A skin snip is performed, and microfilariae with tapered tails, no nuclei, and unsheathed are microscopically observed. The recommended therapy for this infection is:
a. ivermectin.
b. diethylcarbamazine.
c. antihistamines.
d. mebendazole.
A
The organism is O. volvulus. Definitive diagnosis is made with the identification of the adult worm from tissue such as in a nodule or skin snip. The microfilaria lacks a sheath. The tail is ta-pered, appears bent or flexed, and does not include nuclei. Ivermectin is the rec-ommended treatment.
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Which one of the following statements about the incorporation of selenocysteine into proteins is true?
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Primary growth at the apical meristems can produce cells that differentiate into each of these cell types, except which?
A. leaves B. ground tissue C. procambium D. cork cambium E. epidermis
Which of the following most likely indicates an infection?
a. sugar in urine b. acidic urine c. alkaline urine d. luteinizing hormone in urine e. protein in urine
In a urine test, what may indicate damaged kidneys?
a. urine high in proteins b. high sugar content c. acidic urine d. alkaline urine e. chemicals present in urine