Answer to Question 1
B
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Tetracyclines are useful in treating some animal bites and Lyme's disease. Ibuprofen is administered for the inflammation associated with the arthritic pain, but not to treat the infection. Phenazopyridine is not administered for Lyme's disease. Nitrofurantoin is administered for urinary tract infections.
Answer to Question 2
A, B, D
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In women, the most common causes are ovulation disorders, blocked fallopian tubes, endometriosis, and advanced maternal age, which affects egg quality and quantity. In men, causes include absence of sperm, declining sperm counts, testicular abnormalities, and ejaculatory dysfunction. Vaginitis cannot cause infertility, and fibromyalgia is not noted as a common etiological factor.