Microbiology review powerpoint Flashcards
Subcutaneous fungi
Chromoblastomycosis, Sporotrichosis, Mycetoma (eumycotic), Phaeohyphomycosis
Opportunistic fungi
Aspergillosis, Candidosis, Cryptococcosis, Geotrichosis, Mucormycosis, Fusariosis, Trichosporonosis, and others
Systemic fungi
Aspergillosis, blastomycosis, candidosis, coccidioidomycosis, Adiaspiromycosis, Emmonsiosis, Histoplasmosis, Cryptocococcos, Geotrichosis, Paracoccidioidomycosis, Mucormycosis, Fusariosis, Trichosporonosis
Samples
CSF blank
Blood blank
eye scrapping blank
1.)CSF (should never be refrigerated),
2.)Blood (lysis centrifugation system to recover dimorphic fungi),
3.)Eye scrapping (media without cycloheximide),
Hair skin and nail scrapping blank
Vignial samples blank
time of urine not accepted
Other specimen types
Mycosel agar is satisfied for
Add Olive or olive oil for
1.)Hair, skin and nail scrapping (Mycosel agar is satisfactory for dermatophytes, add olive oil or olive oil saturated paper to recover M. furfur)
2.)Vaginal samples
3.)Urine: 24-hr urine is not accepted.
4.)Tissue, bone marrow and sterile body
Saprobic and pathogenic fungi agar
BHI, Potato flake agar (PFA), Sabouraud dextrose with BHI
Yeast and filamentous fungi agar
Chromogenic agar
Dermatophytes agar
Mycosel agar, BHI with antibiotics, Inhibitory mold agar (IMA), Dermatophyte test medium (DTM), Yeast-extract phosphate agar
BHI biphasic media
fungi from blood
Differential media
AA agar
Acetate ascospore)
Differential media
Christensen urea agar
Cryptococcus, Trichosporon
Cornmeal agar with tween 80 and trypan blue
Differential media
Chlamydospore from C. albicans
Cottonseed conversion agar
Differential media
Dimorphic fungi
Niger seed agar (Birdseed agar)
Differential media
Cryptococcus
Potato dextrose agar
Differential media
The pigment produced by T.rubrum
urea agar
Differential media
Urea positive fungi
Cryptococcus, T. mentagrophytes and Trichosporon. Urease negative: T. rubrum
Direct microscopic detection of fungi
KOH preparation
Saline wet mount: Fungal elements
Calcofluor white stain
India ink stain: Cryptococcus in CSF
Direct microscopic detection of fungi
blank cotton or blank blue what
Lactophenol cotton or aniline blue wet mount
Direct microscopic detection of fungi
Masson Fontana stain
Masson-Fontana stain: melanin pigment in fungal cell wall
Direct microscopic detection of fungi
Methenamine silver stain
Methanamine silver stain: Fungi in tissue
Direct microscopic detection of fungi
PAS stain
Periodic acid Schiff (PAS) stain
Yeast like fungi
Histoplasma capsulatum, Sporothrix spp., cryptococcus spp. M furfur, blasomyces spp, Paracoccidioides brasiliensis.
Sherules
: Coccidioides spp
Yeast and pseudohyphae
Yeast and hyphae
Candida spp. (except C. glabrata)
Yeast and hyphae: M. furfur
Paucispetate hyphae
Mucor, Rhizopus and other genera
Broad ribbon ribbon like hyphae
Hyaline septate hyphae
Dermatophytes, Aspergillus, Geotrichum spp., trichosporon spp.
Dematiaceous septate hyphae
Bipolaris, Cladosporium, curvularia, exophiala, hortaea, phialophora
Scelortic bodies
(thick-walled cells with transverse septations, round, brown): Cladosporium carrionii, Fonsecaea compacta, F. pefrosoi, Phialophora verrucose, Rhicocladiella aquaspersa
Granules
Acremonium, Aspergillus nidulans, curvularia, Exophiala, Fusarium, Madurella etc
Foot cell
Is where spores develop
Clamydospore in the class description
Septum becomes thick
Cryptococcus have
Capsules
Exo antigen tests
Like an immunodiffusion test
Detects fungal antigen
Need to know antigen to find antibody
or
Need to know antibody to find antigen
Tease specimen to
Spread out specimen
If fungus produces spores then place inside class
2 safety cabinet
Aspigillus fumigates have what toxin
Elastase to break down elastin
Parricoccidoises release
Proteases
Arthroconnidia
Separate septum from hyphae
37C
Creamy white colony
25C
Different colony morphology
Blastomyces stain and come from blood to peripheral what and deposit into what
Red
Circulation
Skin
Histoplasma have what zone
Clear
Histoplasma stains
PAS and Gomori stain
Yeast may be what
Acid fast
How to differentiate fungus
Based on temperature or incubate
Morphology of fungus depends on
Temperature
Biseriate have
Metulae= clear out layer
Macroslamidya and Microclamidya are not apart of
Hypae
Ascocarp
Area that surrounds spores
Ascospores are
Sexual
Coccidiosis species are
Groups of yeast
Masson stain is a
Cutaneous fungus stain
KOH dissolves what
Tissue samples
After KOH go to
wet mount
T rubrum
urease negative
T mentographytes
urease positive
Fungus can be inside what a lot
WBCs