Streptokinase is an enzyme produced by streptococcal bacteria. This enzyme can lyse clots. Streptokinase is harvested from culture media and filter sterilized
This purified enzyme is injected into heart attack patients to dissolve clots that may be present in coronary arteries.
Why does this injection not harm the patient?
A. The enzyme is highly specific.
B. The enzyme will digest all proteins in the
blood.
C. The enzyme may damage the collagen in
the wall of the capillaries.
D. The enzyme causes the patient to run a
fever.
E. The enzyme is denatured at body
temperature.
Answer Key: A
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Three weeks after a river rafting trip, three family members experienced symptoms of coughing, fever, and chest pain. During the rafting trip, the family had consumed crayfish that they caught along the river banks. An examination of the patients' sputum revealed helminth eggs, and serum samples were positive for antibodies to Paragonimus. All of the family members recovered following treatment
with praziquantel. In the Paragonimus life cycle, A) the crayfish are the definitive host and humans are the intermediate host. B) humans are the definitive host and crayfish are the intermediate host. C) both humans and crayfish are intermediate hosts. D) both humans and crayfish are definitive hosts. E) the source of the infection was the river water.
Which of the following is not a risk factor for developing sepsis?
A) a wound B) nervous system infection C) chronic health issues such as cancer, diabetes, AIDS, and cardiovascular disease D) recent surgery or invasive procedures E) blunt force trauma