Difference between revisions of "Subcutaneous Mycoses"

From WikiVet English
Jump to navigation Jump to search
(Redirected page to Category:Subcutaneous Mycoses)
 
(4 intermediate revisions by the same user not shown)
Line 1: Line 1:
{{unfinished}}
+
#REDIRECT[[:Category:Subcutaneous Mycoses]]
 
 
{{toplink
 
|backcolour =
 
|linkpage =Fungi
 
|linktext =FUNGI
 
|pagetype=Bugs
 
}}
 
<br>
 
 
 
[[Chromoblastomycosis]]
 
 
 
 
 
 
 
[[Chromomycosis]]
 
 
 
 
 
 
 
[[Epizootic Lymphangitis]]
 
 
 
 
 
[[Eumycotic Mycetoma]]
 
 
 
 
 
==Hyphomycosis==
 
 
 
*''Hyphomyces destruens''
 
 
 
*Opportunistic infection
 
**Associated with trauma
 
 
 
*Rare
 
 
 
*Caused by ''Penicillium, Beauveria, Acremonium, Fusarium, Paecilomyces''
 
 
 
*Infects both animals and humans
 
**Mainly affects horses
 
 
 
*Tropical and semi-tropical countries
 
 
 
*Progressive disease causing granulating and ulcerating lesions on the legs and lower body
 
**Lesions grow rapidly
 
**Cause extreme debility
 
 
 
*Occurs in water
 
**Most often seen in ponies with access to ponds
 
 
 
*Chemotactically attracted to horse hair
 
 
 
*Does not respond well to treatment
 
**Radical surgical excision the best method
 
**Experiemental vaccination treatment is currently underway and has shown promising results
 
 
 
==Pythiosis==
 
 
 
*Causes Mycotic Swamp Fever
 
 
 
*Also called phycomycosis
 
 
 
*Occurs in the USA, Australia, New Guinea, India, Brazil, Colombia, Japan, Costa Rica and Indonesia
 
 
 
*''Pythium insidiosum''
 
 
 
*Enters via wounds
 
**[[Lips - Anatomy & Physiology|Lips]], [[Musculoskeletal System - Anatomy & Physiology#The Head and Neck|head]], [[Musculoskeletal System - Anatomy & Physiology#The Head and Neck|neck]], fetlock, hock and [[Hoof - Anatomy & Physiology|hoof]]
 
 
 
*Granulomatous infection
 
**Necrosis and fistulous tracts
 
**Yellow lesions
 
 
 
*Branching, separated fungi
 
 
 
*Progressive (rather than systemic) disease
 
 
 
*Surgery is needed
 
 
 
==Rhinosporidiosis==
 
 
 
*''Rhinosporidium seeberi''
 
 
 
*Lives in water
 
 
 
*Causes a chronic, benign disease
 
 
 
*Affects cattle, mules, horses, dogs and humans
 
 
 
*Causes polyps on the [[Nasal cavity - Anatomy & Physiology|nasal]] and [[Eye - Anatomy & Physiology|ocular]] mucous membranes
 
**Over 90% of cases affecting the [[Nasal cavity - Anatomy & Physiology|nasal]] mucous membranes affects male animals
 
 
 
*Occurs most frequently in tropical countries
 
**Also common in the USA
 
 
 
*Large sporangia can be seen on wet mounts
 
**Endospores visible
 
**Sporangia develop into small, globose spores
 
 
 
*Treatment is by surgical excision
 
 
 
==Sporotrichosis==
 
[[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
 
 
 
==Further Links==
 
*Pathology of [[Mycotic skin infections - Pathology#Subcutaneous mycoses|subcutaneous mycoses]]
 
 
 
*[[Antifungal Drugs]]
 

Latest revision as of 13:38, 29 April 2010