Prosthetic valve endocarditis from Granulicatella adiacens (nutritionally variant streptococci)

Area of Science:

• Infectious Diseases
• Cardiology
• Microbiology

Background:

• Nutritionally variant streptococci (NVS) are implicated in endocarditis with higher morbidity and mortality.
• NVS endocarditis, particularly prosthetic valve endocarditis (PVE), poses significant treatment challenges.
• Historically, surgical intervention was often necessary for NVS PVE.

Observation:

• A case of Granulicatella adiacens prosthetic valve endocarditis (PVE) in a patient with congenital heart disease is presented.
• This represents the first reported case of NVS PVE successfully treated medically.
• The patient had underlying congenital heart disease, adding complexity to the clinical picture.

Findings:

• Successful medical treatment of Granulicatella adiacens PVE was achieved using vancomycin, gentamicin, and rifampin.
• This regimen offers a potential alternative to surgery for specific NVS PVE cases.
• A comprehensive literature review on NVS PVE was conducted, alongside discussion of the antibiotic regimen's logistics.

Implications:

• This study suggests that medical management may be a viable option for NVS PVE, challenging historical treatment paradigms.
• The findings provide crucial insights into antibiotic strategies for treating difficult NVS infections.
• Further research into optimizing antibiotic regimens for NVS PVE is warranted, potentially improving patient outcomes and reducing the need for surgery.