Extranasal Staphylococcus aureus colonization predisposes to bloodstream infections in patients on hemodialysis with noncuffed internal jugular vein catheters

Association of Staphylococcus aureus Bacterial Load and Colonization Sites With the Risk of Postoperative S. aureus Infection

Background

The independent effects of extranasal-only carriage, carriage at multiple bodily sites, or the bacterial load of colonizing Staphylococcus aureus (SA) on the risk of developing SA surgical site infections and postoperative bloodstream infections (SA SSI/BSIs) are unclear. We aimed to quantify these effects in this large prospective cohort study.

Methods

Surgical patients aged 18 years or older were screened for SA carriage in the nose, throat, or perineum within 30 days before surgery. SA carriers and noncarriers were enrolled in a prospective cohort study in a 2:1 ratio. Weighted multivariable Cox proportional hazard models were used to assess the independent associations between different measures of SA carriage and occurrence of SA SSI/BSI within 90 days after surgery.

Results

We enrolled 5004 patients in the study cohort; 3369 (67.3%) were SA carriers. 100 SA SSI/BSI events occurred during follow-up, and 86 (86%) of these events occurred in SA carriers. The number of colonized bodily sites (adjusted hazard ratio [aHR], 3.5-8.5) and an increasing SA bacterial load in the nose (aHR, 1.8-3.4) were associated with increased SA SSI/BSI risk. However, extranasal-only carriage was not independently associated with SA SSI/BSI (aHR, 1.5; 95% CI, 0.9-2.5).

Conclusions

Nasal SA carriage was associated with an increased risk of SA SSI/BSI and accounted for the majority of SA infections. Higher bacterial load, as well as SA colonization at multiple bodily sites, further increased this risk.

Assessing the Impact of Training on Healthcare Providers' Adherence to Infection Control Measures in Hemodialysis Services

Background and objective Developing and implementing nursing interventions to educate nurses on infection control procedures in hemodialysis units is of utmost importance and offers significant benefits in enhancing the quality of care. This study aimed to assess the impact of training on nursing professionals' practices of hospital infection control measures in hemodialysis services. The research also intended to explore the potential association between these practices and various sociodemographic variables. Materials and methods This was a single-group, pre- and post-interventional study carried out in Haryana State, India. A pretested questionnaire consisting of 29 statements, the responses of which were measured on a 5-point Likert scale, was used as the study tool. Descriptive and statistical tests like paired-t-test were used to analyze the data. Results The practices section of the questionnaire comprised 29 statements, the responses to which were measured on a five-point Likert scale. The scoring ranged from 5 ("strongly agree", i.e., positive practice) to 1 ("strongly disagree", i.e., negative practice). The maximum achievable score was 145 and the minimum achievable score was 9. The pre-test group (i.e., before training intervention) had a mean practice score of 115.0945 [standard deviation (SD)=9.34, standard error of the mean (SE)=0.66]. However, the post-test group (i.e. after training intervention) had a mean score of 135.26 (SD=8.34, SE=0.59). The study found that structured training significantly increased the mean practice score (t=-33.70, p=0.001). In addition, the study also highlighted the significant association of mean practice scores with various demographic variables among the pre-test and post-test groups. The improvement in mean practice scores among the post-test group after the structured training program reveals that such interventions will ultimately lead to a decrease in central line-associated bloodstream infections (CLABSIs) among hemodialysis patients. Conclusions Our findings showed that the educational intervention led to significant improvements in the practices of the participants.

The Effectiveness of Personal Hygiene Practices on Non-Cuffed Central Vein Catheter-Related Infection in Patients Undergoing Hemodialysis: A Randomized Controlled Trial

Infection of the internal jugular vein (IJV) catheter continues to be a common cause of death in patients with end-stage renal disease undergoing hemodialysis (HD). The present study aimed to evaluate the effectiveness of personal hygiene on the incidence of IJV catheter-related bloodstream infection (CRBSI). A randomized, controlled, parallel, and non-inferiority trial was conducted on patients initiated on maintenance HD via right IJV catheter. Patients were randomly allocated to control and intervention group via computer-generated random table. Intervention package for the intervention group included hand washing (2–4 hourly and whenever visibly dirty), feet washing (12 hourly), and axillary shave (at any point during the study, no hair growth in axilla). Patients were provided with a pamphlet and reinforced to continue package till IJV catheter was in situ. Patients were followed up twice a week for one month from the date of catheter insertion for the incidence of CRBSI. The primary outcome of the study was percentage of patients free from CRBSI. On intention-to-treat analysis, the percentage of patients without CRBSI was 53.7% and 29.3% in the intervention and control arm, respectively [P = 0.04; 25.12% (1.43–45.28%)]. Positive blood cultures were higher in control (73.3%) as compared to the intervention group (28.6%) (P = 0.19). Personal hygiene interventions are an effective method to reduce the incidence of CRBSIs among population undergoing maintenance HD via non-cuffed IJV catheter.

Nasal and extra nasal MRSA colonization in hemodialysis patients of north-west of Iran

OBJECTIVES

Methicillin resistant Staphylococcus (S.) aureus colonization is one of the main causes of serious infections in hemodialysis patients. This cross-sectional study was performed to examine prevalence of MRSA colonization and evaluation of risk factors in hemodialysis patients. A total of 560 swab samples from nasal, the skin around catheter and throat were collected from 231 hemodialysis patients in Tabriz. The standard biochemical tests were used for identification of S. aureus isolates. Antimicrobial susceptibility profile was determined against 11 antibiotics by the disk diffusion method. Phenotypic test of S. aureus was performed using novobiocin 30 μg/disc, and methicillin sensitivity test was performed by cefoxitin 30 μg/disc.

RESULTS

Overall, 50.65% (118/231) hemodialysis patients were positive for S. aureus which 34.93% (80/231) of patients were MRSA carriage. The MRSA colonization in patients with a catheter (44.06%) was more than individuals utilizing a fistula (24.57%, p = 0.030). Among sampling sites, the highest MRSA was related to nasal samples (30.70%, p < 0.00001). Extra nasal colonization of S. aureus was observed in 12.71% patients. The highest rates of resistance were observed against ampicillin (93.98%) and the highest sensitivity was against linezolid antibiotic (5.42%). These findings highlight the necessity of prophylaxis against S. aureus in individuals under dialysis.