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mycology
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HISTORY… 150 YEARS BACK AUGUSTINO BASSI in Italy established that a fungus Beauveria bassiana was cause of disease in silk worm
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In 1910 RAYMOND JACQUES SABOURAUD published monumental work on dermatophytes “LESTEIGNES” He is known as FATHER OF MEDICAL MYCOLOGY
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Les Teignes lesions
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Many modern molecular techniques and others were developed to study the medical mycology but some are still in darkness… ex:1.classification of parafungal organisms 2.some organisms such as Lacazia ioboi cultures are not done successfully
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Ecological group of fungi
1.Soil fungi 2.Aquatic fungi 3.Coprophilus fungi 4.Entomogenous fungi 5.Predacious fungi 6.Marine fungi 7.Osmophilic fungi 8.Thermophilic fungi
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DEFNITION The branch of biology which deals with study of fungi mushroom=mykes =fungi in Latin
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MEDICAL MYCOLOGY Study of fungal Epidemiology Ecology Pathogenesis
Diagnosis Treatment In humans.
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Myco as misnomer… prefix “Myco” has been given to few bacteria
ex: Mycoplasma mycobacterium mycosis fungoides ???
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MORPHOLOGY Fungi are eukaryotic protista
rigid cell wall =chitin,mannan, polysaccharides cytoplasm membrane=sterols contains true nucleus, nuclear membrane, paired chromosomes.
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Glossary unicellular budding yeast HYPHAE
MYCELIUM (vegetative and aerial) SPORANGIOSPORES CONIDIA CONIDIOPHORES ASCOSPORES BASIDIUM
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CLASSIFICATIONS… MORPHOLOGICAL TAXONOMICAL
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Morphological classification
NAME EXAMPLE 1.Yeast Cryptococcus neoformans 2.Yeastlike Candida sps 3.Moulds dermatophytes 4.Dimorphic blastomycetes
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Method of reproduction
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Several fungal infections are emerging…
WHY???
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PREDISPOSING FACTORS 1.More aggressive treatment modalities 2. Immunocompremised 3.AIDS 4.Prosthetic devices 5.Antibiotics 6.Iv drug abusing 7.Catheter usage
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These predisposed factors leads to increased chances of fungal infections…
The same fungal agent can produce different manifestations depending on underlying situation
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Based on the wide spectrum of adaptability various fungi are categorized in to
1.pathogenic fungi 2.opportunistic fungi 3.toxigenic fungi 4.allergenic fungi
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Based on primary site of infection 1
Based on primary site of infection 1.superficial mycosis tinea or ring worm 2.cutaneous mycosis dermatophytosis 3.sub cutaneous mycosis mycotic mycetoma 4.systemic mycosis coccidiomycosis 5.opportunistic mycosis aspergillosis
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EMERGING AND REMERGING DISEASES
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Out breaks due to fungal infections do occur but only in SPORADIC forms and epidemic have not been reported ex :incidence of cryptococcal meningitis cases by cryptococcus neoformans has increased 1000fold in new York city alone
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LABORATORY DIAGNOSIS 1.DIRECT MICROSCOPY KOH preparation Calcoflour white Gram staining Indian ink preparation
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CULTURE: SDA agar BHI agar czapek dox medium corn meal agar incubated at22c for 1wk identification
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3. Serological tests : agglutinations CFT,CIE ELISA,RIA 4
3.Serological tests : agglutinations CFT,CIE ELISA,RIA 4.Skintests:histoplasmin test 5.Molecular methods: PCR,DNA probes 6.Typing methods 7.Animal inoculation
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SIGNIFICANCE OF FUNGI
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USES 1.Recycling 2.As food 3.Flavouring agents 4.Russian or Manchurian tea 5.Fermentation 6.Antibiotic preparation 7.ergot-claviceps(as vasoconstricting agent) 8.Vaccine preparation and many more….
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Harmful effects 1.Fungal diseases 2.Mycotoxicosis 3.Mycetismus 4.Bread moulds 5.Biological warfare's
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