Test 2- Proteus

Question 1

Proteus general

Answer 1

• Swarming bacterium:
• Causes difficulties as contaminant (intestine, environment) in bacteriological diagnosis by culture
• Post mortem XXX- post-mortem containment
• Facultative symbiont
• Facultative pathogen
• Otitis & cystitis Dog (P. mirabilis)
• P. mirabilis, P. vulgaris

Question 2

Otitis dog

Answer 2

• Primary pathogens

• Staphylococcus pseudintermedius

• Malassezia pachydermatis

• Treatment but still with damage, then

——— Proteus vulgaris

——— Pseudomonas aeruginosa

• Predisposing
• Frequent swimming
• Breeds with long hanging ears
• Breeds with hair in external ear channel

Question 3

Otitis dog treatment

Answer 3

• Local oil based antibiotic/antimycotic mixture
• Gram positive_: bacitracin_
• Gram negative: colistin, gentamicin
• Antimycotic: nystatin
• Elimination of primary cause
• Foreign body in ear (grass, hay, straw,…)
• Disturbance of keratinization (endocrinology: hypothyroidea, hyperadrenocorticism,… )
• Immune mediated: food allergy, atopic dermatitis, autoimmune,…
• Ectoparasites
• Otodectescynotis(earmite)
• Otobius canis (ear tick)
• (Demodex)
• Anatomical predisposition: ear conformation (hanging ears, hair)

Question 4

Morganella

Answer 4

• Occasionally found in guinea pigs]
• Natural resistance to ampi/amoxy
• Chromosomal β-lactamase