Differences In Antibiotic Use Research Articles

Detrimental effects of secondhand smoke exposure on infants with cystic fibrosis

Secondhand smoke (SHS) has deleterious respiratory, immune, and nutritional effects in children, but there is little data regarding the effects of SHS exposure in infants with cystic fibrosis (CF). A retrospective chart review was undertaken from 2008 to 2012 of 75 infants with CF. Growth, lung function, Chest CT imaging, and microbiologic characteristics were compared between 4 and 12 months for SHS and non-SHS exposed patients. SHS exposed infants with CF had decreased growth between 4 and 12 months compared to non-SHS exposed infants. SHS exposure was associated with increased bronchodilator responsiveness and air trapping, but no other lung function or radiologic differences. SHS exposure was also associated with increased methicillin resistant Staphylococcus aureus (MRSA) and anaerobic growth on respiratory culture. There was no difference in Pseudomonas aeruginosa between groups. There were no differences in antibiotic use or hospitalizations between the groups. SHS exposure in CF infants is associated with diminished growth, increased air trapping and bronchodilator responsiveness, and propensity to culture MRSA and facultative anaerobic bacteria, suggesting the need for early, aggressive parental smoking cessation interventions to prevent SHS exposure complications.

Molecular Characterizations of PCR-Positive Mycoplasma pneumoniae Specimens Collected from Australia and China

Mycoplasma pneumoniae is an important cause of community-acquired pneumonia (CAP). In this study, M. pneumoniae strains in PCR-positive specimens collected from patients in Sydney, Australia (30 samples), and Beijing, China (83 samples), were characterized using multilocus variable-number tandem-repeat (VNTR) analysis (MLVA), P1-restriction fragment length polymorphism (RFLP) analysis, and sequencing of domain V of the 23S rRNA gene to compare genotype distribution and macrolide resistance rates between locations. Eighteen distinct MLVA types were identified in specimens from Sydney, of which 10 were known (types E, G, J, M, N, P, U, V, S, and X) and 8 previously unknown. Strains were equally distributed between P1-RFLP type 1 and type 2 variants. Among samples from Beijing, MLVA types E, G, J, P, U, X, and Z and four new types were identified. Most specimens belonged to P1-RFLP type 1. A nomenclature based on five VNTR loci is proposed to designate MLVA patterns. Macrolide resistance-associated mutations were identified in only 1 of 30 specimens (3.3%) from Sydney and 71 of 83 (85.5%) from Beijing (P<0.05). This study demonstrated that although multiple individual M. pneumoniae strains were circulating in Beijing, the genotypes were less diverse than those in Sydney. However, the greatest regional difference was in the incidence of macrolide resistance, which may reflect differences in antibiotic use and/or measures in resistance control.

DI-100 Comparison of antibiotic prescribing for paediatric lower respiratory tract infections in three paediatric hospitals in the UK, France and Latvia

BackgroundThe most common indications for antibiotic use in hospitalised children are lower respiratory tract infections (LRTI). The point prevalence survey (PPS) allows targets to be identified for quality improvement. Comparing...

Cultural determinants of infection control behaviour: understanding drivers and implementing effective change

Despite dealing with biomedical practices, infection prevention and control (IPC) is essentially a behavioural science. Human behaviour is influenced by various factors, including culture. Hofstede's model of cultural dimensions proposes that national cultures vary along consistent dimensions which can be grouped and scored as specific constructs. Studies have reported that three Hofstede constructs--power distance, uncertainty avoidance, and masculinity--show significant association with several key performance indicators relevant to IPC and antibiotic stewardship. In addition, national meticillin-resistant Staphylococcus aureus (MRSA) levels within Europe correlate well with general quality-of-care indices, including preventive strategies and patient rights. This suggests that IPC may be simply a microcosm of overall quality and safety standards within hospitals and countries. Effective improvement would therefore need to address underlying and embedded core cultural values relevant to patient safety and quality of care. Successful IPC strategies are likely to be those that are compatible with the cultural background where they are implemented. To this end, content analysis of many current IPC improvement tools identifies elements of strong compatibility with cultures that are low in uncertainty avoidance and power distance, and high in individualism and masculinity. However, this cultural combination is largely restricted to Anglo-Saxon countries, where most of the recent improvements in healthcare-associated infection (HCAI) incidence have taken place. There is a paucity of research on IPC behaviour change in different cultural backgrounds, especially countries that score high for power distance and/or uncertainty avoidance. This information is vital to inform IPC campaigns in these countries, which often show high HCAI prevalence.

Impact of a Bronchiolitis Guideline on ED Resource Use and Cost: A Segmented Time-Series Analysis

Bronchiolitis is a major cause of infant morbidity and contributes to millions of dollars in health care costs. Care guidelines may cut costs by reducing unnecessary resource utilization. Through the implementation of a guideline, we sought to reduce unnecessary resource utilization and improve the value of care provided to infants with bronchiolitis in a pediatric emergency department (ED). We conducted an interrupted time series that examined ED visits of 2929 patients with bronchiolitis, aged 1 to 12 months old, seen between November 2007 and April 2013. Outcomes were proportion having a chest radiograph (CXR), respiratory syncytial virus (RSV) testing, albuterol or antibiotic administration, and the total cost of care. Balancing measures included admission rate, returns to the ED resulting in admission within 72 hours of discharge, and ED length of stay (LOS). There were no significant preexisting trends in the outcomes. After guideline implementation, there was an absolute reduction of 23% in CXR (95% confidence interval [CI]: 11% to 34%), 11% in RSV testing (95% CI: 6% to 17%), 7% in albuterol use (95% CI: 0.2% to 13%), and 41 minutes in ED LOS (95% CI: 16 to 65 minutes). Mean cost per patient was reduced by $197 (95% CI: $136 to $259). Total cost savings was $196,409 (95% CI: $135,592 to $258,223) over the 2 bronchiolitis seasons after guideline implementation. There were no significant differences in antibiotic use, admission rates, or returns resulting in admission within 72 hours of discharge. A bronchiolitis guideline was associated with reductions in CXR, RSV testing, albuterol use, ED LOS, and total costs in a pediatric ED.

Differences in antibiotic use and knowledge between adolescent and adult mothers in Ecuador

Objectives: To investigate the differences in antibiotic use and knowledge between adolescent and adult mothers of children under the age of 5 years in Ecuador.Methods: A cross sectional study was performed in four health centers and hospitals. Mothers of children under five years, seeking medical attention their child's upper respiratory tract infection (URI), were included. The data was collected through interviews, using a structured questionnaire. The questionnaire covered the topics knowledge of antibiotic treatment, risk and resistance. Results: 777 mothers were included in the study, of which 15.8% were adolescent and 84.1% adult mothers. There were significant differences in the social and economic characteristics of the mothers (p ≤ 0.05), with adolescent mothers being more likely to have an incomplete high school education and lack of basic services in their home. Significant differences between these groups were found in adherence to treatment, knowledge about risks associated with antibiotic use, and having heard of antibiotic resistance. Among the adult mothers, 83.5% reported correct adherence, 28.5% were knowledgeable about risks associated with antibiotic use, and 29.3% had heard of antibiotic resistance. Among the adolescent mothers, these numbers were 75.4%, 15.0%, and 19.8%, respectively.Conclusions: To develop successful interventions, it is crucial to understand the factors causing differences in antibiotic use and knowledge between mothers.

Differences in antibiotic use and knowledge between adolescent and adult mothers in Ecuador

Objectives: To investigate the differences in antibiotic use and knowledge between adolescent and adult mothers of children under the age of 5 years in Ecuador. Methods: A cross sectional study was performed in four health centers and hospitals. Mothers of children under five years, seeking medical attention their child's upper respiratory tract infection (URI), were included. The data was collected through interviews, using a structured questionnaire. The questionnaire covered the topics knowledge of antibiotic treatment, risk and resistance. Results: 777 mothers were included in the study, of which 15.8% were adolescent and 84.1% adult mothers. There were significant differences in the social and economic characteristics of the mothers (p ≤ 0.05), with adolescent mothers being more likely to have an incomplete high school education and lack of basic services in their home. Significant differences between these groups were found in adherence to treatment, knowledge about risks associated with antibiotic use, and having heard of antibiotic resistance. Among the adult mothers, 83.5% reported correct adherence, 28.5% were knowledgeable about risks associated with antibiotic use, and 29.3% had heard of antibiotic resistance. Among the adolescent mothers, these numbers were 75.4%, 15.0%, and 19.8%, respectively. Conclusions: To develop successful interventions, it is crucial to understand the factors causing differences in antibiotic use and knowledge between mothers.

Differences in antibiotic use and knowledge between adolescent and adult mothers in Ecuador

To investigate the differences in antibiotic use and knowledge between adolescent and adult mothers of children under the age of 5 years in Ecuador. A cross sectional study was performed in four health centers and hospitals. Mothers of children under five years, seeking medical attention their child's upper respiratory tract infection (URI), were included. The data was collected through interviews, using a structured questionnaire. The questionnaire covered the topics knowledge of antibiotic treatment, risk and resistance. 777 mothers were included in the study, of which 15.8% were adolescent and 84.1% adult mothers. There were significant differences in the social and economic characteristics of the mothers (p ≤ 0.05), with adolescent mothers being more likely to have an incomplete high school education and lack of basic services in their home. Significant differences between these groups were found in adherence to treatment, knowledge about risks associated with antibiotic use, and having heard of antibiotic resistance. Among the adult mothers, 83.5% reported correct adherence, 28.5% were knowledgeable about risks associated with antibiotic use, and 29.3% had heard of antibiotic resistance. Among the adolescent mothers, these numbers were 75.4%, 15.0%, and 19.8%, respectively. To develop successful interventions, it is crucial to understand the factors causing differences in antibiotic use and knowledge between mothers.

Indicators show differences in antibiotic use between general practitioners and paediatricians

The purpose of this investigation was to adapt to an individual physician level and to the paediatric context a set of drug-specific indicators of outpatient antibiotic use developed by the European Surveillance of Antimicrobial Consumption (ESAC) project, and to describe the differences in antibiotic prescriptions between general practitioners (GPs) and paediatricians. We conducted a retrospective cross-sectional study analysing antibiotic prescriptions in 2009 for children below 16 years of age in south-eastern France, using the National Health Insurance (NHI) outpatient reimbursement database. A generalised linear model adjusted on physicians' characteristics and patient population characteristics was used to compare indicators between GPs and paediatricians. We included 4,921 self-employed GPs and 301 paediatricians. Penicillins accounted for 47% and 45% of all antibiotics prescribed by GPs and paediatricians, respectively, followed by cephalosporins (33% and 39%) and macrolides (14% and 9%). In both specialties, there were around 70% more antibiotic prescriptions during the winter quarters compared to the summer quarters. The 13 indicators we calculated showed wide variations in antibiotic prescriptions among GPs, among paediatricians, and between GPs and paediatricians. In an adjusted econometric model, GPs were found to issue 54% more antibiotic prescriptions than paediatricians, whereas paediatricians used a significantly higher proportion of co-amoxiclav (18% vs. 12%) and cephalosporins (39% vs. 33%) and a significantly lower proportion of macrolides (9% vs. 14%) compared to GPs. A set of 13 indicators may be calculated using reimbursement data to describe outpatient antibiotic use at the physician level. We observed very different prescribing profiles between GPs and paediatricians.

42 Antibiotic Use in Infants in the First Year of Life in Five European Countries

Background and aimsIn view of antibiotic resistance problems and development of atopic diseases there is a need to improve the appropriateness of antibiotic use, especially in young children. Antibiotics are...

Fluticasone furoate nasal spray reduces symptoms of uncomplicated acute rhinosinusitis: a randomised placebo-controlled study

Uncomplicated acute rhinosinusitis (ARS) is usually a self-limiting inflammatory condition often treated with antibiotics. To assess the safety and efficacy of fluticasone furoate nasal spray (FFNS) compared with placebo for symptomatic relief of uncomplicated ARS. A randomised, double-blind, placebo-controlled, parallel-group, multicentre, 2-week treatment study of FFNS 110 μg once and twice daily was undertaken in adults/adolescents. A statistically significant reduction was seen in the daily major symptoms score, a composite score of three individual symptoms (nasal congestion/stuffiness, sinus headache/pressure or facial pain/pressure, and postnasal drip on a 0-3 scale) by both FFNS doses compared with placebo (least square mean differences vs. placebo of -0.386 (p=0.008) and -0.357 (p=0.014) for once daily and twice daily FFNS, respectively). The differences in median times to symptom improvement were not statistically significant between each dose of FFNS (7 days) and placebo (8 days). There were no treatment differences in antibiotic use for possible fulminant bacterial rhinosinusitis (3% in each group). The safety profile of FFNS was similar to placebo. FFNS reduces symptoms of uncomplicated ARS compared with placebo and is well tolerated, providing support for withholding antibiotics in selected patients.

The EuroPrevall birth cohort study on food allergy: baseline characteristics of 12,000 newborns and their families from nine European countries

It is unclear why some children develop food allergy. The EuroPrevall birth cohort was established to examine regional differences in the prevalence and risk factors of food allergy in European children using gold-standard diagnostic criteria. The aim of this report was to describe pre-, post-natal and environmental characteristics among the participating countries. In nine countries across four major European climatic regions, mothers and their newborns were enrolled from October 2005 through February 2010. Using standardized questionnaires, we assessed allergic diseases and self-reported food hypersensitivity of parents and siblings, nutrition during pregnancy, nutritional supplements, medications, mode of delivery, socio-demographic data and home environmental exposures. A total of 12,049 babies and their families were recruited. Self-reported adverse reactions to food ever were considerably more common in mothers from Germany (30%), Iceland, United Kingdom, and the Netherlands (all 20-22%) compared with those from Italy (11%), Lithuania, Greece, Poland, and Spain (all 5-8%). Prevalence estimates of parental asthma, allergic rhinitis and eczema were highest in north-west (Iceland, UK), followed by west (Germany, the Netherlands), south (Greece, Italy, Spain) and lowest in central and east Europe (Poland, Lithuania). Over 17% of Spanish and Greek children were exposed to tobacco smoke in utero compared with only 8-11% in other countries. Caesarean section rate was highest in Greece (44%) and lowest in Spain (<3%). We found country-specific differences in antibiotic use, pet ownership, type of flooring and baby's mattress. In the EuroPrevall birth cohort study, the largest study using gold-standard diagnostic criteria for food allergy in children worldwide, we found considerable country-specific baseline differences regarding a wide range of factors that are hypothesized to play a role in the development of food allergy including allergic family history, obstetrical practices, pre- and post-natal environmental exposures.

Impact of a Multidisciplinary Intervention on Antibiotic Use for Nursing Home–Acquired Pneumonia

Background Academic detailing in nursing homes (NHs) has been shown to improve drug use patterns and adherence to guidelines. Objective The purpose of this study was to evaluate the impact of a multidisciplinary intervention that included academic detailing on adherence to national nursing home–acquired pneumonia (NHAP) guidelines related to use of antibiotics. Methods This quasi-experimental study evaluated the effects of a 2-year multifaceted and multidisciplinary intervention targeting implementation of national evidence-based guidelines for NHAP. Interventions took place in 8 NHs in Colorado; 8 NHs in Kansas and Missouri served as controls. Interventions included (1) educational sessions for nurses to improve recognition and timely treatment of NHAP symptoms and (2) academic detailing to clinicians by pharmacists regarding diagnostic and prescribing practices. Differences in antibiotic use between groups were compared after 2 intervention years relative to baseline. Results A total of 549 episodes of NHAP were evaluated in the intervention group and 574 in the control group. Compared with baseline, 1 facility in the intervention group significantly improved in guideline adherence for optimal antibiotic use ( P = 0.007), whereas no facilities in the control group improved. The mean adherence score for optimal antibiotic use in intervention NHs increased from 60% to 66%, whereas the control NHs increased from 32% to 39% ( P = 0.3). Mean adherence to guidelines recommending antibiotic use within 4 hours of NHAP diagnosis increased from 57% to 75% in intervention NHs but decreased from 38% to 31% in control NHs ( P = 0.0003 for difference). There was no difference between intervention and control NHs for guideline adherence regarding optimal duration of antibiotic use. Conclusions The ability of this multifaceted study to repeatedly remind nursing staff of the importance of timely antibiotic administration contrasts with its limited academic detailing interaction with clinicians. This difference within the intervention may explain the differential impact of the intervention on antibiotic guideline adherence.

Effect of production system, alternative treatments and calf rearing system on udder health in organic dairy cows

In the last decade the main goals of organic dairying have been to attain acceptable levels of milk production, increase opportunities for animals to perform species own behaviour, resulting in improved animal welfare and animal health, and minimize the use of therapeutic interventions, including the reduction of the (preventive) use of antibiotics. Maintaining animal health without the use of therapeutic interventions is a major challenge for organic dairy farmers. In particular, udder health remains a major problem in both conventional and organic farming. In the QualityLowInputFood (QLIF) project udder health status and management were assessed in different production systems and European regions. These studies suggest that good udder health can be maintained in organic or low-input farming management systems. Novel strategies to control mastitis were evaluated and the potential of using internal teat sealers for the control of environment-associated pathogens was shown. Also oral application of a herd profile based single homeopathic remedy combined with homeopathic silica had a significant effect on cows with a relative low somatic cell count before drying-off. Suckling systems in calf rearing, as an integrated management approach, did not result in better udder health. None of the studies presented identified new variables affecting udder health. QLIF studies also demonstrated the importance of comparing udder health parameters in contrasting organic, low input and conventional production systems, since clear differences in antibiotic use against mastitis could be identified not only between organic and conventional systems, but also among dairy systems used in different EU-countries. Although alternative treatments used in organic systems could not be shown to be fully effective, results suggest that the use of individual or combined alternative strategies to improve udder health on organic or low-input farms warrants further investigation. Based on the results obtained it is recommended that future research should focus on identifying the reasons for variability in udder health between organic farms that use different management protocols to identify ‘best current practice’ when carrying out this research.

Variability in Outpatient Antimicrobial Consumption in Israel

Antibiotic consumption has an important effect on microbial resistance. Nationwide data on the comparative use of antibiotics in outpatient settings in Israel have only been partially collected and published. The aim of our study was to analyze the use of antibiotics in the outpatient setting in Israel and assess a number of influencing factors. Defined daily doses per 1,000 inhabitants per day (DID) of total antibiotic use, consumption in different age groups, and consumption of different antibiotic groups were calculated for the years 2003-2005 in the districts of Israel. The data was collected from prescription data compiled by the pharmaceutical services of "Clalit Health Services", the largest health maintenance organization (HMO) in Israel, covering 55% of the population.Trends in use and variables associated with antibiotic consumption were analyzed. There was a significant decrease in antibiotic use from 2003 to 2005, ranging from 1.8 to 8.2% in the different districts. The highest consumption was noted in the youngest age groups, with more than half of all antibiotics prescribed to children < or = 18 years of age. Antibiotic consumption was significantly different between the different regions in Israel. A multivariate analysis revealed that a higher prevalence of diabetes mellitus was the only significant variable associated with antibiotic use. Variability in the use of different antibiotics was also found; for example, amoxicillin comprised 19.5-33.4% of total antibiotic consumption in the different districts, while fluoroquinolone consumption ranged from 3.2 to 7.3%. Outpatient antibiotic use in the population insured by "Clalit Health Services" declined between 2003 and 2005. Children had the highest consumption rates. There were large differences in antibiotic use between geographic regions, and diabetes mellitus was the only variable significantly associated with antibiotic use. We therefore conclude that most of the differences in antibiotic use are likely due to doctor preferences, local routines, and patients' attitudes and expectations.

Effectiveness of five different approaches in management of urinary tract infection: randomised controlled trial

Objective To assess the impact of different management strategies in urinary tract infections.Design Randomised controlled trial.Setting Primary care.Participants 309 non-pregnant women aged 18-70 presenting with suspected urinary tract infection.Intervention Patients...

C-Reactive Protein Testing Does Not Decrease Antibiotic Use for Acute Cough Illness When Compared to a Clinical Algorithm

Antibiotics are commonly overused in adults seeking emergency department (ED) care for acute cough illness. To evaluate the effect of a point-of-care C-reactive protein (CRP) blood test on antibiotic treatment of acute cough illness in adults. A randomized controlled trial was conducted in a single urban ED in the United States. The participants were adults (age ≥ 18 years) seeking care for acute cough illness (≤ 21 days duration); 139 participants were enrolled, and 131 completed the ED visit. Between November 2005 and March 2006, study participants had attached to their medical charts a clinical algorithm with recommendations for chest X-ray study or antibiotic treatment. For CRP-tested patients, recommendations were based on the same algorithm plus the CRP level. There was no difference in antibiotic use between CRP-tested and control participants (37% [95% confidence interval (CI) 29-45%] vs. 31% [95% CI 23-39%], respectively; p = 0.46) or chest X-ray use (52% [95% CI 43-61%] vs. 48% [95% CI 39-57%], respectively; p = 0.67). Among CRP-tested participants, those with normal CRP levels received antibiotics much less frequently than those with indeterminate CRP levels (20% [95% CI 7-33%] vs. 50% [95% CI 32-68%], respectively; p = 0.01). Point-of-care CRP testing does not seem to provide any additional value beyond a point-of-care clinical decision support for reducing antibiotic use in adults with acute cough illness.

Quantitative disparities in outpatient antibiotic exposure in a Hungarian county

Although antibiotic utilization data expressed in defined daily doses (DDDs)/1000 inhabitants/day are often available for a given period and area, the actual antibiotic exposure of the population is rarely explored. We aimed to identify the real antibiotic exposure of the inhabitants of one Hungarian county. The patient-level dispensing data for 2005 for Csongrád County were retrieved from the database of the Hungarian National Health Fund Administration. The number of antibiotic users was quantified, and differences in antibiotic use (quantity and frequency) were explored. Disparities were revealed by Lorenz curves. A new form of Lorenz curve was also introduced. The DDD values for 2005 were used. In 2005, a total of 486 115 antibiotic prescriptions were redeemed, and 3 329 385 DDDs were dispensed to 213 748 different patients; 50.3% of the inhabitants of Csongrád County (total population 424 615) took antibiotics. The average consumption of 1-, 2-, 3-, 4- and 5-time users was 7.5, 14.6, 21.0, 26.9 and 32.2 DDDs per user, respectively. Lorenz curves (including the new form of Lorenz curve) demonstrated the existence of disparities in antibiotic use. One percent of the users with the heaviest consumption were responsible for 6.9% of the total use and redeemed antibiotic prescriptions nine times or more during 2005. Disparities in antibiotic use were detected: half of the inhabitants were exposed to antibiotics, and among antibiotic users, the quantity of antibiotics that they redeemed displayed great variance, mainly due to differences in the prescribing frequency. Special attention should be paid to those with frequent antibiotic use (five times or more annually).

Are cultural dimensions relevant for explaining cross-national differences in antibiotic use in Europe?

BackgroundAntibiotics are widely-used medicines for which a more prudent use has been advocated to minimize development of resistance. There are considerable cross-national differences that can only partially be explained by epidemiological difference and variations in health care structure. The aim of this study was to explore whether cross-national differences in use of antibiotics (prescribed and non-prescribed) are associated with differences between national cultures as described in Hofstede's model of cultural dimensions (Power Distance, Individualism, Masculinity, Uncertainty Avoidance and Long-Term Orientation).MethodsCountry-level data of prescribed antibiotic use and self-medication with antibiotics were correlated to country-specific scores of cultural dimensions obtained from Hofstede. Data on use of antibiotics were provided by three European studies, based on different methods and/or countries: Self-medication with Antibiotics and Resistance in Europe (SAR), based on a survey in 2003 on reported use of antibiotics in 19 countries, the European Surveillance on Antimicrobial Consumption, based on distribution and reimbursement of antibiotics in ambulatory care (1997–2002), and the 2002 interview-based Eurobarometer study, asking whether respondents had taken antibiotics in the previous 12 months. These studies provided data on antibiotics use for 27 European countries in total, for which scores of cultural dimensions were also available. The SAR-study differentiated between prescribed antibiotics and self-medication with antibiotics.ResultsSignificant positive correlations were found for Power Distance Index with use of prescribed antibiotics in the three studies (rho between 0.59 and 0.62) and with self-medication (rho = 0.54) in the SAR study. Positive significant correlations were found for the Uncertainty Avoidance Index with the use of antibiotics as reported in two studies (rho between 0.57 and 0.59; for the SAR study the correlations were insignificant). Masculinity was not significantly correlated, except in one study after controlling for GDP (r = 0.81). For Individualism and Long-Term Orientation no significant correlations were found.ConclusionPower Distance is a cultural aspect associated with antibiotic use, suggesting that the culture-specific way people deal with authority is an important factor in explaining cross-national differences in antibiotic use. There are indications that Uncertainty Avoidance also plays a role but further research is needed to better understand the complex effect of cultural dimensions.

The Relationship Between Acute Mastoiditis and Antibiotic Use for Acute Otitis Media in Children—Invited Commentary

Objective: To determine the relationship between prior antibiotic use and the development of acute mastoiditis (AM) in children. Design: Retrospective review. Setting: Tertiary pediatric center. Patients: We identified 129 patients with AM who were admitted to our center between 1996 and 2005. Main Outcome Measure: Proportion of children who developed AM. Results: A total of only 67 patients (51.9%) had undergone any antimicrobial treatment prior to hospital admission. In 1996, 64% of patients with AM had received antibiotics for acute otitis media (AOM) prior to admission (n=7 of 11), but this percentage had steadily decreased to 27% by 2005 (n=4 of 15). The yearly number of cases of AM treated in our institution has remained stable over this period. A subperiosteal abscess was identified in 45 patients (34.9%), while the remainder (n=84) had postauricular inflammation only (65.1%). Nineteen patients with a subperiosteal abscess (42%) and 48 patients without a subperiosteal abscess (57%) had undergone prehospitalization antimicrobial therapy for suppurative AOM. There was no significant difference in antibiotic use between the numbers of patients with or without a subperiosteal abscess. Regarding the sensitivity of bacteria isolated from patients with a subperiosteal abscess, only 1 patient was infected with an organism that was not sensitive to the prehospitalization antibiotic prescribed. Conclusion: Use of antibiotics to treat suppurative AOM in children might not influence the subsequent development of AM.