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Unusual manifestation of salmonellosis in a young foal (case report)
Diarrhea in a foal which is caused by Salmonella typhimurium is not unusual in foals. But this foal developed other clinical signs which are not obviously associated with the diarrhea, e.g. ischemic necrosis of distal limbs. A very interesting although fatal case!

A 5-month-old mixed-breed filly presented with diarrhea due to Salmonella typhimurium infection and subsequently developed pneumonia in addition to ischemic necrosis of distal limbs.

Pulmonary lesions were characterized by numerous discrete, disseminated pyogranulomas with intralesional fungal hyphae.

The morphologic characteristics of fungal hyphae were consistent with Aspergillus spp., and large numbers of A fumigatus were isolated from lung tissue via fungal culture.

Lesions in all 4 limbs were similar in distribution, duration, and severity and were characterized by coagulation necrosis accompanied by occasional thrombi in small vessels without evidence of thrombosis of larger limb arteries.

Thus, limb lesions are consistent with symmetrical peripheral gangrene, a potential complication of sepsis.



Source: M. A. Breshears, T. C. Holbrook, C. E. Haak and P. A. York (2007): Pulmonary Aspergillosis and Ischemic Distal Limb Necrosis Associated with Enteric Salmonellosis in a Foal. In: Vet Pathol 44:215-217 (2007)



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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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