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Vet Pathology - Flashcards

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Class:VET 101 - Intro to Veterinary Techology
Subject:Veterinary Technology
University:Volunteer State Community College
Term:Fall 2012
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Internal Parasites live with in the host; derive nutrition and protection
Definitive Host Host that harbors adult, mature or sexual stages
Diagnostic stage stage of parasite that is detectable through diagnostic procedures
Prepatent period (PP) time elapsed between initial infection with parasite until  the infection can be detected by using common diagnostic procedures.
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Protozoa Unicellular, or one cell, organisms, some of which may be parasitic in domestic animals and can Infect a variety of tissues. Detected mostly in blood or feces. Life cycle - simple or complex.
Hemoprotozoa most are found in erythrocytes (RBC0 within a stained blood smear. Ticks usually serve as intermediate hosts and transmit to definitive host
Babesia begemine
Babesia begemine is a tear-shaped or pear-shaped hemoprotozoan found within the RBCs of infected cattle.

transmitted by Boophilus annulatus
Trypanosomes extracellular and "swim" within the blood and is transmitted by blood feeding arthropods
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Flukes Also known as Trematodes are flatworms with unsegmented, leaf-shaped bodies.
Trematodes Most found in GI, liver, or lung, lay eggs with operculum & passed in feces.
 Larval stage exits operculum- 1st interim host snail where it develops then the cercariae stage exits snail- enters definitive host it may develop into a metacercaria and encyst on vegetation to be ingested may be injested by the 2nd intermediate host and become metacercaria then ingested by definitive host or may directly penetrate skin of definitive host.
Tapeworm Also known as Cestodes and are also flatworms
Cestodes
  • Segmented flatworms- proglotids behind the head which is attached to the host's intestine, hermaphrodites
  • Proglotides are released & are filled with eggs, which are ingested by intermediate host.
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Roundworms Also known as Nematodes and one of the most important groups of parasites in veterinary parasitology found in almost any tissue of domestic species. Have a diverse, complicated life cycles with a male & female worm, that lay eggs.
Roundworms Toxocara canis
Hookworms Ancylostoma caninum
Thorny-Head Worms Also known as Acanthocephalans and is an uncommon parasites with a complicated life cycle and separate sexes. They do not have a true gut but they absorb nutrients through their body wall.
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Spirocerca Lupi esophagus worm, ID eggs in feces- thick shelled paperclip shape embryonated —  30-38 x 11-15 mcm

Toxocara canis Toxocara cati Toxascaris leonina roundworm of dogs & cats; eggs- 75.90 mcm, spherical with deeply pigmented center & a round pigmented outer shell; PP- canis 21-35 days & T. leonina 74 days.

Nematode
Ancylostoma caninum  a canine hookworm

Nematode
Ancylostoma tubaeforme a feline hookworm

Nematode
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Ancylostoma braziliense a canine and feline hookworm

Nematode
Strongyloides stercoralis & Tumefacien GI threadworm

Only female parasite- lays eggs that hatch in the intestine; the prepatent period is 8 to 14 days

Nematode
Trichuris vulpis whipworm; egg-thick , yellow-brown symmetric shell with polar plugs at both ends-—  70-89 x 37-40 mcm

Nematode 

 

Taenia taeniaeformis Feline tapeworm; mice and rats are intermediate host

Cestodes

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Platynosomum fastosum Lizard poisoning fluke of cats; egg

Trematodes
Nanophyetus salmincola salmon poisoning fluke of dogs in Pacific Northwest; eggs- unembryonated with distinct operculum and small blunt point at opposite end

Termatodes
Alaria Intestinal flukes of dogs and cats; eggs-large, golden brown, and operculated

Trematodes
Isospora are protozoan parasites of the small intestine of both dogs and cats. They produce a clinical syndrome known as coccidiosis, one of the most commonly diagnosed protozoan diseases in puppies and kittens. PP-varies form 7-14 days
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Toxoplasma gondii Intestinal coccidian of cats; oocysts in feces, PP 5-24 days (depends on route of infection)

protozoans
Cryptosporidium species sporulated oocysts in feces 4-6mcm; zoonotic potential

Protozoans
Sarcocyst oocyst is sporulated when passed in the feces.

Protozoans
Giardia flagellated protozoans; occurs in 2 stages- motile feeding stage (trophozoite) 7 resistant cyst stage; trophozoite- pear shaped & dorsoventrally flattened, with 4 pairs of flagella, 2 nuclei & prominent adhesive dick, cyst-ova with refractile wall & 4 nuclei.

Protozoans
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Dirofilaria immitis canine heartworm, also parasitizes cats & ferrets; adults found in right ventricle and pulmonary artery; PP-6 months; microfilaria- is 1st stage larva that circulate in blood vessels.

Nematodes
Babesia canis intracellular RBC parasite of dogs; dx-obseving basophilic, pear shaped trophozoites in RBC on stained smears.

Protozoan
Cytauxzoon felis intracellular RBC parasite of cats; ID ring form in stained blood smears

Protozoan
Hepatozoon Canis Hepatozoon americanum intracellular leukocyte parasite of dogs; forms-schizonts & gamonts

Protozoan

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Linguatula serrate tongueworm of dogs; and inside is mite like larval stage with its jointed claws.

Pentastomids
Dog & Cats respiratory
Dog & Cats respiratory Aelurostrongylus abstrusus cat lungworm; recover larvae from fecal floatation of tracheal wash

Nematodes
Dog& Cats respiratory
Dog and Cats respiratory Filaroides osleris,Filaroides hirthi, filaroides milksi canine lungworm; PP-none (first stage larvae infective to definitive host) to 10 weeks; dx-larvae on fecal float or observed by endoscope

Nematodes
Eucoleus aerophilus (Capillaria aerophila) PP- 40days; dx-eggs on fecal float- like Trichuris but smaller, more broadly barrel shaped, & lighter in color with smoother outer surface

Nematodes
Dogs&Cats respiratory
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Dog & Cats respiratory Paragonimus kellicottie lung fluke of dogs; dx eggs in sputum of feces; eggs-yellowish-brown with operculum; PP- 30-36 days

Trematodes
Dogs& Cats respiratory
Parasites-Dogs&Cats Urogenital-Nematodes
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 Internal Parasiteslive with in the host; derive nutrition and protection
 Definitive HostHost that harbors adult, mature or sexual stages
 Diagnostic stagestage of parasite that is detectable through diagnostic procedures
 Prepatent period (PP)time elapsed between initial infection with parasite until  the infection can be detected by using common diagnostic procedures.
 ProtozoaUnicellular, or one cell, organisms, some of which may be parasitic in domestic animals and can Infect a variety of tissues. Detected mostly in blood or feces. Life cycle - simple or complex.
 Hemoprotozoamost are found in erythrocytes (RBC0 within a stained blood smear. Ticks usually serve as intermediate hosts and transmit to definitive host
 Babesia begemine
Babesia begemine is a tear-shaped or pear-shaped hemoprotozoan found within the RBCs of infected cattle.

transmitted by Boophilus annulatus
 Trypanosomesextracellular and "swim" within the blood and is transmitted by blood feeding arthropods
 FlukesAlso known as Trematodes are flatworms with unsegmented, leaf-shaped bodies.
 TrematodesMost found in GI, liver, or lung, lay eggs with operculum & passed in feces.
 Larval stage exits operculum- 1st interim host snail where it develops then the cercariae stage exits snail- enters definitive host it may develop into a metacercaria and encyst on vegetation to be ingested may be injested by the 2nd intermediate host and become metacercaria then ingested by definitive host or may directly penetrate skin of definitive host.
 TapewormAlso known as Cestodes and are also flatworms
 Cestodes
  • Segmented flatworms- proglotids behind the head which is attached to the host's intestine, hermaphrodites
  • Proglotides are released & are filled with eggs, which are ingested by intermediate host.
 RoundwormsAlso known as Nematodes and one of the most important groups of parasites in veterinary parasitology found in almost any tissue of domestic species. Have a diverse, complicated life cycles with a male & female worm, that lay eggs.
 RoundwormsToxocara canis
 HookwormsAncylostoma caninum
 Thorny-Head WormsAlso known as Acanthocephalans and is an uncommon parasites with a complicated life cycle and separate sexes. They do not have a true gut but they absorb nutrients through their body wall.
 Spirocerca Lupiesophagus worm, ID eggs in feces- thick shelled paperclip shape embryonated —  30-38 x 11-15 mcm

 Toxocara canis Toxocara cati Toxascaris leoninaroundworm of dogs & cats; eggs- 75.90 mcm, spherical with deeply pigmented center & a round pigmented outer shell; PP- canis 21-35 days & T. leonina 74 days.

Nematode
 Ancylostoma caninum a canine hookworm

Nematode
 Ancylostoma tubaeformea feline hookworm

Nematode
 Ancylostoma braziliensea canine and feline hookworm

Nematode
 Strongyloides stercoralis & TumefacienGI threadworm

Only female parasite- lays eggs that hatch in the intestine; the prepatent period is 8 to 14 days

Nematode
 Trichuris vulpiswhipworm; egg-thick , yellow-brown symmetric shell with polar plugs at both ends-—  70-89 x 37-40 mcm

Nematode 

 

 Taenia taeniaeformisFeline tapeworm; mice and rats are intermediate host

Cestodes

 Platynosomum fastosumLizard poisoning fluke of cats; egg

Trematodes
 Nanophyetus salmincolasalmon poisoning fluke of dogs in Pacific Northwest; eggs- unembryonated with distinct operculum and small blunt point at opposite end

Termatodes
 AlariaIntestinal flukes of dogs and cats; eggs-large, golden brown, and operculated

Trematodes
 Isosporaare protozoan parasites of the small intestine of both dogs and cats. They produce a clinical syndrome known as coccidiosis, one of the most commonly diagnosed protozoan diseases in puppies and kittens. PP-varies form 7-14 days
 Toxoplasma gondiiIntestinal coccidian of cats; oocysts in feces, PP 5-24 days (depends on route of infection)

protozoans
 Cryptosporidium speciessporulated oocysts in feces 4-6mcm; zoonotic potential

Protozoans
 Sarcocystoocyst is sporulated when passed in the feces.

Protozoans
 Giardiaflagellated protozoans; occurs in 2 stages- motile feeding stage (trophozoite) 7 resistant cyst stage; trophozoite- pear shaped & dorsoventrally flattened, with 4 pairs of flagella, 2 nuclei & prominent adhesive dick, cyst-ova with refractile wall & 4 nuclei.

Protozoans
 Dirofilaria immitiscanine heartworm, also parasitizes cats & ferrets; adults found in right ventricle and pulmonary artery; PP-6 months; microfilaria- is 1st stage larva that circulate in blood vessels.

Nematodes
 Babesia canisintracellular RBC parasite of dogs; dx-obseving basophilic, pear shaped trophozoites in RBC on stained smears.

Protozoan
 Cytauxzoon felisintracellular RBC parasite of cats; ID ring form in stained blood smears

Protozoan
 Hepatozoon Canis Hepatozoon americanumintracellular leukocyte parasite of dogs; forms-schizonts & gamonts

Protozoan

 Linguatula serratetongueworm of dogs; and inside is mite like larval stage with its jointed claws.

Pentastomids
Dog & Cats respiratory
 Dog & Cats respiratory Aelurostrongylus abstrususcat lungworm; recover larvae from fecal floatation of tracheal wash

Nematodes
Dog& Cats respiratory
 Dog and Cats respiratory Filaroides osleris,Filaroides hirthi, filaroides milksicanine lungworm; PP-none (first stage larvae infective to definitive host) to 10 weeks; dx-larvae on fecal float or observed by endoscope

Nematodes
 Eucoleus aerophilus (Capillaria aerophila)PP- 40days; dx-eggs on fecal float- like Trichuris but smaller, more broadly barrel shaped, & lighter in color with smoother outer surface

Nematodes
Dogs&Cats respiratory
 Dog & Cats respiratory Paragonimus kellicottielung fluke of dogs; dx eggs in sputum of feces; eggs-yellowish-brown with operculum; PP- 30-36 days

Trematodes
Dogs& Cats respiratory
 Parasites-Dogs&Cats Urogenital-Nematodes
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