Once Infected with Borrelia Recurrentis, a 2- to 15-Day Incubation

question 7

Multiple Choice

Once infected with Borrelia recurrentis, a 2- to 15-day incubation period follows where high numbers of organisms are found in the blood. The infected individual experiences high fever, rigors, severe headache, muscle pains, and weakness. This febrile period lasts for about 3 to 7 days, but ends quickly with the induction of an immune response. However, a similar but less severe course of symptoms recurs several days to weeks later. What causes this relapse?

• A) The organism systematically changes its surface antigens during the course of a single infection.
• B) The organism produces extracellular toxins that cause the symptoms.
• C) This organism survives inside infected cells and once the cell dies, the organism is released into the blood, causing this relapse.
• D) This relapse occurs as the host is trying to mount the secondary antibody response.

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Definitions:

Market System

Refers to the network of buyers, sellers, and other actors that come together to trade in a given product or service.

Ultimatum Game

An economic experiment in which two players decide how to divide a sum of money; one proposes the split, and the other accepts or rejects it, demonstrating negotiation and fairness standards.

Utility

Numerical score representing the satisfaction that a consumer gets from a given market basket.

Distribution

The process of making a product or service available for use or consumption by a consumer or business user.