Changes

*dog bite to the face or similar wound/cellulitis

*dog bite to the face or similar wound/cellulitis

*bluetongue

*bluetongue

|l1=

|l1= Photosensitisation

|q2=What are the possible causes?   

|q2=What are the possible causes?   

|a2=

|a2=

*Primary photosensitization results when an ingested photodynamic agent in the animal’s body (hypericin from St. John’s Wort (''Hypericum perforatum'') is often quoted) is exposed to ultraviolet light causing fluorescence and death of cells in the skin. The cell necrosis and dermatitis is characteristically most severe in nonpigmented skin. <br><br>

*Primary photosensitization results when an ingested photodynamic agent in the animal’s body (hypericin from St. John’s Wort (''Hypericum perforatum'') is often quoted) is exposed to ultraviolet light causing fluorescence and death of cells in the skin. The cell necrosis and dermatitis is characteristically most severe in nonpigmented skin. <br><br>

*Secondary (hepatogenous) photosensitization results from the liver’s inability to excrete phylloerythrin, a breakdown product of chlorophyll. In New Zealand facial eczema is caused by ingestion of the hepatotoxin, sporidesmin, produced by the saprophytic fungus ''Pithomyces chartarum''.  

*Secondary (hepatogenous) photosensitization results from the liver’s inability to excrete phylloerythrin, a breakdown product of chlorophyll. In New Zealand facial eczema is caused by ingestion of the hepatotoxin, sporidesmin, produced by the saprophytic fungus ''Pithomyces chartarum''.  

|l2=

|l2= Photosensitisation

|q3=What treatment would you administer?  

|q3=What treatment would you administer?  

|a3=Treatment includes removing the source of photosensitizing agent if identifiable and protecting the animal from direct sunlight by housing. <br><br>

|a3=Treatment includes removing the source of photosensitizing agent if identifiable and protecting the animal from direct sunlight by housing. <br><br>

Topical emollients and antimicrobials may help soften and protect the skin. <br><br>

Topical emollients and antimicrobials may help soften and protect the skin. <br><br>

Systemic antibiotics are indicated in cases of a secondary bacterial dermatitis.  

Systemic antibiotics are indicated in cases of a secondary bacterial dermatitis.  

|l3=

|l3= Photosensitisation

|q4=What control measures would you introduce?  

|q4=What control measures would you introduce?  

|a4= In the absence of recognized plant species, primary photosensitization occurs sporadically and there are no specific control measures.

|a4= In the absence of recognized plant species, primary photosensitization occurs sporadically and there are no specific control measures.

|l4=

|l4= Photosensitisation

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