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Proliferative enteropathy due to Lawsonia intracellularis in a filly
Not unusual in pigs: profuse diarrhea caused by the obligate intracellular bacterium Lawsonia intracellularis. The `Proliferative enteropathy` (PE) is a disease of high economic impact in swine worldwide. In most other species the disease occurs as a sporadic infection. It has never been described in horses before. This case comes from Switzerland.

Lawsonia intracellularis Proliferative Enteropathy in a Filly
This paper reports a PE caused by L. intracellularis in a 9-month-old Pura Raza Española filly with a history of profuse diarrhoea.

The horse was treated with antibiotics and additionally symptomatic with i.v. infusions etc. but was finally euthanized.

Pathological lesions consisted of a severe proliferative enteritis associated with argyrophilic bacteria in the apical cytoplasm of proliferating crypt epithelium.

Characteristic PCR products confirmed the presumptive diagnosis of L. intracellularis infection.



Source: Wuersch, K., Huessy, D., Koch, C. & Oevermann, A. (2006): Lawsonia intracellularis Proliferative Enteropathy in a Filly. In: Journal of Veterinary Medicine Series A 53 (1), 17-21.




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EQUINE

CT diagnosis of fatigue fracture of Mt 3 in young adult horsesmembers
Two young adult endurance horses were presented for investigation of sudden-onset forelimb lameness during competition. Clinical examination revealed a severe forelimb lameness and pain on palpation of the proximal palmar metacarpal area. Initial radiographic survey of the affected forelimb was unremarkable in both cases. A week of box rest resulted in only a mild improvement in the lameness. A second radiographic examination did not reveal any significant abnormalities. The history is very suspicious for a fracture, especially a fatigue fracture. How was it diagnosed and treated finally?

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