Sporothrix schenckii

Sporothrix schenckii

MOD

MOD

Bacterial structure and functions
Staphylococcus aureus
Staphylococcus epidermidis
Staphylococcus saprophyticus
Streptococcus pyogenes (Group A Strep)
Streptococcus agalactiae (Group B Strep)
Streptococcus pneumoniae
Streptococcus viridans
Enterococcus
Bacillus cereus (Food poisoning)
Bacillus anthracis (Anthrax)
Clostridium difficile (Pseudomembranous colitis)
Clostridium botulinum (Botulism)
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Corynebacterium diphtheriae (Diphtheria)
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Moraxella catarrhalis
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Yersinia enterocolitica
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Helicobacter pylori
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Legionella pneumophila (Legionnaires disease and Pontiac fever)
Haemophilus influenzae
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Yersinia pestis (Plague)
Francisella tularensis (Tularemia)
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Chlamydia trachomatis
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Fever of unknown origin: Clinical
Rickettsia rickettsii (Rocky Mountain spotted fever) and other Rickettsia species
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Viral structure and functions
Herpes simplex virus
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Human herpesvirus 6 (Roseola)
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Sporothrix schenckii
Coccidioidomycosis and paracoccidioidomycosis
Candida
Histoplasmosis
Blastomycosis
Cryptococcus neoformans
Aspergillus fumigatus
Mucormycosis
Pneumocystis jirovecii (Pneumocystis pneumonia)
Actinomyces israelii
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Giardia lamblia
Cryptosporidium
Naegleria fowleri (Primary amebic meningoencephalitis)
Acanthamoeba
Trichomonas vaginalis
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Plasmodium species (Malaria)
Babesia
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Ancylostoma duodenale and Necator americanus
Strongyloides stercoralis
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Enterobius vermicularis (Pinworm)
Trichinella spiralis
Schistosomes
Prions (Spongiform encephalopathy)
Marfan syndrome
Ehlers-Danlos syndrome
Huntington disease
Familial hypercholesterolemia
Cystic fibrosis
Phenylketonuria (NORD)
Tay-Sachs disease (NORD)
Gaucher disease (NORD)
Mucopolysaccharide storage disease type 1 (Hurler syndrome) (NORD)
Mucopolysaccharide storage disease type 2 (Hunter syndrome) (NORD)
Niemann-Pick disease types A and B (NORD)
Niemann-Pick disease type C
Glucose-6-phosphate dehydrogenase (G6PD) deficiency
Glycogen storage disorders: Pathology review
Fragile X syndrome
Angelman syndrome
Prader-Willi syndrome
Klinefelter syndrome
Turner syndrome
Down syndrome (Trisomy 21)
Edwards syndrome (Trisomy 18)
Patau syndrome (Trisomy 13)
DiGeorge syndrome
Type I hypersensitivity
Type II hypersensitivity
Type III hypersensitivity
Type IV hypersensitivity
Systemic lupus erythematosus
Graft-versus-host disease
Limited systemic sclerosis (CREST syndrome)
Sjogren syndrome
Immunodeficiencies: T-cell and B-cell disorders: Pathology review
Immunodeficiencies: Combined T-cell and B-cell disorders: Pathology review
Amyloidosis
Transplant rejection
Chediak-Higashi syndrome

Flashcards

Sporothrix schenckii

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Questions

USMLE® Step 1 style questions USMLE

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A 29-year-old man comes to the office for evaluation of a rash on his right upper extremity. The rash first appeared as a solid raised lesion on the right hand. Over the course of two days, it has grown and ulcerated. He reports serous fluid drainage from the ulceration. Two similar lesions appeared near the original lesion today. He does not report dyspnea, fever, chills, cough, or malaise. The patient recently started working at a farm. Vitals are within normal limits. Physical examination shows several indurated, mildly tender erythematous nodules on the right hand and forearm with central shallow ulceration. There is no lymphadenopathy. Which of the following best describes the characteristics of the infectious organism causing this presentation?  

Key Takeaways

Sporothrix schenckii is a fungus that can be found in soil as well as in living and decomposing plant material such as peat moss. It is known to cause a skin infection known as sporotrichosis, which is also called rose gardener's disease.

Sporotrichosis typically begins as a small bump or nodule at the site of the skin injury and can then spread to nearby lymph nodes, causing them to become swollen and tender. Over time, the infection can progress and form a chain of nodules along the lymphatic vessels, creating a pattern that is sometimes referred to as "sporotrichoid spread." Sporotrichosis can be more severe in individuals with weakened immune systems, and in rare cases, it can affect the lungs, the bones, and the brain.

Sporotrichosis is diagnosed through history, physical exam, and a culture of the infected tissue or discharge. Treatment may involve antifungal medications, such as itraconazole, and in some cases, surgical removal of the infected tissue may be necessary.