Introduction to Mycology: The Biology of Fungi

Compare bacterial and fungal cells, noting cell wall differences (murein peptidoglycan vs glycan mannan and chitin), ribosomes (70S vs 80S), and eukaryotic nuclear material.

Explore why antibiotics fail against fungi by examining fungal cell wall composition, notably chitin, and the eukaryotic cell features such as nucleus and organelles that distinguish fungi from bacteria.

Study fungal morphology, including yeast and molds, hyphae and mycelium, septa, and vegetative versus aerial structures. Identify how cell wall polysaccharides and nuclei shape growth and ecology.

Trace the history of medical mycology from ancient observations of fungal diseases to modern AIDS-era opportunistic infections, including candidiasis and aspergillosis, and advances in rapid diagnostics and antifungal testing.

Explore pathogenic fungi, their eukaryotic cells with nuclei and mitochondria, growth as mycelium or yeast, dimorphic forms and spores, medical importance, and potential to produce antibiotics like penicillin.

Explore fungal growth, metabolism, and reproduction, including hypha and mycelium development, apical growth, and diverse spore-based strategies that drive decomposer, symbiont, and life chemistry innovation.

Identify fungal growth requirements, including carbon sources, water, and inorganic nutrients, and observe how spores germinate into germ tubes within defined temperature ranges and optima.

Explore fungi metabolism, including processing carbon in insoluble forms, extracellular proteases that degrade proteins to amino acids, and uptake of nitrogen as ammonia, with macro and micronutrients and vitamins.

Explore fungal metabolism as heterotrophs that secrete extracellular enzymes to break down cellulose, lignin, and protein. See fermentation, mycorrhizal interactions, and secondary metabolites like penicillin shape ecosystems and human industry.

Explore three sequential stages of fungal reproduction ending in zygote formation, with basidia bearing basidiospores in aerial fruiting bodies. Note vegetative reproduction via mycelial growth and fragmentation.

Explore fungi as eukaryotes with shared genetics and unique lifestyle differences. See how Saccharomyces cerevisiae serves as a premier model, with haploid and diploid cycles, genome details, and industrial applications.

Explore the major fungal groups and their unique structures, from chytrids with zoospores to zygomycota with zygospores, and ascomycetes and basidiomycota with asci and basidia, plus glomeromycota mycorrhizal relations.

Explore how fungi are classified by morphology, nutrition mode (parasitic, saprophytic, symbiotic), and nucleic acid analysis, with examples like Penicillium, Aspergillus, Candida, and Cryptococcus.

Explore medical mycology, covering pathogenic fungi, disease mechanisms, diagnosis and antifungal therapy, from superficial dermatophytes to systemic infections like histoplasmosis and cryptococcal meningitis, and antifungal resistance.

Investigate bioactive compounds in medicinal mushrooms, including polysaccharides, beta glucan, triterpenes, lectins, phenolics and peptides, with neuroprotection, cancer prevention and treatment, immune modulation, and antimicrobial and antioxidant effects.

Identify how fungi cause infections from superficial to systemic, including mucosal thrush and skin, nail, and hair infections, and how aflatoxins from Aspergillus drive toxic and allergic responses.

Identify blastomycosis as a fungal infection that primarily affects the lungs, can involve skin, and is diagnosed by sputum microscopy, culture, serology, imaging, and treated with itraconazole or amphotericin B.

Examine mycotoxins as toxic fungal metabolites that contaminate food and feed, causing acute and chronic health effects, with sources like aflatoxins and fumonisins, and prevention strategies.

Tinea versicolor is a yeast skin infection caused by Malassezia, producing discolored patches; diagnosed with ultraviolet light and potassium hydroxide microscopy, treated with topical antifungals or selenium sulfide.

Explore tinea pedis, its interdigital and sole involvement, diagnose via potassium hydroxide skin scrapings, and treat with topical antifungals or oral itraconazole if needed.

Explores candida albicans, the leading cause of human candidiasis, its yeast and filamentous forms, culture methods, germ tube test, and antifungal treatments.

Histoplasmosis is a fungal infection caused by inhaling airborne spores from soil contaminated with bat droppings or caves; it is not transmitted from person to person.

Explore tinea capitis, tinea corporis, and onychomycosis, their scalp, skin, and nail symptoms, diagnosis by microscopy and culture, and treatment options including laser therapy.

Explore how inhaled Aspergillus causes aspergillosis, including acute invasive aspergillosis, allergic aspergillosis, and chronic necrotizing pulmonary aspergillosis; identify risk factors, symptoms, diagnosis, and treatment options.

Identify tinea cruris as a groin fungal infection common in men, with a scaly, itchy inguinal rash diagnosed by skin scraping and treated with itraconazole; risk factors include occlusive clothing.

Examine cryptococcosis caused by Cryptococcus neoformans, including habitat, inhalation exposure, CNS disease, diagnosis by CSF agglutination and immunofluorescence, and treatment with amphotericin B and fluoro cytosine.

Explore paracoccidiomycosis, a fungal infection common in Latin America, and learn how granulomas and giant cells harbor numerous fungi for routine morphological identification.

Learn laboratory methods for diagnosing fungal diseases, including sample collection, microscopy, culture and serological identification, plus molecular techniques like polymerase chain reaction for Candida and Aspergillus.

Explore antifungal pharmacology, resistance, and standardized susceptibility testing, including minimum inhibitory concentration and microdilution methods used to guide therapy for yeast and molds.