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BACKGROUND: Antibiotic consumption is a driver for the increase of antimicrobial resistance. The objective of this study is to analyze variations in antibiotic consumption and its appropriate use in Brazil from 2014 to 2019. METHODS: We conducted a time series study using the surveillance information system database (SNGPC) from the Brazilian Health Regulatory Agency. Antimicrobials sold in retail pharmacies were evaluated. All antimicrobials recorded for systemic use identified by the active ingredient were eligible. Compounded products and formulations for topic use (dermatological, gynecological, and eye/ear treatments) were excluded. The number of defined daily doses (DDDs)/1,000 inhabitants/day for each antibiotic was attributed. The number of DDDs per 1,000 inhabitants per day (DDIs) was used as a proxy for consumption. Results were stratified by regions and the average annual percentage change in the whole period studied was estimated. We used the WHO Access, Watch, and Reserve (AWaRe) framework to categorize antimicrobial drugs. RESULTS: An overall increase of 30% in consumption from 2014 to 2019 was observed in all Brazilian regions. Amoxicillin, azithromycin and cephalexin were the antimicrobials more consumed, with the Southeast region responsible for more than 50% of the antibiotic utilization. Among all antimicrobials analyzed 45.0% were classified as watch group in all Brazilian regions. CONCLUSION: We observed a significant increase in antibiotics consumption from 2014 to 2019 in Brazil restricted to the Northeast and Central West regions. Almost half of the antibiotics consumed in Brazil were classified as watch group, highlighting the importance to promote rational use in this country.

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BACKGROUND: Antimicrobial resistance is a global health problem, due to morbidity, mortality, and healthcare costs. The misuse of antimicrobials is the main cause of antimicrobial resistance. The aim of this study was to report antimicrobial resistance and antibiotic consumption in a secondary care hospital in Mexico. METHODS: Within a cross-sectional study, antimicrobial resistance data on ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) and antibiotic consumption from 2020 to 2022 were collected. Antimicrobial resistance was reported based on percentages of resistance and consumption was analyzed using the defined daily dose (DDD)/100 bed days and the AWaRe (Access, Surveillance, Reservation) antibiotic group. RESULTS: Antibiotic consumption in 2020, 2021 and 2022 was 330, 175 and 175 DDD/100 beds day, respectively. The rate of ceftriaxone resistance in E. coli (n = 526) and K. pneumoniae (n = 80) was 76% and 69%, respectively, the rate of carbapenem resistance in A. baumannii (n = 168) and P. aeruginosa (n = 108) was 92% and 52%, respectively; the rate of oxacillin resistance in S. aureus (n = 208) was 27%; and the rate of vancomycin resistance in E. faecium (n = 68) was 47%. CONCLUSION: The reported results are congruent with global estimates of antibiotic resistance and consumption, providing an overview that could generate actions for antimicrobial optimization at the local and regional levels.

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BACKGROUND AND OBJECTIVE:  The increasing emergence and spread of drug-resistant pathogens resulting from inappropriate antibiotic usage have become more evident in recent years, particularly with the rising incidence of methicillin-resistant Staphylococcus aureus (MRSA) infections. Since joining the Organization for Economic Cooperation and Development (OECD), Costa Rica can now compare its healthcare system with other countries, and similarities have been noted with Italy regarding health indicators. Both nations have universal healthcare systems, covering their entire populations, and hold similar positions in the Human Development Index (HDI). Consequently, the goal is to compare antibiotic prescribing and consumption patterns to collaboratively develop strategies against bacterial resistance. METHODS:  In order to compare antibiotic consumption between regions, a standardized contrast was utilized, specifically using the defined daily dose (DDD). An Orthogonal Contrast test was performed to test the means, followed by the application of the Student's t-test on these contrasts. This analysis aimed to assess the potential influence of regions on DDD values. Antibiotic consumption data were collected between January 2021 and December 2022 from the Local Health Authority of Naples 3 South (LHANS) in Italy and IMS Health, Q Quintiles, and VIA by way of (IQVIA) reports in Costa Rica. RESULTS:  LHANS shows a considerable disparity in gross expenditure compared to Italy's overall expenditure, while the private sector of Costa Rica exhibits even lower gross expenditure than Italy. Antibiotic consumption in Italy exceeds that of Costa Rica, with Costa Rica's consumption amounting to 47.70% of Italy's total consumption. Additionally, LHANS exhibited a 22.43% higher gross expenditure compared to the Campania region, emphasizing the variability in antibiotic usage within the same country The results indicated no statistically significant differences in antibiotic consumption between the regions, as none of the null hypotheses were rejected. CONCLUSIONS: The study provides valuable insights into expenditure patterns and antibiotic consumption, highlighting the need for improved prescribing practices and awareness campaigns to address the issue of antibiotic resistance. The findings emphasize the importance of implementing international guidelines to combat the growing threat of antibiotic resistance and ensure the effective management of infectious diseases.

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BACKGROUND: The coronavirus disease 2019 (COVID-19) pandemic may have impacted outpatient antibiotic prescribing in low- and middle-income countries such as Brazil. However, outpatient antibiotic prescribing in Brazil, particularly at the prescription level, is not well-described. METHODS: We used the IQVIA MIDAS database to characterize changes in prescribing rates of antibiotics commonly prescribed for respiratory infections (azithromycin, amoxicillin-clavulanate, levofloxacin/moxifloxacin, cephalexin, and ceftriaxone) among adults in Brazil overall and stratified by age and sex, comparing prepandemic (January 2019-March 2020) and pandemic periods (April 2020-December 2021) using uni- and multivariate Poisson regression models. The most common prescribing provider specialties for these antibiotics were also identified. RESULTS: In the pandemic period compared to the prepandemic period, outpatient azithromycin prescribing rates increased across all age-sex groups (incidence rate ratio [IRR] range, 1.474-3.619), with the greatest increase observed in males aged 65-74 years; meanwhile, prescribing rates for amoxicillin-clavulanate and respiratory fluoroquinolones mostly decreased, and changes in cephalosporin prescribing rates varied across age-sex groups (IRR range, 0.134-1.910). For all antibiotics, the interaction of age and sex with the pandemic in multivariable models was an independent predictor of prescribing changes comparing the pandemic versus prepandemic periods. General practitioners and gynecologists accounted for the majority of increases in azithromycin and ceftriaxone prescribing during the pandemic period. CONCLUSIONS: Substantial increases in outpatient prescribing rates for azithromycin and ceftriaxone were observed in Brazil during the pandemic with prescribing rates being disproportionally different by age and sex. General practitioners and gynecologists were the most common prescribers of azithromycin and ceftriaxone during the pandemic, identifying them as potential specialties for antimicrobial stewardship interventions.

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BACKGROUND: The impact of coronavirus disease 2019 (COVID-19) on antimicrobial use (AU) and resistance has not been well evaluated in South America. These data are critical to inform national policies and clinical care. METHODS: At a tertiary hospital in Santiago, Chile, between 2018 and 2022, subdivided into pre- (3/2018-2/2020) and post-COVID-19 onset (3/2020-2/2022), we evaluated intravenous AU and frequency of carbapenem-resistant Enterobacterales (CRE). We grouped monthly AU (defined daily doses [DDD]/1000 patient-days) into broad-spectrum ß-lactams, carbapenems, and colistin and used interrupted time-series analysis to compare AU during pre- and post-pandemic onset. We studied the frequency of carbapenemase-producing (CP) CRE and performed whole-genome sequencing analyses of all carbapenem-resistant (CR) Klebsiella pneumoniae (CRKpn) isolates collected during the study period. RESULTS: Compared with pre-pandemic, AU (DDD/1000 patient-days) significantly increased after the pandemic onset, from 78.1 to 142.5 (P < .001), 50.9 to 110.1 (P < .001), and 4.1 to 13.3 (P < .001) for broad-spectrum ß-lactams, carbapenems, and colistin, respectively. The frequency of CP-CRE increased from 12.8% pre-COVID-19 to 51.9% after pandemic onset (P < .001). The most frequent CRE species in both periods was CRKpn (79.5% and 76.5%, respectively). The expansion of CP-CRE harboring blaNDM was particularly noticeable, increasing from 40% (n = 4/10) before to 73.6% (n = 39/53) after pandemic onset (P < .001). Our phylogenomic analyses revealed the emergence of two distinct genomic lineages of CP-CRKpn: ST45, harboring blaNDM, and ST1161, which carried blaKPC. CONCLUSIONS: AU and the frequency of CP-CRE increased after COVID-19 onset. The increase in CP-CRKpn was driven by the emergence of novel genomic lineages. Our observations highlight the need to strengthen infection prevention and control and antimicrobial stewardship efforts.

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An antimicrobial consumption (AMC) study was performed in Trinidad and Tobago at the Eastern Regional Health Authority (ERHA). A retrospective, cross-sectional survey was conducted from 1 November 2021 to 30 March 2022. Dosage and package types of amoxicillin, azithromycin, co-amoxiclav, cefuroxime, ciprofloxacin, levofloxacin, moxifloxacin, nitrofurantoin and co-trimoxazole were investigated. Consumption was measured using the World Health Organization's Antimicrobial Resistance and Consumption Surveillance System methodology version 1.0, as defined daily doses (DDD) per 1000 population per day (DID). They were also analyzed using the 'Access', 'Watch' and 'Reserve' classifications. In the ERHA, AMC ranged from 6.9 DID to 4.6 DID. With regards to intravenous formulations, the 'Watch' group displayed increased consumption, from 0.160 DID in 2017 to 0.238 DID in 2019, followed by a subsequent drop in consumption with the onset of the COVID-19 pandemic. Oral co-amoxiclav, oral cefuroxime, oral azithromycin and oral co-trimoxazole were the most highly consumed antibiotics. The hospital started off as the higher consumer of antibiotics, but this changed to the community. The consumption of 'Watch' group antibiotics increased from 2017 to 2021, with a drop in consumption of 'Access' antibiotics and at the onset of COVID-19. Consumption of oral azithromycin was higher in 2021 than 2020.

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A descriptive design was carried out studying the correlation between antimicrobial consumption and resistance profiles of ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter spp.) in a Peruvian hospital, including the surgical, clinical areas and the intensive care unit (ICU) during the time period between 2015 and 2018. There was a significant correlation between using ceftazidime and the increase of carbapenem-resistant Pseudomonas aeruginosa isolations (R = 0.97; p < 0.05) and the resistance to piperacillin/tazobactam in Enterobacter spp. and ciprofloxacin usage (R = 0.97; p < 0.05) in the medical wards. The Pseudomonas aeruginosa resistance to piperacillin/tazobactam and amikacin in the intensive care unit (ICU) had a significant reduction from 2015 to 2018 (67% vs. 28.6%, 65% vs. 34.9%, p < 0.001). These findings give valuable information about the rates and dynamics in the relationship between antibiotic usage and antimicrobial resistance patterns in a Peruvian hospital and reinforce the need for continuous support and assessment of antimicrobial stewardship strategies, including microbiological indicators and antimicrobial consumption patterns.

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INTRODUCTION: The increasing resistance to antibiotics is a public health problem and an imminent therapeutic challenge in hospitals. In this report we aimed to analyze the relationship between antimicrobial resistance and antibiotic consumption in a third-level pediatric hospital. METHODOLOGY: A cross-sectional analysis was conducted using the information from the microbiology and pharmacy databases of the Pediatric Hospital "Doctor Silvestre Frenk Freund", during the period 2015-2018. Prevalence of antimicrobial resistance by microorganisms and dispensed grams of selected antibiotics were calculated annually. Antibiotic resistance trend over the time was evaluated using the Chi-square trends test and to assess the correlation between the dispensed grams of antibiotics with their antimicrobial resistance prevalence, we calculated the Pearson's coefficient (r). RESULTS: A total of 4,327 isolated bacterial samples were analyzed (56.5% Gram-positive and 44.5% Gram-negative). Most frequently isolated microorganisms were coagulase-negative staphylococci (CoNS), E. coli, K. pneumoniae, P. aeruginosa and S. aureus. We found a significant increase in resistance to clindamycin and oxacillin for CoNS and significant decrease in nitrofurantoin and amikacin resistance for E. coli and K. pneumoniae. We observed a strong positive and statistically significant correlation between amikacin resistance prevalence and amikacin dispensed grams for P. aeruginosa (r = 0.95, p = 0.05). CONCLUSIONS: The antibiotic resistance profile showed by our study highlights the need of an appropriate antibiotic control use in the Hospital setting.

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Animal breeding for meat production based on swine, cattle, poultry, and aquaculture is an activity that generates several impacts on the environment, among them the spread of antibiotic resistance. There is a worldwide concern related to the massive use of antibiotics, which causes selective pressure on the microbial community, triggering bacteria that contain "antibiotic resistance genes." According to the survey here presented, antibiotic resistance-related genes such as tetracyclines (tet), erythromycin (erm), and sulfonamides (sul), as well as the genetic mobile element interferon (int), are the most reported genetic elements in qualitative and quantitative studies of swine, cattle, poultry, and aquaculture manure/wastewater. It has been observed that biological treatments based on waste composting and anaerobic digestion are effective in ARG removal, particularly for tet, bla, erm, and qnr (quinolone) genes. On the other hand, sul and intI genes were more persistent in such treatments. Tertiary treatments, such advanced oxidative processes, are suitable strategies to improve ARG reduction. In general temperature, hydraulic retention time, and penetration of sunlight are the main operational parameters for ARG reduction in treatments applied to animal waste, and therefore attention should be addressed to optimize their efficacy regarding ARG removal. Despite being reduced, the presence of ARG in treated effluents and in biosolids indicates that there is a potential risk of antibiotic resistance spread in nature, especially through the release of treated livestock waste into the environment.

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INTRODUCTION: Antimicrobial stewardship programmes (ASPs) are recommended to improve antibiotic use in healthcare and reduce antimicrobial resistance (AMR). Our aim was to investigate the effectiveness of ASPs in reducing antibiotic consumption, use of broad-spectrum/restricted antibiotics, antibiotic resistance and healthcare-associated infections (HAIs) in neonates. METHODS: We searched PUBMED, SCIELO, EMBASE and the Cochrane Database (January 2000-April 2019) to identify studies on the effectiveness of ASPs in neonatal wards and/or neonatal intensive care units (NICUs). Outcomes were as follows: reduction of antibiotic consumption overall and of broad-spectrum/target antibiotics, inappropriate antibiotic use, antibiotic resistance and HAIs. ASPs conducted in settings other than acute care hospitals, for children older than 1 month, and ASPs addressing antifungal and antiviral agents, were excluded. RESULTS: The initial search identified 53 173 titles and abstracts; following the application of filters and inclusion criteria, a total of six publications were included in the final analysis. All studies, of which one was multi-centre study, were published after 2010. Five studies were conducted exclusively in NICUs. Four articles applied multimodal interventions. Reduction of antibiotic consumption overall and/or inappropriate antibiotic use were reported by four articles; reduction of broad-spectrum/targeted antibiotics were reported by four studies; No article evaluated the impact of ASPs on AMR or the incidence of HAI in neonates. CONCLUSION: ASPs can be effectively applied in neonatal settings. Limiting the use of broad-spectrum antibiotics and shorting the duration of antibiotic treatment are the most promising approaches. The impact of ASPs on AMR and HAI needs to be evaluated in long-term studies.

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BACKGROUND: The inappropriate use of antimicrobials and increased rates of antimicrobial resistance is a challenge all over the world. Although antibiotic stewardship is recommended by the Brazilian government, data regarding antibiotic use in Brazilian hospitals are scarce. The aim of this study was to conduct a point prevalence survey of antimicrobial use in 18 Brazilian hospitals. METHODS: Eighteen Brazilian hospitals conducted the Global Point Prevalence Survey of Antimicrobial Consumption and Resistance (Global-PPS) in 2017. The study enrolled inpatients on antimicrobials. Data collection included details on the antimicrobial prescriptions. A web-based programme was used for data-entry, validation and reporting. The Global-PPS was developed by the University of Antwerp and bioMérieux provided funding support. FINDINGS: A total of 1801 patients were evaluated, of which 941 (52.2%) were on antimicrobials. Four hundred (42.5%) patients were given at least two antimicrobials. Out of the 1317 antibacterials for systemic use, 514 (39%) were prescribed for community-acquired infections, 533 (40.5%) for healthcare-associated infections and 248 (18.8%) for prophylactic use. The most frequently used antimicrobials were ceftriaxone (12.8%), meropenem (12.3%) and vancomycin (10.3%). Pneumonia or lower respiratory tract infection was the most common site of infection (29.2%). In general, antimicrobials were given mainly parenterally (91%) and empirically (81.2%). CONCLUSIONS: A high prevalence of antibiotic use was observed in the 18 Brazilian hospitals. The antibiotics were prescribed mainly empirically. Intravenous broad-spectrum antibiotics were the most frequent antimicrobials used, showing that reinforcement of de-escalation strategy is needed. The Global-PPS data can be very useful for monitoring stewardship programmes and intervention.

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OBJECTIVE: The aim of this study was to determine the impact of two resolutions to restrict antibiotic use (RDCs no. 44/2010 and 20/2011) in the Campinas metropolitan area (Sao Paulo, Brazil) on antibiotic consumption, resistance rates, and trends in Escherichia coli-causing community-acquired urinary tract infection (UTI). METHODS: The annual retail sale information of antibiotics from drugstores in the Campinas metropolitan area between 2008 and 2012 were obtained through the Intercontinental Medical Statistics Health of Brazil. The daily-defined dose (DDD)/1000 inhabitants/day was calculated from these data to measure consumption. To examine resistance rates, we performed an observational retrospective study in a Campinas teaching hospital, where urinary cultures from outpatients with a clinical suspicion of UTI between October 2009 and September 2015 were analyzed. RESULTS: We observed an increase in rates of antibiotic sales from 2008 to 2011 (cephalosporin: 216.8%, quinolones: 170.9%, aminopenicillins: 140.9%), followed by a decrease in sales in 2012 (cephalosporin: 19.4%, quinolones: 12.7%, aminopenicillins: 11.1%). Sale of nitrofurans, however, did not significantly change during this period. In the retrospective analysis, we observed a significant increasing trend of E. coli resistance for all antibiotic classes, except nitrofurans and folate pathway inhibitors. CONCLUSIONS: We found changes in antibiotic consumption, with an initial increase, followed by a decrease in sales after implementation of the resolutions. However, bacterial resistance does not appear to be affected by the RDCs.

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OBJECTIVE: To analyse the prevalent microorganisms and their antimicrobial resistance among intensive care unit patients in a tertiary care centre in New Delhi. METHODS: A retrospective study of all consecutive blood cultures from various intensive care unit patients in the hospital during four years (January 2008 to December 2011). Antibiotic consumption data in the intensive care units were also analysed during the same period. RESULTS: Out of the total 22,491 blood cultures processed, 2846 samples were positive and 3771 microorganisms were isolated. The blood culture positivity was estimated as 12.7% of which 67.5% were monomicrobial and 32.5% polymicrobial infections. Gram negative bacilli, Gram positive cocci, and fungi were isolated in 49%, 33%, and 18% cases, respectively. Coagulase negative staphylococcus was the commonest single isolate followed by Candida spp. A drastic shift in the distribution of Candida spp. towards nonalbicans along with high resistance to azole group of antifungals suggest echinocandins for the empiric therapy of candidemia. High penicillin resistance in Gram positive isolates suggest vancomycin, linezolid and tigecycline as the options for empiric therapy, whereas tigecycline and colistin are the only options remaining for highly resistant Gram negative isolates. Aminoglycosides were observed to have better sensitivity and reduced usage when compared with cephalosporins and ß-lactam + ß-lactam inhibitor combinations. CONCLUSIONS: High frequencies of multidrug resistant organisms were observed in intensive care units which is a warning as to use the only few effective antimicrobials wisely to reduce selective pressure on sensitive strains. .

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OBJECTIVE: To analyse the prevalent microorganisms and their antimicrobial resistance among intensive care unit patients in a tertiary care centre in New Delhi. METHODS: A retrospective study of all consecutive blood cultures from various intensive care unit patients in the hospital during four years (January 2008 to December 2011). Antibiotic consumption data in the intensive care units were also analysed during the same period. RESULTS: Out of the total 22,491 blood cultures processed, 2846 samples were positive and 3771 microorganisms were isolated. The blood culture positivity was estimated as 12.7% of which 67.5% were monomicrobial and 32.5% polymicrobial infections. Gram negative bacilli, Gram positive cocci, and fungi were isolated in 49%, 33%, and 18% cases, respectively. Coagulase negative staphylococcus was the commonest single isolate followed by Candida spp. A drastic shift in the distribution of Candida spp. towards nonalbicans along with high resistance to azole group of antifungals suggest echinocandins for the empiric therapy of candidemia. High penicillin resistance in Gram positive isolates suggest vancomycin, linezolid and tigecycline as the options for empiric therapy, whereas tigecycline and colistin are the only options remaining for highly resistant Gram negative isolates. Aminoglycosides were observed to have better sensitivity and reduced usage when compared with cephalosporins and ß-lactam+ß-lactam inhibitor combinations. CONCLUSIONS: High frequencies of multidrug resistant organisms were observed in intensive care units which is a warning as to use the only few effective antimicrobials wisely to reduce selective pressure on sensitive strains.

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INTRODUCTION: Antimicrobial resistance is an increasing threat in hospitalized patients, and inappropriate empirical antimicrobial therapy is known to adversely affect outcomes in ventilator-associated pneumonia (VAP). The aim of this study was to evaluate antimicrobial usage, incidence, etiology, and antimicrobial resistance trends for prominent nosocomial pathogens causing ventilator-associated pneumonia in a clinical-surgical intensive care unit (ICU). METHODS: Gram-negative bacilli and Staphylococcus aureus causing VAP, as well as their antimicrobial resistance patterns and data on consumption (defined daily dose [DDD] per 1,000 patient days) of glycopeptides, extended-spectrum cephalosporins, and carbapenems in the unit were evaluated in two different periods (A and B). RESULTS: Antimicrobial use was high, mainly of broad-spectrum cephalosporins, with a significant increase in the consumption of glycopeptides (p < 0.0001) and carbapenems (p < 0.007) in period B. For Acinetobacter baumannii and members of the Enterobacteriaceae family, 5.27- and 3.06-fold increases in VAPs, respectively, were noted, and a significant increase in resistance rates was found for imipenem-resistant A. baumannii (p = 0.003) and third-generation cephalosporins-resistant Enterobacteriaceae (p = 0.01) isolates in this same period. CONCLUSIONS: Our results suggest that there is a link between antibiotics usage at institutional levels and resistant bacteria. The use of carbapenems was related to the high rate of resistance in A. baumannii and therefore a high consumption of imipenem/meropenem could play a major role in selective pressure exerted by antibiotics in A. baumannii strains.

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INTRODUCTION: his study evaluated the consumption of major classes of antibiotics, the colonization of the oropharynx of patients on mechanical ventilation, and the risk of ventilator-associated pneumonia (VAP) caused by Staphylococcus aureus in an intensive care unit for adults. METHODS: A case-control study was carried out using colonized patients (cases) by oxacillin-resistant S. aureus (ORSA) and (controls) oxacillin-sensitive S. aureus (OSSA) from May 2009 to August 2010. The occurrence of VAP by S. aureus was also evaluated in the same period. Antibiotic consumption was expressed as the number of defined daily doses (DDD)/1,000 patient-days for glycopeptides, carbapenems, and extended-spectrum cephalosporins. RESULTS: Three hundred forty-six (56.1 percent) patients underwent mechanical ventilation with a frequency of oropharyngeal colonization of 36.4 percent, corresponding to 63.5 percent for ORSA and 36.5 percent for OSSA. The risk of illness for this organism was significant (p<0.05), regardless of whether colonization/infection was by ORSA or OSSA. The consumption of antibiotics was high, mainly for broad-spectrum cephalosporins (551.26 DDDs/1,000 patient-days). The high density of use of glycopeptides (269.56 DDDs/1,000 patient-days) was related to colonization by ORSA (Pearson r=0.57/p=0.02). Additionally, age >60 years, previous antibiotic therapy, and previous use of carbapenems were statistically significant by multivariate analysis. CONCLUSIONS: There was a significant relationship between the colonization of the oropharyngeal mucosa and the risk of VAP by both phenotypes. The use of glycopeptides was related to colonization by ORSA.

INTRODUÇÃO: Este estudo avaliou o consumo das principais classes de antibióticos, a colonização de orofaringe de pacientes sob ventilação mecânica e o risco de pneumonia associada à ventilação (PAV) causada por Staphylococcus aureus em uma unidade de terapia intensiva (UTI) de adultos. MÉTODOS: Foi realizado um estudo caso-controle, sendo caso os pacientes colonizados pelo oxacillin-resistant Staphylococcus aureus (ORSA), e controle aqueles pelo oxacillin-sensitive Staphylococcus aureus (OSSA), no período de maio de 2009 a agosto de 2010. A ocorrência de PAVs por S. aureus também foi avaliada no mesmo período. O consumo de antibióticos foi expresso pelo número de doses diárias definidas (DDDs)/1.000 pacientes-dia para glicopeptídeos, carbapenêmicos e cefalosporinas de amplo espectro. RESULTADOS: Trezentos e quarenta e seis (56,1 por cento) dos pacientes foram submetidos à ventilação mecânica com uma frequência de colonização de orofaringe de 36,4 por cento, correspondendo a 63,5 por cento e 36,5 por cento de ORSA e OSSA, respectivamente. O risco de adoecimento por este microrganismo foi significativo (p<0,05), considerando se a colonização/infecção foi por ORSA ou OSSA. O consumo de antibióticos foi alto, principalmente para cefalosporinas de amplo espectro (551,26 DDDs/1.000 pacientes-dia). A elevada densidade de uso de glicopetídeos (269,56 DDDs/1.000) foi relacionada com a colonização pelo ORSA (Pearson r=0.57/p=0.02). Adicionalmente, idade > 60 anos, terapia antibiótica prévia e uso prévio de carbapenêmicos foram estatisticamente significantes por análise multivariada. CONCLUSÕES: Foi observada uma relação significativa entre a colonização da mucosa de orofaringe e o risco de PAV por ambos fenótipos. O uso de glicopeptídos foi relacionado com a colonização pelo ORSA.

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Se han descrito varios programas para el uso racional de los antibióticos. Nosotros implementamos una sistemática de diagnóstico y tratamiento de infecciones en Unidad de Cuidados Intensivos (UCI) basados en el control como método estratégico de aplicación. La disminución del consumo total de antibióticos fue de 2454,87 DDD/100 pacientes/día (Dosis Diaria Definida/100 pac) en el 2003 a 1505,54 DDD/100 pacientes /día en el 2004 (61,32), (p < 0.0001). El ahorro en el gasto alcanzó 21.429 $ , de 69.958 $ en el 2003 a 48.529 $ en el 2004 (69,36%). No afectó el promedio de días de estada en UCI, que fue de 5.38 días en el 2003 y 4.89 días en el 2004 (p < 0.79 ), ni la mortalidad, que fue de 43.22% en el 2003 y 38.85% en el 2004 (p < 0,25). Los pacientes /día aumentaron de 1695 en el 2003 a 2059 en el 2004 (p 0.01). Se tomó a referencia la Tasa de Resistencia de P.Aeruginosa a Imipenem, que varió de 66% a 0% (p < 0.03) del 2003 al 2004 respectivamente, y la de A. Baumanni a Imipenem, que fue de 34% en el 2003 y de 36% en el 2004 (p 0.93). Las infecciones respiratorias fueron 18.70% en el 2003 y de 7,42% en el 2004 (p< 0.0001), sin cambio en el resto. La sistemática de diagnóstico y tratamiento de infecciones en la UCI disminuyó el consumo y costo de antibióticos. Sin embargo, otros estudios capaces de controlar mejor posibles variables confundidoras, son necesarios para obtener un mayor nivel de medicina basada en la evidencia y lograr así, que más médicos se sumen al uso apropiado de antibióticos(AU)

Diagnose and treatment of infections in ICU: An effective strategy for the rational use of antibiotics Several programes for the rational use of antibiotic have been described. We implemented a systematics of diagnosis and treatment of infections in the ICU, based on control as strategic method of application. The global consumption of antibiotics decreased from 2454.87 DDD/100 PTE/ DAY in 2003 to 1505.54 ddd/100 PTE DAY in 2004 (61,32), (P<0.0001). Savings in antibiotic expenditures reached $ 21.429, $ 69.958 in 2003 and $ 48.529 in 2004 (69.36%). It did not affect the staying days average which was 5.38 days in 2003 and 4.89 in 2004 (p<0.79), or mortality, wich was 43.22% in 2003 and 38.85% in 2004 (p<0.25).The patient/day increased form 1695 in 2003 to 2059 in 2004 (p 0.01).We chose as reference the Resistance Rate for P. Aeruginosa to Imipenem, that varied from 66% to 0% (p<0.03) in 2003 and 2004 respectively and the A.Baumanii to Imipenem, of 34% to 36% in the same períod (p0.93). The incidence of respiratory infections was 18.70% in 2003 and 7.42% in 2004 (p 0.0001), with no variation in other infections rates. Our sistematics of diagnosis and treatment for infections in ICU resulted in lower cost and consumption of antibiotics Nevertherless, other studies capable of controlling better possible confounder variables are necessary to obtain a greater evidence of the protocol we used and achieve more physician get involved in the appropiate use of antibiotics.(AU)

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