Which of the following statements concerning Toxoplasma infection Is CORRECT? Se

Question

Which of the following statements concerning Toxoplasma infection Is CORRECT? Select one: A. It is transmitted by biting insects. B. It is a rare infection. C. In most individuals, the infection results In lasting damage to the heart. D. Freshwater snails are intermediate hosts. E. It is typically contracted globally by eating undercooked meat. Lyme disease becomes chronic because Select one: A. Borrelia is an Intracellular parasite of erythrocytes. B. the bacterium resists phagocytosis. C. Borrelia can lie dormant in liver cells. D. Borrelia changes its surface antigens frequently. E. the bacterium resists phagocytosis and "hides" erythrocytes.

Explanation / Answer

1.

Answer: E

It is contracted by ingestion of raw or partly cooked meat especially pork, lamb, or Toxoplasma cysts. Up to half of the world's population is infected by toxoplasmosis but have no symptoms. Symptoms are influenza-like.

2.

Answer: D

Borrelia changes surface antigens frequently. Often more than one antibiotic is required even if a patient is infected with only one bacterium. For example, since Borrelia can take so many forms, a particular antibiotic might be effective against one form but not another, so a single antibiotic might kill only a portion of the bacterial population.

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