Myco Flashcards
Compared to bacteria spores in fungi are used for?
Reproduction
Bacteria- survival
Compared to bacteria, fungi’s cell wall contains?
Chitin
Bacteria- peptidoglycan
Fungi are cultured in what medium?
Saburaud’s agar
Diagnosis of fungi can be done using this preparation
KOH preparation
A cutaneous mycoses presenting w/ inflamed circular border containing papules and vesicles surrounding a clear area of relatively normal skin; it has green fluorescence on wood’s lamp
Dermatophtoses( ring worm)
Spaghetti and meatballs appearance on 10% KOH
Malassezia furfur
Occurs most often in gardeners especially those who prune roses; transmitted thru thorn prick
Sporothrix schenckii
Tx: potassium iodide or itraconazole
Transmitted thru inhalation of arthrospore causing valley fever; eryhtema nodosum (desert bump)
Coccidioides immitis
Grows in soil contaminated w/ bird droppings(starlings) or bat guano
Histoplasma capsulatum
Its pathogenesis is that Inhaled microconidia develops into budding yeast inside macrophages
Histoplasmosis capsulatum
Fungi that Closely mimics tuberculosis
Histoplasma capsulatum
Paragonymus- also mimicks ptb
Round yeast with broad based bud
Blastomyces dermatitidis
Most common cause of fungal pneumonia
Blastomyces dermatitidis
Thick yeast w/ multiple buds in wheel configuration (mariner’s or sailor’s wheel)
Paracoccidioides brasiliensis
Only affect males (estrogen inhibits fungus); “man hater fungus”
Paracoccidioides brasiliensis
Lutz splendore de almeida disease
Paracoccidioides brasiliensis
Causes pseudomembranous esophagitis in immunocompromised states
Candida albicans
Curd- like discharge in vulvovaginitis
Candida albicans
Oval yeast w/ wide polysaccharide capsule seen in india ink preparation or nigrosin stain
Cryptococcus neoformans
Grows abundantly in soil w/ bird (especially pigeon) droppings
Cryptococcus neoformans
Septate hyphae that form v shaped dichotomous branches
Aspergillus fumigatus
Fungus ball in lung cavities
Aspergillus fumigatus
Rhino orbital cerebral infection with eschar formation in pxs with DKA, burns or leukemia
Mucormycosis ( rhizopus oryzae and mucor spp)
Most common AIDS defining illness
Pneumocystis jiroveci
What do you call the major membrane sterol of fungi?
Ergosterol
