Exam III - Toxoplasma gondii

Question 1

Toxoplasma gondii causes abortion in what trimester of the IH’s?

Answer 1

3rd trimester in humans & warm blooded animals

Question 2

what stage is used for ID?

Answer 2

oocyst in feces

Question 3

how many sporocysts &sporozoites are found in Toxoplasma gondii?

Answer 3

2 sporocysts 4 sporozoites

Question 4

what is the site of infection for the final host of Toxoplasma gondii?

Answer 4

small intestine

Question 5

what is the site of infection for the IH of Toxoplasma gondii

Answer 5

musles liver lung and brain

Question 6

what is the pathogenisity of the IH for Toxoplasma gondii?

Answer 6

cyst is pathogenic in some organs like the brain n liver but otherwise asymtomatic

Question 7

Toxoplasma gondii can cause clinical signs in the final host if the FH is?

Answer 7

immunodificient

ie FIV or FeLV

Question 8

DX of Toxoplasma gondii is made by ?

Answer 8

serology testing or oocyte in feces.

Question 9

how many times can a cat be infected with Toxoplasma gondii and how long will the host shed eggs for?

Answer 9

once only = builds immunity with age

• egg shedding will occur for only 2 weeks

Question 10

what is the most common way for a human to become the IH of Toxoplasma gondii?

Answer 10

eating under cooked pork or lamb

Question 11

if sheep in goat become the IH for Toxoplasma gondii what is the site of infection and what is the pathology?

Answer 11

more pathogenic in these hosts and causes abortions in the sheep -with heavy infection necrosis of vital organs can be seen on necropsy

• white foci will be found on placenta and aborted fetuses