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21. Sereny test is used for the detection of

A. enteropathogenic Escherichia coli
B. enterotoxigenic E. coli
C. enteroinvasive E. coli
D. verotoxigenic E. coli

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22. Prodigiosin (red pigment) is produced by members of genus

A. Hafnia
B. Enterobacter
C. Serratia
D. Citrobacter

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23. Which of the following serotypes of Salmonella can cause gastroenteritis?

A. S enteritidis
B. S Newport
C. S Typhimurium
D. All of these

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24. Sylvatic plague occurs in

A. mice
B. squirrels
C. chipmunks
D. all of these

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25. Verotoxin 1 of Escherichia coli is similar to

A. cholera toxin
B. Shiga toxin
C. heat-stable enterotoxin of E. coli
D. heat-labile enterotoxin of E. coli

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