Abstract
A 24-hour-old Hackney ony 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.
MeSH terms
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Actinobacillus / drug effects
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Actinobacillus / immunology
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Actinobacillus / isolation & purification*
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Actinobacillus Infections / drug therapy
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Actinobacillus Infections / microbiology
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Actinobacillus Infections / veterinary*
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Animals
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Anti-Bacterial Agents
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Antibodies, Bacterial / blood
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Bacteremia / drug therapy
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Bacteremia / microbiology
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Bacteremia / veterinary*
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Diarrhea / microbiology
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Diarrhea / veterinary
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Disease Susceptibility
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Drug Resistance, Microbial
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Drug Therapy, Combination / therapeutic use
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Enzyme-Linked Immunosorbent Assay / veterinary
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Female
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Horse Diseases / drug therapy
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Horse Diseases / microbiology*
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Horses
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Immunoglobulin G / blood
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Male
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Microbial Sensitivity Tests / veterinary
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Neutropenia / microbiology
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Neutropenia / veterinary
Substances
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Anti-Bacterial Agents
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Antibodies, Bacterial
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Immunoglobulin G