How often are health care personnel hands colonized with multidrug- resistant organisms? A systematic review and meta-analysis

Impact of a training strategy on improving compliance of hand hygiene and gloving during the placement of a short peripheral venous catheter: the multicentre study CleanHand4

BACKGROUND

Patients who have short peripheral venous catheters (PVC) face an elevated risk of developing bloodstream infections. Preventing catheter-related infections relies on implementing multiple measures, including practicing proper hand hygiene (HH) during catheter placement.

METHODS

We conducted a four-part study: (1) an evaluation of HH practices through direct observation of PVC placements, coupled with the study of the microbial flora of the HCWs fingers just before the placement; (2) the development of an educational tool based on the collected observational and microbiological data; (3) the training to the HCWs observed during the first part, using this tool; and (4) the subsequent observation of the trained HCWs to measure the impact of the training on practice improvement.

RESULTS

Compliant HH was observed in 23.5% of the 647 HCWs observed during PVC placement before training. The microbiological study revealed fewer pathogens on the fingertips of the HCWs practicing compliant HH compared other HCWs (2.6 vs 11,7%; p = 0.003). The comparison of practices before and after training, assessed among 180 HCWs, showed an increase in the proportion of HCWs performing compliant HH (25.0 vs 63.2%; p < 0.001).

CONCLUSIONS

Training HCWs using our educational tool, which combines reminders of best practices and risk factors associated with PVC-related infections, engaging HCWs (presentation of practice evaluation), identifying professionals deviating from best practices (simulation videos), and objectively assessing fingertip contamination (microbiological study), significantly improved compliance with HH gestures and glove usage. We encourage infection control teams to utilize this tool to raise awareness among HCWs responsible for PVC placement about the risk of infection associated inadequate hand hygiene.

Preventing Multidrug-Resistant Bacterial Transmission in the Intensive Care Unit with a Comprehensive Approach: A Policymaking Manual

Patients referred to intensive care units (ICU) commonly contract infections caused by multidrug-resistant (MDR) bacteria, which are typically linked to complications and high mortality. There are numerous independent factors that are associated with the transmission of these pathogens in the ICU. Preventive multilevel measures that target these factors are of great importance in order to break the chain of transmission. In this review, we aim to provide essential guidance for the development of robust prevention strategies, ultimately ensuring the safety and well-being of patients and healthcare workers in the ICU. We discuss the role of ICU personnel in cross-contamination, existing preventative measures, novel technologies, and strategies employed, along with antimicrobial surveillance and stewardship (AMSS) programs, to construct effective and thoroughly described policy recommendations. By adopting a multifaceted approach that combines targeted interventions with broader preventive strategies, healthcare facilities can create a more coherent line of defense against the spread of MDR pathogens. These recommendations are evidence-based, practical, and aligned with the needs and realities of the ICU setting. In conclusion, this comprehensive review offers a blueprint for mitigating the risk of MDR bacterial transmission in the ICU, advocating for an evidence-based, multifaceted approach.

MRSA carriage among healthcare workers in a Vietnamese intensive care unit: a prospective cohort study

Background:

Little is known about the magnitude and patterns of methicillin-resistant Staphylococcus aureus (MRSA) carriage among intensive care unit (ICU) healthcare workers (HCWs), especially in lower-middle-income countries like Vietnam.

Materials and methods:

A prospective cohort study was conducted on HCWs working in the adult ICU of the Hospital for Tropical Diseases in Vietnam between October 28 and December 20, 2019. These HCWs included physicians, nurses, and nursing assistants who were responsible for all essential medical activities and basic patient care. A questionnaire was used to collect participants’ information, including age, sex, profession, ICU working time, and underlying diseases. Hand and nasal swabs were collected weekly for 8 consecutive weeks for MRSA screening. Staphylococcal isolates were checked for catalase and coagulase and, for methicillin resistance using cefoxitin disk diffusion, then rechecked on the matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.

Results:

Among 55 HCWs, 16 (29.1%) carried MRSA in their noses or hands. MRSA intermittent hand carriage was documented in 2 (3.6%) HCWs. Among 53 HCWs undertaking nasal swabs, 13 (24.5%) were MRSA persistent and 3 (5.6%) were intermittent carriers. The MRSA carriage rate was highest among nursing assistants (50%, 4/8). More HCWs with underlying diseases were found to be MRSA carriers (31.8%, 7/22) compared with those without comorbidities (27.3%, 9/33).

Conclusion:

MRSA carriage among HCWs is not rare. The findings highlight an urgent need to review and update the local infection prevention and control measures to prevent MRSA transmission from HCWs to patients.

Unsuspected Clonal Spread of Methicillin-Resistant Staphylococcus aureus Causing Bloodstream Infections in Hospitalized Adults Detected Using Whole Genome Sequencing

BACKGROUND

Though detection of transmission clusters of methicillin-resistant Staphylococcus aureus (MRSA) infections is a priority for infection control personnel in hospitals, the transmission dynamics of MRSA among hospitalized patients with bloodstream infections (BSIs) has not been thoroughly studied. Whole genome sequencing (WGS) of MRSA isolates for surveillance is valuable for detecting outbreaks in hospitals, but the bioinformatic approaches used are diverse and difficult to compare.

METHODS

We combined short-read WGS with genotypic, phenotypic, and epidemiological characteristics of 106 MRSA BSI isolates collected for routine microbiological diagnosis from inpatients in 2 hospitals over 12 months. Clinical data and hospitalization history were abstracted from electronic medical records. We compared 3 genome sequence alignment strategies to assess similarity in cluster ascertainment. We conducted logistic regression to measure the probability of predicting prior hospital overlap between clustered patient isolates by the genetic distance of their isolates.

RESULTS

While the 3 alignment approaches detected similar results, they showed some variation. A gene family-based alignment pipeline was most consistent across MRSA clonal complexes. We identified 9 unique clusters of closely related BSI isolates. Most BSIs were healthcare associated and community onset. Our logistic model showed that with 13 single-nucleotide polymorphisms, the likelihood that any 2 patients in a cluster had overlapped in a hospital was 50%.

CONCLUSIONS

Multiple clusters of closely related MRSA isolates can be identified using WGS among strains cultured from BSI in 2 hospitals. Genomic clustering of these infections suggests that transmission resulted from a mix of community spread and healthcare exposures long before BSI diagnosis.

Evaluation of the Efficiency of Hand Hygiene Technique with Hydroalcoholic Solution by Image Color Summarize

Background and Objectives: The HH (hand hygiene) technique is relatively simple. Even so, in practice there are still non-conformities regarding this aspect. Lack of knowledge or lack of compliance can be reasons for non-adherence with HH techniques. In this context, the purpose of this study was to follow the realization of the hand-washing technique with hydroalcoholic solution, applied before and after receiving the HH recommendations. Materials and Methods: A descriptive, cross-sectional study was conducted from May 2022 to June 2022. Students from a second year dental medicine class teaching in French 2021/22 “Grigore T. Popa” University of Medicine and Pharmacy in Iasi were included in the study. The approval of the ethics commission was received: No. 184/05.05.2022. The study was conducted in two stages. In the first stage, HH was performed without any recommendation. In the second stage, the antiseptic hand rubbing technique was presented following the WHO recommendations. The fluorescent Fluo-Add solution, Wood lamp for dermatology (4 × 5.5 W ultraviolet tubes with a wavelength of 360 nm), and photo camera were used. Subjects performed their HH movement before and after receiving instructions according to WHO. Images were initially taken from the backhand and palm and were finally analyzed with Image Color Summarizer. The data were analyzed by the Mann–Whitney U Test, t-test paired samples using IBM-SPSS version 26 (IBM, Armonk, NY, USA), and p ≤ 0.05 was considered statistically significant. Results: After analyzing the images, there were 70 subjects, 45.7% (32) female and 54.33% (38) male. Final average covered area of backhand was 60.89% (±17.17), 28.84:86.11, compared to 52.07% (±17.04), 9:85.23. Final average covered area for palm was 69.91% (±13.5), 31.61:93.41 compared to 59.74% (±16.64), 26.13:92.72. No statistical significance was obtained by gender. Conclusions: The study showed an improvement in hand hygiene technique without highlighting gender differences.

Preventing healthcare-related infections among older adults: a focus on cross-transmission of antibiotic-resistant bacteria

INTRODUCTION

Older individuals (i.e. age ≥65 years) are at increased risk for development of infections including those due to antimicrobial-resistant bacteria, and transmission may occur between institutional and community settings.

AREAS COVERED

This article reviews infections in older individuals with a specific focus on healthcare-related and antimicrobial resistant infections. A structured narrative review was performed to identify articles published in English since 2010. Themes included defining the scope of the problem, establishing characteristics of older individuals that impact the burden of resistant infections, and interventions aimed at minimizing their impact.

EXPERT OPINION

Older individuals suffer a high burden of illness related to antimicrobial resistant infections. Individuals with chronic illnesses, frailty, and residents of nursing homes are at highest risk. Clinical trials have shown that antimicrobial stewardship interventions may reduce antibiotic use in nursing homes without compromising safety. Antimicrobial resistant bacteria are prevalent among nursing home residents, and bundled infection prevention and control interventions can reduce their transmission. Transmission of antimicrobial resistant bacteria occurs among older adults across hospital and institutional settings, which may further spread to the community. The burden of infections in older adults is expected to increase in the coming years and represents a healthcare and research priority.

Containment of a carbapenem-resistant Acinetobacter baumannii complex outbreak in a COVID-19 intensive care unit

Background

A carbapenem-resistant Acinetobacter baumannii outbreak in the COVID intensive care unit of a community hospital was contained using multidrug resistant organism guidelines. The purpose of this study is to report on an outbreak investigation and containment strategy that was used, and to discuss prevention strategy.

Methods

A multidisciplinary approach contained the spread of infection. Strategies implemented included consultation with experts, screening, and reversal of personal protective equipment conservation. Ensuring infection control best practices are maintained remain important efforts to reduce the spread of multidrug resistant organisms.

Results

Five patients with carbapenem-resistant Acinetobacter baumannii were identified from routine clinical cultures within one week and one patient was identified from active surveillance cultures.

Discussion

Personal protective equipment conservation, strategies to prevent health care personnel exposure, and patient surge staffing protocols may have increased the likelihood of multidrug resistant organism transmission. Environmental and behavioral infection control regulations with effective administrative guidance, active surveillance cultures, and antimicrobial stewardship are critical to prevent future outbreaks.

Conclusions

After outbreak containment strategies were implemented, no additional patients were identified with carbapenem-resistant Acinetobacter baumannii. Conventional infection prevention and control strategies were re-instituted. A multidisciplinary approach with continued focus on hand hygiene, environmental cleaning, and correct use of personal protective equipment needs to be put in place to successfully contain and prevent the spread of carbapenem resistant infections.

Infection prevention requirements for the medical care of immunosuppressed patients: recommendations of the Commission for Hospital Hygiene and Infection Prevention (KRINKO) at the Robert Koch Institute

In Germany, guidelines for hygiene in hospitals are given in form of recommendations by the Commission for Hospital Hygiene and Infection Prevention (Kommission für Krankenhaushygiene und Infektionsprävention, "KRINKO"). The KRINKO and its voluntary work are legitimized by the mandate according to § 23 of the Infection Protection Act (Infektionsschutzgesetz, "IfSG"). The original German version of this document was published in February 2021 and has now been made available to the international professional public in English. The guideline provides recommendations on infection prevention and control for immunocompromised individuals in health care facilities. This recommendation addresses not only measures related to direct medical care of immunocompromised patients, but also management aspects such as surveillance, screening, antibiotic stewardship, and technical/structural aspects such as patient rooms, air quality, and special measures during renovations.

Comparison of hand hygiene compliance self-assessment and microbiological hand contamination among healthcare workers in Mwanza region, Tanzania

Background

Compliance with hand hygiene (HH) practices remains a major challenge in preventing healthcare-associated infections (HCAI). Little is known whether self-reported HH compliance reflects the level of hand contamination microbiologically as a guide for specific infection prevention and control (IPC) measures.

Methods

A cross-sectional study was conducted between July and September 2019 involving 18 healthcare facilities (HCF) in Mwanza region, Tanzania. It assessed HH using astructured questionnaire and microbiological analysis of hand samples for culture (n=212), and the WHO Hand Hygiene Self-Assessment Framework (2010) (n=74).

Results

The overall median HH score (interquartile range) was 212.5 (190–245) and designated at basic level in the WHO framework. The scores progressively increased from basic level in health centres to intermediate level in a tertiary hospital. Self-reported HH compliance using the WHO recommended cut-off value of ≥81.0% was 10.8% (8/74). A total of 56 (26.4%) healthcare workers (HCWs) hands had bacterial contamination; 17.9% (n=38) by Gram negative bacteria (including coliforms, Acinetobacter spp and Pseudomonas aeruginosa), 8.0% (n=17) by meticillin-resistant Staphylococcus aureus (MRSA) and 0.5% (n=1) by both. Hand contamination was significantly higher in district hospitals (P-value=0.0437), and among HCWs residing in the rural areas (P-value=0.017).

Conclusion

The median HH score amongst HCF in Mwanza region was at basic level. A quarter of HCWs hands were contaminated by bacteria which mismatched self-reported HH. A need to incorporate HH microbiological paramaters to the WHO HH assessment tool is needed, and future IPC interventional measures should be tailored to the HCF tier and in rural areas.

Vancomycin-Resistant Enterococci: Epidemiology, Infection Prevention, and Control

Vancomycin-resistant enterococcus (VRE) is a pathogen of growing concern due to increasing development of antibiotic resistance, increasing length of hospitalizations and excess mortality. The utility of some infection control practices are debatable, as newer developments in infection prevention strategies continued to be discovered. This article summarizes the significance of VRE and VRE transmission, along with highlighting key changes in infection control practices within the past 5 years.

Microbiological Contamination of the Office Environment in Dental and Medical Practice

The microbiological contamination of the environment in independent healthcare facilities such as dental and general practitioner offices was poorly studied. The aims of this study were to describe qualitatively and quantitatively the bacterial and fungal contamination in these healthcare facilities and to analyze the antibiotic resistance of bacterial pathogens identified. Microbiological samples were taken from the surfaces of waiting, consulting, and sterilization rooms and from the air of waiting room of ten dental and general practitioner offices. Six surface samples were collected in each sampled room using agar contact plates and swabs. Indoor air samples were collected in waiting rooms using a single-stage impactor. Bacteria and fungi were cultured, then counted and identified. Antibiograms were performed to test the antibiotic susceptibility of bacterial pathogens. On the surfaces, median concentrations of bacteria and fungi were 126 (range: 0–1280) and 26 (range: 0–188) CFU/100 cm², respectively. In indoor air, those concentrations were 403 (range: 118–732) and 327 (range: 32–806) CFU/m³, respectively. The main micro-organisms identified were Gram-positive cocci and filamentous fungi, including six ubiquitous genera: Micrococcus, Staphylococcus, Cladosporium, Penicillium, Aspergillus, and Alternaria. Some antibiotic-resistant bacteria were identified in general practitioner offices (penicillin- and erythromycin-resistant Staphylococcus aureus), but none in dental offices. The dental and general practitioner offices present a poor microbiological contamination with rare pathogenic micro-organisms.

Hand Hygiene Evaluation Using Two Different Evaluation Tools and Hand Contamination of Veterinary Healthcare Workers in a Swiss Companion Animal Clinic

Hand hygiene (HH) is the most important measure to prevent nosocomial infections. HH compliance in companion animal clinics has been reported to be poor. The present study compared an online application with the WHO evaluation form to assess the WHO five moments of HH in a Swiss companion animal clinic. In 202 hand swabs from 87 staff members, total viable count (TVC) before and after patient contact was evaluated and the swabs were tested for selected antimicrobial resistant microorganisms of public health importance. HH compliance (95% confidence interval) was 36.6% (33.8–39.5%) and was similar when assessed with the two evaluation tools. HH differed between hospital areas (p = 0.0035) and HH indications (p < 0.0001). Gloves were worn in 22.0% (18.0–26.6%) of HH observations and were indicated in 37.2% (27.3–48.3%) of these observations. Mean TVC before patient contact was lower (0.52 log CFU/cm²) than after patient contact (1.02 log CFU/cm²) but was similar before patient contact on gloved and ungloved hands. Three hand swabs (1.5% (0.4–4.3%)) were positive for methicillin-resistant Staphylococcus aureus. Gloving should not be regarded as a substitute for HH. Overall, HH in companion animal medicine should urgently be fostered.

Hand Hygiene, an Update

Hand hygiene by health care personnel is an important measure for preventing health care-associated infections, but adherence rates and technique remain suboptimal. Alcohol-based hand rubs are the preferred method of hand hygiene in most clinical scenarios, are more effective and better tolerated than handwashing, and their use has facilitated improved adherence rates. Obtaining accurate estimates of hand hygiene adherence rates using direct observations of personnel is challenging. Combining automated hand hygiene monitoring systems with direct observations is a promising strategy, and is likely to yield the best estimates of adherence. Greater attention to hand hygiene technique is needed.

Influence of intraoperative closed glove exchange on glove contamination during clean soft tissue surgeries

OBJECTIVES

To determine the influence of intraoperative glove exchange on glove contamination during clean soft tissue surgery.

STUDY DESIGN

Prospective clinical study.

SAMPLE POPULATION

Two hundred pairs of gloves and gowns from 50 clean soft tissue surgeries.

METHODS

Gloves and gown cuffs were cultured from the primary surgeon and first assistant using a standardized protocol. Cultures were taken from outer surface of both gown cuffs prior to surgery and after gloves were removed at the end of surgery; gloves were cultured prior to surgery, at end of surgery and after a new pair was donned after closed glove exchange. Cultures were evaluated for colony-forming units after 72 h of inoculation.

RESULTS

Bacterial contamination was documented in 41 of the 50 surgeries (82%). The most common species cultured was Streptocococcus spp. There was no difference (p = .719) in the bacterial contamination rate of gown cuffs prior to surgery (10%; 20/200) compared to after surgery (9.5%; 19/200). The bacterial contamination rate for gloves was 10.5% (21/200) prior to surgery, 19.5% (39/196) after surgery, and 11% (22/200) after regloving. Gloves cultured following surgery were significantly more contaminated than gloves cultured preoperatively (p = .010) or gloves cultured following regloving (p = .018).

CONCLUSION

Glove exchange did not increase bacterial contamination of gloves during the clean soft tissue surgeries tested here.

CLINICAL SIGNIFICANCE

The outside of the gown cuff does not seem to represent a major source of contamination during clean procedures. This study does not provide evidence to support a change in current practices for intraoperative closed glove exchange.

Enterococcal contamination of hospital environments in KwaZulu-Natal, South Africa

AIMS

Enterococci are implicated in hospital-acquired infections and show high tenacity on inanimate objects in the hospital environment. This study investigated the prevalence of Enterococcus spp. in selected wards in public hospitals at four levels of healthcare from a district in KwaZulu-Natal, South Africa.

METHODS AND RESULTS

Swabs were collected from frequently touched areas in the paediatric wards and intensive care units (ICUs). Presumptive Enterococcus spp. were isolated and confirmed to genus and species levels, followed by Kirby-Bauer disk diffusion against 14 antibiotics. The results showed that enterococci were recovered from all 11 surfaces tested with the highest contamination rate observed on occupied beds and mops used to clean floors. A total number of 295 Enterococcus was identified. Polymerase chain reaction identified Enterococcus faecalis 83.1% (245/295) and Enterococcus faecium 12.9% (38/295), while whole genome sequencing identified Enterococcus gallinarum 2.0% (6/295) and Enterococcus casseliflavus 2.0% (6/295). Significant prevalence was observed in paediatric wards 64.1% (189/295) compared with the ICUs 35.9% (106/295), p < 0.05, in central, regional and district hospitals. Collectively, 82.0% (242/295) of enterococcal isolates were multidrug resistant, and 80 different antibiograms were observed. The most prominent antibiogram for E. faecium was CIP-RIF-NIT-TET-ERY and for E. faecalis CIP-TET-ERY.

CONCLUSION

E. faecalis was the most frequent enterococcal species isolated in all the hospitals investigated and correlates with studies conducted elsewhere. A substantially greater number of isolates were recovered from the paediatric wards compared with ICUs, and thus improved standards should be developed for infection control practices. It is suggested that the elevated use of antibiotics contributed to the increased nonsusceptible isolates observed from ICUs. This study highlighted the high recovery rate of enterococci in the hospital environment even in a nonoutbreak setting.

SIGNIFICANCE AND IMPACT OF THE STUDY

Enterocci had a high prevalence rate on the surfaces within the hospitals studied. This study gives an insight into the possible roles all healthcare staff may play in infection control intervention, including proper handling of hospital cleaning equipment and lack of knowledge about the potential for bacteria dissemination.

Prevalence, Characteristics, and Epidemiology of Microbial Hand Contamination Among Minnesota State Fair Attendees (2014)

Background: Many antimicrobial-resistant infections are community-acquired, yet community carriage of microorganisms by healthy individuals is poorly characterized. We assessed microorganism carriage on the hands of Minnesota State Fair attendees and explored associated factors.

Methods: Minnesota State Fair attendees (in 2014) from households with ≥2 members (≥1 member being <19 years old [a child]) were eligible to participate. Participants provided biological samples via a hand plating technique and completed a questionnaire on factors potentially related to microorganism carriage. Using presumptive taxonomic identifications and disk-diffusion-determined resistance phenotypes, hand-culture isolates were classified by microbial type; types were grouped into four broad categories based on inferred pathogenicity and consistency with the skin microbiota. Descriptive statistics, X² tests, and generalized linear mixed-effects models were used to explore associations between survey and culture data.

Results: We enrolled 206 participants from 82 households during 2 days; 50% of subjects were children. Overall, 99.5% (205/206) of hand samples yielded microorganisms. Most were non-pathogenic, whether skin microbiota (98.5% of participants) or non-skin microbiota (93.2% of participants). Only 2.4% (5/206) of samples yielded antibiotic-resistant bacteria. Children were more likely than adults to carry potentially pathogenic (OR = 3.63, 95% CI: 1.66–7.93) and presumably non-pathogenic (OR = 6.61, 95% CI: 1.67–26.15) non-skin microorganisms.

Conclusions: Large community gatherings can serve as efficient sites for estimating the prevalence of microorganism carriage. A small proportion of participants carried antimicrobial-resistant pathogens on their hands; most carried non-pathogenic microorganisms, and no exposures specific to the state fair were associated with microorganism carriage.

Prevalence, risk-factors, and antimicrobial susceptibility profile of methicillin-resistant Staphylococcus aureus (MRSA) obtained from nares of patients and staff of Sokoto state-owned hospitals in Nigeria

Aim: The aim of the study was to determine the prevalence of methicillin-resistant Staphylococcus aureus (MRSA) obtained from the nasal cavity of participants and investigate the antibiotic resistance profiles of the isolates from Sokoto state, Nigeria.

Methods: Nasal swabs of both nares were obtained from 378 participants across three study centers within the six-month study period. The Staphylococcus aureus isolates recovered were characterized, and their resistance phenotype determined in conjunction with MRSA prevalence.

Results: Phenotypic screening of isolates obtained in this study revealed a total of 131 (17.3%) coagulase-positive Staphylococci out of 756 samples. Of this number, there were 81 (61.8%) S. aureus, 36 (27.5%) Staphylococcus intermedius, 6 (4.5%) Staphylococcus hyicus, and 8 (6.1%) Staphylococcus schleiferi.

Conclusion: This study found a prevalence of 61.8% and 46.9% of S. aureus and MRSA among the studied hospitals in Sokoto state, thus demonstrating that the nares of the hospital populace are not free from S. aureus and MRSA colonization.

Multidrug-resistant bacteria in ICU: fact or myth

PURPOSE OF REVIEW

Antimicrobial resistance (AMR) is increasing in ICUs around the world, but the prevalence is variable. We will review recent literature and try to answer the question whether this is a myth or a new reality, as well as discuss challenges and potential solutions.

RECENT FINDINGS

AMR is diverse, and currently Gram-negative multidrug-resistant organisms (MDROs) are the main challenge in ICUs worldwide. Geographical variation in prevalence of MDROs is substantial, and local epidemiology should be considered to assess the current threat of AMR. ICU patients are at a high risk of infection with MDRO because often multiple risk factors are present. Solutions should focus on reducing the risk of cross-transmission in the ICU through strict infection prevention and control practices and reducing exposure to antimicrobials as the major contributor to the development of AMR.

SUMMARY

AMR is a reality in most ICUs around the world, but the extent of the problem is clearly highly variable. Infection prevention and control as well as appropriate antimicrobial use are the cornerstones to turn the tide.

Occupational Infection Risk with Multidrug-Resistant Organisms in Health Personnel-A Systematic Review

The increase in multi-drug-resistant organisms (MDROs) in the last years has become a public health problem. MDROs are partially responsible for numerous nosocomial infections, extended hospital stays, high costs, and high mortality. In addition to methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant enterococci (VRE), Gram-negative bacteria are also a key area of focus. The knowledge of MDROs among the medical staff in the occupational context is limited, with the exception of MRSA. Therefore, a systematic review was carried out to determine the occupational risk for employees posed by MDROs. The search included studies from the year 2000 onwards among personnel who had contact with MDROs. A total of 22 primarily cross-sectional studies in hospital or geriatric care settings were found, with large differences regarding number of participants, examination method, inclusion of a control group, and study quality. The most frequently examined pathogens were extended-spectrum ß-lactamase (ESBL)-producing bacteria with a prevalence of 2.6-48.5%, VRE (0-9.6%), and MRSA (0.9-14.5%). There are only few qualitatively good studies available on MDROs' risk infection for employees in the health service. Any comparison of the results was limited by data heterogeneity. More research is required to describe the occupational risk of infection with MDROs.