Final: GI - vomiting, SI, LI Flashcards
What is the preferred test for T. foetus ?
Fecal PCR
The large intestine is characterized by deep, straight _____ in which there are large numbers of _______.
Crypts
Goblet cells
*Stressed in class*
Why is the antigen ELISA for giardia not recommended as a recheck test?
Can remain positive for a long time after clearance of the disease
What emperic therapy do you try for a stable patient with chronic disease in which you suspect a primary enteropathy?
Deworming
Diet change
Antibiotic trial
+/- Pre or pro-biotics
A young shelter cat presents with waxing and waning LI diarrhea and a very painful edematous rectum. What is the likely diagnosis and how would you treat it? What symptoms, that usually resolve, can you expect?
Tritrichomonas foetus
Tx: Ronidazole (SID q2 weeks)
Neuro signs
Whatever the histologic type of IBD, treatment usually involves a combination of ________ with ______and/or ______ therapy.
Dietary modification
Antibacterial
Immunosuppressive
What is the most important treatment modality in idiopathic IBD?
Immunosuppression
What drugs do you give a dog with Salmon Poisoning?
Oxytetracycline or Doxycycline (for neorickettsia)
Praziquantel (for fluke)
What are the 2 most important considerations when choosing a diet to feed an animal with GI disease?
Nutrient content
Digestibility
*Starred on slide*
A young dog has developed acute colitis due to dietary indiscretion. What is your first course of therapy?
Withhold food temporarily and modify diet (low fat, highly digestible)
What cause of large bowel colitis also causes ocular and CNS signs in dogs? What is the treatment?
Prototheca (toxic algae)
Amphotericin B + Intraconazole
T/F: Most cats affected with feline idiopathic megacolon eventually require a colectomy.
True
What is the major substrate for bacteria that is not digested by the SI?
Fermentable fiber
Why should TLI/PLI, serum cobalamin and/or folate be run on a dog presenting with colitis?
Extension of pancreatic inflammation can cause inflammation of the adjacent regions of the colon and cause signs of colitis
Histoplasmosis causes chronic LI diarrhea in young dogs and cats. What stains can you use to help demonstrate the organism in fixed tissues? What is the treatment?
PAS and Gomori’s Methenamine silver stain
Intraconazole for 4-6 months
What is the term for repeated unsuccesful attempts to defecate or pain on defecation? What usually precedes this (clinical sign)?
Dyschezia
Staining to urinate and/or blood in urine
Enterotoxigenic E.coli (ETEC) causes ____ (SI/LI) disease, while enterohemorrhagic E.coli (EHEC) causes _____(SI/LI) disease.
ETEC= SI
EHEC= LI
Renal disease causes a loss of _____, with GI disease ______ and _______ are lost.
Albumin
Globulins and Albumin
What must you give a dog with Heterobilharzia americana who has hypercalcemia?
Praziquantel
*Starred on sides*
What medications can you use to treat mild histoplasmosis? Severe?
For how long do you treat?
Mild: Intraconazole, Fluconazole, Ketoconazole (can cause Addision’s)
Severe: Amphotericin B
Treat 6mo - 1 yr
What are the 3 main functions of the colonic microbiome?
Immune system interface
Energy for colonocytes
Synthesizing AAs and vitamins
If you have neuro signs accompanying GI signs in a cat, what parasite do you suspect? What eye clinical sign can this also cause?
T. gondii
Chorioretinitis
What is the diet indicated for a dog with lymphangiectasia?
Fat-restricted
Calorie-dense
Highly digestible
+ Fat-soluble vitamin supplements
(Do not feed weight-reduction diet)
What disease associated with intracellular E.coli (AIEC) occurs frequently in young Boxer dogs and causes disease limited almost exclusively to the colon? How is it characterized histologically? What is the treatment?
Granulomatous Colitis
(formely known as Histiocytic Ulcerative Colitis (HUC))
Histo: Presence of macrophages full of PAS-positive stain
Tx: Enrofloxacin
(Do not give immunosuppressives!)
In what part of the GIT are most nutrients broken down?
Jejunum (microvilli of the)
Is cell turnover faster or slower in the large intestines (compared to SI)? How long is turnover?
Slower
LI= 4-7 days
(SI=3 days)
Impairement of Pattern Recognition Receptors, found on _____, are thought to be involved in IBD.
Phagocytes
What is the main energy requirement of enterocytes? What occurs when this is absent (4 things) ? What does this look like clinically?
Glutamine
Decline in villi structure, loss of epithelial integrity, decreased immune function, decreased absorptive function
CS: Weight-loss, secondary bacterial infections (-> sepsis), unthrifty
What are the most common biopsy diagnoses?
Inflammatory bowel disease (several types)
Lymphangectasia
Lymphoma
What are the 2 reasons a dog with colonic disease may be losing weight?
Concurrent small intestinal disease
Advanced disease
(Things that cause inappetence)
What are the fat soluble vitamins?
Vit A, D, E, and K
What kinds of antidiarrheals may bind bacterial toxins and produce firmer stool? What can you give to reduce tenesmus?
For diarrhea: Kaolin-based
For tenesmus: Diphenoxylate or Loperamide
T/F: The long-term prognosis for lymphangiectasia is poor and patients almost invariably succumb ultimately to severe malnutrition, incapacitating effusions, and intractable diarrhea.
True
Tenesmus, increased urgency, and watery diarrhea is indicative of _________ disease.
Large bowel/intestine
You have a feline patient with severe pancreatitis. On the blood work you have elevated bilirubin and mildly elevated AST. What is causing the elevated bilirubin?
Cholestasis due to duct obstruction
Sher Pai, Giant Schnauzers, Beagles, and Border Collies get a congenital deficiency of which vitamin?
B-12
What 2 lipases digest short and medium chain fatty acids?
Lingual
Gastric
Which dog breed(s) get(s) gluten-sensitive enteropathy?
Irish Setter
Which 4 breeds commonly get PLE?
Wheaton Terrier
Lundehund
Yorkie
Rotties (in Europe)
How long does a dog with parvovirus shed?
While sick and up to 8-10 days after acute illness
What can you use in combination with pred to treat IBD when the initial response to therapy is poor or the steroid side effects are marked?
Azathioprine
Make sure you warn owner that drug is toxic also must monitor CBC (myelosuppressive)
T/F: Most cats affected with feline idiopathic megacolon eventually require a colectomy.
True
Which of the following is not associated with large bowel diarrhea?
Fecal volume normal to mildly increased
Urgency and marked increase in frequency
Steatorrhea
Tenesmus
Hematochezia
Melena
Melena
Steatorrhea
The large intestine secretes mucus and _______.
Bicarbonate
What is the preferred diagnostic test for T. gondii in a sich pet?
Antibody titers for IgG and IgM
However note, positive titers do not indicate oocyst shedding or clinical diseae esp if only IgG is +
T/F: Performing a canine parvo SNAP test on a kitten showing parvo signs can help diagnose feline panleukopenia.
True
What makes the prognosis for AHDS poor?
Hypoproteinemia and sepsis
What drug can be used off-label to treat IBD by immunosuppression in a diabetic patient?
Apoquel (need ihgh dose, does not affect glucose metabolism)
What are the 2 drugs you can use to treat Giardia duodenalis? For how long do you treat?
Fenbendazole
Metronidazole
5 days
What is associated with peri-natal infection with feline panleukopenia?
Cerebellar hypoplasia
Can improve clinically over time