-- Mary Elizabeth Dallas
THURSDAY, May 30 (HealthDay News) -- Women appear to have a
natural defense against the world's most common sexually
transmitted infection, a new study says.
This natural protective barrier consists mainly of lactic acid
bacteria -- called
The finding appears online May 29 in the journal
Sexually Transmitted Infections.
The discovery could lead to new treatments for "trich," which
affects an estimated 174 million women and men around the world
each year, according to a journal news release.
Trich is caused by the parasite
T. vaginalis. Symptoms of the infection include pain,
irritation and discharge. About 50 percent of all people who have
this condition, however, don't develop symptoms and are unaware
that they are infected.
Researchers Augusto Simoes-Barbosa, of the University of
Auckland in New Zealand, and colleagues examined how easily three
different strains of
T. vaginalisbound to vaginal cells. They repeated the
process when nine different types of
lactobacilliwere also present.
In the vast majority of instances,
lactobacilliprevented the parasite from binding to the
cells. Some types of
lactobacilliwere better at preventing the parasite from
binding to the cells than others, the study authors pointed
"This study reinforces the important role that our microbiomes play in health, infection and disease," they wrote. "Understanding the role that Lactobacillusplays in T. vaginalisinfection/disease might reveal new therapeutic approaches, which include taking advantage of the natural probiotic activity of lactobacilli."
The U.S. Centers for Disease Control and Prevention has more
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