Management of the growing lamb Flashcards
What are some common disease in lamb > 6 weeks
- PAsteurella
- Clostridial disease
- Pulp kidney
- GI parasites -> nematodirus, Telodorsagia, haemochus
Describe Pasteurellosis
- Opportunistic pathogens
- Susceptible after time of stress
and other URT viral infection
What presentaiton sof pasteurellosis are there?
A. Bacterial infection of lowerresp tract
Septicaemia (>2months)
Signs of LRT infection?
- Dyspnoea
- Fever
- Depression
- Coughing
- Oronasal discharge
- Abnormal lung sounds
Septiaemia signs?
- Fever
- Listlessness
- Sudden Death
URT→ LRT→ Blood system → septicaemia + localisation in other tissues
Diagnosis PAsteurellosis?
History of stressors or other viral respiratory insults
Clinical signs
Antenatal- BAL and culture
Post-mortem- pulmonary samples for PCR
Tx for Pasteurellosis ?
Antibiotics
NSAIDS
Supportive treatment
Very unlikely to be successful
Prognosis poor
Prevention for Pasteurellosis?
Avoiding known stressors-managing concurrent
diseases, nutritional problems and transportation
Vaccination
Prophylactic antibiotics for lambs??
List the types of Clostirial perfringens and what they do?
Type B -> Lamb dysentery/ enterotox type B in lambs - neonatal
type C -> haemorrhagi enteritis/ enterotox type C
Type D -> enterotoxaemia type D/pulp kidney disease
What are the different strains of clostridial dx?
tetani, novyi, chauvei
Descirbe type D/ Pulpy kidney?
Very common in UK
Well conditioned fast growing animals
Ingestion of high amounts of feed or milk
Overgrowth of C.perfringens producing
toxin
Episilon toxin
CLs of Pulpy kidney?
- Incoordination, seizures, D+ sudden death
- ask for history of vaccines
Diagnosis of pefrfringens D?
PME - hyperaemic ffoci on intestines, fluid filled pericardial sac, rapid autolysis of kidney??
Intestinal contents - toxin identification
Tx & Px ?
Tx: none
Px: vaccine
4-10 week old lambs in unvaccinated ewes
6month + when lambs not had booster vaccine
What important UK species of parasitic gastroenteritis in lambs?
Teladorsagia (Abomasum)
Trichostrongylus (Small intestine)
Nematodirrus (Small intestine)
Haemonchus (Abomasum)
(Moniezia)
Age immunity - parasitic gastroE?
CLS typically 2 months -1 y
- No age immunity to Haemonchus
- Clinical dx in adult sheep with high challenge
when do these parasites appear?
Lifecycle of Nematodirus battus?
Large, easily distinguished eggs
L3 overwinter on pasture
Temp > 10⁰C after cold period → mass hatching
Lamb to lamb disease
CLs (lambs only) PGE?
Severe diarrhoea + dehydration +/- death
Loss of bloom & weight loss
Often precede rising FECs
Lifecycle of Teladorsagia, Trichostrongylus, N Filicollis ?
Re-activation of L4 → Periparturient FEC rise
Temp dependant development to L3 (2wk – 4m)
Ewe to lamb and lamb to disease
‘Telescoping’ of larval development
CLS of PGE? (Teladorsagia, Trichostrongylus, N Filicollis )
Chronic diarrhoea
Unthriftiness
Subclinical parasitism → poor growth
Lifecycle of Haemonchosis ?
High fecundity
Warm humid weather → rapid development to L3
Ewe to lamb and lamb to lamb disease
CLs of Haemonchosis (PGE)?
Associated with blood feeding
- anaemia
- Hypoproteinaemia +/- submandibular oedema
- Loss of condition +/- death
- NO D+
Rapidly develops resistance
Approach to PGE?
CLS & presentation
FEC
PME & worm counts