based upon the mode of transmission,
tissues invaded, diseases produced, and antigenic characteristics
Which virus is the most common etiological agent of viral respiratory
diseases in infants and children?
A. Respiratory syncytial virus (RSV)
B. Measles virus
C. Coxsackie A virus
D. Coxsackie B virus Correct Answer-A RSV is the cause of croup,
bronchitis, bronchiolitis, and interstitial pneumonia. Children under 1
year old who are hospitalized are the most susceptible group
The most common viral syndrome of pericarditis, myocarditis, and
pleurodynia (pain upon breathing) is caused by:
A. Herpes simplex virus
,B. Respiratory syncytial virus
C. Epstein-Barr virus
D. Coxsackie B virus Correct Answer-D Coxsackie A virus, Coxsackie
B virus, and the echoviruses are most commonly implicated in
myocarditis and other syndromes, including acute cerebellar ataxia and
hepatitis. Like poliovirus, infections are more common in the summer
and fall and gain entry through the gastrointestinal tract.
Which of the following viruses is implicated along with Epstein-Barr
virus as a cause of infectious mononucleosis?
A. Cytomegalovirus (CMV)
B. Coxsackie A virus
C. Coxsackie B virus
D. Hepatitis B virus Correct Answer-A CMV infection in a previously
healthy individual causes a self-limited mononucleosis syndrome. CMV
is an opportunistic pathogen that may produce lifelong infections and
can cause a variety of diseases, including congenital and neonatal
infection, hepatitis, pneumonia, and disseminated infection in
immunocompromised patients
The most common causes of viral pneumonia in adults are:
A. Influenza and adenovirus
B. Hepatitis A and B viruses
C. Coxsackie A and B viruses
D. Herpes simplex and CMV Correct Answer-A Influenza and
adenoviruses are the main causes of respiratory infections, including the
, common cold, tracheobronchitis, and pneumonia. Adenoviruses also
cause conjunctivitis, keratitis, cystitis, and gastroenteritis.
Which virus belonging to the Reoviridae group causes gastroenteritis in
infants and young children but an asymptomatic infection in adults?
A. Coxsackie B virus
B. Rotavirus
C. Respiratory syncytial virus
D. Rhabdovirus Correct Answer-B Rotaviruses have been implicated in
both nosocomial infections and epidemic gastroenteritis. Children 3-24
months old are most commonly affected. Diarrhea begins after an
incubation period of 3 days, lasts for 2-10 days, and is associated with
vomiting and dehydration. In immunosuppressed children, rotavirus
causes a chronic infection
A very small, single-stranded DNA virus that causes a febrile illness
with a rash and is called the fifth childhood disease after rubeola,
rubella, varicella, and roseola is:
A. Rotavirus
B. Adenovirus type 40
C. Coxsackie A virus
D. Parvovirus B19 Correct Answer-D Parvovirus causes a fever and
characteristic "slapped cheek" rash in young children. Adults are usually
immune, but immunocompromised persons may exhibit an arthritis or
anemia (the virus infects immature RBCs in the bone marrow)
Hepatitis B virus can be transmitted by:
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