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Chapter 12: Aerobic Non–Spore-Forming Gram-Positive Bacilli: Corynebacterium, Listeria, Erysipelothrix, Nocardia, and Related Pathogens

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    AMA Citation
    Aerobic Non–Spore-Forming Gram-Positive Bacilli: Corynebacterium, Listeria, Erysipelothrix, Nocardia, and Related Pathogens. In: Carroll KC, Hobden JA, Miller S, Morse SA, Mietzner TA, Detrick B, Mitchell TG, McKerrow JH, Sakanari JA. Carroll K.C., Hobden J.A., Miller S, Morse S.A., Mietzner T.A., Detrick B, Mitchell T.G., McKerrow J.H., Sakanari J.A. Eds. Karen C. Carroll, et al.eds. Jawetz, Melnick, & Adelberg’s Medical Microbiology, 27e New York, NY: McGraw-Hill; . http://accessmedicine.mhmedical.com/content.aspx?bookid=1553&sectionid=94126730. Accessed June 03, 2020.
    MLA Citation
    . "Aerobic Non–Spore-Forming Gram-Positive Bacilli: Corynebacterium, Listeria, Erysipelothrix, Nocardia, and Related Pathogens." Jawetz, Melnick, & Adelberg’s Medical Microbiology, 27e Carroll KC, Hobden JA, Miller S, Morse SA, Mietzner TA, Detrick B, Mitchell TG, McKerrow JH, Sakanari JA. Carroll K.C., Hobden J.A., Miller S, Morse S.A., Mietzner T.A., Detrick B, Mitchell T.G., McKerrow J.H., Sakanari J.A. Eds. Karen C. Carroll, et al. New York, NY: McGraw-Hill, , http://accessmedicine.mhmedical.com/content.aspx?bookid=1553&sectionid=94126730.

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Chapter 12: Aerobic Non–Spore-Forming Gram-Positive Bacilli: Corynebacterium, Listeria, Erysipelothrix, Nocardia, and Related Pathogens

Three months ago, a 53-year-old woman had surgery and chemotherapy for breast cancer. Four weeks ago, she developed a cough occasionally productive of purulent sputum. About 2 weeks ago, she noted a slight but progressive weakness of her left arm and leg. On chest examination, rales were heard over the left upper back when the patient breathed deeply. Neurologic examination confirmed weakness of the left arm and leg. Chest radiography showed a left upper lobe infiltrate. Contrast-enhanced computed tomography showed two lesions in the right hemisphere. Gram stain of a purulent sputum specimen showed branching gram-positive rods that were partially acid fast. Which of the following organisms is the cause of this patient’s current illness?

(A) Actinomyces israelii

(B) Corynebacterium pseudodiphtheriticum

(C) Aspergillus fumigatus

(D) Nocardia farcinica

(E) Erysipelothrix rhusiopathiae

Three months ago, a 53-year-old woman had surgery and chemotherapy for breast cancer. Four weeks ago, she developed a cough occasionally productive of purulent sputum. About 2 weeks ago, she noted a slight but progressive weakness of her left arm and leg. On chest examination, rales were heard over the left upper back when the patient breathed deeply. Neurologic examination confirmed weakness of the left arm and leg. Chest radiography showed a left upper lobe infiltrate. Contrast-enhanced computed tomography showed two lesions in the right hemisphere. Gram stain of a purulent sputum specimen showed branching gram-positive rods that were partially acid fast.

The drug of choice to treat this patient’s infection is

(A) Penicillin G

(B) Trimethoprim–sulfamethoxazole

(C) Gentamicin

(D) Amphotericin B

(E) A third-generation cephalosporin

It is particularly difficult to differentiate Erysipelothrix rhusiopathiae from

(A) Corynebacterium diphtheriae

(B) Bacillus cereus

(C) Actinomyces israelii

(D) Nocardia asteroides

(E) Lactobacillus species

Movement of Listeria monocytogenes inside of host cells is caused by

(A) Inducing host cell actin polymerization

(B) The formation of pili (fimbriae) on the listeriae surface

(C) Pseudopod formation

(D) The motion of ...

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