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22 Cards in this Set

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