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Involvement of coagulase-negative staphylococci in toxic shock syndrome
Abstract:
Coagulase-negative staphylococci that produce toxic shock syndrome toxin 1 (TSST-1) or a staphylococcal enterotoxin or both were isolated from various sources. Coagulase-negative strains that produce TSST-1 alone or with enterotoxin A were the only staphylococci isolated from seven patients with toxic shock syndrome. Two other toxic shock syndrome patients had coagulase-positive staphylococci also, but only the coagulase-negative strains produced TSST-1. Coagulase-positive and coagulase-negative strains that produced TSST-1 were isolated from two other toxic shock syndrome patients. In addition, coagulase-negative staphylococci that produced toxins were isolated from patients with other staphylococcal infections and from food implicated in a case of food poisoning.
Insights
Coagulase-negative staphylococci producing toxic shock syndrome toxin 1 (TSST-1) or enterotoxins were identified in various infections. These toxin-producing strains, particularly TSST-1 producers, were key in toxic shock syndrome cases.
Area of Science:
- Microbiology
- Infectious Diseases
- Toxicology
Background:
- Staphylococcal toxins, including toxic shock syndrome toxin 1 (TSST-1) and enterotoxins, are significant virulence factors.
- Coagulase-negative staphylococci (CoNS) are increasingly recognized as opportunistic pathogens.
- The role of CoNS in producing specific toxins associated with staphylococcal infections requires further elucidation.
Purpose of the Study:
- To investigate the prevalence and characteristics of toxin-producing coagulase-negative staphylococci (CoNS).
- To determine the association of TSST-1 and enterotoxin-producing CoNS with toxic shock syndrome (TSS) and other staphylococcal infections.
- To identify sources of these toxin-producing bacteria.
Main Methods:
- Bacterial isolation and identification from clinical samples (patients with TSS and other infections) and food sources.
- Detection of toxin production, specifically TSST-1 and staphylococcal enterotoxins (e.g., enterotoxin A).
- Coagulase testing to differentiate between coagulase-positive and coagulase-negative staphylococci.
Main Results:
- Coagulase-negative staphylococci producing TSST-1, enterotoxin A, or both were isolated from various sources.
- TSST-1 producing CoNS were implicated in toxic shock syndrome cases, sometimes exclusively or alongside coagulase-positive strains.
- Toxin-producing CoNS were also found in patients with other staphylococcal infections and in food linked to food poisoning.
Conclusions:
- Coagulase-negative staphylococci are significant producers of key staphylococcal toxins like TSST-1 and enterotoxins.
- These toxin-producing CoNS play a crucial role in the pathogenesis of toxic shock syndrome and other staphylococcal diseases.
- The findings highlight the importance of considering CoNS as potential pathogens in staphylococcal infections and food safety.