Histomonas meleagridis

Question 1

DH:

Answer 1

Turkeys (mostly) and some chickens

Question 2

IH: Heterakis gallinarium (cecal nematode)

Answer 2

Heterakis gallinarium (cecal nematode)–> usually required as a paratenic/transport host via EGGGGS

Question 3

xx

Answer 3

xx

Question 4

Only sometimes is the life cycle direct, and when it is it requires _____ _____ as a paratenic host/transport host

Answer 4

Heterakis gallinarum

Question 5

Trophozoite has a cyst stage T or F

Answer 5

False – NO cyst stage

Question 6

Infectious stage for DH is

Answer 6

motile trophozoite

Question 7

Site of infections (2)

Answer 7

liver and ceca

Question 8

Route of infection

Answer 8

oral ingestion of embryonated H. gallinarum eggs

Question 9

Alternate routes of infection

Answer 9

paratenic host (transport)- bird to bird transmission (cloacal drinking)

Question 10

After ingestion, H. gallinarum eggs hatch and then what??

Answer 10

Histomonas is released into the intestine and goes systemically via blood vessels to the liver and ceca

Question 11

clinical signs

Answer 11

“Blackhead”, lethargy and stilted gate, also cyanosis

Question 12

Pathology/histology:

Answer 12

lesions all over liver and ceca