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22 Cards in this Set
- Front
- Back
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Haemophilus, Histophilus and Taylorella spp General characteristics
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Gram negative rods
facultative anaerobes doesn't grow on MacConkey agar |
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H H and T Natural habitat
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commensal of mucus membranes and URT,
doesn't survive long in environment |
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Haemophilus ssp motility
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motile
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Histophilus spp. motility
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non motile
no capsule |
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Haemophilus felis
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Rhinitis and conjuctivitis in cats
3rd most significant organism in conjunctivitis in cats (chlamydophilia felis, Mycoplasma spp.) |
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H. paragallinarum
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Infections coryza of poultry
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H. parasuis
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Glasser's diseases, pneumonia, septicemia
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Histophilus somni
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Setpicemia, thromboembolic meningoencephalitis TEME, Pneumonia
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Taylorella equigentitalis
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Contagious equine venereal disease CEM
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Haemophilus parasuis Glasser's disease
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sudden death, neurological signs, lateral recumbency, prostration, reluctance to move, cyanosis, difficulty breathing, coughing, anorexia, lameness, swollen joints, fever, abortion
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H. parasuis
virulence factors: |
capsules - 15 types
LPS sideophores |
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Histophilus somni disease
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TEME
disseminated multifocal hemorrhages and infarctions in spinal cord brainstem and cerebral cortex vasculitis |
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Histophilus somni pathogenesis
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adheres to vascular endothelium, apoptosis and lysis of cells, exposes subendothelial collagen, initiates blood clotting
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Histophilus somni pathogenesis cell characteristics
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No capsule, gain entrance into circulatory system, septicemia, LPS, endotoxemia (intracell multip)
IgBP- binds Fc regions |
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Haemophilus parasuis diagnostics
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normal flora
good sites: lung, joint, brain, peritoneal fluid, fibrin in peritoneum, pericardial fluid |
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Histophilus somni diagnostics
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AGGL - infectious coryza
PCR - throat swab or sinus swab |
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Aeromonas spp
Plesiomonas spp Vibrio spp. characteristics |
Gram negative rod
produces a capsule motile - flagella facultative aerobic bacteria |
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Aeromonas, Plesiomonas, Vibrio habitat
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aquatic environments,
inhabits GI tract of many aquatic species opportunistic pathogen |
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Aeromones Plesiomonas, Vibrio spp. disease of aquatic species
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A. hydorphilia - red leg disease in frogs, necrotic stomatitis of reptiles, hemorrhagic septicemia
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Aeromonas, Plesiomonas, Vibrio virulence factors
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LPS
exotoxins causing tissue damage and overwhelm host defenses causing a septicemia |
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Aeromonas hydorphilia diagnosis
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isolation of organism: correlation with clinical signs, gross and histological lesions
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Aeromonas, Plesiomonas, Vibrio spp. environmental factors and zoonosis
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high density, water quality
Vibrio cholerae is not a pathogen of animals |
