Staphylococcus Aureus Spectrum of Disease
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Questions and Answers

What is the most common cause of acute endocarditis in IV drug users?

  • Native valve (mitral valve)
  • Prosthetic valve
  • Pacemaker valve
  • Native valve (tricuspid valve) (correct)

    • Which of the following is a complication of pneumococcal pneumonia?

  • Empyema (correct)
  • Hemothorax
  • Pleural effusion
  • Pneumothorax

    • What is the characteristic feature of Brodie abscess?

  • Sequestered focus of osteomyelitis in the epiphyseal area
  • Sequestered focus of osteomyelitis in the periosteal area
  • Sequestered focus of osteomyelitis in the metaphyseal area (correct)
  • Sequestered focus of osteomyelitis in the diaphyseal area

    • Which of the following is NOT a skin infection caused by Staphylococcus aureus?

    <p>Ringworm</p> Signup and view all the answers

    What is the name of the syndrome caused by Staphylococcus aureus, characterized by desquamation of the skin?

    <p>Scalded Skin Syndrome</p> Signup and view all the answers

    What is the name of the food commonly associated with Staphylococcal gastroenteritis?

    <p>Mayonnaise</p> Signup and view all the answers

    What is the primary source of Staphylococcus aureus toxin that causes acute onset of vomiting and diarrhea?

    <p>Salad made with mayonnaise</p> Signup and view all the answers

    What is the characteristic skin finding in Scalded Skin Syndrome (Ritter disease)?

    <p>Separation of epidermis at stratum granulosum</p> Signup and view all the answers

    What is the primary toxin responsible for Toxic Shock Syndrome?

    <p>TSST-1</p> Signup and view all the answers

    What is the typical scenario associated with Toxic Shock Syndrome?

    <p>Tampon-using menstruating women</p> Signup and view all the answers

    What is the characteristic oral finding in Toxic Shock Syndrome?

    <p>Strawberry tongue</p> Signup and view all the answers

    What is the most likely causative agent of the patient's symptoms in the given scenario?

    <p>Staphylococcus Aureus</p> Signup and view all the answers

    What is the characteristic of Staphylococcus saprophyticus colonies on blood agar?

    <p>Whitish</p> Signup and view all the answers

    What is the term for the pain in urination experienced by patients with Staphylococcus saprophyticus infection?

    <p>Dysuria</p> Signup and view all the answers

    What is the most common cause of UTIs in sexually active women, second only to E. coli?

    <p>Staphylococcus saprophyticus</p> Signup and view all the answers

    What is the antibiotic of choice for treating Staphylococcus saprophyticus infection?

    <p>TMP-SMX</p> Signup and view all the answers

    What is the term for the presence of bacteria in urine?

    <p>Bacteriuria</p> Signup and view all the answers

    Why is removal of the prosthetic device necessary in the treatment of Staphylococcus epidermidis infection?

    <p>Because it is a device-related infection</p> Signup and view all the answers

    What is the DOC for Methicillin-resistant Staphylococcus aureus (MRSA)?

    <p>Vancomycin</p> Signup and view all the answers

    What is unique about Staphylococcus epidermidis colonies on blood agar?

    <p>They are whitish and non-hemolytic</p> Signup and view all the answers

    What is the primary habitat of Staphylococcus epidermidis?

    <p>Normal skin flora and mucous membranes of humans</p> Signup and view all the answers

    What is the role of biofilm formation in Staphylococcus epidermidis?

    <p>Colonization, immune evasion, and antibiotic resistance</p> Signup and view all the answers

    What is the most common cause of prosthetic valve endocarditis?

    <p>Staphylococcus epidermidis</p> Signup and view all the answers

    What does a titer of over 250 Todd units indicate?

    <p>Recent or repeated infection</p> Signup and view all the answers

    What is the function of poly-γ-glutamic acid (PGA) and poly-N-acetylglucosamine (PNAG)/PIA in Staphylococcus epidermidis?

    <p>Protect from innate host defense mechanisms</p> Signup and view all the answers

    What is the complication of impetigo contagiosa?

    <p>Poststreptococcal glomerulonephritis</p> Signup and view all the answers

    What is the role of hyaluronidase in skin and soft tissue infections?

    <p>It facilitates the spread of infection</p> Signup and view all the answers

    What is the most common bacterial cause of sore throat?

    <p>Streptococcus pyogenes</p> Signup and view all the answers

    What is Fournier's gangrene?

    <p>A form of necrotizing fasciitis involving the male genital area and perineum</p> Signup and view all the answers

    What is the effect of antistreptokinase on streptokinase?

    <p>It decreases the efficiency of streptokinase in managing MI</p> Signup and view all the answers

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