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LA nematodes - Coggle Diagram
LA nematodes
Sample taking + diagnosis
PM Abomasum
Clinical signs
Ill-thrift
Suboptimal growth rates
Lethargy
Scouring / Diarrhoea
Flystrike
Mucosal damage
Maldigestion
pH changes
Loss of bacteriostatic effects
Increased lumen water content
Anaemia - PCV
Bottle jaw
Protein losing gastro-enteropathy
Mobilisation of protein reserves
Pale membranes
Shock: >10% blood loss
10 days of infection
Climate: Recent rains
Diagnostics
Worm faecal eggs count
Eggs per gram (EPG)
Young cattle and sheep
Quantitative floatation test
Larvae culture
Young animals
Total (differential) worm count
Severity chart
Seasonal pasture epidemiology
Rainfall
Climatic zones
High rainfall
Summer
Northern NSW + Southern QLD
Sheep / cereal zone
Winter rainfall
52% of nation's sheep
Pastoral zone
Dry
L3 pasture accumulation + survival
Do not introduce susceptible hosts
Clean up pasture in summer
Low worm numbers
Resistant hosts / pasture spelling
Infection factors
Drench resistance
Check for effectiveness
Host
Host species: Goats most susceptible> sheep > cattle
Age / stage
Lower immunity
Lactating / pregnant
Periparturient rise (PPR)
Increased egg production --> L3 ingested by lambs
Young
No acquired host resistance
Arrested larval development
Few eggs laid
Resident worms expelled
16-20 weeks old
<6 months
Genetics of resistance
Pasture management