Autoimmune Thyroiditis Induced by Bartonella henselae (Cat-Scratch Disease) Might Be Reversible

Area of Science:

• Infectious Diseases
• Endocrinology
• Immunology

Background:

• Bartonella henselae infection is known to cause cat-scratch disease (CSD).
• CSD has been anecdotally linked to triggering autoimmune thyroiditis (AIT).

Observation:

• A 4-year-old boy presented with fever, lymphadenopathy, and headache, initially suspected as lymphoma.
• Diagnosis revealed CSD and AIT, confirmed by positive Bartonella IgG and anti-thyroid antibodies.
• Following treatment and removal of infected tissue, the patient's AIT resolved completely.

Findings:

• This case demonstrates the potential for Bartonella henselae/quintana infection to induce AIT.
• Complete reversibility of AIT was achieved by eliminating the infectious trigger.
• Long-term follow-up confirmed the patient remained disease-free.

Implications:

• Suggests a direct causal link between Bartonella infection and AIT development.
• Highlights the importance of identifying and treating infectious agents in autoimmune conditions.
• Supports early intervention for potentially reversible autoimmune thyroiditis.