Skin and Subcutaneous Tissues Flashcards
What bacteria would you find in pyoderma/skin infections?
- coagulase positive staphylococcus
- streptococcus
- corynebacterium
- arcanobacterium
- pseudomonas
- pasturella
- proteus
- E. coli
Which staphylococcus is the most common isolate that is associated with skin disease in dogs?
Staphylococcus pseudointermedius
What is MRSA?
Methicillin resistant Staphylococcus aureus
All staphylococcus isolates which are macrolide (erythromycin) resistant should be considered resistant to what other abx unless otherwise confirmed by D-test?
A. Rifampin
B. Penicillin
C. Clindamycin
D. Ampicillin
C. Clindamycin
Greasy pig disease is also known as…
Staphylococcus hyicus (exudative dermatitis)
Bumble foot (birds) is also known as…
Staphylococcus aureus
Botryomycosis hosts?
Rodents, human and horse
What type of pathogenesis does botryomycosis cause?
Chronic pyogranulomatous inflammation
What is the bacterial isolate of botryomycosis?
Staphylococcus aureus
Types of bacterial skin infections in cats?
- mycobacterial infections (feline leprosy)
- Yersinia pestis (lymph node abscess)
- Pasteurella spp. (cat bite abscess)
- sterile abscess
What are some AEROBIC bacteria that are involved in wound infections, draining tracts and abscesses?
- staphylococcus
- streptococcus
- Corynebacterium
- pasteurella multocida (cats)
- mycobacterium
- actinomycetes
- nocardia
What are some GRAM POSITIVE ANAEROBIC bacteria that are involved in wound infections, draining tracts and abscesses?
Clostridium
What are some GRAM NEGATIVE ANEROBES that are involved in wound infections, draining tracts and abscesses?
- Fusobacterium
- Bacteroides
- Dichelobacter
Which bacteria may potentially cause necrotizing fasciitis and toxic shock syndrome in dogs?
Streptococcus Canis
If you have an abscess how would you want to transport it for diagnostics?
FNA or contents in anaerobic transport medium
Do not submit dry swabs for culture. True or false?
True
If an infection does not respond to ahminoglycosides it indicates to what type of infection?
Anaerobic bacterial infection
How do you collect for anaerobic bacteria?
- disinfect skin surface with 70% OH and allow to dry
- aspirate specimen into the syringe
- remove air from syringe
- ship in anaerobic transport medium
Dogs and cats presented with non-healing, cutaneous lesions and subcutaneous nodules have what type of infection?
mycobacterium infection
What is Cutaneous streptothricosis?
Dermatophilus congolesi (look like tram tracks)
What are the host of Dermatophilus congolensis?
cattle, sheep, goat and horse
This bacterial skin lesion in cattle is called lumpy jaw. What bacterial species and pathogenesis does it present?
- actinomyces bovis
- pyogranulomatous osteomyelitis
What causes foot rot in cattle, sheep and goats?
Fusobacterium necrophorum
What causes facial eczema due to photosensitization?
Mycotoxins (sporidesmin; pithomyces chartarum)
Dermatophytosis infections in dogs?
- Microsporum canis
- Microsporum gypseum
- Trichophyton mentagrophytes
Dermatophytosis infection in cats?
Microsporum canis (asymptomatic carriers)
Dermatophytosis infection in horses?
- Trichophyton metagrophytes
- Trichophyton equinum
Dermatophytosis infection in cattle?
Trichophyton verrucosum
Dermatophytosis infection in pigs?
Microsporum nanum
When dealing with a fungal lesion, where on the lesion should you collect?
A. Center
B. Periphery
B. Periphery
Which fungal infection would you see a fluorescence with?
Microsporum canis
Persian cats have pseudomycetoma a subcutaneous nodule from what bacterial species?
Microsporum canis
Griseofulvin acts against what type of fungus?
- dermatophytes
- PO only
- acts on mitotic spindles
Cryptococcus neoformans infects which parts?
Lungs, CNS, eyes and skin
Blastomyces dermatitidis infects what?
- lungs primary
- skin lesions in disseminated disease
Sporothrix schenckii infects what?
cutaneous and lymphatics
Which has a capsule?
A. Cryptococcus neoformans
B. Coccidiodies immitis
A. Cryptococcus neoformans
Swamp cancer is also known as?
Pythium insidiosum
Streptococcus equi sub equi causes what in horses?
strangles - lymphadentitis
Cornebacterium pseudotuberculosis causes what in horses?
pigeon fever - ulcerative lymphangitis
Sporothrix schenkii causes what in horses?
lymphocutaneous lesions
Burkholderia mallei causes what in horses?
- Glanders (pulmonary or nasal form)
- Farci (skin form)
Burkholderia pseudomallei causes what in horses?
Meliodosis or pseudoglanders
What causes diamond skin disease in pigs?
Erysipelothrix rhusiopathiae
