Microbiology

Microbiology Study Guide 61. Which of the following is true about nosocomial infections? a. They are always caused by medical personnel b. They are always caused by pathogenic bacteria c. They are acquired during the course of hospitalization d. A and C only 62. What is the most abundant class of antibodies in serum? a. IgA b. IgE c. IgG d. IgM 63. Which is not a habitat for an extremophile? a. 100-degree Celsius water b. Inside of a rock c. In the Atlantic Ocean d. In a salt-evaporating pond 64. What will neutralize acids when added to a culture medium? a. Proteins b. Indirect ELISA b. Neutralization c. A direct fluorescent antibody d. A complement fixation 66. A concentration of 50% of ethyl alcohol is the most effective bactericide. a. True b. False Buffers c. Sugars d. All of the above 65. __________________ is the most useful in determining the presence of AIDS antibodies. a.

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