Lab 5 - Cryptosporidiosis, toxoplasmosis, besnoitiosis of cattle, sarcocystiosis (T) Flashcards
What is the size of a Cryptosporidium oocyst?
5-8 microns
Which genus has sporulated oocysts with 4 free sporozoites?
Cryptosporidium
What can we usually detect in the faeces during Sarcocystiosis in definite host/final host?
Sporocysts
What is the most frequent clinical form of Sarcocystiosis of the dog?
Subclinical
What does the human need to ingest to get infected with Sarcocystiosis?
Cystozoites
What does the human need to ingest to get infected with Sarcocystiosis?
Cystozoites
Muscle sarcosporidiosis can be found in?
Sheep, cattle, sheep, swine, horse and rabbit
Wheat-pea sized and greyish-yellow sarcocysts of … are found in the wall of esophagus?
S. gigantea (in sheep)
Intestinal Sarcosporidiosis can occur in?
Dog, cat, wild carnivores and man
What can be found in sections of vascular endothelium of heart, kidney etc. in Sarcosporidiosis?
Groups of merozoites or small schizonts
What is the Sacrocystiosis species of sheep among these following ones?
S. gigantea
What is the Sarcocystiosis species of cattle among these following ones?
S. hirsuta
What type of Sarcocystis oocyst can be found in fresh faeces?
Sporulated
What type of host of Sarcocystiosis can give the intestinal form of infection?
Final hosts – dog, cat, wild carnivores and man
Which statement is not true for Besnoitia besnoiti?
It ́s most important intermediate host is the cat. It can be transmitted by vectors, the cyst is visible
to the naked eye, develops in the endothel
Besnoitia besnoiti species are?
Obligatory heteroxenous
What animals are susceptible for Besnoitia besnoiti?
More ssp. of ruminants
What is the sign that does not appear in the chronic form of Besnoitiosis?
Itching
What method is not used to detect Toxoplasma tachyzoites during infection?
Sabin-Feldman dye test
Which genus has sporulated oocysts without sporocysts?
Cryptosporidium
What are the characteristics of Cryptosporidium meleagridis oocysts?
5 μm, spherical
Which clinical sign can be seen in dogs infected by Toxoplasma?
CNS symptoms (along with anorexia, pneumonia and diarrhea)
In which species does T. gondii cause necrotic foci and granuloma in liver, spleen, lungs and brain?
Rabbit
What is the size of Toxoplasma gondii cyst?
20-100 micrometers
What is the size of Toxoplasma cyst that contains tachyzoites?
20-100 μm
Oocyst of Toxoplasma gondii is indistinguishable from that of?
Hammondia hammondi
What is the patency period for Toxoplasmosis?
20 days
What can be found in sporulated oocysts of Toxoplasmosis?
2 sporocysts each containing 4 sporozoites
Which animals shed oocysts in Toxoplasmosis?
All species of cats as the definitive/final host
For how long does a cat pass Toxoplasma oocysts in the faeces?
1-2 weeks
What kind of host is the cat in Toxoplasma gondii?
Final Host/Definitive host
In which animal can we find Toxoplasma oocysts in the faeces?
Cats (maximum 20 days/only for 1-2 weeks)
How can we characterize the life cycle of Toxoplasma gondii?
Facultative heteroxenous
What can we find on the surface of the placenta, as a consequence of Toxoplasma infection in sheep and goat?
Yellowish/white necrotic spots
Which species does not abort when infected with Toxoplasmosis?
Cat
Which form is not characteristic of avian?
Cryptosporidiosis? Hepatic form (cryptosporidiosis has intestinal, respiratory and renal form)
Which symptom does not occur during Toxoplasmosis infection in cats?
Abortion
Which is not true?
Toxoplasma oocysts are 5-8 μm (they are 10x12 μm, cryptosporidium oocysts are 5-8μm)
Host range of Toxoplasmosis?
Cats, dogs, birds and humans and other mammals
How many sporocysts do the Toxoplasma oocysts have?
Two
Which animal species can be infected by Toxoplasma gondii?
Many mammals and birds
In which location will Cryptosporidium baileyi not establish?
Stomach
Which form of Cryptosporidiosis has the most severe outcome in broilers?
Respiratory
Which one of the following methods is perfect to stain Cryptosporidium oocysts?
Kinyoun-staining
How do we detect usually the oocysts of Cryptosporidia in faeces?
With flotation
What form of Cryptosporidium can be found in fresh faeces?
Oocysts containing 4 sporozoites
What are the characteristics of Cryptosporidium baileyi oocysts?
6-7 μm, oval
What are the clinical signs for C. baileyi?
Dyspnea and diarrhoea (also: coughing, sneezing, nasal discharges and conjunctivitis)
Which parasite are homoxenous but not host specific?
Cryptosporidium parvum
What is the causative agent of Cryptosporidiosis in mammals?
C. muris (and C. parvum, C. andersoni and C. bovis, C. felis, C. canis and C. hominis)
Which bird species are susceptible for C. bailyei infection?
Many species (especially young chickens)
Where is Cryptosporidium mainly found?
Small intestine (Ileum) or abomasum in case of C. muris and C. andersoni
Which species of Cryptosporidium occurs in birds?
C. baileyi (or C. galli or C. meleagridis)
What organ is not involved during a C. baileyi infection of poultry?
Brain (organs affected: respiratory system, small and large intestine, cloaca and bursa Fabricius
and rarely in kidneys)
What do the oocysts of Cryptosporidia contain?
4 sporozoites (no sporocysts)
Which is the method used to detect Cryptosporidium?
Kinyoun staining (also Ziehl-Neelsen, Safranin-methylene blue staining and Giemsa)
Life Cycle of Cryptosporidia parvum?
Homoxenous (via air/water/dust)
Host range of Cryptosporidium baileyi?
Anseriform
How can we characterize the host specificity of Cryptosporidia baileyi?
Euryxenous
Host range of Cryptosporidiosis?
Euryxenous (mammals and birds)
