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microbiology
week 3 quiz
| Question | Answer |
|---|---|
| Which method is the best for obtaining samples for evaluation of viral infection in the acute phase of respiratory disease? | Mucosal scraping |
| What step of the Gram stain procedure prevents the sample from washing off, helps to preserve the cell morphology, and kill the bacteria so they are permeable to the staining? | Heat fixing |
| Which of the following are resistant to heat, destruction, chemicals, and radiation? | spores |
| What is the mordant component in most Gram staining kits? | Iodine |
| What is the preferred culture media for performing the sensitivity test? | Mueller-Hinton |
| Which type of culture media contains additives that detect certain biochemical reactions of the bacteria? | Differential |
| What method is used to inoculate agar slant tubes? | Slant S streak |
| What is the counterstain component for most Gram staining kits? | Safranin |
| Which term describes rod-shaped bacteria? | Bacilli |
| What might cause improper staining with colonies of bacteria that are over 24 hours old? | Many bacteria are dead and do not stain |
| Which term refers to the texture of a bacterial colony on an agar plate? | Mucoid |
| Which of the following is an example of an area that is likely to contain a single organism? | Ears |
| What organisms are primarily identified with the use of acid-fast stains? | Mycobacterium |
| Which procedure involves inoculating the culture and sensitivity test plate with colonies from a pure culture? | Indirect sensitivity |
| How or when are microbiology samples best collected? | Aseptically |