Which virulence factor of Group A streptococci (GAS) is responsible for the rapid spread of tissue death in necrotizing fasciitis?
A) streptokinase
B) coagulase
C) coagulase and hyaluronidase
D) hyaluronidase and streptokinase
E) hyaluronidase
Answer: D
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What is peristalsis?
A. A process of fat emulsification in the small intestine. B. Voluntary control of the rectal sphincters regulating defecation. C. The transport of nutrients to the liver through the hepatic portal vein. D. Loss of appetite, fatigue, dehydration, and nervous disorders. E. Smooth muscle contractions that move food through the alimentary canal.
Physicians are required to report new cases of gonorrhea to the CDC, whereas new cases of genital herpes are not notifiable. Evaluate the statements below and choose which statement best represents why some diseases are reportable and others are not.
A. Gonorrhea is more contagious than genital herpes. B. Gonorrhea affects certain populations and geographic areas, whereas genital herpes does not. C. Genital herpes is less deadly than gonorrhea. D. Gonorrhea is treatable with antibiotics and therefore may develop resistance; genital herpes is not treatable with antibiotics.
The nucleolus is a highly active region of the nucleus that is required for synthesis of ribosomes.
Answer the following statement true (T) or false (F)
Genetically-engineered organisms that carry foreign DNA are ____
a. Mutated b. Transgenic c. Transformed d. Virulent
e. Diseased