Chapter 19 LAB

Question 1

protozoa

Answer 1

eukaryotic signle-celled organisms

Question 2

Cyst form

Answer 2

typically spherical or ovoid in shape, dormant, think-shelled and resistant to the environment

Question 3

Trophozoite form

Answer 3

typically motile, with flagella or cilia, may be pear-shaped or flat ovals

Question 4

Entamobea coli

Answer 4

Cysts, are common, non-pathogenic intestinal commensal of humans. Related species cause disease common in areas with poor sanitation

Question 5

Actions of Entamobea coli

Answer 5

Cysts pass through the stomach to reach intestines, once trophozoites emerge they parasite the intestinal mucosa and feed on red blood cells and bacteria

Question 6

Symptoms of Enatmobea coli

Answer 6

abdominal pain, bloody diarrhea, nausea, and vomiting

Question 7

Giardia lamblia cysts

Answer 7

lives in intestines, involves a person ingesting fecal contaminated water or food, trophozoite form has flagella and a sucking disk that enables it to hold onto the epithelial cells

Question 8

Giardia lamblia cysts Symptoms

Answer 8

most infections are asymptomatic, but heavy infections can lead to chronic diarrhea and dehydration

Question 9

Trichomonas vaginalis trophozoite

Answer 9

causative agent of trichomoniasis, an infection of the vulva and vagina. ONLY trophozoites, spread through sexual intercourse

Question 10

Plasmodium gametocyte

Answer 10

causative agent of malaria, insect and human hosts (Anopheles mosquito) when infected, organisms live in the red blood cells and liver cells eventually causing them to burst and release more organisms

Question 11

Toxoplasma gondii (not using in lab)

Answer 11

only cats can excrete the infective occysts. if someone eats or handles cat feces or eats undercooked meat

Question 12

Toxoplasma gondii symptoms

Answer 12

flu like, however in pregnant women the fetus suffers complications such as brain damage etc.