Parasitology Exam

flagellates, amoebae, sporozoans, ciliates, opalinids

I.  Identify the following organisms.  (50 points)

1.  no cysts, paratenic hosts

2.  commensal, small intestine

3.  Nosopsyllus fasciatus, ablastin

4.  Glossina morsitans, Kenya

5.  binucleate, large intestine, mild pathogen

6.  lethargy,  chills, fever, tyrosine depletion

7.  Lutzomyia, northern  Argentina

8.  fatty stools, von Leeuwenhoek

9.  large intestine, commensal, filth flies

10.  pian bois, Paraguay

11.  flagella, pseudopodia, intestinal pathogen

12.  Turkey, phlebotomine, cutaneous

13.  Russia, monoxenous, equine

14.  trypomastigotes, dyskinetoplasty, South America

15.  African ruminants, Glossina swynertonni

16.  dipterans, Mexico

17.  geographical variant of espundia agent in western hemisphere

18.  South American, thatched roofs

19.  spleen, liver, WBCs, intestinal lymph nodes, cats

20.  pussy discharge

21.  amphibians, continental drift hypothesis

II.  Briefly discuss three epidemiological factors involved in the spread of the following organisms.  (15 points)

1.  Trypanosoma cruzi

2.  Leishmania donovani

3.  Trypanosoma brucei gambiense

III.  Fill in the chart. (20 points)

ORGANISM      SITE OF INFECTION      VECTOR             DISEASE       GEOGRAPHICAL       DIAGNOSIS

                                    ear                                                                                      Mexico

                                                                        flea                          none

                                   liver                                                                                                                        LD bodies in biopsy

                                                                      sand fly                      Jericho boil

                                                                                                                                 Brazil                         xenodiagnosis

IV.  Arrange the following significant events in chronological order.  (10 points).

1.  a.  discovery of Giardia

    b.  Carlos Chagas

    c.  Linnaeus

    d.  Bruces' discovery of tsetse flies significance

    e.  life cycle of tapeworms

2.  a.  Walter Reed

    b.  Fasciola hepatica identification

    c.  term symbiosis coined by du Bary

    d.  Trypanosoma lewisi immunity study

    e.  trematode larvae identification

3.  a.  ultrastructure of Trypanosoma

    b.  development of metronidazole

    c.  ablastin discovery

    d.  Asa  Chandler

    e.  identification of cause of  Chagas disease

4.  a.  Leishman,  Donovan

    b.  Giardia, von Leewenhoek

    c.  Dientamoeba as a monocercomonadidae

    d.  identification of Trichomonas vaginalis by Donne

    e.  World War I

5.  a.  du Bary symbiosis

    b.  Pasteur debunking spontaneous generation

    c.  Moufet-spontaneous generation

    d.  Gerald Schmidt author

    e.  Francesco Redi

V.  Draw the following with large, neat, well labeled diagrams . (15 points)

   1.  erythrocytic cycle of Plasmodium vivax

2.  the morphological forms of Trypanosoma cruzi encountered in a life cycle study

3.  a tissue section of the human colon showing the invasive nature of Entamoeba histolytica

4.  the infective stage of Trichomonas vaginalis

5.  the infective forms of all intestinal (large and small intestine) pathogenic, protozoan parasites of man