Alimentary System Flashcards
Normal oral and gastric mucosa should be….
Smooth and shiny
Why are feces considered a window into the health of the alimentary system?
The quality and quantity is often an early indicator of alimentary dysfunction as is regurgitation and vomiting
Portals of entry of pathogenic agents
Ingestion
Coughed up by the lungs and swallowed
Systemic hematogenous route
Migration through the body (parasites)
Defense mechanisms of the alimentary system
Saliva Resident flora and fauna Gastric pH Secreting immunoglobulins Vomiting Intestinal proteolytic enzymes Phagocytes and other effector cells within the mucosa/submucosa High rate of epithelial turnover Increased peristalsis resulting in diarrhea
Palatoschisis
Cleft palate
Cheiloschisis
Cleft lip
Malocclusions
Failure of the upper and lower incisors to interdigitate properly resulting in problems with mastication and pretension
Brachygnathia
Shortening of the lower jaw
Prognathia
Protrusion of the lower jaw
Dental attrition
Loss of tooth structure cause by mastication
“Step mouth”
Abnormal wearing of the teeth in herbivores
Dental calculus
Tartar –> mineralized dental plaque
What is the primary disease of the tongue?
Actinobacillosis “Wooden tongue”- actinobacillus lignieresii causing chronic stomatitis
Seen in cattle and occasionally swine and sheep
What is thrush and what causes it?
Candidiasis
Seen in young animals treated with antibiotics for long periods of time or with underlying diseases
What lesion is seen with cats with chronic kidney failure?
Uremic glossitis
What is the Pathogenesis of uremic glossitis in cats with chronic kidney failure?
Increased BUN in the blood and in the oral cavity leading to ammonia using bacteria causing ulcers
Etiology of Stomatitis?
Infectious agents Trauma Chemical injury Auto immune Idiopathic
Ptyalism
Hyper salivation
Pathogenesis of viral vesicular stomatitides
Viral-induced epithelial damage –> intracellular edema in keratinocytes (ballooning and degeneration) –> vesicles –> bullae –> rupture leads to erosion and ulceration
Etiology of Vesicular glossitis in a cat?
Feline calicivirus
What species is Foot and Mouth disease found in?
Ruminants and pigs - NOT HORSES!!
What species is vesicular stomatitis affect?
Ruminants, pigs, and horses
What species does vesicular exanthema affect?
Swine
What species does Swine vesicular disease affect?
Only pigs
What are the clinical signs of FMD?
Ptyalism and lameness
What disease causes “Tiger heart” in young animals?
Foot and mouth disease
What disease cause erosive ulcerative stomatitides in cattle?
BVD and Malignant Catarrhal fever
What disease cause Papular stomatitides?
Parapoxvirus
What disease causes pustular dermatitis of the lips and udder in sheep and goats?
Contagious ecchymosis, Orf , or sore mouth
Where does contagious ecthyma develop?
Areas prone to trauma - lips, mammary glands and coronary bands
What bacteria causes necrotizing stomatitis (oral necrobacillosis) in calves?
Fusobacterium necrophorum
Epulis
Tumors of the periodontal ligament type stroma
Is oral melanomas in dogs benign or malignant?
Malignant
What causes congenital megaesophagus?
Persistent right aortic arch
What causes acquired megaesophagus?
Idiopathic or Myasthenia gravis
What causes chronic granulomatous esophagitis in dogs?
Spirocerca lupi
What is ruminal tympany or bloat?
Over distinction of the rumen and reticulum due to gas produced during fermentation
What is the primary cause of ruminal tympany?
A new diet that promotes the formation of stable foam