The aetiology of this condition was [Select] with gram positive cocci via [Select] injection. The [Select] involves the bacteria being of [Select] virulence allowing them to colonise the heart valves and multiply. This creates [Select], parts of these can break off forming [Select] emboli, traveling through the blood vessels and lodging in small vessels under the fingernails forming splinter haemo Question 5 Case Study 2 A 65 year old male has been diagnosed as having a large aneurysm in his abdominal aorta. He is 1. subcutaneous intravenous sequelae pathophysiology infection commensal low pathogenesis moderate septic vegetations colonies fat blood high
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- The patient has a high fever (39.1°C), chest pain, breathing difficulties, palpable spleen tip, splinter hemorrhages, needle tracks, and a heart murmur. Show more…
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Case Study 1 A 32-year-old male arrives in the emergency room with a temperature of 39.1
Sri K.
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: In the past, a family has had a son die at the age of 2 weeks because of overwhelming bacterial infections. They now have a newborn daughter that has developed recurrent infections. The child’s pediatrician ordered the following tests: Laboratory Tests and Data Hemoglobin and hematocrit: within normal range Total WBC count: 62.0 x 10^9/L Absolute leukocyte counts: above normal for each leukocyte type Leukocyte differential: neutrophils 74%, lymphocytes 24%, eosinophils 2% Flow cell cytometry: T Lymphs – Normal (2:1) proportion of CD4+ and CD8+ cells B lymphocytes – elevated Natural killer cells – elevated CD18+ lymphocytes – absent Serum Ig fractions: within reference ranges Treatment The infant was given busulfan, cyclophosphamide, and antithymocyte serum for 10 days. She received mature T lymphocyte-depleted bone marrow transplanted from her mother. This was followed by a short period of immune-suppressive therapy. She recovered from the procedures and did well clinically. Answer the following questions in the space below: a. Which laboratory test is significant in diagnosing this patient? b. What abnormality results from this type of condition? c. What does the family history suggest? d. What is the diagnosis for this patient? Part B Be able to visually identify the following organisms by biochemical or serologic tests: a. Staphylococcus aureus b. Staphylococcus saprophyticus c. Staphylococcus epidermidis d. Streptococcus pyogenes e. Streptococcus agalactiae f. Streptococcus pneumoniae g. Enterococcus faecalis
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