Which rickettsial disease can lead to endocarditis?
A) Q fever
B) typhus
C) Rocky Mountain spotted fever
D) scrub typhus
Answer: A
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A patient was suspected of having a rickettsial infection after hiking in the Rocky Mountains. A Weil-Felix test was performed, which resulted in no agglutination observed. Which one of the following statements explains this discrepancy?
a. Detection of rickettsial infections using strains of Proteus is not as specific as other serologic tests; therefore the infec-tions should be retested with a newer me-thod. b. The Weil-Felix test is not the appropriate test to order; it cannot detect cross-reacting antibodies. c. Rickettsial antibodies should be tested using the fluorescent treponemal antibody absorption (FTA-ABS) test, not the Weil-Felix test. d. No discrepancy is present. Rickettsial an-tibodies do not agglutinate with Proteus antigens.
The systemic circulation of blood flow begins when blood enters the ____
a. right atrium b. right ventricle c. left atrium d. left ventricle e. lungs
Three organs in the human body are involved in the production of vitamin D; they are the ________, ________, and ________
Fill in the blank(s) with correct word
Of all the elements that occur on earth, how many are found in your body?
A) 4 B) 10 C) 25 D) 90 E) 100