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</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</p> Signup and view all the answers

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

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

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

    <p>Tick</p> Signup and view all the answers

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

    <p>Ixiodes</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</p> Signup and view all the answers

    Which protozoan genus is associated with causing human babesiosis?

    <p>Babesia</p> Signup and view all the answers

    Which Apicomplexa parasite is known to infect pigs?

    <p>Neospora</p> Signup and view all the answers

    What is the diagnostic feature of many Apicomplexa parasites?

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

    Which parasite is transmitted by ticks and infects blood cells?

    <p>Hepatozoon</p> Signup and view all the answers

    What is the characteristic mode of locomotion for Apicomplexa parasites?

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

    Which Apicomplexa parasite is known to cause disease in dolphins?

    <p>Babesia</p> Signup and view all the answers

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

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

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

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

    What is the definitive host for Merocystis kathae?

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

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

    <p>Histomonas</p> Signup and view all the answers

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

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

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

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

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