Equine Protozoal Myeloencephalitis and Sarcocystis neurona in Horses

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Questions and Answers

Which of the following is NOT a characteristic of Sarcocystis neurona?

  • It has a sexual phase in its life cycle (correct)
  • It is the causative agent of equine protozoal myeloencephalitis
  • It is present only in the Americas
  • It can lead to muscle atrophy and ataxia in horses

Which of the following is the true intermediate host for Sarcocystis neurona?

  • Horses
  • Cats
  • Birds
  • Opossums (correct)

What is the main mode of transmission for Babesia microti, the causative agent of Texas cattle fever?

  • Tick vectors (correct)
  • Ingestion of contaminated water
  • Biting insects
  • Direct contact with infected cattle

Which of the following is a key characteristic of Apicomplexa, the phylum to which Sarcocystis neurona and Babesia microti belong?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary function of the cyst stage in the life cycle of Apicomplexa parasites like Sarcocystis neurona?

<p>Both a and b (C)</p> Signup and view all the answers

What is the primary etiological agent of human babesiosis in the United States?

<p>Babesia microti (C)</p> Signup and view all the answers

Which host is the definitive host in the life cycle of Babesia microti?

<p>Tick (A)</p> Signup and view all the answers

What is the genus of the tick involved in the Babesia microti life cycle?

<p>Ixiodes (D)</p> Signup and view all the answers

What is the significant tick-borne disease caused by various species from the protozoan genus Babesia?

<p>Canine babesiosis (B)</p> Signup and view all the answers

Which protozoan genus is associated with causing human babesiosis?

<p>Babesia (A)</p> Signup and view all the answers

Which Apicomplexa parasite is known to infect pigs?

<p>Neospora (A)</p> Signup and view all the answers

What is the diagnostic feature of many Apicomplexa parasites?

<p>A cyst stage (C)</p> Signup and view all the answers

Which parasite is transmitted by ticks and infects blood cells?

<p>Hepatozoon (B)</p> Signup and view all the answers

What is the characteristic mode of locomotion for Apicomplexa parasites?

<p>Gliding motility (D)</p> Signup and view all the answers

Which Apicomplexa parasite is known to cause disease in dolphins?

<p>Babesia (B)</p> Signup and view all the answers

Which of the following is a characteristic feature of Apicomplexan parasites?

<p>They are obligate intracellular parasites (C)</p> Signup and view all the answers

Which of the following is a protozoan parasite that can cause neurological disease in horses?

<p>Sarcocystis neurona (A)</p> Signup and view all the answers

Which of the following statements about Babesia microti is correct?

<p>It is an intracellular parasite that causes babesiosis in humans (B)</p> Signup and view all the answers

Which of the following statements about the life cycle of Apicomplexan parasites is correct?

<p>Fusion of micro- and macrogamonts leads to the formation of a zygote (C)</p> Signup and view all the answers

Which of the following statements about protozoan parasites is correct?

<p>They are traditionally grouped based on their methods of movement and feeding (D)</p> Signup and view all the answers

What type of reproduction is exhibited by the protozoan parasite Merocystis kathae in scallops?

<p>Asexual reproduction (B)</p> Signup and view all the answers

What is the definitive host for Merocystis kathae?

<p>Common whelk (B)</p> Signup and view all the answers

Which of the following protozoan genera is known to cause disease in poultry?

<p>Histomonas (A)</p> Signup and view all the answers

Which human disease is caused by the protozoan parasite Trypanosoma cruzi?

<p>Chagas disease (D)</p> Signup and view all the answers

What is the colloquial term for traveler's diarrhea contracted in Mexico?

<p>Montezuma's revenge (C)</p> Signup and view all the answers

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