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Bovine Respiratory Disease (Pathogens (Bacterial (E. coli (Associated more…
Bovine Respiratory Disease
Pathogens
Bacterial
Pasturella Multicida
Histophilus Somni
Mannheimia Haemolytica -> Most common pathogen
Trueperella pyogenes
Mycoplasma Bovis
E. coli
Associated more with sepsis due to acidosis and disruption of GIT mucosal lining
Viral
BVDV
Bovine respiratory syncitial virus
BoHV-1 (IBR)
Parasitic
Dictylcaulus vivparous
Usually a multifactorial mixed infection no one sole pathogen
Risk Factors
Environment
Dust
Heat
Managment
Mixing groups
Diet
Procedures
Immune Suppression
Stress is the primary overarching factor which predisposes the animal to BRD it is the result of all these predisposing factor
Diagnosis
Clinical Signs
Depressed
Weight loss
Coughing
Nasal discharge
Head down
Hiding within herd
Post mortem
Treatment
Antibiotics
Early broad spectrum bacterialcidal antibiotics
Tulathromycin
Oxcytetracycline
Very seldom used due to resistance
Ceftiofur
human considerations
NSAIDs
Reduce inflammation shown to have increased growth rates
Important that treatment is early as dramtically reduces effectiveness
Epidemiology
Sporadically occurs in clusters of immuno suppressed animals doesn't necessarily spread through horizontal transmission