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Staphylococci isolated from abscesses in slaughtered animals: characterization and epidemiological studies
Zentralblatt Fur Bakteriologie, Mikrobiologie Und Hygiene. 1. Abt. Originale B, Hygiene
|January 1, 1984
Summary
This study identified numerous staphylococcal species from animal abscesses, with Staphylococcus aureus being the most common. Many strains produced enterotoxins, showing correlations between toxin type, biotype, and phage type.
Area of Science:
- Veterinary Microbiology
- Bacteriology
- Food Safety
Background:
- Staphylococcal infections are common in livestock, causing economic losses.
- Accurate identification and characterization of staphylococcal isolates are crucial for understanding disease transmission and ensuring food safety.
Purpose of the Study:
- To identify and characterize staphylococcal strains isolated from abscesses in slaughtered animals.
- To determine the prevalence of different staphylococcal species and their potential to produce enterotoxins.
Main Methods:
- Isolation and identification of Gram-positive, catalase-positive cocci from animal abscesses.
- Biochemical characterization, including lysostaphin sensitivity, coagulase testing, and anaerobic glucose fermentation.
- Species-level classification using comprehensive phenotypic analysis.
- Biotype and phage typing of Staphylococcus aureus strains.
- Enterotoxin detection using specific assays.
Main Results:
- A total of 71 staphylococcal strains were isolated from 112 animal abscesses.
- Staphylococcus aureus was the most prevalent coagulase-positive species (30 strains), followed by S. intermedius (2 strains).
- Various coagulase-negative staphylococci were identified, including S. hyicus, S. simulans, and S. epidermidis.
- Twenty-five strains (23 S. aureus and 2 unclassified) produced enterotoxins, with types C, D, A, E, A+C, and A+D detected.
- A strong correlation was observed between enterotoxin type, biotype, and phage type.
Conclusions:
- Staphylococci, particularly Staphylococcus aureus, are significant pathogens in slaughtered animals.
- The presence of enterotoxigenic strains highlights potential risks to food safety.
- Further research into the epidemiology and control of these staphylococcal infections in livestock is warranted.