Which periodontal pathogen is listed among the direct translocation pathogens to the feto-placental unit?

• A. Porphyromonas gingivalis
• B. Escherichia coli
• C. Streptococcus salivarius
• D. Helicobacter pylori

Answer: (A)

Bacteria in periodontal infections can enter the bloodstream, especially when the gums are inflamed, and some of them can travel to distant sites like the fetal-placental unit. Porphyromonas gingivalis is a key periodontal pathogen known for this direct translocation to the fetus’s environment. Its virulence factors, such as gingipains that break down host defenses and promote tissue invasion, help it reach the placenta and amniotic space, and studies have linked its presence to placental infection and adverse pregnancy outcomes like preterm birth. The other organisms are not typically regarded as periodontal pathogens that directly translocate to the feto-placental unit: Escherichia coli is mainly an enteric bacterium and not a primary periodontal translocator; Streptococcus salivarius is a common harmless oral inhabitant; Helicobacter pylori is a gastric pathogen with systemic associations but not a standard periodontal translocator to the fetus.