Laboratory Experiments in Microbiology (11th Edition)
11th Edition
ISBN: 9780321994936
Author: Ted R. Johnson, Christine L. Case
Publisher: PEARSON
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Chapter 11, Problem 3CT
Will the isolated colonies always be in the fourth sector on the streak plate?
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Laboratory Experiments in Microbiology (11th Edition)
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- What do you think the best method to detect Toxoplasma infection ?? Write the short introduction and the method??arrow_forwardWhat causes the viral plaques that appear on a bacterial lawnto stop growing larger?arrow_forwardHow is it that mold appeared on my samples? (in other words where did it come from or what is the source of the mold that grows on the samples?) I had 10 bags each bag had 3 slices of apple and 3 pieces of bread, 5 bags where left in a dark warm place and 5 where left in a bright warm place. 2 bags were control bags, 2 contained the fruit/bread and 1 tsp of vinegar, 2 contained fruit/bread and 1 tsp of water, 2 contained fruit/bread and 1 tsp of lemon juice, and 2 contained fruit/bread and 1 tsp of sugar water. The fruit and bread were mixed together in the same bag.arrow_forward
- A culture with approximately 3x104 cells/mL were incubated. After 3 hours, the number of cells had increased to 6x105 a) How many generations have occurred?arrow_forwardplates normally show a 10-fold decrease in colony number through the dilutions, e.g. 500 on Plate D, ~50 on E, ~5 on F, and maybe none on G. If this was not observed, what human errors might have contributed to inconsistent serial dilution? How could one ensure proper serial dilution technique for future labs?arrow_forwardHow long does it take for SSPE to appear after the initial infection?arrow_forward
- In General, the most suitable description for the origin of each colony formed on the surface of a solid medium is: a-Cluster of cells b-Colony forming unit c-Pair of cells d-Single cellarrow_forwardWhy does this toxin not kill the Bacillus?arrow_forwardTwo patients, with identical medical histories are in adjacent hospital beds. Each is infected with Streptococcus pneumoniae. Patient A's infection progresses to pneumonia while Patient B's infection resolves quickly. The microbial stain of the lung fluid from Patient A indicated the bacterial cells had a capsule, while Patient B's lung fluid stain did not. Why did the capsule affect the course of the infection in Patient A?arrow_forward
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