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Characterization of Micrococcaceae isolated from post mortem examined pigs
Nordisk Veterinaermedicin
|June 1, 1978
Summary
Micrococcaceae infections are common in preweaned pigs, often linked to Staphylococcus aureus and Staphylococcus epidermidis. These bacteria cause various pathological lesions, impacting piglet health and survival.
Area of Science:
- Veterinary Microbiology
- Animal Pathology
- Swine Health
Background:
- Micrococcaceae infections represent a significant concern in preweaning piglet mortality.
- Previous studies have indicated the presence of various staphylococcal species in swine pathology.
Purpose of the Study:
- To investigate the incidence and types of Micrococcaceae infections in preweaning pigs.
- To characterize the isolated staphylococcal strains biochemically and identify their etiological roles in piglet diseases.
Main Methods:
- Post-mortem examination of 170 preweaning pigs that died from infections.
- Isolation and biochemical characterization of 248 Micrococcaceae strains.
- Differentiation of strains into Staphylococcus aureus, Staphylococcus epidermidis, and Micrococcus species.
Main Results:
- An incidence of 3.1 per mille live-born pigs was recorded for Micrococcaceae infections, predominantly in piglets under 4 weeks.
- Staphylococcus aureus (41.5%) and Staphylococcus epidermidis (34.5%) were the most prevalent isolates.
- Identified S. aureus and S. hyicus (S. epidermidis biotype 2) in specific pathological lesions, with 19 fermentation patterns observed.
Conclusions:
- Various staphylococci are frequently isolated from pathological lesions in preweaning pigs.
- Biochemical characterization revealed complexities, with some strains not fitting established classification systems.
- Further research is needed to fully understand the pathogenicity and classification of these swine-associated staphylococci.