Exam 8: Microbiology

In a properly performed Gram stain procedure, what color are the gram-negative organisms immediately after the decolorizing stage?

Which of the following organisms has a characteristic jerky movement? (Hint: It was seen in the microscopic urinalysis video.)

The presence of microorganisms growing on a laboratory medium is called ____________________.

Which of the following describes a coccus bacterium?

Which of the following is the correct way to write the name of an organism?

A disease state that occurs when pathogenic microorganisms invade the body and overcome its natural defense mechanisms is a(n) ____________________.

Having the pink color of the counterstain used in Gram's method refers to ____________________.

What is the name of the tiny roundworm whose female normally lays her eggs during the nighttime hours in the anal area of the human host, causing itching of this area?

_______________ means an infection capable of forming pus.

Which of the following is the causative agent of the plague?

When collecting microbiologic specimens, medical professionals must strive to prevent the spread of infection to others or to themselves.Which of the following precautions is incorrect?

In the following table, determine the color (pink/red, purple, or colorless) of the gram-positive and gram-negative organism after each step in the Gram stain reaction. Gram Stain Reactions Stain Step Staining Reagent Color of Gram-Positive Organism Color of Gram-Negative Organism primary stain crystal violet mordant Gram's iodine decolorizer acetone or ethyl alcohol counterstain safranin

Which of the following causes smallpox?

Which of the following organisms produces a neurotoxin, the most poisonous natural substance known, which causes dry mouth, dilated pupils, and a progressive muscle weakness that leads to respiratory failure and death?

A(n) _______________ contains medium in which to grow microorganisms.

A visible mass of bacteria formed on a culture medium by one bacterium growing and replicating is a(n) ____________________.

_____________ is a component made of polysaccharides and peptides that gives rigidity to the bacterial cell wall.

In the Gram stain procedure, what is the most critical differentiating step?

Which of the following statements about Neisseria gonorrhoeae is incorrect?

Which of the following causes viral hemorrhagic fever?