Microbiology A bird seller developed fever with chills and severe body pain. Investigation confirms the disease as ornithosis. Causative agent is: A Chlamydia psittaci B Burkholderia pseudomallei C Coxiella burnetii D Borrelia 💡 Explanation A bird seller developed fever with chills and severe body pain. Investigation confirms the disease as ornithosis. Causative agent is: ✓ Correct Answer: A. Chlamydia psittaci