Protozoa - Coccidia of Horse, cattle, pig and carnivores Flashcards
Coccidiosis of cattle species
E. zuernii E. bovis E. ellipsoidalis E. alabamensis E. auburnensis
Which Eimeria spp. is highly pathogenic in cattle?
E. zuernii
E. bovis
Which Eimeria spp. is found in cattle?
E. bovis and E. zuernii are the most pathogenic in cattle
Which Eimeria sp. may have a high pathogenicity similar to E. zuernii? (?)
E. alabamensis According to notes, the following have similar pathogenicity in cattle: E. zuernii – E. bovis (most) E. alabamensis – E. aubernensis E. ellipsoidalis (least)
Coccidiosis of horse species
E. leuckarti – Small intestine
What characteristic lesion of Horse coccidiosis in small intestine?
Catarrhal-inflammatory changes
Cause of Horse coccidiosis?
E. leuckarti
What type of oocyst is E. leuckarti?
80 um, piriform, (thick, dark brown wall and large micropyle)
Cause of coccidiosis in sheep
E. ovinoidalis (most pathogenic) E. bakuensis E. crandallis E. parva E. ahsata
Cause of coccidiosis in goat
E. ninakohlyakimovae (most pathogenic)
E. arloingi
E. christenseni
E. caprina
Sheep Eimeria spp. and what it causes in the intestine:
Generally catarrh more or less evident.
E. ovinoidalis, E. crandallis, E. parva
Diffuse hyper-plasia and thickening of the wall of the caecum (occasionally of the colon), with necrosis, roughness, and small haemorrhages on the mucosal surface.
E. baukuensis, (E. arloingi - Goat) Greyish-white, flat/protuberant hyper-plastic nodules. Occasionally 4-7 mm polyp-like growths (enlarged villi) in the posterior small intestine: Nest of gamonts, many oocysts.
Cause of liver coccidiosis in rabbits
E. stiedai
Cause of intestinal coccidiosis of rabbit
E. intestinal E. flavescens E. piriformis E. magna E. irresidua E. perforans E. media E. exigua E. veydovskyi E. caecicola
Which of the highly pathogenic Eimeria species is in right location?
E. flavescens in caecum
Which of the following is correct?
E. irresidua – Jejunum
Rabbit coccidiosis:
Small intestine x3 E. intestinalis E. magna E. irresidua
Large intestine x2 E. flavescens E. piriformis
Cause of coccidiosis of pig
E. deblicki E. polita E. scabra E. spinosa (non-pathogenic) Isospora suis (pathogenic)
What is not characteristic during Pig coccidiosis?
Haemorrhagic enteritis
Where are the lesions caused by Isospora suis mostly situated?
Jejunum
Which genus has sporulated oocysts with 2 sporocysts?
Isospora
Sporulated Isospora oocysts contain 2 sporocysts, and 4 sporozoites in each, with a wall without micropyle, containing neither oocyst residual body nor Stieda body
Cause of coccidiosis in dog
Isospora canis
I. ohioensis
I. burrowsi
Cause of coccidiosis in cat
Isospora felis
I. rivolta
Difference between Isospora and Eimeria?
Only Eimeria has cap, micropyle, and residual bodies
Difference between Neospora and Isospora?
Isospora do not have microcpyle in wall. Isospora oocysts do not have residual or stieda body.
If Eimeria oocysts are recognised in Dog faeces, then: (?)
Belong to dogs as hosts, no pathological significance
Pseudoparasites
If Dog passes Eimeria in faeces (are detectable):
Not diagnostic
Since in carnivores:- Healthy animal may also shed oocysts.
With diarrhoea and copious oocyst shedding, other causative agents should be considered.
Coccidia from consumed prey animals (rodents) may pass with the faeces (pseudo-parasites)
Dog coccidiosis:
Host specific, homoxenous parasites (with paratenic host only!)
Which species does not have Eimeria spp.?
Carnivores (have Isospora spp.)
Which is the most usual form of biliary coccidiosis in rabbit?
A: Symptomless
B: Acute
C: Chronic
D: Mild, subclinical
A: symptomless
What organ is affected by bovine coccidiosis? A: Whole digestive tract B: Small intestines C: Jejunum D: Large intestines
D: Large intestines
What size is the oocyst of Isospora suis?
A: About 5 micrometers
B: About 10 micrometers
C: About 20 micometers
D: About 50 micometers
C: About 20 micometers
How can we increase the sensitivity of detection of I. suis oocyst in the
microscope?
A: With autofluorescence
B: With flotation
C: With direct examination
D: With sporulation
A: With autofluorescence
Where are the pathologic lesions that occur in case of I. suis infection?
A: In cecum and ileum B: in duodenum
C: In caecum and colon
D: In stomach
A: In cecum and ileum
What does the hepatic lesions contains in case of Eimeria infection?
A: Merozoites
B: Gamonts and oocysts
C: Sporozites
D: Sporulated oocysts
B: Gamonts and oocysts
Which are the larges among the following ones?
A: Neospora caninum B: Sarcocystis
C: I. burrowsi
D: I. felis
D: I. felis
What is the worst consequence of pig coccidiosis?
A: Bleeding in the lumen of intestines
B: Diarrhoea
C: Catarrhal enteritis D: Dehydration
D: Dehydration
Diarrhoea caused by coccidiosis last for…in puppy.
A: 1-2 days
B: 1-2 weeks
C: 1 year
D: 3-5 weeks
B: 1-2 weeks
Diarrhoea caused by coccidiosis last for…in kittens.
A: 1-2 days
B: 1-2 weeks
C: 1 year
D: 3-5 weeks
A: 1-2 days
Which species can infect cats?
A: I. canis
B: E. felis
C: I. rivolta
D: I. ohioensis
C: I. rivolta
Which species can infect dog?
A: I. canis
B: E. stiedai
C: I. felis
D: E. canis
A: I. canis
What symptom is not caused by I. felis in cat?
A: Diarrhoea
B: Anaemia
C: Exsiccosis
D: Miocarditis
D: Miocarditis
What symptom is not caused by I. canis in dog?
A: Diarrhoea
B: Anaemia
C: Exsiccosis
D: Miocarditis
D: Miocarditis
What symptom is caused by I. suis in young pig?
A: Diphtheric membrane in the mouth
B: Necrotic lesions in the liver
C: Myocarditis
D: Diarrhoea
D: Diarrhoea
What symptom is caused by E. stiedai in rabbit?
A: Diphtheric membrane in the mouth
B: Necrotic lesions in the liver
C: Cholangitis
D: Anaemia
C: Cholangitis
Which species has the biggest oocyst in dogs? A: I. canis B: I. ohioensis C: I. canideal D: I. burrowsi
A: I. canis
What age of cattle is the most susceptible for Eimeria infection?
A: 2-5 months old
B: In 10-12 months
C: 1-2 years
D: After weaning
A: 2-5 months old
Which species affects the large intestines in rabbit?
E. flavescens
From what species do we not need to distinguish Isospora felis oocyst samples?
I. ohioensis
Which species has pinhead-sized nodules in the ileum?
E. magna
Who is infected by E. stiedai?
Other
Rabbit
Which species affects the cattle?
E. zuernii
What does a sporulated oocyst of E. stiedai contain?
Sporocyst
What species of Eimeria can appear as a merozoite in the bloody faeces?
E. zuernii
What kind of extra-intestinal symptoms can occur during Eimeria infection in
calves?
CNS signs
In which species can you find E. intestinalis?
Rabbit
What can you find in fresh faeces?
Unsporulated oocysts
Coccidiosis infects pigs at what age?
8-15 days
What is affected in coccidiosis of carnivores?
Small intestine
What does the sporulated oocyst of E. stiedai contain?
4 sporocysts each containing 2 sporozoites
Which species of Eimeria can appear as merozoites in bloody faces?
E. zuernii of cattle
How many macrogametes develop from 1 micro-gamont?
21-30
How do you detect E. zuernii in the faeces?
Flotation test
Species of Eimeria found in the large intestine of the rabbit?
E. piriformis and E. flavescens
What is an unsporulated oocyst with regards to Eimeria?
Zygote
Which are the small intestine Eimeria species in the rabbit?
E. intestinalis, E. magna, E. irresidua
How do we detect an unsporulated Eimeria oocyst?
Flotation method
What do we see clinically when a rabbit has E. steidai?
Usually a sub-clinical infection
What form of oocysts can be found in the fresh faeces on the course of
E. stedai infection?
Unsporulated
Which animal can be infected by E. intestinalis?
Rabbit
What form of Eimeria zuernii might appear sometimes in mucous faeces of
calves?
Schizonts or meroziotes
At what age are rabbits most susceptible for intestinal Eimeria infection?
1-2 months
Where does the sporogony of Eimeria zuernii take place?
In the external environment
Where do calves usually get heavy infection with Coccidiosis?
In the feed lots and yards
Which method is used for courting oocysts in the faces during an Eimeria
infection?
McMaster method
What is found in the faeces of animals infected by Eimeria?
Sporulated oocysts
What is unsporulated?
Zygote
