Which type of media contain at least one ingredient that is not chemically defined?
Which type of media contain at least one ingredient that is not chemically defined?
Synthetic media contain pure organic and inorganic compounds that are chemically defined (i.e. known molecular formula). Complex or enriched media contain ingredients that are not chemically defined or pure (i.e. animal extracts). Enriched media are used to grow fastidious bacteria.
What is a common medium used for growing fastidious bacteria?
Cards
| Term The five I’s of studying microorganisms include all of the following except | Definition infection |
|---|---|
| Term Which method often results in colonies developing down throughout the agar and some colonies on the surface? | Definition pour plate |
| Term A common medium used for growing fastidious bacteria is | Definition blood agar |
Which of the following describes selective media?
What is the definition of selective media? Selective media incorporate chemical substances that inhibit the growth of one type of bacteria while permitting the growth of another.
What are the three physical forms of laboratory media?
solid, semisolid, and liquid.
What type of media would be the best choice for isolating a bacterial colony?
EMB agar is a medium used in the identification and isolation of pathogenic bacteria. It contains digested meat proteins as a source of organic nutrients.
What happens if a blood sample is Hemolyzed?
Hemolysis describes the rupture of red blood cells (erythrocytes) and release of their contents such as haemoglobin or potassium into the surrounding plasma. In a clinical environment this type of blood sample contamination frequently happens because of improper specimen collection or poor sample handling techniques.
Which of the following can cause Hemolyzed samples?
Causes of hemolysis
- Hemolysis can be caused by:
- Shaking the tube too hard.
- Using a needle that is too small.
- Pulling back too hard on a syringe plunger.
- Pushing on a syringe plunger too hard when expelling blood into a collection device.
How do specimens get Hemolyzed?
Hemolysis may be due to specimen collection, processing, or transport. Hemolysis may also be due to pathological conditions, such as immune reactions, infections, medications, toxins and poisons, and therapeutic procedures. Frequently, laboratory testing can still be performed on a hemolyzed sample.