A 45-year-old man living in Arkansas made an appointment with his physician after developing several ulcerative lesions on his hands. He also had a high fever and swollen axillary lymph nodes. When taking the patient's medical history, the physician made note of the fact that the man had been hunting rabbits a week earlier, regularly drank unpasteurized milk, and had not received any vaccines since his childhood. What is the most likely cause of the man's current symptoms?
A. Brucellosis
B. Anthrax
C. Q fever
D. Tularemia
Answer: D
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The development of a blood substitute would be welcomed for all of the following reasons EXCEPT which one?
A) Human blood may carry and transmit infectious agents. B) Human blood storage requires refrigeration, which might not be available in developing countries. C) The supply of donated human blood generally cannot keep up with the demand. D) Transfused blood rarely persists for more than a few days in the recipient. E) Typing and cross-matching are necessary with human blood, and the right type may not be available.
Pasteur discovered that microbes can cause food spoilage. His solution to protect wine from spoiling was a process called pasteurization, which is based on what principle?
a. Heating beer and wine just enough to kill those organisms causing the spoilage b. The destruction of all microbes in the wine c. Filtration of the wine to remove all microbes d. Addition of specific disinfectants and food preservatives that prevent the spoilage
In your Ph.D. research, you use thin slices of brain tissue to study neuronal signaling. You attach an electrode to a single neuron, but cannot detect any activity. What is the most likely explanation?
A. When you sliced the brain, you disconnected the cell from its dendrites. B. Excessive myelination is blocking inputs to the cell. C. When you sliced the brain, you disconnected the cell from its neuroglia. D. Neurons are not electrically active -- you should be recording neuroglia instead.
Which is incorrect about shigellosis?
A. outbreaks have occurred in day care centers B. it is watery diarrhea with bloody, mucoid stools, and abdominal cramps C. it frequently involves septicemia D. human carriers cause fecal transmission E. it is also called bacillary dysentery