In performing xenodiagnosis for Trypanosoma cruzi, you should:
a. Ensure that all the bugs in the laboratory are fed with a blood meal every other
b. Initially screen the bugs' fecal deposits in order to determine they are free from
Dissect the bugs only after you have confirmed the presence of T. cruzi in three
successive fecal deposits.
d. Place the bugs in a 0.5 percent formaldehyde solution immediately after they
have been allowed to feed on the patient's blood.
In using the Field's stain for malarial parasites, you should:
a. Prepare the various required solutions and dip a thin blood smear into them as
per stated directions.
b. Prepare at least two liters of each of the required solutions before beginning the
Place the slide horizontally on a slide rack in order to maximize the staining of
the malarial parasites.
d. Prepare a thick blood smear to be stained.
Certain information should be affixed to the label of a stool specimen to prevent
mixing. This information includes:
a. The patient's name.
b. The patient's identification number.
The name of the attending physician.
d. The date and time of the stool collection.
e. All the above.