Which of the following is a negative pair? Streptococci: Catalase negative Esche

Question

Which of the following is a negative pair? Streptococci: Catalase negative Escherichia coli: oxidase negative Escherichia coli: O157:H7: Sorbitol fermenter Salmonella: coli: lactose non-fermenter Staphylococcus epidermidis coagulase negative In most cases, the term "flash-eating bacteria" is used to describe infections caused by the bacterium known Gonococcus Staphylococcus aureus Meningococcus GAS Which of the following organisms doesn't produce an exotoxin? Staphylococcus aureus Shigella aureus ETEC Salmonella typhi Which of following is not a Gram-negative rod that causes gastroenteritis?

Explanation / Answer

15. c. E.coli O157:H7:sorbitol fermenter

16. b. Staphylococcus aureus

17. d. Salmonella typhi

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