Scabies Mites Alter the Skin Microbiome and Promote Growth of Opportunistic Pathogens in a Porcine Model
- Pearl M. Swe,
- Martha Zakrzewski,
- Andrew Kelly,
- Lutz Krause,
- Katja Fischer
- Published: May 29, 2014
- DOI: 10.1371/journal.pntd.0002897
The resident skin microbiota plays an important role in restricting pathogenic bacteria, thereby protecting the host. Scabies mites (
Sarcoptes scabiei) are thought to promote bacterial infections by breaching the skin barrier and excreting molecules that inhibit host innate immune responses. Epidemiological studies in humans confirm increased incidence of impetigo, generally caused by
Staphylococcus aureus and
Streptococcus pyogenes, secondary to the epidermal infestation with the parasitic mite. It is therefore possible that mite infestation could alter the healthy skin microbiota making way for the opportunistic pathogens. A longitudinal study to test this hypothesis in humans is near impossible due to ethical reasons. In a porcine model we generated scabies infestations closely resembling the disease manifestation in humans and investigated the scabies associated changes in the skin microbiota over the course of a mite infestation.
...
We report that scabies infestation has an impact on the host's skin microbiota.
Staphylococcus abundance increased with the onset of infection and remained beyond treatment and healing. A shift from commensal to pathogenic
Staphylococci was observed. This study supports the link between scabies and Staphylococcus infections, as seen in humans. It is the first
in vivo demonstration of a mite induced shift in the skin microbiota, providing a basis for a similar study in humans.
http://journals.plos.org/plosntds/article?id=10.1371/journal.pntd.0002897