Short TTP Linked to Infective Endocarditis Risk

While shorter time to blood culture positivity was linked with infective endocarditis, it was not associated with mortality or sepsis in Streptococcus agalactiae bacteremia.

By
Julie Greenbaum
February 9, 2026
4 min

MDSpire News

Objective:

To investigate the association between time to blood culture positivity (TTP) and the risk of infective endocarditis (IE) in patients with Streptococcus agalactiae bacteremia.

Approach:

Key Findings:

23 cases of infective endocarditis were diagnosed.
30-day mortality rate was 9% (n = 40).
Patients with IE had a significantly lower TTP (7.5 hours) compared to those without IE (9.1 hours).
No significant difference in TTP between patients who survived and those who died within 30 days.

Interpretation:

Shorter TTP may indicate a higher bacterial load and more invasive infection, specifically related to infective endocarditis, but does not correlate with mortality or sepsis.

Limitations:

Retrospective design limits causality inference.
Absence of data on transport and incubation times affects TTP reliability.
Potential selection bias due to differences in patient populations between hospitals with and without incubators.
Lack of data on blood volume collected in culture bottles, affecting TTP assessment.
Sepsis ascertainment limited by the use of only two time intervals.

Conclusion:

Shorter TTP is associated with infective endocarditis in S agalactiae bacteremia but not with mortality or sepsis; the study provides insights despite its limitations.