A case of aortitis and saccular aortic aneurysm caused by rare aetiological organisms, <i>Streptococcus constellatus</i> and parvovirus B19, and atherosclerosis

Aortitis and mycotic aneurysm are vascular conditions characterized by inflammation of the aortic wall or the presence of an aneurysm resulting from microbial infection. This is a rare case of aortic aneurysm caused by atherosclerosis, with <i>Streptococcus constellatus</i> and Parvovirus B19 infection, in a 60-year-old male. The patient presented with rigors and pleuritic chest pain, and was found to have a saccular aneurysm of the ascending aorta and pericardial effusion. The patient underwent urgent replacement of the ascending aorta and completed 6 weeks of antibiotics with good recovery. This case emphasizes the importance of considering rare organisms in patients with aortitis and mycotic aneurysm, particularly in cases with blood cultures without microbial growth. Early diagnosis and treatment may be essential for the prevention of life-threatening complications.