Patho Ch 9

7. Which of the following diseases or conditions is caused by the bite of an infected insect? A. Malaria B. Cryptosporidiosis C. Toxoplasmosis D. Pinworm infestation E. Trichinosis

A. Malaria

5. Which protozoal infection may result from eating incompletely cooked meat contaminated by a parasite? A. Toxoplasmosis B. Cryptosporidiosis C. Histoplasmosis D. Giardiasis

A. Toxoplasmosis

11. The parasites that cause malaria in humans begin their development within the __________. A. liver B. red blood cells C. lungs D. stomach

A. liver

14. Babesia microtis is usually transmitted to humans from: A. small rodents. B. cats, dogs, and other pets. C. insects. D. none of the above.

A. small rodents.

8. The most commonly encountered parasitic worm is the __________. A. pinworm (Enterobius vermicularis) B. Ascaris lumbricoides C. Trichinella spiralis D. Sarcoptes scabiei

B. Ascaris lumbricoides

13. __________ are tick-borne protozoal parasites that can cause malaria-like illness. A. Plasmodia B. Babesiae C. Cryptosporidia D. None of the above

B. Babesiae

3. Pregnant women susceptible to toxoplasma infection should avoid contact with which of the following? A. Mosquitoes B. Cat feces C. Raw sewage D. Ticks

B. Cat feces

4. Which of the following conditions may result from contact with cat feces? A. Cryptosporidiosis B. Toxoplasmosis C. Malaria D. Pinworm infestation E. Tapeworm infestation

B. Toxoplasmosis

19. The main symptom of pinworm infestation is: A. severe diarrhea. B. intense anal and perianal itching. C. fever. D. dizziness.

B. intense anal and perianal itching.

15. The __________ plays an important role in controlling Babesiae infection because its blood filtration function eliminates many of the parasites as blood flows through it. A. heart B. spleen C. stomach D. liver

B. spleen

12. About __________ million people die of malaria each year. A. 100 B. 10 C. 1 D. 0.5

C. 1

9. __________ are thick, fleshy, short worms that have suckers for the attachment to the host. A. Roundworms B. Tapeworms C. Flukes D. none of the above

C. Flukes

17. __________ inhabits the duodenum and upper jejunum, and causes intestinal inflammation manifested by crampy abdominal pain, distention, and watery diarrhea. A. Malaria B. Babesiosis C. Giardiasis D. Amebiasis

C. Giardiasis

2. Many parasites are transmitted by contaminated food or water or by contact with infected animals. Which of the following parasitic diseases is NOT transmitted in this manner? A. Toxoplasmosis B. Giardiasis C. Malaria D. Cryptosporidiosis

C. Malaria

1. Which of the following statements regarding cryptosporidiosis is INCORRECT? A. Infection may be acquired from drinking water contaminated with parasite cysts. B. Parasites are present in the intestinal tracts of cattle and many farm animals, and infectious cysts are excreted in their feces. C. Parasite cysts are quite fragile and do not normally survive outside of the intestinal tract of infected persons. D. Infection may be acquired from swimming in a swimming pool in which the pool water has been contaminated by parasite cysts from the perianal skin of infected persons with diarrhea who have also been swimming in the pool. E. Infection causes an acute self-limited diarrhea in immunocompetent persons, but may cause chronic life-threatening diarrhea in immunocompromised persons.

C. Parasite cysts are quite fragile and do not normally survive outside of the intestinal tract of infected persons.

20. __________ is caused by a small parasite that burrows in the superficial layers of the skin, where it lays eggs that hatch in a few days. This causes intense itchiness. A. Lice B. "Swimmer's itch" C. Scabies D. All of the above

C. Scabies

6. Which of the following worm infestations may result from eating incompletely cooked meat contaminated by a parasite? A. Malaria B. Giardiasis C. Trichinosis D. Pinworm infestation

C. Trichinosis

18. Which of the following is a group of metazoal parasites? A. Roundworms B. Tapeworms C. Flukes D. All of the above

D. All of the above

16. __________ is an infection of the intestinal tract by a pathogenic ameba. A. Malaria B. Babesiosis C. Giardiasis D. Amebiasis

D. Amebiasis

10. An animal on or within which a parasite lives is called the __________. A. master animal B. arthropod C. parasitic home D. host

D. host

True/False 36. Ascariasis or Ascaris infestation is diagnosed using a scotch tape swab method.

False

True/False 21. Ingested pinworm eggs mature in the intestines, invade the bloodstream, and are carried throughout the body.

False

True/False 22. Tapeworms inhabit the rectum and migrate out the anus to lay their eggs.

False

True/False 25. Mature Ascaris worms frequently migrate out the anus and lay their eggs on the perianal skin.

False

True/False 26. Trichinella spiralis organisms live in the soil, and people become infected by contact with infected soil.

False

True/False 28. The crab louse (Pediculosis pubis) commonly infests the scalp hair of children and may be spread by sharing combs or hats, which transmit the lice from child to child.

False

True/False 30. Animal parasites are capable of free-living existence.

False

True/False 34. Trichinosis is transmitted via skin penetration of larval forms of the round worm Trichinella spiralis.

False

True/False 38. Anti-parasitic drugs are available to treat cryptosporidiosis.

False

True/False 35. A scotch tape swab is used to diagnose pinworm infestation.

True

True/False 23. Ascaris lumbricoides is a large round worm that inhabits the small intestine.

True

True/False 24. Mature Ascaris worms may migrate into the appendix, biliary ducts, or other parts of the gastrointestinal tract.

True

True/False 27. "Swimmer's itch" is an itchy skin inflammation (dermatitis) caused by swimming in water contaminated by bird or animal schistosomes.

True

True/False 29. The larval form of Trichinella spiralis becomes encysted in the muscles of infected people or animals.

True

True/False 31. The infectious form of toxoplasma gondii that is found in cat feces is called an oocyst.

True

True/False 32. Ooscysts can be removed from municipal water supplies only by filtration.

True

True/False 33. Tapeworms sometimes grow to a length of several feet.

True

True/False 37. Cryptosporidiosis in immunocompromised individuals can result in severe, life-threatening diarrhea.

True