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• Ectoparasites


  Parasites that live on the surface of the host
• Endoparasites


  Parasites that live inside the host
• Obligate parasite


  A parasite that can only live on or in a host
• Facultative parasite

  A parasite that can live both on/in a host and independently
• Permanent parasite


  A parasite that lives continuously on the host
• Intermittent parasite


  A parasite that only feeds on the host and leaves
• Definitive host


  The host in which the parasite reaches maturity
• Paratenic host


  A host in which some development of the parasite occurs but it does not reach maturity
• Intermediate host


  A host in which the parasite undergoes necessary development
• Transport host


  A host that carries the parasite from one place to another but does not support its development
• Hyperparasitism


  A condition where parasites host other parasites
• Bovine trichomoniasis is a disease whose main mode of transmission is not through coitus
• Eimeria subepithelialis is a coccidian species that does not occur extraintestinally
• Trypanosoma equiperidum


  A trypanosoma species that does not require a vector for transmission
• Isospora spp. and Wenyonella spp. are coccidia whose sporulated oocysts do not have sporocysts
• Sarcocystis cruzi


  The most pathogenic Sarcocystis spp. affecting cattle
• Eimeria bovis and Cryptosporidium bovis


  The two most pathogenic coccidia affecting cattle
• Glossina morsitans is not a principal vector of Trypanosoma cruzi
• Trypanosoma evansi


  Transmitted mechanically by the contaminated mouthparts of horseflies
• Methods for controlling trypanosomosis under field conditions

  • Destruction of game
  • Genetic improvement
  • Breeding of trypanosome-resistant cattle
  • Chemotherapy
• Diagnosis of acute trypanosomosis

  Demonstration of the trypomastigote stage in thick blood films
• Babesia bigemina


  Cattle are the definitive host
• Babesia


  Minute, usually paired, piriform parasites of the RBC of mammals
• Plasmodium is not transmitted by ticks
• Toxoplasma gondii


  Cats are the definitive host
• Toxoplasma oocyst


  Contains 4 sporozoites
• Toxoplasma oocyst


  Contains 2 sporocysts
• Plasmodium


  Etiological agents of malarias of man, nonhuman primates, rodents, birds and reptiles
• Eimeria tenella


  One of the most common pathogenic coccidia of domestic poultry
• Surra is less pathogenic and may be asymptomatic for months in elephants
• Mal de caderas


  Caused by Trypanosoma equinum
• Leishmania life cycle in fly gut

  Promastigote form
• Ehrlichia canis


  Cause of canine ehrlichiosis or tropical canine pancytopenia, found in monocytes
• Aegyptianella pullorum


  Cause of "Nopi" or "Nofel" in West Africa, characterized by fever, anorexia, incoordination, and enlargement of lymph nodes
• Haemobartonella


  Obligate prokaryotic parasites that occur on or within erythrocytes of many species, bacilli-form or coccoid in chains
• Deep skin scrapings are required to find Demodex mites
• Demodicosis is the least likely cause of a non-healing wound on the thorax of a cat
• Adult-onset demodicosis in dogs usually stems from an untreated or unrecognized case of juvenile demodicosis
• Larval ticks are not responsible for tick paralysis
• Argas persicus is not associated with tick paralysis