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HLW
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Facultative Parasite:
An organism that is capable of living either a free or parasitic existence
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Helminths include:
- Roundworms/nematodes (ascarids)
- Flatworms (Tapeworms/cestodes)
- Flukes/Trematodes
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Definitive Host:
Obligatory host in which parasite develops to SEXUAL maturity
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Intermediate Host:
Obligatory Host in which immature or asexual stages undergo essential development
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Paratenic/Transport Host
- No development/proliferation, just carried until reaches definitive host
- Active Carriers
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Reservoir hosts:
Population of infected hosts that serve as a source of infection for other susceptible species
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Developmental Stage of the parasite capable of initiating a new infection in a new host=
Infective Stage: Eggs, Oocytes or Larvae
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Period of time btw. infection of host and production of eggs/larvae=
Pre-patent Period
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Parasite that require an intermediate host=
Indirect Life Cycle
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Parasite that doesn't require an intermediate host=
Direct life Cycle
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Establishment of a parasite within a host=
Infection
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Establishment of a parasite on the surface of a host=
Infestation
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Protozoan Reproduciton
- Sexual (binary fission, multiple fission & budding)
- Asexual (conjunction, syngamy)
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What type of repro => oocysts?
Syngamy (sexual)
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Protozoa that infect reproductive system of cattle:
Tritrichomonas foetus (Bovine Trchomoniasis)
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Tx for Tritrichomonas foetus (Bovine Trichomoniasis):
Alcide flush SID x 7D, no Tx for 1 wk, the resume EOD
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What types of protazoa infect the GI Tract:
- Trichomonas gallinae (Avian Trichomoniasis)
- Pentatrichomonas
- Histomonas meleagridis
- Giardia lambia
- Entamoeba
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Trichomonas gallinae causes...
- Cankor in doves/pingeons
- What causes Frounce in raptors
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How is Trichomonas gallinae transmitted
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GI Dz that usually infects young birds
Trichomonas gallinae
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Protozoal Dz that infects cats, humans & cattle:
Pentatritrichomonas
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What non-pathogenic protazoa infects the mouths of dogs?
Trichomonas canistomae
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What protazoa infects the mouth of FIV, FeLV and FIP+ cats?
Tetratitrichomonas felistomae
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Economically important Dz in Range birds:
Histomoniasis meleagridis
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Clinical Signs include: ruffled feathers, hanging wings and tails, yellow droppings, black head=>
Histomoniasis meleagridis
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Zoonotic assemblages of Giardia:
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Which protazoa do not have a cyst stage
- Histomoniasis meleagridis
- Trichomonas gallinae
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Life cycle of giardia is... (Direct/Indirect)
Direct
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Clinical signs include: pancreatic insuffiency in stools, crypt atrophy, Dec Digestive enzymes, greasy, sulpher smelling stools =>
Giardia
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Tx for giardia:
- Metro (flagyl)
- Fenbendazole (panacure) in dogs/cats
- Drontal
- Giardia
- Albendazole
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Tritrichomonas, Subphylum: ____ Family: _____
- Subphylum: Mastigophora
- Family: Trichomonadidae
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Histomonas, Subphylum: ____ Family: _____
- Subphylum: Mastigophora
- Family: Monoceromonadidae
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Giardia lamlia, Subphylum: ____ Family: _____
- Subphylum: Diplomonadida
- Family:Hexamitidae
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Entamoeba, Subphylum: ____ Family: _____
- Subphylum: Sarcodina
- Family: Endamoebidae
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