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13 Cards in this Set
- Front
- Back
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give some examples for nutritional causes of diarrhoea
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Aetiology
•Poor quality milk replacers •heat damaged protein/vegetable protein •excess NFC •inadequate fat •Feeding errors (eg.dilutingmilk with water) •Not feeding fresh or preserved milk •Feeding too much milk in one feed •Feeding cold milk |
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how would you treat calf d+?
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Stop feeding milk/ milk replacer for 24 hrs, give replacement fluids PO or IV if needed
•Electrolytes restore calf’s vigour/sucking drive within 1 –2 days •Recommence feeding with whole milk or a good quality milk replacer at 5% BW /day •BID, 39oC, teat with a smallish bore hole •Reconstitute at 11 –13% DM •Gradually reinstate normal feeding 3 –7 days later depending on severity of scours •Antibiotics if required |
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what metabolic imbalance occurs with diarrhoea?
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•Acidosis caused by accumulation or loss of buffers from the body
•Treat with isotonic bicarbonate solution (if severe acidosis) •Hypokalaemiacan occur with anorexia, diarrhoea and diuretic therapy. •Potassium can be added to IV fluids |
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Does Enterohaemorrhagic E.coli affect calves less than 4 days old? What is the age range?
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NO!
4- 28days |
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How cna you prevent colibaccilosis?
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Vaccinate dams within 6 weeks of calving.
•Based around predisposing causes •Nutrition (colostrumamount and quality) •Age of calf •Environmental conditions and overall stress •Ensure all calves get adequatecolostrum |
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What diseases affect calves from 2weeks - 2 months?
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Salmonellosis!
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What is the most common agent of salmonellosis?
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S. typhimurium/ S. dublinmost common
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What ar ethe 3 clinical signs of salmonellosis?
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1.Peracutesepticaemic –no diarrhoea, death 24 –48 hours
2.Acute –pyrexia, severe watery, putrid diarrhoea, may die 3.Chronic –weight loss, intermittent diarrhoea |
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Enterotoxaemia: what is the cause>?
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(C. perfringens)
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What is the Most common cause diarrhoea in calves?
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Rotavirus!
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How does rota virus and corona virus work?
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Destruction of the absorptive villous epithelial cells, compensatory hyperplasia of the crypt cells –digestive secretions continue
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What is the aetiology of cryptosporiduum?
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Invasion and villous atrophy of small and large intestineresults in malabsorptionand 2omilk fermentation
High morbidity, low mortality Often mixed infection Resistant to most disinfectants, survives well in environment |
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What is the most important intestinal parasite?
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Cryptosporidium parvum
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