Apicomplexa (Hepatozoon, Crystosporidium)

Question 1

hepatozoon species with veterinary importance

Answer 1

H. canis, H. americanum

Question 2

life cycle present in vertebrate hosts

Answer 2

merogony, gametogony

Question 3

final host of H. canis

Answer 3

amblyomma maculatum

Question 4

final host of H. americanum

Answer 4

Rhipicephalus sanguineus

Question 5

predilection site of gamonts of both Hepatozoon species

Answer 5

neutrophils, monocytes

Question 6

predilection site of schizonts of both Hepatozoon species

Answer 6

endothelial cells of RE organs

Question 7

released and responsible for the production of the secondary meronts in the same target tissues

Answer 7

Macromerozoites

Question 8

invade monocytes and neutrophils and become gamonts

Answer 8

micromerozoites

Question 9

Hepatozoon species causing severe disease, fever, depression, joint pain, myositis, etc

Answer 9

H. americanum

Question 10

Hepatozoon infection severe symptoms common in young dogs or in corcurrent infection with Ehrlichia, Anaplasma, babesia or leishmania

Answer 10

H. canis

Question 11

Microscopic parasite that causes diarrheal disease “crytosporidiosis”

Answer 11

Crystosporidium

Question 12

Parasites infecting the brush border of epithelial cells of the GI tract and
respiratory tract

Answer 12

Crystosporidium

Question 13

reported crystosporidium affecting SI of calves younger than 30 days old

Answer 13

C. parvum

Question 14

reported crystosporidium affecting SI of slightly older calves about up to 1 year

Answer 14

C. ryanae

Question 15

reported crystosporidium affecting SI of adult cows

Answer 15

C. bovis

Question 16

reported crystosporidium affecting stomach of snake

Answer 16

C. serpentis

Question 17

reported crystosporidium affecting SI of mice

Answer 17

C. tyzzeri

Question 18

reported crystosporidium affecting stomach of cow

Answer 18

C. andersoni

Question 19

reported crystosporidium affecting humans

Answer 19

C. hominis

Question 20

reported crystosporidium affecting SI of poultry

Answer 20

C. meleagridis, C. baileyi

Question 21

In vertebrate host, what stage of sexual life cycle occurs?

Answer 21

merogony, gametogony

Question 22

rare in blood films but common in muscle biopsies

Answer 22

H. americanum

Question 23

sausage shaped in PMNs

Answer 23

hepatozoon gamont

Question 24

on histopathology of target tissues, it reveals what appearance (Hepatozoonosis)

Answer 24

wheel-spoke

Question 25

An onion skin cysts found in skeletal muscle of a dog infected with?

Answer 25

H. americanum

Question 26

Parasites infecting the brush border of epithelial cells of the gastrointestinal tract and respiratory tract

Answer 26

Cryptosporidium sp.

Question 27

mucosal changes are obvious in the ileum where there is stunting, swelling and eventual fusion of the villi

Answer 27

Cryptosporidium