Fungi

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Author:
HuskerDevil
ID:
41446
Filename:
Fungi
Updated:
2010-10-11 18:07:13
Tags:
DPAP2012 Microbiology Fungi
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Description:
Microbiology Fungi
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  1. Malassezia
    Superficial infection
  2. Dermatophytes
    • Cutaneous infections
    • "Tinea" = ringworm (dirt, humans, animals)
    • Scalp- treat with systemic meds
    • Everywhere else- treat with topical meds
  3. Dermatophyte species
    • Trichophyton species
    • Epidermophyton floccosum
    • Microsporum species
  4. Non-dermatophytes
    • Cutaneous infections
    • Candida
    • Multiple species cause onychomycosis (nail infection)
  5. Subcutaneous infections
    • rare, skin diseases by transplantation
    • Sporotrichosis
    • -not in US
  6. Systemic mycoses
    All dimorphic fungi except sporotrichosis can cause systemic disease, plus others
  7. Aspergillus
    • Systemic
    • Immunosuppressed
    • Immunocompetent- can cough up blood, but not bad
    • Neutropenia- grows everywhere BAD
  8. Candida
    • Systemic
    • Invades deep and multiple tissues and organs
    • Endogenous- breaching of mucosal barriers
  9. Cryptococcus neoformans
    • Systemic
    • Yeast meningitis
  10. Fusarium
    • Systemic mold
    • Conjunctivitis
  11. Pneumocystiasis
    • Systemic
    • Immunocompromised
  12. Yeast
    • Nonfilamentous
    • Unicellular
    • No true hyphae
  13. Malassezia furfur
    • Yeast
    • Thick walled with short pseudohyphae
    • Lipophilic
    • Discoloration
    • Treated topically or keto? sweat it out
    • "spaghetti and meatballs"
  14. Mold
    • Gram positive
    • Non-pigmented aka hyaline
    • Fusarium- conjunctivitis
  15. Dimorphic fungi
    • Found in nature
    • Bird/bat droppings
    • Yeasts at 37 degrees
    • Molds at 25 degrees
    • Primary exposure is pulmonary and usually asymptomatic or mild
    • Disseminated = deadly
    • Geographically restricted
  16. Histoplasma capsulatum
    • Dimorphic fungi
    • Eastern US and Caribbean
  17. Sporothrix
    • Dimorphic fungi
    • Outlier*
    • Everywhere
    • Soil organisms
  18. Coccidioides immitis and posadasii
    • immitis = California
    • SW and Northern Mexico
    • Desert Fever
    • Nastiest- BAD infection
    • Inhalation of a few spores can cause disease
  19. Paracoccidioides
    • South America
    • Central America
  20. Penicillium Marneffei
    • Thailand and SE Asia
    • HIV positive
  21. Meningitis
    • Streptococcus pneumoniae
    • Neisseria meningitidis
    • Listeria
    • Cryptococcus neoformans

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