In a patient with infective endocarditis, which of the following locations is the most likely location of a mycotic (infectious) aneurysm?
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This infection can lead to the formation of vegetations, which are clumps of bacteria, blood cells, and fibrin. Show more…
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Case 3 (Systemic Infections) This 39-year-old injection drug user (actively using cocaine on the date of admission) was admitted with cellulitis of the right arm after experiencing fevers for several weeks. He had been treated with outpatient antibiotics without relief of either associated chills or dizziness. Two sets of blood cultures were obtained on admission. A transthoracic echocardiogram demonstrated a 1-cm vegetation on the ventral surface of the aortic valve. The patient left the hospital against medical advice but was readmitted 2 days later for antimicrobial therapy. Past medical history was notable for multiple hospital admissions for both cellulitis and abscesses primarily involving the patient's arm. He had had multiple drug rehabilitation treatment attempts without success. Physical examination demonstrated a thin, unkempt man in no acute distress with multiple "needle track" marks on both his upper and lower extremities. No splinter hemorrhages or signs of embolic phenomena were noted on the extremities. Cardiac exam was notable for a grade II/VI systolic murmur best heard at the left sternal border. The spleen tip was palpable. The right arm had a 10-by-6-cm excoriated area with surrounding induration. Gram stain of an organism detected in both sets of the blood cultures obtained at admission is shown in Fig. 54.1. Growth of the organism on a blood agar plate is shown in Fig. 54.2. The organism grew in broth containing 6.5% NaCl, hydrolyzed esculin in the presence of bile (i.e., was bile esculin positive), and was catalase negative. Figure 54.1 Figure 54.2 1. What type of infection did this patient have? 2. What organisms frequently cause this type of infection in injection drug users? What organism was causing his infection? What new laboratory technique has resulted in a better understanding of the etiologies of the type of infection this patient had?
Adi S.
Case Study 1 A 32-year-old male arrives in the emergency room with a temperature of 39.1
Sri K.
Rank the following infections by where they occur within the cardiovascular system: Infections (5 items) (Drag and drop into the appropriate area) Point of Occurrence Center of heart Atherosclerosis Septicemia Pericarditis Endocarditis Myocarditis
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