This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'TCBS agar is for? \nSelect and explain. \nA. Leptospira, B. Vibrio, C. Legionela, D. Bacteroides', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b (Vibrio)# The Vibrio organism appears as gram-negative, curved, motile bacilli.# The A subunit of the Vibrio enterotoxin activates adenyl cyclase, resulting in the hypersecretion of water, sodium, potassium, chloride, and bicarbonate into the intestine (diahrrea).# Vibrio gastroenteritis or cholera are associated with consumption of contaminated seafood or water.# Vibrio vulnificus is associated with cellulitis caused by trauma incurred in a seawater environment and carries a high mortality rate if not treated rapidly.# Vibrio species require salt for growth and can be differentiated from other organisms by growth on TCBS agar.', 'role': 'assistant'}]