Parasitology Exam

flagellates, amoebae, sporozoans, ciliates, opalinids

I.  Identify. (20 points)

1.  Winterbottom's sign, Glossina palpalis

2,  Flagyl, undulating membrane

3.  commensal, oral, flagellated

4.  India, no reservoir hosts, dermal leishmanoid

5.  monoxenic, equines

6.  secondary infections, amastigotes, uta

7.  Tabanus, murrina

8.  no cysts, large intestine, undulating membrane

9.  Phlebotomus sargenti, acquired immunity, non-pigmented depressed skin

10.  vitamin deficiency, beavers

11.  kala-azar, infants

12.  megaesophagus,  Panstrongylus megistus

13.  enterohepatitis, yellowish diarrhea, hyperparasitism

14.  kinkajous, Panama, loggers, Lutzomyia

15.  lemon shaped cysts, trailing flagellum

16.  hyperparasitism, humans, a flagellate without flagella

17.  dyskinetoplasty, mal de Caderas

18.  Stercoraria, Nosopsyllus fasciatus

19.  endometritus, veneral disease, undulating membrane

20.  Tanzania, various reservoirs

II.  Short Answer (20 points)

1.  Explain the concept of pre-adaptation relative to the evolution of parasitism.

2.  Name any 5 significant events in the history of parasitology and chronologically arrange them (oldest first, most recent, last).

3.  How is the longevity of a host-parasite relationship (evolutionarily-speaking), related to the lethality of the interaction.

4.  Explain ELISA tests.

III. Name and describe three epidemiological factors related to the spread of the following parasites. (9 points)

1.  Trypanosoma cruzi

2.  Leishmania donovani

3.  Histomonas meleagridis

IV.  Why is identifying a commensal so important in examining a fecal smear?  (6 points).

V.  Fill in the chart. (30 points)

ORGANISM        VECTOR           VERTEBRATE      RESERVOIR           GEOGRAPHICAL           CONTROL
                         MECHANICAL HOST       HOST              HOST                       LOCATION             MEASURE

                                                                                         beavers

                              none

Trypanosoma
cruzi

                                                                                                                                                                          DDT

                                                            humans

                                                                                                                                      U.S.A.

VI.  Draw the flagellated forms seen in the life cycle of Trypanosoma brucei gambiense.  Make the drawings large enough to label fully.  How does the ultrastructure of the various forms relate to the environmental physiology of those forms.  (15 points)

 
cruzi