Lecture 11 Flashcards
What does transmissible gastroenteritis infect
Piglets - 100% mortality Mild disease in young adults
What does transmissible gastroenteritis target
Severe villous atrophy, malabsorption, osmotic diarrhoea - Fusion of adjacent vili means limited vili restoration - If survive -> chronic ‘poor doers’
Signs of transmissible gastroenteritis
Vomiting, profuse diarrhoea, dehydration
Necropsy of transmissible gastroenteritis
- Perineal yellow faecal staining - Dilated thin-walled SI - Yellow fluid and gas contents
What id porcine epidemic diarrhoea virus similar to
Coronavirus similar to TGE
What does porcine epidemic diarrhoea virus infect
All ages
What does porcine epidemic diarrhoea virus cause
Vomiting, diarrhoea, weightloss
What is the pathology of porcine epidemic diarrhoea virus
Occasional epithelial syncytial
What does Classical swine fever cause
Widespread damage to blood vessels - Widespread petechial haemorrhages - Dyspnoea, coughing - Skin erythema and cyanosis - Diarrhoea Button ulcers in the large intestine
What causes swine dysentery
Brachyspira hyodystenteriae
What does swine dysentery affect
Larges intestines
What does swine dysentery infect
Weanling pigs 8-14 weeks
Swine dysentery disease with Is a synergistic disease what are the colonic anaerobes
Fusobacterium necrophorum and bactericides vulgates
What are the signs of swine dysentery
Anorexia, mucohaemorrhagic diarrhoea, dehydration, emaciation
What causes porcine intestinal spirochetosis
Brachyspira pilosicoli
What is infected with porcine intestinal spirochetosis
Pigs, poultry, humans, dogs
What does porcine intestinal spirochetosis cause
Reduced weight gain Watery to mucoid diarrhoea, no blood Grossly severe cases may develop fibronecrotic typhlocolitis
What causes porcine proliferative enteropathy
Lawsonia intracelularis
When does Lawsonia intracelularis infect
Post weaning - Morbidity 10-15%, mortality 50% - Hyperplasia od intestinal crypt calls esp ileum -Progresses to necrosis of crypt cells and haemorrhage
What are the lesions seen with Lawsonia intracellular
Variable amount of blood in faeces Thickened, hyperplastic proliferative mucosa Histologically, may mitoses can resemble neoplasms
What does fibrinous polyserositis cause
- Pleuritis, pericarditis, peritonitis, arthritis, meningitis - Inflammation of intestinal serosa-serositis
What does ascaris suum cause
Weightless, visceral larval migrans, intestinal obstruction
What does coccidiosis cause
Neonatal scours - Villous atrophy, diarrhoea, ill thrift
What does cryptosporidiosis cause
Neonatal scours - Villous atrophy, diarrhoea
What does trichuris suis cause
Typhlocolitis, proctitis, occ. bloody diarrhoea, wt loss
What does oesophagostomun dentate cause
Nodules in large intestine, little clinical significant
What sort of disease is oedema disease
E.co;i
What does oedema disease infect
Pigs only - Usually 6-14 weeks - Often best pigs in excellent condition
What does oedema disease produce
Bacterial antitoxin produced by S.I. - Generalised vascular endothelial injury and oedema
Where do you see the oedema in oedema disease
Eyelids, gastric submucosa, forehead, spiral colonic mesentery
What are the neurological signs seen with oedema disease
Incoordination, tremors, convulsions, death
What soy of disease is post-weaning colibacillosis
E.coli
What does post-weaning colibacillosis infect and when
Pigs only, a couple of weeks after weaning - Ass. with feed and management changed at weaning
What does post-weaning colibacillosis occur concurrently with
Odema disease
Transmissible Gastroenteritis
Transmissible Gastroenteritis
Swine Sysentery: Brachyspira hyodysenteriae
Porcine intestinal spirochetosis
Porcine proliferatice enteropathy
Lawsonia intracellularis
Procine proliferative enteropathy
Lawsonia intracellularis
Porcine Proliferatice Enteropathy
Laesonia intracellularis
Procine proliferatice enteropathy
Lawsonia Intracellularis
Fibrinous Polyserositis
Odema Disease
Ascaris suum: milk spot liver
Fibrinonecrotic enteritis
