Key Terms
Fungi
Malassezia is the most common fungus in normal skin microbiota.
Viruses (virome)
Circoviridae, Papillomaviridae, and Polyomaviridae are most common in healthy skin. Role of viruses in microbiota is sti
Abscess
Localized collection of pus Bulla (pl. bullae): fluid-filled blister; 5 mm or MORE in diameter Carbuncle: deep pus-fille
Suppurative
Pus-producing (these two terms mean the same thing)
Pustule
Fluid- or pus-filled bump on skin Pyoderma: any suppurative (pus-producing) infection of the skin Ulcer: break in the sk
Tear chemicals that prevent infection
Defensins, lactoferrin, lysozyme; mucins facilitate removal of microbes from eye surface.
Conjunctiva
Mucous membrane covering the eyeball surface and inner eyelid. Has normal microbiota; 12 genera consistently present (pe
Vitreous humor
Watery material inside eyeball; protected from environment; almost always sterile — NO normal microbiota.
Contact lenses
Introduce another surface; can alter normal conjunctival microbiota; associated with increased disease risk.
Conjunctivitis
Inflammation of the conjunctiva (pinkeye)
Blepharitis
Inflammation of the eyelids Keratitis: inflammation of the cornea Keratoconjunctivitis: inflammation of both cornea and
Dacryocystitis
Inflammation of the lacrimal sac; often when nasolacrimal duct is blocked
MRSA decolonization methods
Chlorhexidine washes; intranasal mupirocin.
Lab ID for streptococci
Agglutination reactions, ELISAs; bacitracin susceptibility for S. pyogenes (0.04 units); Lancefield grouping.
Lab ID
Blood agar colonies have rough texture, serrated edges, eventually form an undulating band.