21. Principles of Disease

The only ciliate to cause disease in humans is __________.

a. Naegleria

b. Balantidium

c. Fasciola

d. Trypanosoma

Which of the following organisms is regularly transmitted sexually?  __________        

a. Trichomonas

b. Entamoeba

c. Trypanosoma

d. Enterobius

Leishmania species are transmitted by __________.

a. sand flies

b. tsetse flies

c. kissing bugs

d. mosquitoes

Cryptosporidium cannot be killed by routine boiling. Another parasite resistant to such boiling is __________.

a. Giardia

b. Trypanosoma

c. Toxoplasma

d. Plasmodium

Plasmodium species as well as Wuchereria bancrofti can be carried by mosquitoes in the genus __________.

a. Aedes

b. Anopheles

c. Culex

d. Ctenocephalides

Which of the following arthropods is responsible for transmitting the most parasitic diseases? __________         

a. Fleas

b. Ticks

c. Mosquitoes

d. True bugs

The majority of cestodes are transmitted via ___________ .

a. ingestion

b. vectors

c. direct contact

d. inhalation

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.