Shared Flashcard Set

Details

Equine Bacterial Diseases
Tetanus, Strangles, Botulism, Lyme Disease, Potomac Horse Fever
24
Veterinary Medicine
Not Applicable
10/23/2011

Additional Veterinary Medicine Flashcards

 


 

Cards

Term
What organism causes Tetanus?
Definition

Clostridium tetani

  • Anaerobic
Term
How is Tetanus transmitted?
Definition

Penetrating wounds

  • Puncture wounds of feet most common
  • Prepatent period 7-21 days
  • Disease not transmissible from horse to horse
Term
What are symptoms of Tetanus?
Definition
  • Prolapsed third eyelid
  • Erect ears
  • 'Anxious' expression
  • 'Grinning'
  • Sawhorse Stance
  • Extended tail
  • Stiff movements
  • Hyperreactivity to stimuli
Term
How do you Diagnosis Tetanus?
Definition
  • History of puncture
  • Absent or unknown vaccination history
  • Symptoms
Term
What the difference between Toxoid and Antitoxin?
Definition

Toxoid

  • Provides active immunity against tetanus toxin

Antitoxin

  • Provides passive immunity against tetanus toxin
  • Neutralize unbound circulating toxin
Term
How do you prevent Tetanus?
Definition

Vaccination

  • Annual booster
  • Booster when treating puncture wounds

Wound management

Tetanus prophylaxis in all surgical procedures

Term
What organism causes Strangles?
Definition
Streptococcus equi ( Distemper)
Term
How is Strangles transmitted?
Definition
  • Contact with bacteria in nasal discharge of infected horses or contaminated surfaces
  • May shed organism for weeks to months after symptoms resolve
  • Carrier state exists
  • Pre-patent period 3-6 days
Term
What are Symptoms of Strangles?
Definition
  • Mandibular lymph node enlargement
  • Purulent, tenacious nasal discharge
  • Soft, moist and constant cough
  • Severe pharyngitis and laryngitis
  • Hot painful abscesses in submaxillary, pharyngeal and parotid lymph nodes and lymph vessels
  • Necrosis of skin and eruption of abscesses
  • Edema of lower limbs
  • Empyema of guttural pouch complications
  • Spread of lesions to lungs causing acute pneumonia
  • Purulent inflammation of the brain followed by excitement, neck rigidity and terminal paralysis
  • Pericarditis
  • Lameness and difficult breathing
  • Atypical form of strangles is manifested by subclinical infection and mild disease
Term
How to you diagnosis Strangles?
Definition
  • Symptoms
  • Presence of outbreak in barn
  • Culture of nasal passages or discharge
Term
How do you prevent Strangles?
Definition
  • Vaccination
  • Management/containment of disease outbreak
  • Sanitation
Term
What organism causes Botulism?
Definition
Clostridium botulinum
Term
How is Botulism transmitted?
Definition
  • Consumption of pre-formed toxin in spoiled feed
  • Consumption of bacteria in feed which then produces toxin
  • Not transmissible from horse to horse
Term
What are symptoms of Botulism in foals (<8 months of age)?
Definition

'Shaker Foal Syndrome'

  • Dribbling of milk from mouth and nostrils
  • Inability to swallow
  • Muscle weakness/fasiculations
  • Easily fatigued- lie down frequently
  • Death within 48 hours due to aspiration pneumonia or paralysis of diaphragm
Term
What are symptoms of Botulism in adult horses?
Definition
  • 'Forage disease'
  • Presence of feed in nostrils
  • Normal appetite with inability to swallow
  • 'Playing' with feed/water
  • Weak, shuffling gait - walking on eggshells
Term
How do you treat Botulism?
Definition

Penicillin

Antitoxin

  • Mortality~100% without
  • Mortality~30% with

Nursing Care

  • Nutrition/hydration
  • Management of recumbent animal
Term
How do you prevent Botulism?
Definition
  • Vaccination- Pregnant mares vaccinated at 4 week intervals beginning at 7 month gestation
  • Annual toxoid booster for adult horses
Term
What is the organism that causes Lyme disease?
Definition
Burrelia burgdorferi
Term
How is Lyme disease transmitted?
Definition
  • Deer tick- intermediate host (requires 12-24 hours of attachment for disease transmission)
  • No horse to horse transmission
  • No horse to human transmission
Term
What are symptoms of Lyme disease?
Definition
  • Fever
  • Shifting leg lameness
  • Joint swelling/joint effusions typically in large joints (hock/stifle/carpus)
  • Endocarditis
  • Arthritis
Term
How do diagnosis Lyme disease?
Definition
  • Symptoms
  • Serology
  • Response to treatment
Term
How do you treat Lyme disease?
Definition
Antibiotics
Term
How do you treat Tetanus?
Definition
  • Debride wound
  • Procaine penicillin
  • Tetanus toxoid
  • Tetanus Antitoxin (can't cross blood brain barrier or reverse neurological symptoms)
  • Muscle relaxers
  • Supportive care
Term
How do you treat Strangles?
Definition
  • NSAIDs to manage fever/discomfort
  • Procaine penicillin
  • Lance/drain mature abscesses
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