21. Principles of Disease

Which of the following is most effective in preventing infection by Giardia? __________          

a. Sexual abstinence

b. Drinking only bottled water

c. Use of insect repellent

d. Cooking all food

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

__________ Sexual contact is the most common method of transmission of parasites.

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

__________ Examination of stool samples can reveal the presence of Naegleria parasites.

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

__________ Trichomonas vaginalis is the most common parasitic protozoan of humans in the industrialized world.

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

__________ Trypanosoma brucei is transmitted by tsetse flies, and Trypanosoma cruzi is transmitted by kissing bugs.

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

__________ Plasmodium falciparum causes the most serious form of malaria.

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

__________ Toxoplasmosis can be transmitted across a placenta.

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.