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[[Image:Sporotrichosis horse.jpg|thumb|right|150px|Sporotrichosis in a horse -Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath]]
[[Image:Sporotrichosis cigar cells.jpg|thumb|right|150px|Sporotrichosis cigar shaped cells -Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath]]
*''Sporothrix schenckii''

*Occurs in soil, wood and vegetation
**Saprophyte of both decaying and healthy vegetation

*Worldwide

*Exogenous infections through wounds

*Sporadic infections

*Non-contageous

*Causes subcutaneous nodules or granulomas
**Nodules ulcerate discharging pus

*Spread via the [[Lymphatic System - Anatomy & Physiology|lymphatics]]

*The [[Bones and Cartilage - Anatomy & Physiology|bones]] and viscera can be involved which terminates in mortality
**This is rare
**Reported in dogs and horses

*Affects dogs, horses, cats, monkeys, mules, camels, donkeys, cattle, fowl and rodents
**Most commonly seen in horses as an ascending lymphocutaneous infection of the legs
**Can be confused with [[Subcutaneous Mycoses#Epizootic Lymphangitis|epizootic lymphangitis]] in horses

*Single cell, cigar shaped
**Usually found within [[Neutrophils - WikiBlood|neutrophils]]
**Yeast cell clusters with peripheral eosinophilic rays can be seen in tissue sections

*Stained using PAS, Gram stain (positive), fluorescent antibody and Calcofluor White

*Latex agglutination and immunodiffusion serology can be performed

*Grows on Blood agar and Sabouraud's Dextrose agar in one to three weeks
**At 37°C:
***Colonies are smooth, cream to tan coloured and soft
***No mycelium can be seen
**At 25°C to 27°C:
***Colonies turn from white and soft to tan to brown to black
***Leathery, wrinkled and coarse
***Mycelium can be seen as branching septate hyphae
***Conidiospores can also be seen

*Potassium iodide treatment orally
**[[Antifungal Drugs#Flucytosine|5-fluorocytosine]] and [[Antifungal Drugs#Polyene Antifungals|amphotericin B]] can also be used[[Category:Subcutaneous_Mycoses]]
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