Triatoma rubrofasciata as a potential vector for bartonellosis

Area of Science:

• Medical Entomology
• Infectious Diseases
• Molecular Biology

Background:

• Bartonella species cause bartonellosis, a disease transmitted by arthropods or animal bites.
• The specific vectors for human bartonellosis are not fully understood, necessitating further research into potential carriers.

Purpose of the Study:

• To investigate the presence and diversity of Bartonella in Triatoma rubrofasciata from China.
• To evaluate the vector competence of T. rubrofasciata for Bartonella transmission to mice.

Main Methods:

• PCR amplification and sequencing of ITS, gltA, and rpoB genes to identify Bartonella in T. rubrofasciata.
• Experiments to assess Bartonella survival, transovarial transmission, and infectivity to mice via insect bites or feces.

Main Results:

• Six Bartonella species were identified in T. rubrofasciata, with B. rochalimae and B. elizabethae persisting for at least eight weeks.
• T. rubrofasciata harbored a greater diversity of Bartonella species compared to rats, ticks, and cat fleas.
• Laboratory transmission experiments confirmed B. elizabethae can infect mice through T. rubrofasciata bites or feces.

Conclusions:

• Triatoma rubrofasciata harbors diverse Bartonella species, including zoonotic ones.
• This study supports the role of T. rubrofasciata as a potential vector for bartonellosis.
• Findings expand knowledge on Bartonella transmission dynamics and the significance of triatomines in disease spread.