Larval cyathostomiasis as a cause of death in two regularly dewormed horses.

The research article investigates the cause of death in two horses that presented with chronic weight loss, diarrhoea and subcutaneous oedema, and it was discovered that they died from Larval cyathostomiasis, despite regular deworming and intensive treatment.

Background

• The research investigates a case involving two horses that exhibited chronic weight loss, subcutaneous oedema (swelling caused by fluid accumulation) and, in one instance, diarrhoea.
• These horses were part of a herd that was regularly dewormed, denoting that they were routinely treated to prevent problems associated with worm infestations.

Medical Assessments

• Medical tests were carried out as part of this investigation. Blood chemistry results showed hypoalbuminaemia (low levels of the protein albumin in the blood), and a low albumin-globulin ratio, an indicator of potential health problems in animals.
• In addition, faecal egg counts – a typical method to assess worm presence – turned out to be negative. No cyathostome larvae, a type of parasitic worm, were found in the horse’s faeces.

Treatment and Postmortem Examination

• Despite receiving intensive medical treatment, both horses couldn’t be saved from their declining health.
• A postmortem examination was conducted to determine the cause of death. The findings revealed severe typhlitis and colitis, inflammation of the cecum and colon respectively, due to the presence of numerous inhibited cyathostome larvae.

Conclusions

• The conclusion of the research is that despite being regularly dewormed, these two horses died from larval cyathostomiasis.
• This finding implies that regular deworming may not necessarily prevent all instances of worm-related disease in horses and that larvae of certain parasites could still cause serious, even fatal, health issues.