Misc
Fungi that take on both yeast and mold phase are called
Dimorphic
A Fungi that causes superficial mycoses which is difficult to culture and microscopically looks like spaghetti and meatballs is
Malassezia furfur
A dimorphic Fungus that causes an infection often referred to as rose gardners disease
Sporothrix schenckii
True or False all of the following are causes of Systemic Mycoses and all are dimorphic
True
Name the fungus seen in picture 1
Absidia
conidiophores can branch into secondary segments that look like vases . These are referred to as:
phialides
What Superficial Fungi causes infection of hair and scalp referred to as tinea nigra
Hortaea werneckii
one of the three black molds that causes Chromoblastomycoses that is described microscopically as having mixed sporulation is
A patient from Ohio presented with pain and loss of function of limbs. A fungus was recovered that microscopically at 37 degrees looked large, thick-walled, single budding cells with a broad isthmus. What is the Fungus
Blastomyces dermatitidis
Name the fungus in picture 2
fusarium
Fungal cultures should be incubated for at least
4 weeks
Which dermatophyte infects infects hair and skin and microscopically best known for large spindle shaped thick wall, macroconidia
Microsporum
The Subcutaneous mycoses that shows sclerotic bodies on histologic exam that look like copper colored pennies is
Chromoblastomycosis
A patient visiting from Brazil presented with sore gums and swollen lymph nodes . A fungus was recovered that had thick walled - multi budding yeast resembling a ships wheel. What was the most likely cause ?
Paracoccidioides brasiliensis
Name the fungus in picture 3
Curvularia
For identification of dermatophytes we use what to dissolve or clear out the keratin
10% KOH
Which dermatophyte typically only infects skin and is seen microscopically many smooth club shaped macroconidia that resemble a beavers tail
Epidermophyton
You recover a Gram positive (weak) branching bacilli on fungal media. It appears negative by
modified Kinyoun. It does not hydrolyze Tyrosine, Casein or Xanthine. What would you report out ?
Nocardia Sp.
When performing a Cryptoccocal antigen test be aware of microglobulins like Rhematoid Factor as they may cause
False +
Name the fungus in picture 4
Aspergillus
Name 2 situations in which we should Identify yeast ?
in sterile site
immunocompromised patient
when no bacterial growth and large yeast
Which dermatophyte genera infects hair , skin and nails and is described microscopically as having
Trichophyton
A patient presents with Swelling, purple-ish discoloration, tumor-like deformity on their foot. You recovered rapidly growing fungi that microscopically appeared as Ascospores and cleistothecia. What Fungi is most likely present ?
Scedosporium complex (formerly pseudoallescheria boydii)
The formation of germ tubes presumptively identifies:
Candida albicans
A respiratory specimen from a Cystic Fibrosis patient grows as a light green mold on SAB.
Which of the following is most likely?
Aspergillus