Factors affecting staphylococcal colonization among NIDDM outpatients

Area of Science:

• Microbiology
• Endocrinology
• Public Health

Background:

• Staphylococcus aureus colonization is a risk factor for staphylococcal infections.
• Understanding factors associated with carriage is crucial for infection prevention, especially in vulnerable populations.

Purpose of the Study:

• To investigate factors associated with Staphylococcus aureus carriage in outpatients with non-insulin-dependent diabetes mellitus compared to nondiabetic controls.
• To determine if insulin use, glycemic control, or other demographic factors explain increased carriage rates in diabetic patients.

Main Methods:

• Cross-sectional study comparing Staphylococcus aureus nasal and skin carriage rates in diabetic outpatients and healthy controls.
• Data collected on patient demographics, diabetes management (including insulin use), recent antibiotic treatment, hospitalization history, fasting plasma glucose, and glycosylated hemoglobin levels.

Main Results:

• Diabetic patients exhibited significantly higher Staphylococcus aureus carriage rates (30.5%) compared to controls (11.4%).
• No significant difference in carriage rates was observed between diabetic patients who used insulin and those who did not.
• Staphylococcal colonization was inversely correlated with glycemic control (fasting plasma glucose and glycosylated hemoglobin) in diabetic patients.
• Recent antibiotic treatment, age, race, and duration of diabetes were not significantly correlated with carriage.

Conclusions:

• Diabetic outpatients have an increased rate of Staphylococcus aureus colonization compared to nondiabetic individuals.
• Poor glycemic control is associated with higher Staphylococcus aureus carriage in diabetic patients.
• Insulin injections and common demographic factors do not explain the increased colonization observed in this diabetic population.