Because of the Complexity of the Schistosoma Life Cycle, There

question 56

Multiple Choice

Because of the complexity of the Schistosoma life cycle, there are several parts of the cycle that could be disrupted to halt the spread of the disease.Which of the following proposals is not likely to succeed in decreasing the prevalence of schistosomiasis?

• A)Apply chemical molluscicides (chemicals targeted to molluscs like snails) to bodies of fresh water.
• B)Monitor water bodies to detect the presence of infectious miracidia and enforce no bathing rules when they are present.
• C)Identify a surface protein on Schistosoma miracidia that the immune system can recognize and create a vaccine using that antigen.
• D)Install sanitary sewage treatment facilities to prevent the dispersal of eggs present in urine and feces.

---

Definitions:

Rate Of Return

The financial result, be it profit or loss, of investing over a certain length of time, depicted as a percentage of the initial investment value.

Preferred Stock

A class of ownership in a corporation with a higher claim on assets and earnings than common stock, usually with fixed dividends.

Required Return

The minimum rate of return an investor expects to achieve from an investment, considering its risk level.

Dividend

Profits shared by a corporation with its shareholders, usually through a formal distribution.