Schizophrenia and Bartonella spp. Infection: A Pilot Case-Control Study

Area of Science:

• Neuroscience
• Infectious Diseases
• Psychiatry

Background:

• Emerging zoonotic Bartonella bacteria infections are linked to central nervous system (CNS) symptoms.
• The association between Bartonella species infection and schizophrenia/schizoaffective disorder (SCZ/SAD) remains unclear.

Purpose of the Study:

• To investigate the association between Bartonella species infection and SCZ/SAD.
• To determine if SCZ/SAD symptom severity correlates with documented Bartonella spp. infection.

Main Methods:

• A case-control study design was employed, evaluating 17 SCZ/SAD cases and 13 healthy controls.
• Blood samples were analyzed using serological, microbiological, and molecular techniques, including Bartonella spp. droplet digital PCR (ddPCR).
• Clinical and cognitive assessments were conducted for all participants.

Main Results:

• Bartonella spp. DNA was detected in the blood of 65% of SCZ/SAD cases versus 8% of controls (p=0.0024).
• Serological evidence of Bartonella spp. exposure was common in both groups, with no significant difference (p=0.196).
• No significant difference in SCZ/SAD symptom severity was observed between infected and non-infected cases.

Conclusions:

• This pilot study suggests a potential association between Bartonella spp. infection and SCZ/SAD.
• Preliminary findings support further investigation into the role of Bartonella spp. in the pathogenesis of SCZ/SAD.
• Future research should explore the contribution of Bartonella spp. infection to SCZ/SAD.