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7751 Microbiology

A 9-year-old child is brought to the emergency room with the chief complaint of enlarged, painful axillary lymph nodes. The resident physician also notes a small, inflamed, dime-sized lesion surrounding what appears to be a small scratch on the forearm. The lymph node is aspirated and some pus is sent to the laboratory for examination. A Warthin-Starry silver impregnation stain reveals many highly pleomorphic, rod-shaped bacteria. Which of the following is the most likely cause of this infection?

ABartonella henselae
BBrucella canis
CMycobacterium scrofulaceum
DYersinia enterocolitica
Microbiology
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7758 Microbiology

A 22 year old male with fatigue, recurrent fever, and enlarged cervical lymph nodes has numerous atypical lymphocytes in his peripheral blood smear. A biopsy from the patient’s enlarged node shows expansion of lymphoid follicles with preservation of the underlying architecture. Numerous atypical lymphocytes are present in the paracoical areas. This patient most likely has ?

AAIDS
BBurkitt's lymphoma
CHodgkin's Disease
DMononucleosis
Microbiology
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