The Protozoa Lab exam Study Guide

Question 1

Live, feed and grow at expense of host; can be microscopic animals, fungi, bacteria, viruses and protozoa

Answer 1

Parasites

Question 2

Attributes of a successful parasite

Answer 2

• Effective dispersal, can be inhalation, contact, vector borne, ingestion
• Hide from host immune system
• Dont kill Host or Kill slowly

Question 3

Animal like protist

Answer 3

Protozoa

Question 4

These are all Eukaryotes

Answer 4

Protozoan Parasites

Question 5

4 groups of Protozoa (based on locomotion)

Answer 5

• Ciliates
• Amoebae
• Flagellates
• Apicomplexans

Question 6

Protozoan Parasites can exist in two forms

Answer 6

Trophozoite

Cyst

Question 7

Trophozoite

Answer 7

A feeding and reproducing stage (Lives within the Host)

Question 8

Cyst

Answer 8

Dormant, can live in environment and infect new Host

Question 9

Excystment

Answer 9

After ingested cyst develops into tropozoite , active and feeding stage

Question 10

Encystment

Answer 10

Cyst formation before exiting the body (fecal route) helps protect and infect new host

Question 11

Use cilia for locomotion and or acquiring food

Answer 11

Ciliates

Question 12

Found in intestinal tracts of animals, usually pigs, the only ciliate to cause disease in humans
Commonly infected by consuming food or water contaminated with feces containing cysts

Answer 12

Balantidium coli

Question 13

Excystment occurs in small intestines

Answer 13

Balantidium coli

Question 14

Balantidium coli results in

Answer 14

Balantidiasis

Question 15

Balantidiasis

Answer 15

Diarrhea, abdominal pain weight loss and dysentery

Question 16

Causes Amebic Dysentery

Answer 16

Entameba Histolytica

Question 17

Ingested by contaminated food and water

-Cyst in the water (Asymptomatic in ~10% of human population)

Answer 17

Entameba Histolytica

Question 18

Pathology of Entameba Histolytica

Answer 18

• Ingest cysts
• pass through stomach
• Excystment in the small intestine
• Trophozoites release enzymes and penetrate the intestinal lining
• Creates ulcers and then cause symptoms

Question 19

Characterized by having no truly defined shape, using, pseudopodia to move and acquire food

Answer 19

The Amoebae

Question 20

Amebiasis

Answer 20

Infection caused by amoebas

Question 21

Symptoms of Amebiasis; Amebic dysentery

Answer 21

Diarrhea and bloody stools

• cramps
• vomiting
• weight loss
• Malaise
• Angery

Question 22

Must find trophozoites in stool to identify amoeba from bacteria
*Antibody tests are used for identification

Answer 22

Diagnosis of Amebic Dysentery

Question 23

Causes fatal infections in brain
Rare incidence
Common in warm lakes, ponnds, moist soil
Transmission can occur through open wounds, eyes, or ingesting contaminated water

Answer 23

Acanthamoeba and Naegleria

Question 24

Lives on the surface of teeth; Base of gums, tonsils

Answer 24

Entameba gingivalis

Question 25

Has been implicated as a cause fo ginigivitis

Tranmission is by kissing

Answer 25

Entameba Gingivalis