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7 May 2018

Different serotypes of Salmonella enterica can causetwo diseases in humans: salmonellosis and typhoid fever.
(a) What are some general characteristics of Salmonellabacteria? (10 pts.)
(b) What are the differences between salmonellosis and typhoidfever? What are the symptoms, how is each disease treated, and howcan it be prevented? (10 pts.)
(c) Epidemiologists have noted that cases of salmonellosis are muchhigher during the summer than during the rest of the year. Cases oftyphoid fever, however, are constant throughout the year. How canyou explain these observations? (10 pts.) (Points : 30)

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