Explain the incidence pattern shown on the graph .
Salmonella heidelberg gastroenteritis occurred on three cruises aboard the T.S.S. Festivale. Figure 14.4 shows on-board clinic visits for diarrheal illness between February 10 and March 3.
a. Explain the incidence pattern shown on the graph .
b. What are probable modes of transmission?
c.. What changes would you recommend before the ship books more cruises after March 3?(30 points)
