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Sporeformers
Food Micro Lab Final Exam
Question | Answer |
---|---|
Processing intended for food preservation should be adequate to destory spores or prevent ______. | germination |
What two types of spore-forming bacteria are of particular importance? | Bacillus spp. and Clostridium spp. |
What three microorganisms cause foodborne illness? | B. cereus, C. botulinum, C. perfringens |
T or F: Endotoxins are produced by gram negative bacteria. | True |
T or F: Endotoxins are more potent than exotoxins. | False |
T or F: Only gram positive bacteria product exotoxins. | False |
What are the steps needed for gram staining? | Fixation, crystal violet, iodine, decolorization (ethanol), counter stain (safranin) |
What are the steps needed for spore staining? | Steam bacteria with malachite green on top, water, counterstain (safranin), water, blot dry |