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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

Silicate associated osteoporosis (SAO) in an adult horse
The horse was evaluated for a 6-month history of progressive back tenderness and acute onset of lameness. The horse had a marked (4/5) (American Association of Equine Practitioners scale) left forelimb lameness, moderate (2/5) hindlimb ataxia and weakness, and cervical pain upon palpation. Physical examination did not reveal clinical skeletal deformities or respiratory compromise. How can the diagnosis of SAO be made?

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