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Both an acute and chronic form of larval cyathostomosis occur in horses. The acute form occurs due to the re-emergence of hypobiotic thrid stage larvae from the intestinal wall, and horses are usually affected during late winter or early spring.
Both an acute and chronic form of larval cyathostomosis occur in horses. The acute form occurs due to the re-emergence of hypobiotic thrid stage larvae from the intestinal wall, and horses are usually affected during late winter or early spring.
The chronic form occurs when ingested larvae develop to the fourth stage without interruption, leading to inflammation and thickening of the intestinal mucosa. Larval emergence may occur throughout the summer and autumn, leading to the clinical signs associated with a 'wormy' horse.
The chronic form occurs when ingested larvae develop to the fourth stage without interruption, leading to inflammation and thickening of the intestinal mucosa. Larval emergence may occur throughout the summer and autumn, leading to the clinical signs associated with a 'wormy' horse. This type of cyathostomosis is more commonly seen in younger horses who have not developed full immunity.
==Signalment==
==Signalment==
===Clinical Signs===
===Clinical Signs===
* Increased or decreased appetite
* Increased or decreased appetite
Other clinical features of the disease include oedema due to a protein-losing enteropathy. Emergence of larvae from the intestinal wall may lead to haemorrhagic colitis
Other clinical features of the disease include oedema due to a protein-losing enteropathy. Emergence of larvae from the intestinal wall may lead to haemorrhagic colitis
==Diagnosis==
Large numbers of thread-like larvae in faeces The clinical features of cyathostomosis are relatively non-specific so diagnosis may not be straightforward. Faecal egg counts may not be useful as the disease manifests due to the presence of larvae.
==Laboratory tests==
==Laboratory tests==