Mycota Flashcards
no inhalational hazard
yeasts
yeasts
c. albicans
cryptococcus
penicillium marneffi
only invasive penicillium
aspergilloma
occurs in immunocompetent (and compromised) people -forms a fungal ball in pre-existing pulmonary cavity)
Usually infects by inhalation, but also by dog bites and wood slivers
blastomyces dermatitidis
common flora yeast
C. albicans
45 degree angle hyphae splits, then parallel
aspergillus
fungus that can disseminate into the RES
histoplasmosis
begins in nasal cavity due to nasogastric tubes in immunocompromised patients. rapidly spreading, poor prognosis.
Mucormycosis
Cryptococcomata
Intracerebral mass lesions
Liver cancer
aflatoxin from a. flavus
ascospores
sexually formed spores
Mucormycosis
caused by mucorales species (wide hyphae, no septa)
satellite lesions with a silvery sheen
C. albicans
sporangea
the head of a mold
transmitted by inhalation of airborne spores from soils
dimorphic fungi
Forms mycelium (structurally)
hyphae
Green mold on bread
Penicillium
athough asymptomatic, can cause scarring of the lungs which looks like tuberculosis.
histoplasmosis
where does tinea pedis begin?
between the pinky and ring toe
What is larger, yeast or bacteria?
Yeast (10x)
Immunocompromised - contracts the aspergillus hyaline mold, what happens?
Mortality > 50%
Dermatophytes
trichophyton species
microsporum species
epidermophyton floccosum
Acquired through aerosolized bird droppings from gregarious birds
Cryptococcus
Aspergillus types
A. flavus
A. fumigatus
A. niger
A. terrous
Brown pigmented molds with septa
dematacious (earthy)
ship’s wheel lesion
paracoccidoides brasiliensis - disseminating to the nose
Aflatoxin
A. flavus infects peanuts and immunocompromised people
Otomycosis
Aspergillus niger
What are most medical molds classified as
hyaline
Immunocompetent - contracts aspergillus, what happens?
chronic sinusitis and aspergilloma
anamorphic
asexual stage name
medusa head appearance
a. flavus
what poses the inhalational hazard of a mold?
stolons
What is ringworm?
Tinea corpus - dermatophyte of the body and not actually caused by a worm
How you get athlete’s foot (tinea pedis)
Walking barefoot and subsequently putting on a shoe
fungi imperfecti
only asexual stage present
releases spores
the mycelium
No need to protect yourself from _____ in a lab
Dermatophytes
Line of lymph nodes
sporotrichosis
3 Bs
blasto, broad-based buds
smoky green/gray fuzzy colonies
aspergillus
Kentucky fungus
histoplasma
grows on a monolayer like a bacteria
yeast
Systemic mycoses
dimorphic fungi
most common mycosis in Central and South america
paracoccidoides brasiliensis
India Ink Prep
Can be used to see capsulized cryptococcus
Most common medical, hyaline mold
aspergillus
Rhizopus, absidia, mucor
Mucorales species causing mucormycosis
Unpigmented hyphae with septa
hyaline molds
what is a sporangium associated with in a mold?
asexual reproduction - colourless when immature, black when ripe
the only intracellular fungus
histoplasmosis
infects macrophages
histoplasmosis
Chronic meningitis in AIDS patients
Cryptococcus (disseminated)
What inhibits the growth of tinea pedis?
toe jam
double-walled wide based budding forms
blastomyces dermatitidis
Wet and weepy mycelial mass on the head
kerion
Colonies appear moist at beginning, but end up looking like spider webs
coccidoides immitis
telomorphic
sexual stage name
rhizoids below sporangiophore
rhizopus
colourless when immature, black when ripe
sporangium
transmitted by soil with bat droppings
histoplasmosis
Is a mushroom a type of mold? Is a dermatophyte a type of mold?
Yes and yes
the most dangerous and infectious of all fungi
coccidoites immitis
C. albicans of the throat
thrush
dimorphic fungi
histoplasmosis
blastomyces dermatitidis
Antler like cigar shaped
epidermophyton flocossum
Fonsecaea pedrosoi
Dematacious mold causing chromoblastomycosis
Mold associated with a very poor prognosis if immunocompromised
Mucorales
Rhizoids
roots of a mold
sporotrichosis
chronic lymphatic and skin infection - sporothrix schenckii
Endogenous yeast
Cryptococcans
Glass-like
hyaline
barrel shaped arthroconidia in the hyphae
coccidoides immitis
stolons
aerosolized hyphae with spores - can pose an inhalational hazard with mold
Chromoblastomycosis
dematacious mold - fonsecaea pedrosoi
Red, cigar shaped
trichophyton (dermatophyte)
no rhizoids
mucor
cutting the lawn
aspergillus
Pointy, cigar shaped
Microsporum (dermatophyte)
Aseptic, wide hyphae is characteristic of…
Mucorales
Rose thorns
sporothrix schenkii
athlete’s foot
dermatophyte tinea pedis
conidia
asexually formed spore
female sex hormones inhibit it
paracoccidoides brasiliensis
most common yeast
C. albican
C. albicans - exogenous or endogenous
Exogenous
Hyaline molds
aspergillus
penicillium
dermatophytes
Requires silver stain for imaging
aspergillus
San Joaquin valley fever from desert winds
coccidoides immities
exporulate by a fairy ring
homobisidiomycetes
dandelion lollipop
a. niger
allergic pulmonary aspergillosis
Aspergillus fumigatus
forms a fungal ball in lung cavities
aspergilla (called an aspergilloma)