A Rare Bacterial Infection in a Person with Type 1 Diabetes: What We're Learning

Doctors reported the first known case of a serious spinal infection caused by an unusual bacterium in a patient with long-standing Type 1 diabetes. The case highlights how diabetes can increase vulnerability to rare infections.

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Key takeaways

Helcococcus kunzii is a bacterium that has been linked to various infections in people with diabetes, and it can cause spondylodiscitis—a serious infection of the spine and discs between vertebrae
This is the first documented case of a spinal infection caused by this particular bacterium, reported in a 62-year-old man with Type 1 diabetes
The infection was successfully treated with a combination of intravenous antibiotics for 10 days followed by 13 weeks of oral antibiotics, with improvement shown on follow-up imaging
Having diabetes mellitus appears to be a risk factor for infections caused by this bacterium, especially when other conditions affect the body's protective barriers

Understanding the Infection

A 62-year-old man with long-standing Type 1 diabetes came to the emergency department with severe lower back pain that made it difficult to move. Imaging tests (MRI) confirmed he had spondylodiscitis—an infection of the spine and the discs between the vertebrae. Blood cultures and samples taken during surgery revealed the cause: a bacterium called Helcococcus kunzii, a germ rarely seen in this type of infection.

What Made This Case Unusual

While Helcococcus kunzii has been identified in other types of infections—including heart valve infections, diabetic foot infections, and infected prosthetic joints—this marks the first reported case of this bacterium causing a spinal infection. The bacterium was found in multiple blood cultures and confirmed in tissue samples collected during surgery using advanced laboratory techniques.

Diabetes as a Risk Factor

Previous research has shown that people with diabetes mellitus are more vulnerable to infections caused by Helcococcus kunzii. This case adds to that evidence, suggesting that having diabetes—particularly long-standing Type 1 diabetes—increases the risk of developing infections from this pathogen, especially in people who also have other conditions that affect the skin barrier or immune function.

How the Infection Was Treated

The patient received intravenous antibiotics (beta-lactams) for 10 days in the hospital, followed by 13 weeks of oral antibiotics taken at home. Follow-up imaging before discharge showed improvement, with no further evidence of the spinal infection. At a 3-month follow-up visit, the patient continued to show clinical improvement.

What This Means Going Forward

This case report alerts doctors to consider Helcococcus kunzii as a possible cause of spinal infections, particularly in patients with diabetes mellitus and other conditions that weaken natural protective barriers. While this is a rare infection, knowing about it helps medical teams recognize and treat it promptly if it occurs.

Evidence label

Source: BMC infectious diseases. Evidence type: PubMed indexed literature. Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.

Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.

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