On physical examination, her temperature is 38.2☌. What is the genus and species of the organism?Ĭlinical history: A 33-year-old female dairy farmer develops a severe headache and neck stiffness. The coagulase test for the organism is positive. A throat culture grows normal oropharyngeal flora. What alpha-hemolytic organism is most likely to be isolated on the blood agar? The organism was Gram positive, catalase positive and coagulase negative. Blood culture shows non-hemolytic, small, white colonies. Jude’s prosthetic aortic valve and a fever of 38.6☌ (101.5☏). A patient with suspected infectious endocarditis has a St. Which of these organisms are normal flora of the throat and are associated with dental caries, brain abscesses, and endocarditis? The heart valve MOST OFTEN affected by infective endocarditis in IV drug abusers is the: The organism MOST OFTEN associated with infective endocarditis in IV drug abusers is: The organism MOST LIKELY to infect normal heart valves is: In this particular patient the MOST LIKELY causative organism was: Most cases that present with these findings are caused by: The myocardium shows slight focal fibrosis, and focal acute inflammatory infiltration in some sections. It is infiltrated with acute and chronic inflammatory cells, and shows a zone of necrosis and fibrosis in the central portion of the valve. The valve is greatly thickened and damaged. The section represents a portion of mitral valve, left atrium and left ventricle. Splinter hemorrhages and purpuric skin rashes were noted three weeks before death. Three months prior to death he began to have episodes of fever and chills accompanied by signs of worsening congestive heart failure. Community acquired atypical pneumonia can be caused by which of the following organisms?Ĭlinical History: A 67-year-old male had rheumatic heart disease for thirty years. These images depict pneumonia in the stage of: What is the MOST LIKELY diagnosis AND the likely causative agent? The alveolar septa are delicate and well preserved, but markedly congested. Many RBC's have been phagocytosed by the macrophages and are undergoing disintegration. The alveoli are distended and contain a large amount of inflammatory exudate, which consists of many polymorphonuclear leukocytes, a few RBC's, macrophages and strands of fibrin. He died suddenly shortly after admission. He had nausea, vomiting, dehydration, confusion and high fever. What is the MOST LIKELY organism?Ĭlinical History: A 45-year-old male became ill approximately 2 to 3 weeks ago following an alcoholic spree. The organism grown was non-hemolytic, catalase negative, and PYR positive. He presents with new onset of fever, chills, and confusion. An elderly wheelchair bound man had a history of recurrent urinary tract infections. It also showed beta-hemolysis on sheep blood agar (SBA) and was catalase negative. The throat culture obtained exhibited gram positive cocci in chains. What is the BEST diagnosis at the time of death? Larger arteries and veins are located at the interface between cortex and medulla. The inner medulla of the kidney contains only tubules and blood vessels. The vessels exhibit no narrowing or wall thickening. In the areas between the glomeruli, tubules and arterioles are seen. The interstitium demonstrates no evidence of inflammation or fibrosis. Bowman’s capsule that surrounds the glomerulus is thin. The basement membrane is thin and without inflammation or thickening. Within the outer cortex, glomeruli with delicate capillary loops are seen. It consists of the cortex and the medulla. The kidney excretes soluble waste from the body and controls electrolyte balance.
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