Rickettsial Dz’s Of Humans; Typical Bacterial Pneumonias
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- 1.A 36-year-old man in Texas with fever, headache, myalgia, and tick exposure had a serological test that showed antibodies against Ehrlichia chafeeensis. What is a feature of Ehrlichia that differs from other Rickettsia?
- A.
Invasion of mononuclear leukocytes
- B.
Invasion of vascular endothelium
- C.
Cell wall that contains peptidoglycan
- D.
Cell wall that contains lipopolysaccharide
- E.
Invasion of polymorphonuclear leukocytes
- 2.An outbreak of murine (endemic) typhus occurred in the US in 2008. Affected patients experienced fever, headache, chills, vomiting, nausea, myalgia, and rash. Of the 53 cases, 62% had a four-fold rise in antibody titer to Rickettsia typhi antigens. What is the vector associated with transmission of this organism?
- A.
Mosquito
- B.
Body louse
- C.
Tick
- D.
Flea
- E.
Sand fly
- 3.How are the obligate intracellular pathogens of the genera Rickettsia, Ehrlichia, and Anaplasma transmitted by vectors?
- A.
All are transmitted by ticks except for Rickettsia typhi, which is transmitted by lice
- B.
Rocky Mountain spotted fever is transmitted mainly by Amblyoma ticks found in Texas
- C.
Anaplasma is transmitted mainly by Ixodes ticks, which can be co-infected with Babesia or agent of Lyme disease
- D.
Epidemic typhus is transmitted mainly by rodent fleas
- 4.A 50 year old man diagnosed as having the features of a lobar Pneumonia. Which one of the following symptoms is most indicative of pneumonia?
- A.
He had chest pain, cough and difficulty with lying flat in bed at nights
- B.
He had fever, hoarseness, a post-nasal drip and a cough
- C.
There was fever, left chest pain on breathing, cough, and yellow sputum
- D.
He had cough, acute shortness of breath, hemoptysis and left calf pain
- E.
On walking that morning he had a wheezy chest, cough and shortness of breath
- 5.A 62-year-old male presented with the sudden onset of shaking chills, cough productive of thick yellow sputum, and dyspnea. The x-ray showed lobar consolidation of the right lower lobe. Sputum culture grew Streptococcus pneumoniae. Which clinical feature of this case of typical pneumonia best differentiates it from atypical pneumonia?
- A.
Sudden onset
- B.
Thick purulent sputum
- C.
Shaking chills
- D.
X-ray pattern
- E.
Culture result
- 6.An 86-year-old man was admitted to the hospital with a fever and chest x-ray evidence of consolidation and received antibiotics. Two weeks after his initial admission, he was re-admitted to the hospital with fever, a purulent cough, and dyspnea. What organism was likely to have been cultured from sputum during his second illness?
- A.
Streptococcus pneumonia
- B.
Haemophilus influenza
- C.
Staphylococcus epidermidis
- D.
Klebsiella pneumonia
- E.
Moraxella catarrhalis
- 7.A 23-year-old pregnant woman is admitted to hospital in severe respiratory distress following a week-long influenza-like illness for which she received symptomatic treatment only. A respiratory specimen taken in intensive care shows Gram-negative bacilli. What is the most likely causative agent?
- A.
Streptococcus pneumonia
- B.
Haemophilus influenzae
- C.
Staphylococcus aureus
- D.
Klebsiella pneumoniae
- E.
Moraxella catarrhalis
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