Difference between revisions of "Sporothrix schenckii"
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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 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]] | [[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'' | + | *''Sporothrix schenckii'' |
*Occurs in soil, wood and vegetation | *Occurs in soil, wood and vegetation | ||
| Line 17: | Line 20: | ||
**Nodules ulcerate discharging pus | **Nodules ulcerate discharging pus | ||
| − | *Spread via the [[Lymphatic System | + | *Spread via the [[Lymphatic System - Anatomy & Physiology|lymphatics]] |
| − | *The [[Bones - Anatomy & Physiology|bones]] and viscera can be involved which terminates in mortality | + | *The [[Bones and Cartilage - Anatomy & Physiology|bones]] and viscera can be involved which terminates in mortality |
**This is rare | **This is rare | ||
**Reported in dogs and horses | **Reported in dogs and horses | ||
Revision as of 11:33, 30 June 2010
- 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 lymphatics
- The 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 epizootic lymphangitis in horses
- Single cell, cigar shaped
- Usually found within 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
- At 37°C:
- Potassium iodide treatment orally
- 5-fluorocytosine and amphotericin B can also be used