Mycology Flashcards
The study of fungi; its genetics, biochemical properties, and taxonomy
Mycology
First saw the fungal spores
1588 - Giambatista Della Fort
The development of Mycology
Saw spores and induce growth into fungi
Pierre Antonio Michelis
Century when the ability of fungi to invade animals and plants were discovered
19th century
1st documented animal infection
Bassi
The fungi of the 1st documented animal infection
Beauveria bassiana
Created the specie Plantarum
1750’s - Carl Linnaeus
Established taxonomy of mushroom and the father of Mycology
1761-1836 - Hendrik Persoon
Development of Mycology in the 20th century
Antibiotics
Kingdom
Fungi
Nutritional type; requiring organic compounds for energy and carbon
Chemoheterothrophs
Multicellularity
All except yeast
Cellular arrangement
Unicellular
Filamentous
Fleshy
Reproductive feature
Sexual
Asexual
Food Acquisition
Absorptive (Saprophytic)
obtaining food by absorbing dissolved organic material
Saprophytic
Fungi does not produce _________ for food
Chlorophyll
Oxygen requirement
Aerobic
Facultative
Rarely anaerobic
Components of the cell membranes
Glucan
Mannan
Chitin
Where are sterols found in fungi
Cell membranes
Fungi benefits
Produces food and drugs
Have symbiotic relationship with other plants
Helps farming ants to digest
fungi that have a symbiotic relationship with the roots of many plants
Mycorrhizae
Means the catabolism and growth
Vegetative structure
Parts of Molds and Fleshy Fungi
Thallus
Hyphae
Mycelium
AKA the body; consist of long filaments
Thallus
The long filaments in thallus
Hyphae
internal walls that usually have little pores that are large enough to allow ribosomes, mitochondria and sometimes nuclei to flow among cells
Septa
Hyphae that are divided into cells are called
Septatehyphae
They are one long cell that is not divided into compartments
Coenocytic hyphae
Hyphae for nutrients
Vegetative hyphae
Hyphae for reproduction
Aerial hyphae
a network of fungal threads or hyphae that is visible to the unaided eye
Mycelium
Unicellular ascomycetes, non-filamentous fungi that are powder-like and typically spherical or oval-like molds
Yeast
saccharomyces forms protuberance the other surface and divides unevenly
Budding yeast
1 parent cell of yeast can produce _______ daughter cells
24
divides evenly to produce 2 offsprings
Fission yeast
Another name for Fission yeast
Schizosaccharomyces
The increase of yeast cells in fission yeast produces a colony similar to _______
Bacteria
Yeast metabolic classification
Facultative
Anaerobic
Yeast with oxygen
Performs aerobic respiration to metabolize CHO to carbohydrates
Yeast without oxygen
Ferments CHO to Ethyl Alcohol
CHO components
CO2 and H2O
The most pathogenic classification
Dimorphic fungi
Factors affecting dimorphic fungi
Temperature
CO2
Dimorphic Temperature yeast like
37 celsius
Dimorphic Temperature mold like
25 celsius
CO2 ________ _________ causes change in appearance of fungi
Concentration change
Asexual cycle where spore-producing branches break into fragments and releases spores for germination
For filamentous Fungi
These are called reproductive spores
Fungi spores
Sterols present in fungi
ergosterol
Chitin is also found in
Crustaceans shells
Clams
Synthesis of ergosterol
Squalene -> Lanosterol -> Ergosterol
Squalene -> Lanosterol enzyme
squalene epoxidase
Lanosterol -> Ergosterol enzyme
14α-demethylase
Formed from aerial hyphae
Spores
Reproduction produced by individual fungus and by mitosis and cell division
Asexual
2 types of Asexual spores
Conidiospores
Sporangiospore
These are asexual spores not enclosed in a sac
Conidiospores
2 types of Conidiospores
Arthroconidia
Blastoconidia
Reproduce by fragmentation
Arthroconidia
Arthroconidia example
Coccidioides immitis
Reproduce by forming buds
Blastoconidia
Blastoconidia examples
Candida albicans
Reproduce by forming with sac
Sporangiospore
Sporangiospore example
Rhizopus fungi
Another term for sac
Sporangium
fusion of the cytoplasm of two or more cells as distinguished from fusion of nuclei
plasmogamy
last phase in the process of fusing two haploid eukaryotic cells together during fertilization, and it refers to the fusion of two nuclei in particular.
Karyogamy
restores the haploid number of chromosomes and initiates the haploid phase, which produces the gametes
Meiosis
AKA sac fungi
Sac containing asexual spores
Ascomycota
Ascomycota examples
Morels and truffles
Club-like structure containing asexual spores
Basidiomycota
Basidiomycota examples
Toadstool
Basidium produces what kind of spores
Basidiospores
AKA zygote fungi/zygomycetes
Form a thick-walled spore
Grows on meat, cheese, and bread
Lives in dark, moist, and warm environment
Zygomycota
Zygomycota Example
Rhizopus Stolonifera
AKA Mitosporic and Fungi Imperfecti
Group without asexual spores
Deuteromycota
Deuteromycota examples
Penicillin notatum
Penicillin chrysogenum
Zygomycota spore
Zygospores
Known as brewer’s yeast
Saccharomyces cerevisiae
Unusual eukaryote, lack mitochondria,
Clinical diseases are chronic diarrhea and keratoconjunctivitis
Microsporidia
4 medically important phylla of fungi
Ascomycota
Basiomycota
Zygomycota
Deuteromycota
General term for fungal infection
Mycoses
4 types of mycoses
Superficial
Cutaneous
Subscutaneous
Systemic/deep
fungal infections of the skin, hair, and nail
Superficial mycoses
fungal infections beneath the skin
subcutaneous mycoses
aka dermatophytes
Cutaneous mycoses
Dermatophytes causes
Dermatomycosis
Fungal infection that affects full body system
Systemic mycoses
Allergic reaction
Hypersensitivity
Allergic reaction produces _________ which is cell mediated immunoresponse
Granuloma
Ingestion of food contaminated with fungal toxin
Mycotoxicosis
Amanita mushroom produces
Amanitin and phalloidin
This is coumarin derivative
Aflotoxin
CAuses liver toxicity
Aspergillus flavus
Ingestion of poisonous fungi
Mycestismus
Superficial Mycoses
Black Piedra
White Piedra
Tinea Versicolor
Tinea Nigra
Cutaneous Mycoses identification
KOH Mount
Wood’s lamp
Mucocutaneous Mycoses Clinical diseases
Candidiasis
Oral thrush
Vaginitis
Diaper rash
AKA Rose Gardener’s Disease
Sporotrichosis
Sporotrichosis fungi
Sporothrix shenckii
Subcutaneous mycoses
Chromoblastomycosis
Mycetoma
Sporotrichosis
Respiratory disease but may spread to the skin, bones, and brains
Coccidioidomycosis
Coccidioidomycosis fungi
Coccidioides immitis
Respiratory disease from decaying wood
Blastomycosis
Blastomycosis fungi
Blastomyces dermatitidis
Enlargement of lymph nodes, lesion in the lungs
Paracoccidioidomycosis
Paracoccidioidomycosis fungi
Paracoccidioides brasiliensis
TB like disease from bird and bat dropping
Histoplasmosis
Histoplasmosis fungi
Histoplasma capsulatum
Respiratory disease but may spread to the skin, bones, and brains
Coccidioidomycosis
Opportunistic Pathogens
Candida albicans
Cryptococcus neoformans
Aspergillus flavus
Aspergillus fumigatus
Pneumocystis jiroveci
most common opportunistic fungal infection
acquired through inhalation and IV catheters
Candidiasis
Candidiasis fungi
Candida albicans
Acquired by inhalation of dried plasma dropping and common among patients with aids
Cryptococcosis
asthma-like condition
Aspergillosis
leading cause of death for AIDS pateints
Pneumocystis Carinii Pneumonia
Pneumocystis Carinii Pneumonia Fungi
Pneumocystis jiroveci
Aspergillosis fungi
Aspergillus flavus
Aspergillus fumigatus
Cryptococcosis fungi
Cryptococcus neoformans
Anti fungal based on structures
Polyenes
Allylamines
Azoles
Griseofulvin
Flucytosine
Directly binds to ergosterols
Polyenes
Inhibits squalene epoxidase synthesis
Allylamines
Allylamines DX
Naftitine
Terbinafine
Tolnaftate
Polyenes Dx
Amphotericin B
Nystatin
Natamycin
Inhibits ergosterol synthesis, enzyme 14-a demethylase, CYP 450
Azoles
Azoles Dx
Ketoconazole
Soucre for Amphotericin B
Streptomyces nodosus
Amphotericin B Dx of choice for
Systemic mycoses
Nystatin source
Streptomyces noursei
Nystatin Dx of choice for
Candidiasis
Natamycin source
Streptomyces natalnensis
Natamycin Dx of choice for
fungal conjunctivitis
mucocutaneous candidiasis
Uses mitotic spindle poison
Griseofulvin
Griseofulvin source
Penicillium griseofulvum
Griseofulvum Dx of choice for
Ringworm infection
Inhibits fungal DNA and RNA synthesis
Converted to 5FU
Flucytosine
Griseofulvin must be taken with a ______
fatty
Used to treat seborrheic dermatitis, dandruff, and pityriasis versicolor
Selenium Sulfide
For cutaneous and lymphocutaneous sporotrichosis
KISS
Potassium Iodid Saturated Solution
Given with azoles to decrease its toxicity
Amphotericin B
Best alternative to Amphotericin B for systemic mycoses
Fluconazole
Fluconazole Dx of choice for
Cryptococcosis
Amphotericin B duration of therapy
2 to 3 months
Amphotericin B Adverse Dx Reaction
Reversible Azotemia
amphotericin B form that has less Adverse Dx Reaction
Lipid