Why Is It Not Possible to Culture Treponema Pallidum in Vitro

question 42

Multiple Choice

Why is it not possible to culture Treponema pallidum in vitro?

• A) The organism is an obligate intracellular parasite AND the organism is a psychrophilic anaerobe.
• B) The organism is an obligate halophile AND the organism is highly motile and requires actin from host cells to make tails for movement.
• C) The organism lacks mitochondria and obtains all of its essential macromolecules from the host AND the organism is Gram-negative.
• D) The organism is highly motile and requires actin from host cells to make tails for movement AND the organism is Gram-negative.
• E) The organism obtains most of its essential macromolecules from the host AND the organism is an obligate intracellular parasite.

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