PGE revision Flashcards
What are the clinical signs of PGE?
Profuse watery diarrhoea
Weight loss
Inappetance
Dehydration
Death
What are the sub clinical signs of PGE?
Poor weight gain
Reduced appetite
Reduced feed intake
Loss of plasma proteins into
gastro-intestinal tract
How do you diagnose PGE?
-Clinical signs – diarrhoea, weight loss/poor weight gain
-Season
-Faecal egg counts >750epg
What are the worms that cause PGE in the abomasum?
- Haemonchus contortus
- Teladorsagia circumcincta
- Trichostrongylus axei
What are the worms that cause PGE in the small intestine?
- Nematodirus spp
- Trichostrongylus spp
- Cooperia spp
What are the worms that cause PGE in the large intestine?
- Chabertia spp
- Oesophagostomum spp
- Trichuris spp
What are the factors affecting source of infection?
- Peri-Parturient Rise (PPR) in ewes
- Hypobiosis of larvae
- Overwintered L3
What are the 5 classes of anthelmintics?
- Bz - benzimidazoles
- Lev - Imidathiazoles
- ML - Macrocyclic Lactones
4.AD - Amino-acetonitrile derivative
5.SI - Spiroindoles
What are the clinical signs of haemonchosis?
*Erosion of abomasal wall
*Severe haemorrhagic gastritis
*Severe anaemia
*Oedema
*Weight loss
Diagnosis of haemonchosis?
- Clinical signs – anaemia
- Season
- Faecal egg counts
What are the internal features of nematodiriasis battus?
*Developing L5 destroy the mucosa
*Catarrhal enteritis
*Villous atrophy
*Fluid and nutrient absorption disrupted
*~2000 worms can cause clinical disease
What are the clinical signs of nematodiriasis battus?
*Sudden (explosive) outbreaks of acute, watery diarrhoea
*Inappetence, dehydration (thirsty!), abdominal
pain, weight loss
*Disease in lambs around 4 – 12 weeks of age
*Disease often starts in pre-patent period
*Mean WEC > 500 epg = heavy infestation
