Which bacteria could be responsible for hemolytic uremic syndrome (HUS)?
A. enterotoxigeic strains of E. coli
B. Salmonella
C. Shigella dysenteriae
D. E. coli 0157:H7
E. enteroinvasive E. coli
Answer: D. E. coli 0157:H7
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Which of the following play a role in the diagnosis of syphilis?
A. Dark-field examination of lesion fluids B. Clinical history C. Immunofluorescence examination of lesion fluids D. All of the choices are correct.
An ecosystem
a. includes populations but not habitats. b. is the same as a community. c. consists of a community and the physical and chemical environment. d. is none of the above.
The number of chromosomes is reduced to half during
a. anaphase of mitosis and meiosis. b. meiosis II. c. meiosis I. d. fertilization. e. interphase.
In which way are you MOST likely to become infected by the parasite Cyclospora cayetanensis?
a. contaminated fruits or vegetables b. contaminated milk c. infected animal bite d. sexual intercourse with an infected partner