CASE STUDY 15.6 A 52-year-old woman presents with a localized swelling and purulent abscess in her right hand and enlarged lymph nodes in her axial region (under the armpit). She sustained a small puncture wound while replanting rose bushes 1 week earlier. She has repeatedly cleaned and dressed the wound with antibiotic treatment, with no success. The physician collects an aspirate from the abscess. Gram stain reveals gram-positive cocci in clusters Laboratory data follow Catalase: Positive Coagulase: Latex positive Multiple Choice Questions From the patient's history and laboratory results, which organism is the most likely cause of the infection. Micrococcus luteus Staphylococcus aureus Staphylococcus epidermidis Sporothrixschenckii ANS: b. Staphylococcus aureus What other clinical condition could arise from this injury if treatment were not initiated? No concerns; infections are self-limiting. Patient may develop a bacteremia, resulting in a more serious infection. Patient may develop necrotizing fasciitis, resulting in loss of a limb. Patient will become colonized and will have recurrent infections. ANS: b. Patient may develop a bacteremia, resulting in a more serious infection. Critical Thinking Discussion Question: What culture media would be appropriate for culture and identification of the suspected isolate? Why? and What antibiotics would be used to treat this infection? Could there be any treatment problems with this isolate?

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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CASE STUDY 15.6

A 52-year-old woman presents with a localized swelling and purulent abscess in her right hand and enlarged lymph nodes in her axial region (under the armpit). She sustained a small puncture wound while replanting rose bushes 1 week earlier. She has repeatedly cleaned and dressed the wound with antibiotic treatment, with no success. The physician collects an aspirate from the abscess. Gram stain reveals gram-positive cocci in clusters Laboratory data follow

Catalase: Positive

Coagulase: Latex positive

Multiple Choice Questions

From the patient's history and laboratory results, which organism is the most likely cause of the infection.
Micrococcus luteus
Staphylococcus aureus
Staphylococcus epidermidis
Sporothrixschenckii

ANS: b. Staphylococcus aureus

What other clinical condition could arise from this injury if treatment were not initiated?
No concerns; infections are self-limiting.
Patient may develop a bacteremia, resulting in a more serious infection.
Patient may develop necrotizing fasciitis, resulting in loss of a limb.
Patient will become colonized and will have recurrent infections.

ANS: b. Patient may develop a bacteremia, resulting in a more serious infection.

Critical Thinking Discussion Question:

What culture media would be appropriate for culture and identification of the suspected isolate? Why? and What antibiotics would be used to treat this infection? Could there be any treatment problems with this isolate?

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