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50457 Microbiology

Cholera toxin –

Aincrease the levels of intracellular cyclic GMP
BAct through opiate receptor
Ccauses continued activation of adenyl cyclase
Dinhibit the enzyme phosphodiesterase
Microbiology
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50459 Surgery

A 65-year-old man presented with an episode of syncope. He said he felt dizzy during defecation and noticed gross bleeding in the pan. Fecal occult blood test done 3 months ago as a part of routine screening for colon cancer was negative. There is no history of recent weight loss. What is the likely colonoscopic finding?

AEarly stage carcinoma colon
BSigmoid diverticulitis
CMicroscopic colitis
DDilated mucosal and submucosal veins in the colon
Surgery
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