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→Pathogenicity
==== Pathogenicity ====
==== Pathogenicity ====
Pathology is rarely seen in adult horses due to the development of immunity, though penetration of the skin by larvae may still cause irritation anddermatitis. Adults with larvae in beneath the skin and in the abdomen can act as carriers. In foals heavy infections can cause severe enteritis and diarrhoea. It should be noted that apparently healthy animals can still have high faecal egg counts.
Pathology is rarely seen in adult horses due to the development of immunity, though penetration of the skin by larvae may still cause irritation anddermatitis. Adults with larvae in beneath the skin and in the abdomen can act as carriers. In foals heavy infections can cause severe enteritis and diarrhoea. It should be noted that apparently healthy animals can still have high faecal egg counts.
Some clinical symptoms that may occur include: acute diarrhoea, loss of weight, coughing, dehydration, slight to moderate anaemia.
==== Control ====
==== Control ====
The number and spread of ''S. westeri'' is best controlled by good hygeine such as the removal of faeces from pasture and stabling and the provision of clean, dry bedding. Foals are often treated with anthelmintics at 2 weeks old against ''S. westeri''.
The number and spread of ''S. westeri'' is best controlled by good hygeine such as the removal of faeces from pasture and stabling and the provision of clean, dry bedding. Foals are often treated with anthelmintics at 2 weeks old against ''S. westeri''.