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Flashcards in mycoplasma Deck (20):
1

discuss the preferable climatic conditions for aspergillosis

  • it is a pre and post harvest contaminant
  • prefers high temps
  • tropical and subtropical climates

2

this mycoplasma prefers hot climates(tropical and subtropical)

aspergillosis

3

this mycoplasma is a storage mould

  • pennicillin
  • optimal growth = 16-28 degrees
  • they are able to adapt to low pH environment (silage)

4

Most important phytopathogenic fungal genus

  • fusarium
  • Invasion and toxin formation on the living plant

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5

mycoplasma which are Environmental „contaminants“:
in houses, stables, decaying material

  • Rhizopus stolonifer
  • Alternaria alternaria

6

what are the lesions of aspergillosis fumigatous in cattle

  • omasum > rumen > reticulum
  • necrohemorrhagic lesions, neutrophilia,thrombosis, pneumonia
  •  mycotic abortion
  • mycotic mastitis
  • Toxico-infections: Mould detectable in the tissues

7

a fungus that causes Respiratory diseases in horses

  • A.fumigatous
  • Hay and straw & indoor environment
  • Fungal spores (A. fumigatus) & Recurrent Airway Obstruction (RAO)

8

the invisible moulds in grass and hay

Endophytes

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9

list all the lesions/cs of ERGOTAMINE/Equine Fescue Toxicosis:

  • abortion
  • •prolonged gestation
  • •premature separation of the chorionic membrane
  • •thickened placenta
  • •retained placenta
  • •agalactia (suppression of lactation)

10

effects of ergotamine in cattle

  • fescus foot
  • heat intolerance
  • very poor quality meat

11

this mycotoxin is an Inhibitor of Ca++-activated K+ channels.

lolitum B

12

when do u get to see cs in lolitrum B toxin

  • > 1.2 ppm Lolitrem B visible clinical symptoms
  • < 0.8 ppm no clinical symptoms
  • cause staggers syndrome
  • Lolitrem B concentrations
    decrease during storage
    5.6 → 0.9 ppm
    (within 3 months)
  • Rate of degradation
    depends on storage
    conditions
  • Ataxia & Instability decrease within 48hrs after hay withdrawal
  •  Full recovery>6 weeks
  • When diagnosed correctly,
    Lolitrem intoxications
    are completely reversible

13

DDx: Neuro-degerative diseases in horses

  • Equine Herpes Virus Infections (EHV-1)
  • Equine degenerative myelo-encephalopathy
  • Polysaccharide storage myopathy
  •  Iliac thrombosis
  • Equine motor neuron disease (EMND)
  •  Grass sickness (EGS)

Equine dysautonomia
Cl. botulinum type C
(Group III) Toxin ?

14

example of Endophytes in Legumes

Slaframine

15

cs of Slaframine

  • Salivation
  • Anorexia
  • Diarrhea
  • Loss of body condition

16

  • characteristics of Fungal exotoxins

  • Diverse chemical structures > 800 different toxins
  •  Low molecular weight haptens, non-immunogenic
  •  High lipophilicity high bioavailability (except: FB1)
  •  Physical stability heat resistance UV labileirradiation (environment: no item)
  •  (Bio)chemical stability pH-tolerance
    •  enzymatic degradation
    • biotransformation
    • glycosinolation (masked mycotoxins

 

  • Biological function: increase in competitiveness

17

effects acute intoxication of mycotons in fish and chicken

Acute intoxications:

  • Bile duct proliferation
  • Fatty infiltration (pale livers)
  • Reduced Vitamin A content
  • Immunosuppression

18

cs of turkey x dz

  • Weight loss
  • Reduced feed conversion
  • Anorexia
  • Jaundice
  • Depression

19

effects of ocratoxins

  • Nephrotoxicity
  • Polydipsia / Polyuria
  •  Growth retardation
  •  Hypothermia
  •  Immuunsuppression
  •  (Teratogenicity ?)
  •  Humans: Balkan endemic nephropathy

and UTT

20

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