Para Lab 5 PQs Flashcards
What is the size of a Cryptosporidium oocyst?
5 - 8 microns
Which genus has sporulated oocysts with 4 free sporozoites?
Cryptosporidium
Which genus has sporulated oocysts without sporocysts?
Cryptosporidium
What are the characteristics of Cryptosporidium meleagridis oocysts?
5 µm, spherical
Which form is not characteristic of avian Cryptosporidiosis?
Hepatic form (cryptosporidiosis has intestinal, respiratory and renal form)
Host range of Cryptosporidiosis?
Euryxenous (mammals and birds)
How can we characterize the host specificity of Cryptosporidia baileyi?
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-Neelsen, Safranin-methylene blue staining and Giemsa)
What do the oocysts of Cryptosporidia contain?
4 sporozoites (no sporocysts)
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)
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?
6-7 µm, 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 one of the following methods is perfect to stain Cryptosporidium oocysts?
Kinyoun-staining
Which form of Cryptosporidiosis has the most severe outcome in broilers?
Respiratory
In which location will Cryptosporidium baileyi not establish?
Stomach
Which animal species can be infected by Toxoplasma gondii?
Many mammals and birds
How many sporocysts do the Toxoplasma oocysts have?
2
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
Which symptom does not occur during Toxoplasmosis infection in cats?
Abortion
What can we find on the surface of the placenta, as a consequence of Toxoplasma infection 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 animals shed oocysts in Toxoplasmosis?
All species of cats as the definitive/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 indistinguishable from that of?
Hammondia hammondi
What is the size of Toxoplasma cyst that contains tachyzoites?
20-100 µm
What is the size of Toxoplasma gondii cyst?
20-100 µm
in which species does T. gondii cause necrotic foci and granuloma in liver, spleen, 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 is the sign that does not appear in the chronic form of Besnoitiosis?
Itching
What animals are susceptible for Besnoitia besnoiti?
More ssp. of ruminants
Besnoitia besnoiti species are?
Obligatory heteroxenous
Which statement is not true for Besnoitia besnoiti?
- It´s most important intermediate host is the dog. It can be transmitted by vectors, the cyst is visible to the naked eye, develops in the endothel
- 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
- It´s most important intermediate host is the cat. It can be transmitted by vectors, the cyst is not visible to the naked eye, develops in the endothel
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
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
What is the Sarcocystiosis species of cattle among these following ones?
S. hirsuta
What is the Sacrocystiosis species of sheep?
S. gigantea
What is the Sacrocystiosis species of sheep?
S. gigantea
What can be found in sections of vascular endothelium of heart, kidney etc. in
Sarcosporidiosis?
Groups of merozoites or small schizonts
Intestinal Sarcosporidiosis can occur in?
Dog, cat, wild carnivores and man
Wheat-pea sized and greyish-yellow sarcocysts of … are found in the wall of oesophagus?
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?
Subclinical
What can we usually detect in the faeces during Sarcocystiosis in definite host/final host?
Sporocysts
Cattle cryptosporidiosis is common in this age group
1 - 3 weeks
This staining method can be used to stain cryptosporidiosis
All of them
(Especially Kinyuan staining)
Avian cryptosporidiosis can cause pathological changes in this organ
Bursa Fabricii
What symptoms can be caused by toxoplasma Gandii in human
All of them
abortion, premature delivery, still-birth, mental disorders, blindness
of the new-born
Which animal is the intermediate host of toxoplasma gandii
Mammals and bird species
What symptoms can be caused by toxoplasma gandii in horse?
Neural
