Bacterial infections Flashcards
(21 cards)
Which bacteria can be found as a commensal within the skin, oral cavity, and GI tract of dogs and cats?
Enterococci
Which is the most common commensal enterococci species in dogs
E. facecalis
Which is the most common commensal enterococci in cats
E. hirae
What is the bacterium responsible for necrotizing fascitits?
Streptococcus canis
Which antibiotic would show up a susceptible on a culture for enterococcal bacteria, but is actually not efficacious for this bacteria?
Trimethoprim sulfate
What is the gene possessed by some staphylococcus isolates that allows them to be resistant to beta-lactams?
MecA
What is the most common staphylococcus species isolated from dogs?
S. pseudointermedius
Is s. pseudintermedius a commensal organism of the dog skin?
Yes and the mucus membranes (nares and anal mucosa)
What is a component in gram-negative bacteria that leads to potent virulence?
LPS
Mycoplasmas are harbored in the ______ in almost all dogs and cats.
Respiratory tracts
Which drug classes should be used to treat mycoplasmas? Why?
Tetracyclines or fluroquinolones. They lack cell wall, so beta-lactams are ineffective
What is a bacteria that can cause hemolytic anemia in cats?
Mycoplasma haemofelis
What are two other potential infections that may make a cat have a higher risk factor for m. haemofelis?
FeLV, FIV
Can you culture mycoplasma haemofolis?
No
What is the treatment of choice for mycoplasma haemofelis?
Tetracyclines or fluoroquinolones
What is one potential adverse effect of enrofloxacin in cats?
Diffuse retinal degeneration and acute blindness
What is a common radiographic finding in cats with m. haemofelis?
Splenomegaly
Which bacteria is seen most often following an exposure to penetrating plant foreign bodies in dogs (grass awns) and bite wounds in cats
Actinomyces
Can actinomyces effect the brain?
Yes - pyogranulomatous CSF
Where is actinomyces a commensal organism in the dog?
Oral cavity
