pt2

Cards (82)

  • What type of bacteria is Actinomyces?

    Non-motile, non-spore forming
  • What type of environment does Actinomyces prefer?
    Capnophilic
  • What is the Gram stain result for Actinomyces?
    Gram-positive bacteria, branching rods
  • What type of media is required for Actinomyces to grow?
    Enriched media like serum or blood
  • What structure do most Actinomyces species produce?
    A true mycelium that fragments
  • How many species of Actinomyces commonly cause disease in domesticated animals?
    Four species
  • Name one species of Actinomyces that causes disease.
    1. bovis
  • Where is Actinomyces normally found in animals?
    Oral, gastrointestinal, urogenital tracts
  • How is Actinomyces affected by heat and disinfectants?
    Readily killed by heat and disinfectants
  • What was Arcanobacterium pyogenes formerly called?
    Actinomyces pyogenes
  • What type of lesions does Arcanobacterium pyogenes commonly cause?
    Suppurative lesions
  • What condition is associated with Arcanobacterium pyogenes in cattle?
    Summer mastitis
  • What does the term "pyogenic" refer to in Arcanobacterium pyogenes?

    Pus-producing
  • How does Arcanobacterium pyogenes appear on blood agar plates?
    Hemolytic
  • What disease does Actinomyces bovis cause?
    Lumpy jaw
  • What is the primary site of infection for Actinomyces bovis?
    Mandible and maxilla of cattle
  • How does Actinomyces bovis typically invade tissues?
    Following trauma to the mucosa
  • What are "sulphur granules" associated with in Actinomyces bovis infections?
    Characteristic club colonies in exudate
  • What is the treatment of choice for small lesions caused by Actinomyces bovis?
    Surgery
  • What media is good for isolating Actinomyces bovis?
    Loeffler’s blood serum slants
  • Which antibiotics is Actinomyces bovis sensitive to?
    Penicillin and streptomycin
  • What is one treatment option for Actinomyces bovis infections?
    Iodine compound
  • What condition does Actinobaculum suis cause?
    Porcine cystitis and pyelonephritis
  • How is Actinobaculum suis transmitted?
    At coitus
  • What disease does Actinomyces viscosus cause in hamsters?
    Periodontal disease
  • How does Actinomyces viscosus affect dogs?
    Causes abscessation
  • How is Actinomyces viscosus diagnosed?
    Lack of club formation in lesions
  • What distinguishes Actinomyces viscosus from Nocardia species?
    Failure to grow on SDA
  • What shape are Mycobacterium bacteria?
    Rod-shaped
  • What is a key feature of Mycobacterium's cell wall?
    Rich in lipids and mycolic acid
  • What staining method is used for Mycobacterium?
    Ziehl-Neelsen staining
  • How long can Mycobacterium survive in the environment?
    For months
  • What type of media do pathogenic Mycobacterium species require?
    Complex egg-enriched media
  • How do pathogenic Mycobacterium species grow?
    Slowly, colonies not visible for 3 weeks
  • What is a characteristic of Mycobacterium's resistance?
    Resistant to adverse environmental influences
  • What is Mycobacterium's susceptibility to heat treatment?
    Susceptible
  • Name one closely-related member of Mycobacterium that causes tuberculosis in humans.
    1. tuberculosis
  • What disease does Mycobacterium bovis cause in cattle?
    Tuberculosis
  • Which animals are relatively resistant to Mycobacterium bovis?
    Dogs, sheep, and goats
  • How is Mycobacterium bovis primarily transmitted?
    Aerosol/inhalation of infected droplets