题目内容

芽变的变异性状一般与环境条件的变化相一致。

A. 对
B. 错

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Clostridium difficile is able to survive in the environment longer than most bacteria because it produces

A. anaerobes
B. Gram negative rods
C. Gram positive rods
D. spores

Which of the following bacteria can produce endotoxin?

A. Clostridium botulinum
Bacillus cereus
C. Escherichia coli O157
D. Staphylococcus aureus

Organisms that do not require oxygen for growth but grow better in its presence are called

A. facultative anaerobes
B. microaerophiles
C. obligate aerobe
D. obligate anaerobe

The primary toxin associated with invasive Clostridium perfringens infection is

A. neuraminidase
B. alpha toxin
C. hyaluronidase
D. coagulase

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