Influences on nurses' engagement in antimicrobial stewardship behaviours: a multi-country survey using the Theoretical Domains Framework.

BACKGROUND: Antimicrobial resistance (AMR) is affected significantly by inappropriate antibiotic use, and is one of the greatest threats to human health. Antimicrobial stewardship (AMS) is a programme of actions promoting responsible use of antimicrobials, and is essential for limiting AMR. Nurses have an important role to play in this context. AIM: To investigate the determinants of nurse AMS behaviours and the impact of past training. METHODS: A cross-sectional multi-country survey design with mixed methods was employed. Participants were 262 nurses {223 female; mean age 44.45 [standard deviation (SD) 10.77] years} of 10 nationalities, with individual survey links sent via professional networks in five countries, alongside Twitter. Nine AMS behaviours and 14 behavioural determinants were assessed quantitatively using the Theoretical Domains Framework (TDF), and mapped to the Capability, Opportunity, Motivation - Behaviour (COM-B) model. Analysis identified differences between nurses with and without AMS training. The influence of coronavirus disease 2019 (COVID-19) on AMS behaviour was investigated qualitatively using free-text data. FINDINGS: Nurses performed all nine AMS behaviours, which were significantly higher [t (238) -4.14, P<0.001] among those who had received AMS training [mean 53.15 (SD 7.40)] compared with those who had not received AMS training [mean 48.30 (SD 10.75)]. Nurses who had received AMS training scored significantly higher in all of the TDF domains. The TDF was able to explain 27% of the variance in behaviour, with 'Skills' and 'Behavioural regulation' (e.g. ability to self-monitor and plan) shown to be the most predictive of AMS actions. Both of these domains are situated in the 'Capability' construct of the COM-B model, which can be enhanced with the intervention strategies of education and training. An increase in AMS behaviours was reported since the COVID-19 pandemic, regardless of previous training. Six core themes were linked to AMS: (1) infection prevention and control; (2) antimicrobials and antimicrobial resistance; (3) diagnosis of infection and use of antibiotics; (4) antimicrobial prescribing practice; (5) person-centred care; and (6) interprofessional collaborative practice. CONCLUSION: Nurse training has a significant beneficial effect on AMS behaviour and its determinants. Nurses who had received AMS training scored higher in all TDF determinants of behaviour compared with those who had not received AMS training, resulting in higher capability, opportunity and motivation to perform AMS behaviour. AMS education and training should be offered to nurses to enhance these factors. Future research should consider the optimal level of training to optimize AMS behaviour, with a focus on developing skills and behavioural regulation.

Development of consensus-based international antimicrobial stewardship competencies for undergraduate nurse education.

BACKGROUND: There is growing recognition by national and international policymakers of the contribution nurses make towards antimicrobial stewardship. Although undergraduate education provides an ideal opportunity to prepare nurses for antimicrobial stewardship roles and activities, only two-thirds of undergraduate nursing programmes incorporate any antimicrobial stewardship teaching and only 12% cover all the recommended antimicrobial stewardship principles. Nurses also report that they do not have a good knowledge of antibiotics, and many have not heard of the term antimicrobial stewardship. AIM: To provide international consensus on the antimicrobial stewardship competency descriptors appropriate for undergraduate nurse education. METHODS: A modified Delphi approach comprising two online surveys delivered to an international panel of 15 individuals reflecting expertise in prescribing and medicines management in the education and practice of nurses; and antimicrobial stewardship. Data collection took place between February and March 2019. FINDINGS: A total of 15 participants agreed to become members of the expert panel, of whom 13 (86%) completed round 1 questionnaire, and 13 (100%) completed round 2. Consensus was achieved, with consistently high levels of agreement across panel members, on six overarching competency domains and 63 descriptors, essential for antimicrobial stewardship practice. CONCLUSION: The competency descriptors should be used to direct undergraduate nurse education and the antimicrobial stewardship practices of qualified nurses (including those working in new roles such as Nursing Associates) due to the high levels of agreement reached on competency descriptors.

Implementation of tailored interventions in a statewide programme to reduce central line-associated bloodstream infections.

BACKGROUND: There have been few studies exploring implementation strategies to central line-associated bloodstream infections (CLABSIs) in low- or middle-income countries. AIM: To implement tailored interventions to reduce CLABSI rates in adult intensive care units. METHODS: The implementation strategy of the State Health Department was performed in São Paulo State, Brazil, over two cycles. Cycle 1 (56 hospitals) was exploratory and cycle 2 (77 hospitals) was designed to confirm the hypothesis generated by the first cycle, with three phases each (pre-intervention, intervention, post-intervention). Cycles included: evaluation of healthcare workers' knowledge, observation of practices, and CLABSI rates monthly report. In cycle 1, a log-normal mixed model was used to select variables significantly associated with the reduction of CLABSI. In cycle 2, CLABSI rates were evaluated. FINDINGS: Healthcare workers' practices improved after intervention. In cycle 1, reduction of CLABSI rates was more pronounced in hospitals with initial CLABSI rates >7.4 per 1000 catheter-days (P < 0.001) and those that introduced the use of peripherally inserted central catheters (P = 0.01). For hospitals with high CLABSI initial rates, simulation demonstrated that the rates were expected to decrease by 36% (95% CI: 9-63), no matter the type of intervention. In cycle 2, there was an overall decrease in CLABSI rates during the intervention period; whereas the mean rate fell further post-intervention, rates at the 90th percentile increased. CONCLUSION: The implementation strategy may have had an effect on infection rates independently of the specific interventions implemented; however, the sustainability of reduction in the post-intervention period remains a challenge.

Multi-state survey of healthcare-associated infections in acute care hospitals in Brazil.

BACKGROUND: Healthcare-associated infections (HCAIs) challenge public health in developing countries such as Brazil, which harbour social inequalities and variations in the complexity of healthcare and regional development. AIM: To describe the prevalence of HCAIs in hospitals in a sample of hospitals in Brazil. METHODS: A prevalence survey conducted in 2011-13 enrolled 152 hospitals from the five macro-regions in Brazil. Hospitals were classified as large (≥200 beds), medium (50-199 beds) or small sized (<50 beds). Settings were randomly selected from a governmental database, except for 11 reference university hospitals. All patients with >48 h of admission to the study hospitals at the time of the survey were included. Trained epidemiologist nurses visited each hospital and collected data on HCAIs, subjects' demographics, and invasive procedures. Univariate and multivariate techniques were used for data analysis. FINDINGS: The overall HCAI prevalence was 10.8%. Most frequent infection sites were pneumonia (3.6%) and bloodstream infections (2.8%). Surgical site infections were found in 1.5% of the whole sample, but in 9.8% of subjects who underwent surgical procedures. The overall prevalence was greater for reference (12.6%) and large hospitals (13.5%), whereas medium- and small-sized hospitals presented rates of 7.7% and 5.5%, respectively. Only minor differences were noticed among hospitals from different macro-regions. Patients in intensive care units, using invasive devices or at extremes of age were at greater risk for HCAIs. CONCLUSION: Prevalence rates were high in all geographic regions and hospital sizes. HCAIs must be a priority in the public health agenda of developing countries.

Barriers to investigating and reporting nosocomial outbreaks to health authorities in São Paulo, Brazil: a mixed methods approach.

BACKGROUND: Not all nosocomial outbreaks (NOs) are reported to health authorities (HAs). AIM: To identify barriers to investigating and reporting NOs to HAs. METHODS: A mixed methods approach was performed with a convergent parallel design. The quantitative and qualitative branches of the study were a statewide (electronic) survey and focus groups (FGs), respectively. Infection control practitioners (ICPs) working in the State of São Paulo, Brazil were recruited. FINDINGS: Eighty-five ICPs were enrolled in the survey and 22 ICPs were enrolled in the FGs. Barriers to investigating and reporting NOs included: (i) difficulty in translating outbreak investigation knowledge into practice; (ii) weak planning in outbreak investigation process; (iii) organizational culture and context; (iv) lack of awareness about reporting; and (v) lack of autonomy of ICPs to report outbreaks to HAs. CONCLUSION: HAs could overcome these barriers by revising their strategies to work with healthcare services, as well as delivering translational educational programmes to support improvement in knowledge and skills for NO investigation.

Surveillance Programme for Healthcare Associated Infections in the State of São Paulo, Brazil. Implementation and the first three years' results.

Governmental programmes should be developed to collect and analyse data on healthcare associated infections (HAIs). This study describes the healthcare setting and both the implementation and preliminary results of the Programme for Surveillance of Healthcare Associated Infections in the State of São Paulo (PSHAISP), Brazil, from 2004 to 2006. Characterisation of the healthcare settings was carried out using a national database. The PSHAISP was implemented using components for acute care hospitals (ACH) or long term care facilities (LTCF). The components for surveillance in ACHs were surgical unit, intensive care unit and high risk nursery. The infections included in the surveillance were surgical site infection in clean surgery, pneumonia, urinary tract infection and device-associated bloodstream infections. Regarding the LTCF component, pneumonia, scabies and gastroenteritis in all inpatients were reported. In the first year of the programme there were 457 participating healthcare settings, representing 51.1% of the hospitals registered in the national database. Data obtained in this study are the initial results and have already been used for education in both surveillance and the prevention of HAI. The results of the PSHAISP show that it is feasible to collect data from a large number of hospitals. This will assist the State of São Paulo in assessing the impact of interventions and in resource allocation.

Hospital strain colonization by Staphylococcus epidermidis.

The skin and mucous membranes of healthy subjects are colonized by strains of Staphylococcus epidermidis showing a high diversity of genomic DNA polymorphisms. Prolonged hospitalization and the use of invasive procedures promote changes in the microbiota with subsequent colonization by hospital strains. We report here a patient with prolonged hospitalization due to chronic pancreatitis who was treated with multiple antibiotics, invasive procedures and abdominal surgery. We studied the dynamics of skin colonization by S. epidermidis leading to the development of catheter-related infections and compared the genotypic profile of clinical and microbiota strains by pulsed field gel electrophoresis. During hospitalization, the normal S. epidermidis skin microbiota exhibiting a polymorphic genomic DNA profile was replaced with a hospital-acquired biofilm-producer S. epidermidis strain that subsequently caused repetitive catheter-related infections.

Hospital strain colonization by Staphylococcus epidermidis

The skin and mucous membranes of healthy subjects are colonized by strains of Staphylococcus epidermidis showing a high diversity of genomic DNA polymorphisms. Prolonged hospitalization and the use of invasive procedures promote changes in the microbiota with subsequent colonization by hospital strains. We report here a patient with prolonged hospitalization due to chronic pancreatitis who was treated with multiple antibiotics, invasive procedures and abdominal surgery. We studied the dynamics of skin colonization by S. epidermidis leading to the development of catheter-related infections and compared the genotypic profile of clinical and microbiota strains by pulsed field gel electrophoresis. During hospitalization, the normal S. epidermidis skin microbiota exhibiting a polymorphic genomic DNA profile was replaced with a hospital-acquired biofilm-producer S. epidermidis strain that subsequently caused repetitive catheter-related infections.

Outbreak of surgical infection caused by non-tuberculous mycobacteria in breast implants in Brazil.

SUMMARY: We investigated an outbreak caused by non-tuberculous mycobacteria (NTM) related to breast implant surgery in the city of Campinas, Brazil, by means of a retrospective cohort and molecular epidemiological study. A total of 492 records of individuals having breast surgery in 12 hospitals were evaluated. Twelve isolates were analysed using four different molecular typing methods. There were 14 confirmed cases, 14 possible cases and one probable case. One probable, nine possible and 12 confirmed cases were included in a cohort study; all occurred in eight of the hospitals and the confirmed cases in five. Univariate analysis showed that patients who had had breast reconstruction surgery in hospitals A and B were more likely to have NTM infections. No risk factor was independently associated with NTM infection in the multivariate model. The isolates obtained from patients at each hospital showed different molecular patterns, excluding isolates from hospital C that repeatedly showed the same genotype for approximately one year. In conclusion, this outbreak was caused by polyclonal strains at different institutions, and in one hospital a unique genotype caused most cases. No specific risk factors were found.

Application of four molecular typing methods for analysis of Mycobacterium fortuitum group strains causing post-mammaplasty infections.

A cluster of cases of post-augmentation mammaplasty surgical site infections occurred between 2002 and 2004 in Campinas, in the southern region of Brazil. Rapidly growing mycobacteria were isolated from samples from 12 patients. Eleven isolates were identified as Mycobacterium fortuitum and one as Mycobacterium porcinum by PCR-restriction digestion of the hsp65 gene. These 12 isolates, plus six additional M. fortuitum isolates from non-related patients, were typed by pulsed-field gel electrophoresis (PFGE) and three PCR-based techniques: 16S-23S rRNA internal transcribed spacer (ITS) genotyping; randomly amplified polymorphic DNA (RAPD) PCR; and enterobacterial repetitive intergenic consensus (ERIC) PCR. Four novel M. fortuitum allelic variants were identified by restriction analysis of the ITS fragment. One major cluster, comprising six M. fortuitum isolates, and a second cluster of two isolates, were identified by the four methods. RAPD-PCR and ITS genotyping were less discriminative than ERIC-PCR. ERIC-PCR was comparable to PFGE as a valuable complementary tool for investigation of this type of outbreak.

Nasal MRSA colonization of AIDS Patients cared for in a Brazilian university hospital.

Weekly culture surveillance was conducted over a 2-year period to determine the incidence of methicillin-resistant Staphylococcus aureus nasal colonization among acquired immunodeficiency syndrome patients cared for in a day-care unit and in an infectious diseases unit. Analysis of genomic DNA profiles showed a predominant pattern in both units.

Enterobacter cloacae sepsis outbreak in a newborn unit caused by contaminated total parenteral nutrition solution.

OBJECTIVE: The study aimed to investigate an outbreak caused by Enterobacter cloacae in a neonate intensive care unit. DESIGN: A descriptive study of an outbreak of sepsis in high-risk neonates was used. SETTING: The study was set in a tertiary care university teaching hospital. PATIENTS: The patients were 11 neonates infected with Enterobacter cloacae whose symptoms and signs of sepsis developed during a 16-hour period. All but one neonate received parenteral nutrition. Isolates from blood cultures, in-use parenteral nutrition solutions, and control aliquots of parenteral nutrition solution were typed by pulsed-field gel electrophoresis. RESULTS: Enterobacter cloacae was found in the refrigerated aliquots of parenteral nutrition solution, in blood cultures from infected newborns, and from in-use parenteral nutrition solutions. All these strains of Enterobacter cloacae had the same antibiotic susceptibility pattern and the same genomic DNA profile. The strain isolated from the one patient who did not receive parenteral nutrition presented a different susceptibility profile and genotype. CONCLUSION: The source of the nosocomial sepsis was the parenteral nutrition solution in 10 neonates. This contamination apparently occurred during preparation of the parenteral solution.

[Risk factors associated with the acquisition of multiresistant bacteria in a pediatric nursery] / Fatores de risco relacionados à aquisição de bactérias.

OBJECTIVE: To identify the risk factors in patients who had a multiresistant bacteria during their staying in a Pediatric Intensive Care Unit and in a pediatric nursery of a tertiary teaching hospital.METHODS: Chart review of the patients who stayed in the units from January, 1995 to July, 1997 and had a multiresistant microorganism isolated (both infection and colonization). A case-control study was done using McNemar test for group comparison and using stepwise logistic regression to select independent risk factors. The following risk factors were tested: prior hospital staying, underlying disease, intensive care unit admission, surgical procedure, urinary catheter, central venous line, ventilator, prior antibiotic therapy and skin lesion.RESULTS: Among 52 patients, 66 multiresistant bacteria were identified (among them, 33 were gram-negative bacilli and 33 were methicillin-resistant S. aureus). The logistic regression analysis of the case-control study identified 2 risk factors: prior antibiotic therapy and skin lesion. A single risk factor was indicated for patients with gram-negative bacilli. Nevertheless, for patients with methicillin-resistant S. aureus, central venous lines and skin lesion were significant.CONCLUSION: Prior antibiotic therapy and skin lesion were the factors associated with the acquisition of multiresistant bacteria. Besides skin lesion, for oxacilin-resistant S. aureus colonized patients, central venous catheter use was a risk factor. The strategies employed to limit the spread of those bacteria in the hospital should consider these three factors.

Relative frequency of nosocomial microorganisms at UNICAMP University Hospital from 1987 to 1994.

The frequency of microorganisms identified in nosocomial infections at Unicamp University Hospital from 1987 to 1994 was analysed. The most common microorganism was S. aureus (20.9%), which was found in surgical wound, bloodstream and arterial-venous infections. In urinary tract infections (UTI), gram-negative rods (56.5%) and yeasts (9%) predominated. A. baumannii isolates were observed to have increased in the last three years. There was a gradual increase in the frequency of coagulase-negative staphylococci and A. baumannii in bloodstream infections but there wasn't any change in Candida sp.