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Actinobacillus suis septicaemia in two foals
  1. K. M. Nelson, DVM1,
  2. B. J. Darien, DVM, MS, DipACVIM1,
  3. D. M. Konkle, DVM1 and
  4. F. A. Hartmann, MS2
  1. 1 Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin 53706-1102, USA
  2. 2 Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin 53706-1102, USA

Abstract

A 24-hour-old Hackney pony filly developed signs of weakness, depression and a poor suck reflex, with harsh lung sounds over both fields, and a 48-hour-old Arabian colt from a normal birth which had sucked vigorously developed loose stools and became depressed, weak and anorectic. Both foals had serum IgG concentrations greater than 800 mg/dl, but each had a severe neutropenia with a left shift, and blood cultures from both of them yielded Actinobacillus suis. The A suis isolates had different antimicrobial susceptibility patterns and, in the case of the Arabian, the isolate was resistant to commonly used broad spectrum antimicrobial agents.

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