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Bacterial Diseases. 4-H Veterinary Science Extension Veterinary Medicine Texas AgriLife Extension Service College of Veterinary Medicine and Biomedical Sciences Texas A&M System http://aevm.tamu.edu. Objectives . Describe bacterial diseases that affect the skin

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bacterial diseases

Bacterial Diseases

4-H Veterinary Science

Extension Veterinary Medicine

Texas AgriLife Extension Service

College of Veterinary Medicine and Biomedical Sciences

Texas A&M System

http://aevm.tamu.edu

objectives
Objectives
  • Describe bacterial diseases that affect the skin
  • Describe bacterial diseases that affect the eye
  • Describe bacterial diseases that affect the ear
  • Describe bacterial diseases that affect the reproductive system
  • Describe clostridial diseases
bacteria
Bacteria
  • Definition
    • Single-celled microorganisms which can exist either as independent (free-living) organisms or as parasites (dependent upon another organism for life)
  • Invade tissues
  • May produce
    • Pus
    • Harmful or poisonous waste
slide4
Bacteremia
    • Blood
  • Septicemia
    • Harmful waste products in blood
  • Toxemia
    • Toxins in blood
slide5
Occurs
    • Normal incubation period
    • Development of dormant infection
  • Pathogens
    • Primary bacterial disease
    • Secondary bacterial disease
      • Predispositions
        • Primary infection
        • Stress
        • Tissue injuries
        • Dietary changes
generalized conditions
Generalized Conditions
  • Caused by various abnormalities
    • Anemia
    • Encephalitis
    • Hepatitis
    • Pneumonia
    • Nephritis
    • Gastroenteritis
slide7
Clostridial diseases
    • Systems affected
      • GI
      • Musculo-skeletal
      • Nervous
    • Spore forming
    • Natural inhabitants
      • Soil
      • Intestinal tracts
    • Affects numerous species
slide8
Two Categories
    • Active invasion of tissue with production of toxins
    • Toxemia resulting from absorption of toxins by digestion (enterotoxemias) or ingestion (botulism)
slide10
In cattle
    • 7-way Clostridial vaccine
      • C. chauvoei – blackleg
      • C. septicum – malignant edema
      • C. novyi – black disease (neck, liver, gut)
      • C. sordellii – gas gangrene
      • C. perfringens Types B, C and D – enterotoxemia
slide11
Skin
  • Dermatitis
    • Description
      • Inflammation of the skin
    • Causes
      • Bacteria
      • Arthropods
      • Fungi
      • Allergens
    • Common sign
      • Pruritus (itching)
      • Skin lesions
        • Reddening/thickening of skin
        • Bumps
        • Blisters
        • Crusts or scales
slide12
Pyoderma
    • Description
      • Skin condition with the presence of purulent exudate (pus)
    • Superficial or deep pustules
    • Associated with
      • Skin allergies
        • “Hot spots”
      • Mange conditions
    • Observe
      • Warm, humid weather
slide13
Eye
  • Keratoconjunctivitis
    • Description
      • Inflammation of the eyeball’s surface (cornea) and the eyelid’s lining (conjunctiva)
    • Conjunctivitis
      • Inflammation of the conjunctiva
      • With/without keratitis
      • Symptoms
        • Reddening of eyelids
        • Rubbing
slide15
Keratitis
    • Inflammation of the cornea
    • Symptoms
      • Opaque or cloudy cornea
      • Possibly ulcers
      • Sensitive to sunlight
      • Mucopurulent (mucus with pus) tears
      • Crusty matter around eyes
    • Ulcers diagnosed with flourescent dye
    • Common name
      • Pink eye
slide16
Ear
  • Otitis externa
    • Description
      • Infection of the external ear canal
    • Characterization
      • Inflammation of epithelium
      • Reddening
      • Itching
      • Drainage
    • Symptoms
      • Scratching or rubbing
slide17
Affects primarily dogs and cats
  • Predispositions
    • Small external ear canal opening
    • Excessive hair
    • Flopped ears
    • Warm, humid weather
respiratory system
Respiratory System
  • Rhinitis
    • Description
      • Inflammation of the mucous membranes of the nasal passages
    • Acute or chronic
    • Symptoms
      • Nasal discharge
      • Open-mouth breathing
      • Sneezing
slide19
Sinusitis
    • Description
      • Inflammation of the sinuses
    • Acute or chronic
    • Symptoms
      • Nasal discharge
      • Open-mouth breathing
      • Sneezing
slide20
Pneumonia
    • Description
      • Bacterial infection in the lung tissue and air passages causing acute or chronic inflammation
    • Symptoms
      • Deep cough
      • Difficulty breathing
    • Bacteria complicate viral pneumonia
slide21
Diseases
    • Cattle and swine
      • Pasteurellosis
    • Cats
      • Pneumonitis
slide22
Tonsillitis
    • Description
      • Inflammation of the tonsils
    • Common in dogs
    • Symptoms
      • Gagging
      • Retching
      • Soft coughing
      • Expulsion of mucus
digestive system
Digestive System
  • Gastroenteritis
    • Description
      • Inflammation of the stomach and intestines
    • Many types of bacteria
    • Symptoms
      • Excessive salivation
      • Vomiting
      • Diarrhea
      • Straining
      • Abdominal pain
      • Hemorrhages
        • Blood in diarrhea
slide24
Diseases
    • Salmonellosis
    • Enterotoxemia
    • Colibacillosis
reproductive system
Reproductive System
  • Metritis
    • Description
      • Inflammation of the uterus
    • Postpartum disorder
    • May cause
      • Abortions
      • Retained placentas
    • Symptoms
      • Purulent, foul-smelling vaginal discharge
    • Persistent metritis
      • Infertility
    • Diseases
      • Contagious equine metritis
slide27
Abortion
    • Description
      • Premature birth of a fetus by pregnant females
    • Early termination of pregnancy due to bacterial infection
    • Diseases
      • Brucellosis
      • Leptospirosis
      • Campylobacteriosis
      • Trich
      • Neospora

Aborted Fetus

slide28
Termination
    • Bacteria attack
      • Embryo/fetus
      • Placenta
      • Uterus
  • Transmission
    • Ingestion
    • Inhalation
    • Venereal
slide29
Mastitis
    • Description
      • Inflammatory process involving the mammary glands or udder tissue during lactation
    • Occurrences
      • Infected nipple
      • Blood
      • Penetrating wounds
    • Symptoms
      • Udder
        • Swollen
        • Warm
        • Painful
      • Milk
        • Hemorrhagic
        • Purulent