Quiz 6

Question 1

Which of the following viral pathogens are etiologic (causative) agents of mild upper respiratory tract disease (“common cold”)?

Answer 1

The human coronaviruses 229E, OC43 and NL63, rhinovirus, adenovirus, and parainfluenza virus type 4.

HARP

Question 2

Which of the following viral pathogens are etiologic (causative) agents of lower respiratory tract disease in infants?

Answer 2

RSV, Parainfluenzavirus types 1-3, Adenovirus type 14, and Human metapneumovirus, Influenza A virus

HARP

Question 3

Which of the following clinical signs and symptoms are characteristic of influenza?

Answer 3

the combination of fever/chills with a non-productive cough generally is considered characteristic of influenza.

Question 4

Which of the following classes of pathogens cause typical pneumonia?

Answer 4

Typical pneumonia, which generally affects the very young, and the elderly, is caused by specific localized bacterial infections.

Question 5

Which of the following diseases is caused by systemic intoxication following a localized bacterial infection of the oropharynx?

Answer 5

scarlet fever, diphtheria, and whooping cough.

Question 6

Which of the following diseases may be caused by localized infection with Neisseria meningitidis?

Answer 6

Localized infection with N. meningitidis can cause meningococcal meningitis, pneumonia, endotoxic shock, sudden death.

Question 7

Which of the following bacterial pathogens is/are a common cause of otitis media and sinusitis?

Answer 7

Otitis media and sinusitis are commonly caused by S. pneumoniae and non-encapsulated strains of H. influenzae

Question 8

Among the following diseases, caused by pathogens that enter via the respiratory tract, which include a rash as part of their clinical presentation?

Answer 8

scarlet fever (Streptococcus pyogenes), measles virus, rubella virus, varicella-zoster virus, monkeypox, smallpox

M^2S^2VR

Question 9

Which of the following pathogens, when transmitted by the respiratory-aerosol route, can be acquired directly from animals?

Answer 9

Chlamydophila psittaci, influenza A virus serotype H5N1, H1N1, hantavirus, monkeypox

Question 10

Which of the following organisms is the etiologic (causative) agent of scarlet fever?

Answer 10

S. PYOGENES

Pyrogenic exotoxin (Spe) producing strains of S. pyogenes cause scarlet fever.

Question 11

Which of the following statements is/are true of active tuberculosis?

Answer 11

evident by the presence of acid-fast bacteria (AFB) in their sputum.
Isolation orders are issued routinely by public health authorities to restrict contact between patients with active TB and the general public.

Question 12

Which of the following humoral and/or cellular effectors of the adaptive immune system is responsible for the diagnostic rash of measles?

Answer 12

TH1 cells that can recognize measles virus antigens will be present in the body. Those TH1 cells will recognize their antigen on the macrophages and will secrete cytokines that cause a local inflammatory response.

Question 13

Which of the following vaccines are intended to protect against disease caused by respiratory tract pathogens?

Answer 13

MCV4, 
BCG 
Varicella-zoster,
TIV
DTaP (diphtheria-tetanus-acellular pertussis),

Question 14

Among the following pathogens that enter via the respiratory tract and then disseminate, which has a human reservoir?

Answer 14

H. influenzae, measles, mumps, rubella, varicella-zoster, pneumococcal and meningococcal meningitis.

Question 15

Which of the following are bacterial pathogens that can cause pharyngitis?

Answer 15

non-encapsuled strains of S. pyogenes (Group A strep).

Question 16

Which of the following pathogens that enter via the respiratory tract are common causes of bacterial meningitis?

Answer 16

S. pneumoniae and H. influenzae, together with Neisseria meningitidis, are common causes of bacterial meningitis.

Question 17

Which of the following mechanisms can lead to disease after entry of a sexually-transmitted pathogen into the GI tract?

Answer 17

Cause disease after disseminating via the blood circulation as well as localized infection.

Question 18

Which of the following sexually-transmitted pathogens causes asymptomatic infections more frequently in men than in women?

Answer 18

trichomoniasis vaginalis is more common among men than among women.

Question 19

Which of the following sexually-transmitted pathogens can also be transmitted vertically?

Answer 19

Treponema pallidum, chlamydia trachomatis, HIV, and herpes simplex virus.

Question 20

Against which of the following blood-borne pathogens are protective vaccines currently available?

Answer 20

infection with Hep B virus can be prevented by immunization with the Hep B vaccine

Question 21

Which of the following vaccines are intended to protect against disease caused by sexually-transmitted pathogens?

Answer 21

HPV and HepB vaccines

Question 22

Which of the following diseases may be caused by localized infection with Neisseria gonorrhoeae

Answer 22

urethritis, cervicitis, and pelvic inflammatory disease. Can also cause pharyngitis if it is inoculated into the oropharynx.

Question 23

Which of the following bacteria that cause localized of the genitourinary tract are found commonly in the U.S?

Answer 23

Chlamydia trachomatis or N. gonorrhoeae.

Question 24

Among the following diseases that result from sexually-transmitted infection, which include genital ulcers among their clinical signs and symptoms?

Answer 24

Both primary syphilis and granuloma inguinale include genital ulcers. Lymphogranuloma venereum, human papillomavirus, and herpes simplex virus.

Question 25

Which of the following classes of antibiotics would be expected to have activity against chlamydiae?

Answer 25

antibiotics that interfere with bacterial protein synthesis, or bacterial nucleic acid synthesis.