21. Principles of Disease

Mark each statement as true or false. Rewrite the false statements to make them true by changing the underlined word(s).

__________ Humans can become intermediate hosts for Taenia saginata.

Mark each statement as true or false. Rewrite the false statements to make them true by changing the underlined word(s).

__________ Fasciola hepatica can be acquired by eating infected sheep.

Mark each statement as true or false. Rewrite the false statements to make them true by changing the underlined word(s).

__________ The number of cases of schistosomiasis has increased worldwide because of improved technology and economic stability in endemic areas.

Mark each statement as true or false. Rewrite the false statements to make them true by changing the underlined word(s).

__________ Wuchereria bancrofti is a filarial nematode that infects the lymphatic system.

Balantidium coli can be distinguished from Entamoeba histolytica microscopically because B. coli has ___________.

____________ may be transmitted to humans from cat litter boxes.

African sleeping sickness is caused by Trypanosoma ______________ but not by Trypanosoma _____________.

The parasitic amoeba _____________ can be acquired by ingestion.

Both Plasmodium vivax and P. ovale can form dormant ______________.

Of the parasitic helminths discussed in this chapter, the only one transmitted by mosquitoes is _____________ .

The following helminths can directly penetrate the skin of humans to establish infection:, ____________ , _____________ , and ________________  (give genera only).

A trematode that can be acquired by eating raw or undercooked vegetables is _____________ .

Hookworm disease is caused by ____________ in the Middle East.

Both of the following parasites demonstrate nocturnal movement, which is important during diagnosis: __________ and _____________ .

Match the numbered organism with the correct lettered term. Answers may be used more than once, and an organism may have more than one answer.

1. ___ Balantidium coli

2. ___ Echinococcus granulosus

3. ___ Fasciola spp.

4. ___ Leishmania spp.

5. ___ Plasmodium falciparum

6. ___ Plasmodium vivax

7. ___ Taenia spp.

8. ___ Toxoplasma gondii

9. ___ Trypanosoma

10. ___ Wuchereria bancrofti

A. Miracidia

B. Bradyzoites

C. Schizogony

D. Microfilaria

E. Hydatid cyst

F. Cysticerci

G. Trophozoites

H. Amastigotes

I. Hypnozoites

J. Flagellated trypanosomes