cystoisospora canis

Question 1

phylum

Answer 1

apicomplexa

Question 2

order

Answer 2

eucoccidiorida- parasite of epithelial cells

Question 3

common name

Answer 3

coccidia

Question 4

hosts

Answer 4

dogs

Question 5

paratenic hosts

Answer 5

rodents

Question 6

cat species parasite

Answer 6

cystoisospora felis/ rivolta

Question 7

how many cells do unsporulated oocysts have?

Answer 7

one

Question 8

have many sporocystes are in each sporulated oocyst?

Answer 8

2 sporocysts each with 4 sporozoites

Question 9

size

Answer 9

50 micrometers

Question 10

sporulation phase

Answer 10

unsporulated oocyst pass in feces
sporulation takes place outside the host
sporulated oocysts is the infective stage

Question 11

how does a dog get infected?

Answer 11

from eating the tissues of rodents infected with asexual stages

Question 12

what are the three phases of formation?

Answer 12

sporulation, schizogony and gametogony and oocyst formation

Question 13

what is the infective stage?

Answer 13

sporulated oocyst

Question 14

what happens when a paratenic host ingest the oocyst?

Answer 14

sporozoites released invade the tissues and organs to form a cyst. when paratenic host and cysts are ingested by final host the sporozoites are released from the cyst in the final host

Question 15

what is the asexual reproduction called?

Answer 15

schizogony

Question 16

what is the sexual reproduction called?

Answer 16

gametogony and oocyst formation

Question 17

schizogony phase

Answer 17

asexual phase- definitive host becomes infected by ingesting sporulated oocyst.
each sporocyst releases 4 sporozoites
each sporozoite gives rise to a shizont containing merozoites
merozoites ruputer out of the intestinal cell, enter another cell and become another generation of shizont

Question 18

gametogony phase

Answer 18

sexual phase- merozoites give rise to male and female gametocysts. fusion and fertilization of micro and macro gametes take place and a cyst wall forms
results in a zygote , now and oocyst
unsporulated oocyst passes in feces

Question 19

what are the female gametocysts?

Answer 19

macrogametocystes- unicellular but increase in size

they have a single large nucleus

Question 20

what are the male gametocysts

Answer 20

microgametocytes- undergo repeated division to form flagellated microgametes

Question 21

PPP

Answer 21

4-11 days

Question 22

site of infection

Answer 22

small intestine

Question 23

pathogenesis

Answer 23

small intestinal cells destroyed

Question 24

clinical signs

Answer 24

asymptomatic, except young dogs have diarrhea

Question 25

diagnosis

Answer 25

fecal flotation

Question 26

treatment

Answer 26

management is critical