Why Is It Not Possible to Use Koch's Postulates to Show

question 69

Multiple Choice

Why is it not possible to use Koch's postulates to show that Treponema pallidum causes syphilis?

• A) T. pallidum is a Gram-negative organism.
• B) T. pallidum cannot be grown in pure culture.
• C) T. pallidum causes different diseases in different hosts.
• D) Syphilis is a polymicrobial disease; T. pallidum is only one of the causative agents involved in the disease.
• E) T. pallidum does not contain a genome.

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Definitions:

Direct Method

A way to prepare the cash flow statement where actual cash flow information from company’s operations segment is used.

Operating Expenses

Expenses incurred in the normal course of business operations, excluding costs of goods sold and depreciation.

Prepaid Expenses

Costs paid for in advance for goods or services to be received or used in the future, recorded as assets and subsequently expensed over the applicable period.

Indirect Method

A method used in cash flow statements to calculate net cash flow from operating activities by adjusting net income for non-cash transactions.