Parasitology

Lecture Exam IV

Thomas P. Buckelew, Ph. D.

Fall 2005

 

I.                    Identify the nematode (20 points)

1.      oasis, copepods

 

2.      liver, rodents, aphasmidean

 

3.      obligatory circulatory migration, Loeffler’s pneumonia

 

4.      Chryops dimidiata, Calabar’s swellings

 

5.      20” long, small intestine

 

6.      appendicitis, dioecious, cellophane tape test

 

7.      polar bears, fish, plankton, eskimos

 

8.      anemia, stylet, one billion + worldwide, monoxenous life cycle

 

9.      fused spicules, slave trade, cutting plates

 

10.  AIDS related, free living adults

 

11.  visceral larva migrans, rodents

 

12.  Aedes, lymphatic obstruction

 

13.  two intermediate hosts, mink

 

14.  marine fish, porpoises, stomach

 

15.  pinworm of chickens, hyperparasitism, Histomonas meleagridis

 

16.  sheathed microfilaria, Singapore

 

17.  three pairs of “teeth”, anemia, copulatory bursa

 

18.  highly resistant egg capsules, “warty”

 

19.  Ascaris, Giardia, Entamoeba histolytica, common co-inhabitants

 

20.  frogs, strongyloid-like life cycle


 

 

II.                 Identify the Parasite (20 points)

 

1.      Flagyl, octaflagellate

2.       

3.      alveolar cyst, fox trappers

 

4.      drunken crab, Semisulcospira, rice paddies

 

5.      filariform, ground itch

 

6.      “sticky” schizonts, brain involvement, high fever

 

7.      Flagyl, venereal disease

 

8.      cysticercosis

 

9.      Winterbottom’s sign, Glossina, Kenya

 

10.  dioecious, caecum, anemia, “plugged” egg capsules

 

11.  gallinaceous, caecum, self-limiting disease, occysts

 

12.  fish, copepods, pernicious anemia

 

13.  ciliate, dysentery

 

14.  cats, epilepsy, zoitocyst

 

15.  facultative, hot springs, amebomeningoencephalitis

 

16.  Phlebotomus, cutaneous, Iraq

 

17.  Tenebrio, cysticercoid, heteroxenous

 

18.  Panstrongylus megistus, thatched roofs, xenodiagnosis

 

19.  dysentery, quadrinucleate cysts

 

20.  Yangtze River, Oncomelania formosona

 

21.  liver, halzoun, unembryonated egg capsules

 

III.               Discussion (20 points)

Detail the life cycles of  Necator, Strongyloides, and Ascaris.  How are the life cycles related?  How are they different?  Explain a possible evolutionary relationship between these three.

 

 

 

 

 

 

 

IV.              Fill in the chart with the nematode.  Do not use any twice. (20 points)

 

ORGANISM      INTERMEDIATE      DEFINITIVE HOST        MEANS OF            ENDEMIC         

                                        HOST                                                      INFECTION          COUNTRY  

                             (state none if                                                                                          (USA cannot          

applicable)                                                                                            be used)

                       

Ascaris lumbricoidess

 

 

                                    Simulium

                                    damnosum

 

                                                                              dog

 

                                                                                                              encysted larvae

                                                                                                               in muscle

 

                                                                                                                                                  Zaire

 

 

V.                 Give two epidemiological factors associated with each of the following. (10 points)

1.      Enterobius vermicularis

 

 

 

2.      Onchocerca volvulis

 

 

3.      Trichinella spiralis

 

 

 

4.      Necator americanus

 

 

 

5.      Strongyloides stercoralis

 

VI.  List the top ten parasites we have covered this semester and put them in order (#1 most important….#2 next in importance etc.  Make up your list taking into consideration, degree of pathology, mortality, incidence of infection worldwide, and general misery the organism causes.  Do not use any genus more than once.  (10 points)