Cardiorespiratory Flashcards
What is the most common pericardial condition in ruminants?
Traumatic reticulo-pericarditis (TRP)
What is the result of septic pericarditis?
Cardiac tamponade -> CHF
What is the typical history for septic pericarditis?
Non-specific
Milk drop
Inappetence
Unresolved non-specific illness
What are the early clinical signs of septic pericarditis?
Pain - abducted elbows, withers positive, arched back, firm palpation
Rubbing/friction sounds on auscultation
Tachycardia
Pyrexia +/- associated with BRD signs
What are the later clinical signs of septic pericarditis?
Muffled heart sounds bilaterally
Squeaking, splashing, rubbing
Difficulty to palpate apex beat
Pyrexia +/-
Congestive heart failure signs
How do you diagnose septic pericarditis?
Ultrasound ICS 3-5 on both sides
Purulent fluid in the pericardial sac +/- fibrin
Hepatic congestion
PME
How do you treat septic pericarditis?
Magnet bolus and broad spectrum antibiotics = amoxicillin or oxytetracycline
Late stages - prognosis poor to hopeless so PTS
What is the main bacteria involved in bacterial endocarditis?
Truperella pyogenes
What are the predilection sites for bacterial endocarditis?
Right AV valve (tricuspid)
Left Av valve (mitral)
What are the clinical signs of bacterial endocarditis?
Murmur +/- palpable thrill
Persistent tachycardia
Ill thrift
Milk drop
How do you diagnose bacterial endocarditis?
Ultrasound
Blood culture
How do you treat bacterial endocarditis?
Long-term antibiotic therapy for a minimum of 3 weeks.
Penicillin/amoxicillin
Furosemide if CHF present and analgesia
What are the clinical signs of congenital cardiac diseases?
Murmurs
Poor growth
Increased respiratory rate/effort
Cough
What is the most common congenital cardiac defect in the calf?
Ventricular septal defect
What does hyperkalaemia cause?
Bradycardia
Severe, acute diarrhoea
Urinary obstruction
What deficiency causes white muscle disease?
Vitamin E/ selenium
What does BRD stand for?
Bovine respiratory disease
What are the top 3 viruses that can cause BRD?
IBR, RSV and PI3
What are the bacterial causes of BRD?
Pasteurella multocida
Mycoplasma bovis
Mannhaemia haemolitica
What are the clinical signs for IBR?
Harsh URT sounds
Very pyrexic
Impact on fertility and yield
What is the incubation period for IBR?
2-20 days
What is the incubation period for RSV?
2-5 days
What is the pathophysiology of RSV?
Necrotising bronchiolitis and interstitial pneumonia.
Emphysematous lesions may develop in caudodorsal lung lobes.
How does PI3 affect the respiratory tract?
Infects ciliated epithelium of the respiratory tract, alveolar epithelium and macrophages.
How is mycoplasma bovis transmitted?
Transmitted by aerosols through coughing between cows.
Infected cows can shed it in their milk and pass onto calves.
What are the four ways to diagnose BRD?
Pathogen detection
Lung pathology detection
Clinical signs based
Epidemiology based
What swabs can be taken to help aid diagnosis of BRD?
Conjunctival swab - IFAT or PCR for IBR
Nasopharyngeal swab and BAL - not first line
What are the secondary problems linked to BRD?
Failure of passive transfer
BVD
Selenium deficiency
Liver fluke
Parasitic gastroenteritis
What are the early signs of BRD?
Pyrexia
Isolation and behaviour changes
Slow to feed, don’t drink milk allowance
What are the treatment options for BRD?
NSAIDS
Antibiotics - oxytetracycline
Electrolytes
TLC
What are the four key environmental factors that contribute towards the prevention of BRD?
Cleanliness
Fresh air
Temperature
Humidity
What system should be adopted in calf sheds to help with the prevention of disease outbreaks?
All in all out system, with calves in age groups that don’t mix.