Comparison of the enterotoxigenic types, toxic shock syndrome toxin I (TSST-1) strains and antibiotic susceptibilities for enterotoxigenicStaphylococcus aureusstrains isolated from food and clinical samples

Staphylococcus aureus (S. aureus) is the most common pathogen in humans that causes various infections. A variety of infections due to S. aureus are related to virulence factors, one of which is Toxic Shock Syndrome Toxin-1 (TSST-1) as the main cause of Toxic Shock Syndrome (TSS). This study aimed to explore the genetic pattern of the tsst-1 genes among MSSA and MRSA from clinical isolates of patients at Dr. Soetomo General Academic Hospital, Surabaya-Indonesia. This study performed a PCR test on 106 clinical samples of S. aureus isolated to determine the presence of the tsst-1 genes; subsequently, this study also performed phylogenetic analysis. The positive tsst-1 genes were found in 3 (5.7%) MSSA isolates and 2 (3.8%) MRSA isolates from 106 samples that were divided into 53 MSSA isolated and 53 MRSA isolates. There was no significant difference between the tsst-1 genes on both the MSSA and MRSA bacteria (p = 0.648). The positive tsst-1 genes were found in 1 (4.5%) of pus specimens and 2 (16.7%) of blood specimens from MSSA isolates. However, the positive tsst-1 genes were found in neither sputum nor urine specimens. The genes were found in 2 (16.7%) of blood specimens from MRSA isolates. Based on the phylogenetic tree, Indonesian tsst-1 isolated belonged to the same clade as Japan, Iran, Iraq, India, Egypt, and the United Kingdom. The prevalence of tsst-1 genes of both MSSA and MRSA from clinical isolates in Dr. Soetomo General Academic Hospital Surabaya was 5.7% and 3.8%, respectively. The tsst-1 genes of Surabaya-Indonesia, Japan, Iran, Iraq, India, Egypt, and the United Kingdom belonged to the same clade.

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Influence of the Vaginal Microbiota on Toxic Shock Syndrome Toxin 1 Production by Staphylococcus aureus

Applied and Environmental Microbiology ◽

10.1128/aem.02908-12 ◽

2013 ◽

Vol 79 (6) ◽

pp. 1835-1842 ◽

Cited By ~ 20

Author(s):

Roderick A. MacPhee ◽

Wayne L. Miller ◽

Gregory B. Gloor ◽

John K. McCormick ◽

Jo-Anne Hammond ◽

...

Keyword(s):

Staphylococcus Aureus ◽

Toxic Shock Syndrome ◽

Pathogenic Bacteria ◽

Toxin Production ◽

Clinical Samples ◽

Toxic Shock ◽

Aerobic Vaginitis ◽

Content Type ◽

Toxic Shock Syndrome Toxin

ABSTRACTMenstrual toxic shock syndrome (TSS) is a serious illness that afflicts women of premenopausal age worldwide and arises from vaginal infection byStaphylococcus aureusand concurrent production of toxic shock syndrome toxin-1 (TSST-1). Studies have illustrated the capacity of lactobacilli to reduceS. aureusvirulence, including the capacity to suppress TSST-1. We hypothesized that an aberrant microbiota characteristic of pathogenic bacteria would induce the increased production of TSST-1 and that this might represent a risk factor for the development of TSS. AS. aureusTSST-1 reporter strain was grown in the presence of vaginal swab contents collected from women with a clinically healthy vaginal status, women with an intermediate status, and those diagnosed with bacterial vaginosis (BV). Bacterial supernatant challenge assays were also performed to test the effects of aerobic vaginitis (AV)-associated pathogens toward TSST-1 production. While clinical samples from healthy and BV women suppressed toxin production,in vitrostudies demonstrated thatStreptococcus agalactiaeandEnterococcusspp. significantly induced TSST-1 production, while someLactobacillusspp. suppressed it. The findings suggest that women colonized byS. aureusand with AV, but not BV, may be more susceptible to menstrual TSS and would most benefit from prophylactic treatment.

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