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Microbiology- Chapt 19 HW

Terms in this set (20)

Both compete with pathogens for resources and space and microbial antagonism are correct.
What is the function of normal biota of the respiratory tract?
All of the choices are correct.
Superantigens ________.
Symptoms are very similar to the common cold.
Which of the following is not true of influenza?
All species are human pathogens.
Which is not correct about Mycobacterium species?
antimicrobials cannot treat and cure tuberculosis
All of the following pertain to tuberculosis except ________.
All of the choices are correct.
Streptococcus pneumoniae is ________.
antigenic drift, antigenic shift
Influenza virus can exhibit constant mutation of viral glycoproteins called ________, or _________, a more serious phenomenon caused by the exchange of a viral gene with that of another influenza virus strain.
False
People who have received the BCG immunization will generally have a negative tuberculin skin test.
Complement activation - third line of defense
Which of the following pairs of defense mechanisms is mismatched?
False
Antigenic drift differs from antigenic shift in that antigenic drift reflects the exchange of RNA strands between different virus strains within a common host cell, whereas antigenic shift is the gradual mutation over time of the glycoproteins on the viral envelope that bind to immune cells.
False
Extensively drug-resistant tuberculosis, while harder to treat because some antibiotics are ineffective, has a similar prognosis and recovery rate compared to nonresistant tuberculosis.
Treachea
Which of the following is not part of the upper respiratory tract?
IgA
Which antibody is concentrated in the respiratory tract?
None of the choices are correct.
Normal biota of the lower respiratory tract include ________.
endogenous
The most common mode of transmission for sinusitis is ________.
an immunological cross-reaction in which anti-streptococcal antibodies target the heart
Rheumatic fever is caused by ________.
Forms spores
Which of the following is not true of Streptococcus pyogenes?
the catarrhal stage has persistent, hacking coughs with "whoops"
Pertussis has the following characteristics except ________.
All of the choices are correct.
Tuberculin skin testing ________.
necrotic caseous
When the centers of tubercles break down into _____ lesions, they gradually heal by calcification that replaces normal lung tissue.
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