Lecture 5: Bacteria Flashcards
What is the usual sole agent of surface pyoderma?
Staph pseudointermedius
Where is S pseudointermedius resident?
Nares, oropharynx, perianal
Which treatment is contra-indicated in most bacterial skin infections?
Steroids
How do you confirm pyoderma?
Cytology from pustule
When do you do C+S in pyoderma?
If rods, lack of response, unusual presentation, deep pyoderma
What is always the cause of pyoderma?
Secondary to something else!
What is the most common cause of recurring pyoderma?
Fleas
What are other causes of recurring pyoderma?
Atopy, hypothyroid, food reactions
What are the first line antibiotics for pyoderma?
Cephalexin, co-amoxiclav, clindamycin, lincomycin
When can you use Convenia (cefovecin) in pyoderma?
If C+S indicates
How does chlorhexidine work?
Coagulates bacterial proteins and degrades membrane
How does benzoyl peroxide work?
oxidising agent that disrupts bacterial cell wall, drying
How does ethyl lactate work?
lipid soluble so penetrates well, degrades to ethanol + lactic acid
Advantages of fusidic acid?
good penetration and no known resistance
