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. Install sanitary sewage treatment facilities to prevent the dispersal of eggs present in urine and feces.
B. Apply chemical molluscicides (chemicals targeted to molluscs like snails) to bodies of fresh water.
C. Identify a surface protein on Schistosoma miracidia that the immune system can recognize and create a vaccine using that antigen.
D. Monitor water bodies to detect the presence of infectious miracidia and enforce no bathing rules when they are present.
Answer: C
You might also like to view...
Which nonlactose-fermenting organism, that rarely causes human infection, grows poorly at 35°C; however, grows optimally between 20°C and 25°C?
a. Psychrobacter pulmonis b. A. xylosoxidans c. R. radiobacter d. S. putrefaciens
The big bang theory states that the universe began approximately ________ years ago
a. 3.5 billion b. 10,000 c. 1.2 million d. 120 million e. 13 billion
How do the gametes formed by bryophytes travel from location to another?
a. Cilia b. Flagella c. In the bellies of herbivores, such as birds d. Carried by the wind currents
You work for a successful company that sells maternity clothes. They have asked you to evaluate whether Australia or Singapore would be a better country to expand into with new stores. What keyword will help you find the data you need to make this evaluation?
A. range expansion B. dispersal C. metapopulation D. demographics