Home > Preview
The flashcards below were created by user
on FreezingBlue Flashcards.
What are some gram + resident microbiota (rarely associated with disease)? (5)
coag-negative staph, Bacillus, Micrococcus, alpha and gamma hemolytic strep, Corynebacterium
What are some gram - resident microbiota (rarely associated with disease)? (2)
Acinetobacter, Pseudomonas (except P. aeruginosa)
What are gram + transient microflora (significant only if associated with disease)? (2)
Coag-positive staph, beta-hemolytic strep
What are gram - transient microflora (significant only if associated with disease)? (2)
Pseudomonas aeruginosa, coliform bacteria
A practitioner takes a surface
swab of this inflamed skin.
Culture returns as:
– S. pseudintermedius: moderate
– Proteus mirabilis: light
– β‐hemolytic Streptococcus sp.:
Which organisms are most
Staph pseudointermedius (b/c is is transient flora that can act as an opportunist)
[strep would be more worrisome if it was from a deep wound]
What are important opportunistic pathogens associated with primary dermatologic disease (superficial)? (2)
coag-positive staph (pseudointermedius), Pseudomonas aeruginosa
What are important opportunistic pathogens associated with wounds (deep derm disease)? (4)
coag-neg staph, Pseudomonas aeruginosa, coliform bacteria, beta hemolytic strep
What are coag-postive staph species? (6)
aureus, intermedius, pseudointermedius, delphini, lutrae, schleiferi ssp. coagulans
What is different about dogs colonized with MRSA than people?
dogs decolonize within 2-3 weeks if removed from environment with colonized person (people are colonized forever)
What are the carriage sites for Staph pseudintermedius in healthy dogs? (4)
nose, mouth, perineum-rectum, and groin
Describe the unique characteristics of Pseudomonas aeruginosa? (4)
intrinsic resistance to many antimicrobial drugs, adept opportunist, can cause green exudate, usually causes deep disease (but can cause superficial
Rapidly progressive infection of subcutis and along fascial planes.
What bacteria is necrotizing fasciitis associated with? (3)
Staph pseudintermedius, beta-hemolytic strep, and very rarely anaerobes (Clostridium)
___________ play a key role in necrotizing fasciitis.
What is the most common cause of NF in dogs?
Beta- hemolytic strep can cause ____________, which leads to __(2)__.
streptococcal toxic shock syndrome; hypotensive shock and multiorgan failure
Why are fluroquinolones contraindicated in toxic shock syndrome?
because they induce the lytic cycle in bacteriophage and release of toxins and enhancement of disease
Definitive diagnosis of NF requires...
clinical signs + histopathology + culture
What is the "finger test"?
when animal is sedated, incise first fascial plane, lack of bleeding and presence of "dishwater" fluid--> push down on fascia--> if it disintegrates with minimal pressure, very suggestive of NF
Chronic deep pyogranulomatous bacterial infections can be caused by... (4)
Actinomycese, Nocardia, rapidly growing Mycobacterium, Corynebacterium pseudotuberculosis
What are the key features of Actinomyces? (3)
normal oral microbiota, strict/facultative anaerobes, associated with non-healing wounds
What are the key features of Nocardia? (4)
ubiquitous in environment, obligate aerobes, associated with non-healing wounds, acid-fast staining
Deep infections with Nocardia require what kind of treatment?
Actinomyces is associated with __________, leading to ___________.
migrating foreign bodies (splinters, grass awns); draining tracts
In order to treat Actinomyces draining tracts, you must...
follow the tract and remove the migrating foreign body.
What are the key features of rapidly growing Mycobacterium? (4)
ubiquitous in environment, non-contagious, obligate aerobes, acid fast
Rapidly growing mycobacterium are _______ to cultivate in the lab; however,...
easy; there are types of Mycobacterium that are "uncultivable"- "skin tuberculosis" of cattle, feline leprosy
What is the etiologic agent of feline leprosy? What are characteristics of this disease?
Mycobacterium lepraemurium- uncultivable mycobacterium- must be diagnosed by histopath with PCR- nodular lesions on extremities
What is the etiologic agent of canine leproid granulomas? What are characteristics of this disease?
uncultivable Mycobacterium- nodular ulcerated masses, esp on ears- spontaneously regress
Ulcerative lymphangitis in horses is caused by _____________; characteristics of this disease include...
Corynebcterium pseudotuberculosis; SHIT test (not very good), culture, caseous lymphadenitis