Medically important protozoa

Question 1

What cellular part allows movement of these protozoa?

Amoebas

Cilliated

Flagellated

Apicompexan

Answer 1

Amoebas= pseudopods

Cilliated= Cilia

Flagellated= Flagella

Apicompexan= No movement

Question 2

What types of worms are included in these helminths?

Nematodes

Trematodes

Cestodes

Answer 2

Nematodes= Roundworms

Trematodes= Flukes

Cestodes= Tapeworms

Question 3

Entamoeba histolytica

• What disease do they cause?
• What are the signs?

Answer 3

• Amebiasis
• Dissolve tissue, weight loss, and hemorrhage

Question 4

Entamoeba histolytica

How does it travel throughout the body (pathway)?

Answer 4

1. Cysts settle in small intestines
2. trophozoites attach to large intestines by pseudopods

Question 5

Naegleria fowleri

• What disease does it cause?
• What are the signs?

Answer 5

• Brain infection (brain-eating amoeba)
• Causes hemmorage and coma

Question 6

Naegleria fowleri

• Where is it found outside of humans?
• Where does it enter/travel to?

Answer 6

• Found swimming in freshwater
• Enters through nose/travels to brain

Question 7

Balantidium coli

• What disease does it cause?
• What are the signs?

Answer 7

• Balantidiasis
• Nausea/vomiting

Question 8

Balantidium coli

• Where is it naturally found?
• Where does it stay in humans?

Answer 8

• Naturally in pigs
• Attaches to small intestines/ burrows into epithelium

Question 9

Trichomonas vaginalis

• What disease does it cause?
• What are the symptoms?

Answer 9

• STD= Trichomoniasis
• Smelly green-yellow discharge.

Question 10

Trichomonas vaginalis

What is its life cycle?

Where does it target/stay?

Answer 10

• Only trophozoites
• Targets urogenital tract

Question 11

Giardia intestinalis

What disease does it cause?

What are the symptoms?

Answer 11

• Giardiasis
• Abdominal pain and FARTING

Question 12

Giardia intestinalis

Where does it target/live?

Answer 12

Targets duodenum, feeds in jejunum

Question 13

Plasmodium malariae

What disease does it cause?

What are the symptoms?

Answer 13

• Malaria
• Sweating in 48 hour cycles and anemia

Question 14

Plasmodium malariae

• What is its life cycle?
• Where does each life cycle stay in human?

Answer 14

• Sporozoites injected into blood: travels to liver
• Becomes merozoites in liver

Question 15

Taxoplasmosis gondii

• What disease does it cause?
• What are the symptoms?

Answer 15

• Taxoplasmosis
• Brain/heart/lung lesions

Question 16

Taxoplasmosis gondii

How does it infect humans?

Answer 16

1. Cat releases oocytes in litterbox
2. Human injest oocytes

Question 17

Ascaris lumbricoides

• What is it?
• Where does it travel throughout human?

Answer 17

• Intestinal nematode

1. Larva hatch in intestine
2. Enter lymphatics
3. travel to heart and lungs

Question 18

Enterobius vermicularis

What disease does it cause?

What are the symptoms?

Answer 18

• Pinworm infection
• Anal itching and sleeplessness

Question 19

Enterobius vermicularis

• How does it spread?
• who does it commonly infect?

Answer 19

• Sticky eggs that get under fingernails
• Most common of children

Question 20

Wucheria bancrofti

• Where does it stay in host?
• What does it cause?

Answer 20

• Enters skin and travels to lymphatic system
• Elephantitis when it blocks lymphatic channels

Question 21

Loa loa

What disease does it cause?

What are the symptoms?

Answer 21

• Eye worm
• Marble sized lesions/slithering in skin

Question 22

Schistosoma mansomi

• What disease does it cause?
• What are the symptoms?

Answer 22

• Blood flukes
• Bladder obstruction

Question 23

Schistosoma mansomi

• How does it enter?
• Where does it travel throughout the body?

Answer 23

• Enters hair follicles when swimming
• Travels to liver and exits in urine

Question 24

Taenia saginata

• What disease does it cause?
• What are the symptoms?
• Where is it naturally found?

Answer 24

• Tapeworm infection
• Plogottids (body segment) in poop
• Cattle