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Tissue Cyst Forming Coccidian Flashcards (view source)
Revision as of 23:17, 9 April 2010
, 23:17, 9 April 2010Created page with '<FlashCard questions="13"> |q1=What are the two main species of ''Neospora'' of veterinary interest and which animals do they affect? |a1= *N. caninum **Dogs *N. hughesi **Horses…'
<FlashCard questions="13">
|q1=What are the two main species of ''Neospora'' of veterinary interest and which animals do they affect?
|a1=
*N. caninum
**Dogs
*N. hughesi
**Horses
|l1=Neospora
|q2=How long is the prepatent period of ''Neospora''?
|a2=5 days
|l2=Neospora
|q3=What are the clinical signs of ''Neospora'' infections in dogs?
|a3=
*Ascending paralysis
*Sudden collapse due to myocarditis
*Muscle wasting
|l3=Neospora
|q4=What are the clinical signs of ''Neospora'' infections in cattle?
|a4=
*Abortion
*Encephalomyelitis
*Paresis
|l4=Neospora
|q5=What are the clinical signs of ''Neospora'' infections in horses?
|a5=Myeloencephalitis
|l5=Neospora
|q6=How many intermediate and final hosts does ''Sarcocystis'' have?
|a6=
*One final host
*One intermediate host
|l6=Sarcocystis
|q7=True or False: ''Sarcocystis'' infections are mainly asymptomatic
|a7=True
|l7=Tissue cyst-forming coccidia#Sarcocystis
|q8=What is Equine protozoal myeloencephalitis?
|a8=
*Necrotising encephalomyelitis affecting the grey and white matter of the CNS
*Caused by S. neurona
*Causes spinal cord dysfunction leading to ataxia and paralysis
|l8=Sarcocystis
|q9=What is the most pathogenic species of ''Toxoplasma''?
|a9=T. gondii
|l9=Toxoplasma
|q10=True or False: The life cycle of ''Toxoplasma'' is direct
|a10=
*False
*The life cycle is complex
*Described as facultatively heterozygous
|l10=Toxoplasma
|q11=Describe the acute phase of ''Toxoplasma'' infections
|a11=
*Asexual reproduction in the cell by endodyogeny (budding) producing 8-16 tachyzoites
*Tachyzoites are released when host cell bursts
*Haematogenous spread as more cells are infected
*Infection continues until the animal develops immunity (around 2 weeks) at which point the infection enters the chronic phase
|l11=Toxoplasma
|q12=Describe the chronic phase of ''Toxoplasma'' infections
|a12=
*Slow growing intracellular bradyzoites become walled off forming infective cysts
*Bradyzoites are protected from the host immune response (whereas extracellular tachyzoites are killed)
*Cysts remain viable for months to years in muscle and nervous tissue
*If immunity is suppressed the infection can revert to the acute form
|l12=Toxoplasma
|q13=How can ''Toxoplasma'' infections be prevented?
|a13=
*ELISA to check for seropositive cats
*Humans can avoid oocyst ingestion
*Humans can avoid tissue cyst ingestion
*Sheep can be vaccinated or given medicated feed
|l13=Toxoplasma
</FlashCard>[[Category:Tissue_Cyst_Forming_Coccidia]][[Category:Flashcards]]
|q1=What are the two main species of ''Neospora'' of veterinary interest and which animals do they affect?
|a1=
*N. caninum
**Dogs
*N. hughesi
**Horses
|l1=Neospora
|q2=How long is the prepatent period of ''Neospora''?
|a2=5 days
|l2=Neospora
|q3=What are the clinical signs of ''Neospora'' infections in dogs?
|a3=
*Ascending paralysis
*Sudden collapse due to myocarditis
*Muscle wasting
|l3=Neospora
|q4=What are the clinical signs of ''Neospora'' infections in cattle?
|a4=
*Abortion
*Encephalomyelitis
*Paresis
|l4=Neospora
|q5=What are the clinical signs of ''Neospora'' infections in horses?
|a5=Myeloencephalitis
|l5=Neospora
|q6=How many intermediate and final hosts does ''Sarcocystis'' have?
|a6=
*One final host
*One intermediate host
|l6=Sarcocystis
|q7=True or False: ''Sarcocystis'' infections are mainly asymptomatic
|a7=True
|l7=Tissue cyst-forming coccidia#Sarcocystis
|q8=What is Equine protozoal myeloencephalitis?
|a8=
*Necrotising encephalomyelitis affecting the grey and white matter of the CNS
*Caused by S. neurona
*Causes spinal cord dysfunction leading to ataxia and paralysis
|l8=Sarcocystis
|q9=What is the most pathogenic species of ''Toxoplasma''?
|a9=T. gondii
|l9=Toxoplasma
|q10=True or False: The life cycle of ''Toxoplasma'' is direct
|a10=
*False
*The life cycle is complex
*Described as facultatively heterozygous
|l10=Toxoplasma
|q11=Describe the acute phase of ''Toxoplasma'' infections
|a11=
*Asexual reproduction in the cell by endodyogeny (budding) producing 8-16 tachyzoites
*Tachyzoites are released when host cell bursts
*Haematogenous spread as more cells are infected
*Infection continues until the animal develops immunity (around 2 weeks) at which point the infection enters the chronic phase
|l11=Toxoplasma
|q12=Describe the chronic phase of ''Toxoplasma'' infections
|a12=
*Slow growing intracellular bradyzoites become walled off forming infective cysts
*Bradyzoites are protected from the host immune response (whereas extracellular tachyzoites are killed)
*Cysts remain viable for months to years in muscle and nervous tissue
*If immunity is suppressed the infection can revert to the acute form
|l12=Toxoplasma
|q13=How can ''Toxoplasma'' infections be prevented?
|a13=
*ELISA to check for seropositive cats
*Humans can avoid oocyst ingestion
*Humans can avoid tissue cyst ingestion
*Sheep can be vaccinated or given medicated feed
|l13=Toxoplasma
</FlashCard>[[Category:Tissue_Cyst_Forming_Coccidia]][[Category:Flashcards]]