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Exam 1
Protozoal/parasitic intestinal dz
27
Veterinary Medicine
Professional
01/27/2017

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Cards

Term
What is the common name for histomoniasis?
Definition
-blackhead
Term
What organism is responsible for blackhead?
Definition
-Histomonas meleagridis inside Heterakis gallinarum (cecal worm) inside earthworms
Term
Which species is most commonly affected by blackhead?
Definition
-turkeys
Term
What lesions do we see due to balckhead in turkeys?
Definition
-typhitis w/ cecal thickening and fibrinonecrotic debris in the lumen
-target-shaped necrotic foci are also seen in the liver
Term
What lesions and clinical signs do we see with coccidial infections?
Definition
-malabsorptive diarrhea due to villous atrophy
-exudative enteritis and colitis due to epi erosion and ulceraiton
Term
What are the two major species of coccidia? Which species are affected by each?
Definition
-Eimeria and isospora
-Eimeria: calves, sheep and goats
-Isospora: pigs
Term
Which agegroup of cattle is most often affected by intestinal Eimeria?
Definition
-calves
Term
What are the clinical signs of intestinal cocidiosis in cattle?
Definition
-diarrhea, possible with mucus and tenesmus
Term
What lesions do we see with intestinal coccidiosis in calves?
Definition
-necrohemmorrhagic enteritis
-fibrinohemorrhagic typhlocolitis
-congestion and edema of mucosa
Term
Which sheep and goats are most comonly affected by intestinal coccidiosis?
Definition
-young animals
Term
What lesions do we see with intestinal coccidiosis in young sheep and goats?
Definition
-edema and thickening of ileum, cecum, and colon
-numerous pale and slightly raised foci in SI mucosa
Term
Which specific Isospora affects pigs?
Definition
-Isospora suis
Term
Which age of pigs are most commonly affected by Isospora suis?
Definition
-piglets from 5-6d to 2-3w of age
Term
What lesions do we see due to intestianl coccidiosis in neonatal pigs?
Definition
-fibrinous or fibrinonecrotic exudate in distal SI
-DOES NOT CAUSE HEMORRHAGE OR BLOODY FECES
Term
What is Cryptosporidium?
Definition
-small apicomplexan infects the brush border of enterocytes?-
Term
Which age group of animals are affected by cryptosporidium?
Definition
-nenates
Term
What clinical signs do we see due to crytpo intestinal infection?
Definition
-diarrhea due to malabsorption, minimal gross lesions
-inflammatory mediators may contribute a small secretory sompnent
Term
Why is crypto worth special attention?
Definition
-zoonotic
Term
What is Strongylus vulgaris?
Definition
-large strongyel of horses
Term
What lesions do we see due to Strongylus vulgaris?
Definition
-larvae cause endoarteritis in mesentery: esp cranial mesenteric a
-may result in infarction of segments of the intestine
-well-demarcated, dark red and necrotic foci
Term
What is Trichuris?
Definition
-whipworms
-small thread-like nematodes in the cecum and possibly colon
Term
Which species are affected by intestinal whipworm infections?
Definition
-most domestic mammals EXCEPT THE HORSE
Term
What lesions do we see due to whipworm infections?
Definition
-red and edematous mucosa in the cecum and colon
-possible erosion and effusion of fibrin and blood from ucosal surface
-masses of tangled worms are visible on the mucosal surface
Term
What clinical signs do we see with whipworm infections?
Definition
-chronic diarrhea and dysentery with possible weight loss
Term
What are Ancylostoma spp?
Definition
-adults in SI: feed o blood => anemia and hypoproteinemia
-red mucoid SI content with attached worms
Term
What are Ascardis? HOw do they cause damage?
Definition
-adults live in SI
-larval migration => foci of inflamamtion and scarring in liver and lungs
Term
What are the clinical signs do we see due to Ascarids spp?
Definition
-esp in foals large numbers of worms => intussusception or impaction
-intestinal rupture or perforation is possible
-heavy parasite burden may lead to wt loss or poor growth
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