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