Pasteurellaceae Flashcards
pasteurella characteristics
- small, gram negative rods/coccobacilli
- aerobic or facultatively anaerobic
- non-motile, non-spore forming
- ferment sucrose
- bipolar staining
where is pasteurella multocida found
- upper respiratory tract of many animals
- 50% tonsils of normal dogs
- nasopharynx of healthy humans
survival of p multocida in environment
- virulent in dried blood for 3 weeks
- survives in carcasses for 18 months
wild vectors for p multocida
skunks, raccoons, wild fowl are vectors
transmission of p multocida
airbone droplets, contaminated feed/water
p multocida in mammals
- normal flora in oropharynx
- when resistance of animal is reduced, it is a secondary invader
p multocida in birds
- healthy birds don’t carry it
- associated with acute or chronic disease
- significant economic loss
hemorrhagic septicemia in cattle
- p multocida
- fever, dysentery, edema of throat and brisket
- high mortality
- blood stained fluid accumulation
- rare or non-existent in north america
treatment and control of hemorrhagic seticemia
- antibiotics early
- vaccines available (bacterins, MLV)
- disinfect with 0.5% phenol!
fowl cholera
- p multocida
- affects domestic poultry and wild birds
- healthy birds don’t carry it
- turkeys more susceptible
- swelling and edema, lameness, lung consolidation, high mortality
- environmental contamination (not egg transmitted)
treatment and control of fowl cholera
- bacterins and live vaccines (in water)
- prevent contact with other animals
- continuous antibiotics
snuffles/septicemia in rabbits
- p multocida
- snuffles: mild resp infection, exudate, rhinitis
- septicemia: fever, consolidated lungs, emaciation
- transmission through aerosol, fomites
- no vaccine –> prophylactic antibiotics
atrophic rhinitis in pigs
- p multocida
- 3-8 weeks old
- sneezing, lacrimation, epistaxis
- turbinate bone destruction and snout deformities (to the side)
- dermonecrotic toxin D
control of atrophic rhinitis
- antibiotics (in feed)
- husbandry improvements
- vaccines
p multocida in dogs and cats
- common in mouth and throat of healthy animals
- doesn’t have important pathogenic role
- isolated from bite abscesses or cellulitis lesions
p multocida in humans
- accidental hosts from dog/cat bites
- infection limited to wound site
mannhemia haemolytica info
- upper respiratory tract of cattle and sheep
- acute fibrinous pleuropneumonia in cattle (shipping fever)
- septicemia in sheep
- resistance diminished with environmental stress
- multiplies in nasopharynx, travels to lungs
- produces leukotoxin (exotoxin) –> macrophage destruction
mannhemia haemolytica diagnosis
- small pink colonies in macconkey’s agar
- biotype A - serotype 1
treatment/prevention of mannheimia haemolytica
- antibiotics
- minimize stress
- adequate nutrition
- vaccines
gallibacterium info
- gram negative coccobacillus
- non-motile
- encapsulated
gallibacterium anatistis
- decreased egg production
- affects reproductive tract
- ovarian atrophy, hemorrhages, regressed/ruptured/misshapen follicles
- birds 22-34 weeks old, 40 weeks
