MYCV (1) Intro to Fungi, Spx, collection, lab tests

Lec

Mycology

study of fungi

Heterotrophic

relies on other sources of organic carbon for nutrition.

Saccharomyces cerevisiae

scientific name of yeast

• Saprophytic

• Parasitic

• Symbiotic

Fungal Nutrition

Saprophytic

the org. feeds on dead matter/rotten material.

Parasitic

Obtain nutrients from living host org.

Symbiotic

they both benefit from each other

Asexual

replicates by itself

Sexual Rep.

needs compatible strains. Adaptability if low nutrients

hypha

Fungi does not have any organs, only tubular filaments called ___

Septated

cross-mold are termed as__

Aseptate/ Coenocytic

hyphae do not have crossmolds

Mycelia

hair-like filaments and if seen MACROSCOPICALY

Mycelia

Nutrient gathering or dissemination of spores

Hyphae

seen MICROSCOPICALLY

Dimorphic

either in yest form / mold

Polymorphic

both yeast and mold form will grow

Exophiala sp.

example of polymorphic

Yeast

Smooth, creamy pasty or mucoid form of fungal growth

Yeast

Reproduce by budding thorugh the formation of blastoconidium (daughter cell).

Molds`

Exhibit filamentous type of growth due to mycelia

• B. dermatidis

• C. imitis

• P. brasiliensis

• M. capsulatum

• S. schenckii

SYSTEMIC (has 5 infection)

• Aerial

• Vegetative

2 types of stucture/ Mycellia

Aerial

anything above surface. possess spores.

Vegetative

grows under the culture media. Absorbs nutrients

• Moisture

• Low light environment

• source of nutrient

Criteria for skin specimen

1,3 B-D Glucan

is a cell wall comonent of many fungiii including Aspergillus and Candida but not found in Cryptococcus spp. or other zygomycete.