Infectious diseases : Fungal Diseases Viral Diseases Bacterial Diseases.
4 h bacterial diseases
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Transcript of 4 h bacterial diseases
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Bacterial Diseases
4-H Veterinary ScienceExtension Veterinary Medicine
Texas AgriLife Extension ServiceCollege of Veterinary Medicine and Biomedical Sciences
Texas A&M Systemhttp://aevm.tamu.edu
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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
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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
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Bacteremia Blood
Septicemia Harmful waste products in blood
Toxemia Toxins in blood
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Occurs Normal incubation period Development of dormant infection
Pathogens Primary bacterial disease Secondary bacterial disease
Predispositions Primary infection Stress Tissue injuries Dietary changes
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Generalized Conditions
Caused by various abnormalities Anemia Encephalitis Hepatitis Pneumonia Nephritis Gastroenteritis
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Clostridial diseases Systems affected
GI Musculo-skeletal Nervous
Spore forming Natural inhabitants
Soil Intestinal tracts
Affects numerous species
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Two Categories Active invasion of tissue with production of toxins Toxemia resulting from absorption of toxins by
digestion (enterotoxemias) or ingestion (botulism)
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Types
Species Hosts Diseases
Clostridium botulimun Animals, Man Botulism
Clostridium chauvoei Cattle Blackleg
Clostridium perfringens Sheep Enterotoxemia
Clostridium perfringens Man Gas Gangrene
Clostridium tetani Animals, Man Tetanus
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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
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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
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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
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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
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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
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Ear
Otitis externa Description
Infection of the external ear canal Characterization
Inflammation of epithelium Reddening Itching Drainage
Symptoms Scratching or rubbing
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Affects primarily dogs and cats
Predispositions Small external ear canal opening Excessive hair Flopped ears Warm, humid weather
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Respiratory System
Rhinitis Description
Inflammation of the mucous membranes of the nasal passages
Acute or chronic Symptoms
Nasal discharge Open-mouth breathing Sneezing
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Sinusitis Description
Inflammation of the sinuses Acute or chronic Symptoms
Nasal discharge Open-mouth breathing Sneezing
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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
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Diseases Cattle and swine
Pasteurellosis Cats
Pneumonitis
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Tonsillitis Description
Inflammation of the tonsils Common in dogs Symptoms
Gagging Retching Soft coughing Expulsion of mucus
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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
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Diseases Salmonellosis Enterotoxemia Colibacillosis
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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
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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
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Termination Bacteria attack
Embryo/fetus Placenta Uterus
Transmission Ingestion Inhalation Venereal
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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
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