Neospora caninum and Neosporoa hughesi

Question 1

DH:

Answer 1

Domestic and wild canids

Question 2

IH

Answer 2

cattle and small ruminants

Question 3

_____ life cycle

Answer 3

indirect

Question 4

DH part of life cycle

Answer 4

• ingestion of IH tissue and digestion of sarcocysts
• Unsporulated opocysts passed in feces Sporulates outside of host
• Sporulates in 2-3 days
• Sporulated oocsyst: 2 sporocysts each with 4 sporozoites

Question 5

IH part of the life cycle

Answer 5

extraintestinal excystation to sarcocysts

Question 6

Tissue cysts can be passed via ____ in what type of life cycle?

Answer 6

Transplacentally in both DH and IH

Question 7

Infectious stage of DH

Answer 7

sarcocyst with bradyzoite

Question 8

infectious stage of IH

Answer 8

Oocyst/sporocyst

Question 9

Site of infection for DH

Answer 9

tissue cyst, ingestion, Transplacental

Question 10

Site of infection for IH

Answer 10

Oocyst ingestion, transplacental

Question 11

Clinical signs in dogs

Answer 11

Usually subclinical (asymptomatic). High seroprevalence in strays and dogs around cattle

Question 12

Clinical signs in puppies

Answer 12

euromuscular disease. Flaccid hind limb paralysis, Muscle atrophy, Difficulty swallowing

Question 13

Congenital infection =

Answer 13

asymptomatic carriers

Question 14

Clinical signs in cattle

Answer 14

abortions

Question 15

Clinical signs in calves

Answer 15

infected calves that survive are asymp. carriers or have CNS signs

Question 16

PPP

Answer 16

5-17 days

Question 17

This organism is the primary cause of what worldwide???

Answer 17

Cattle abortions

Question 18

Neosporoa hughesi – DH and IH

Answer 18

DH- unknown

IH- possibly rodents, accidental host is A HORSE*

Question 19

Neosporoa hughesi - Stages in the life cycle-

Answer 19

Transplacental, indirect, a less common cause of EPM with sarcocystic neurona being the primary cause of EPM

Question 20

____ Life cycle

Answer 20

Indirect