19.4: Performance Objectives for Lab 19

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After completing this lab, the student will be able to perform the following objectives:

A. PARASITIC PROTOZOANS

DISCUSSION

1. Define the following: protozoan, trophozoite, cyst.

2. State how the following diseases may be transmitted to humans and briefly discuss how the diseases are diagnosed in the clinical laboratory:

a. amoebic dysentery

b. African sleeping sickness

c. giardiasis

d. genitourinary trichomoniasis

e. balantidiasis

f. malaria

g. toxoplasmosis

3. Describe the following in terms of the malarial life cycle: sporozoite, schizont, asexual cycle, sexual cycle.

4. State what causes the recurring fever of malaria.

RESULTS

1. Recognize the following organisms when seen through a microscope and state what disease they are associated with:

a. Entamoeba histolytica cysts in a fecal smear

b. Trypanosoma gambiense in a blood smear

c. Giardia lamblia cysts in a fecal smear

d. Trichomonas vaginalis in vaginal discharge

e. Balantidium coli in a fecal smear

f. Plasmodium merozoites in infected red blood cells

B. PARASITIC HELMINTHS

DISCUSSION

1. Define the following: helminth, ova, hermaphroditic.

2. List the three classes of parasitic helminths and state the common name for each class.

3. State how the following diseases may be transmitted to humans and state how each disease may be diagnosed in the clinical laboratory:

a. ascariasis

b. pinworms

c. trichinosis

d. tapeworms

e. flukes

4. Compare protozoans and helminths in terms of their size and structural complexity.

RESULTS

1. Recognize the following organisms or structures when seen through a microscope:

a. roundworms

b.Ascaris ova

c. pinworm ova

d. Trichinella in muscle tissue

e. tapeworms

f. scolex of a tapeworm

g. ova and uterus in a gravid proglottid of a tapeworm

h. flukes