on line editionOutpatient use of antibiotics in children in Slovenia Original Scientific article idZdrav Vestn | May – June 2017 | Volume 86 Microbiology and immunologyOriginal scientific article 1 Department of Infectious Diseases and Febrile Illnesses, University Medical Centre Ljubljana, Ljubljana 2 ESAC – Net (European Surveillance of Antibiotic Consumption – Net) 3 National Institute for Public Health, Ljubljana 4 Barsos MC, Ljubljana 5 TOMTIM d.o.o., Ljubljana Correspondence: tina Plankar Srovin, e: tinaplans@gmail.com Key words: antibiotics; children; outpatient use; decrease of consumption Cite as: Zdrav Vestn. 2017; 86:185–94. received: 14. 12. 2016 accepted: 8. 3. 2017 Outpatient use of antibiotics in children in Slovenia Milan Čižman,1,2 tina Plankar Srovin,1 Maja Sočan,3 aleš Korošec,2,3 Jerneja ahčan,4 tom Bajec2,5 Abstract Background: Antibiotics are among the most common drugs prescribed in outpatient settings. It is estimated that up to 50 % of antibiotic prescriptions are unnecessary or inappropriate. To plan the actions to optimize the use of antibiotics we conducted a national antibiotic consumption study in children aged 0–18 years in the period between 2003 and 2015. Methods: In this national retrospective research we analyzed outpatient antibiotic consumption us- ing the ATC/DDD classification. The data on antibiotic use were ?stratified ali analyzed by the pat- tern of prescription, age, gender and health region. Results: The total consumption of antibiotics during the study period decreased by 35 %, from 979 to 636 prescriptions per 1000 children/year (PTY),. The use of all antibiotic classes decreased (except for quinolones and nitrofuran derivatives) from 12.5 % to 81 %. Over the study period we found the highest consumption in children from 1 to 4 years (2184–1160 PTY). Amoxicillin was the most com- monly prescribed antibiotic in children aged 0 to 4 years, penicillin V among those aged 5 to 14 years, and co-amoxiclav among adolescents aged 15 to 19 years. In northeastern health regions of Slovenia much more antibiotics were prescribed than in other regions. In 2015, 65 % of prescriptions were pre- scribed by paediatricians and school medicine specialists, 16 % by physicians without specialization, 14 % by GP/family doctors and 5 % by other specialists. Conclusions: Despite the decrease in outpatient antibiotic use in children and adolescents in Slove- nia, the overall and especially broad-spectrum antibiotic consumption (amoxicillin with clavulanic acid, azithromycin and second/third generation cephalosporins) is still too high. It is necessary to strengthen the activities to reduce prescribing, particularly for acute (upper) respiratory tract infec- tions. Cite as: Zdrav Vestn. 2017; 86:185–94. 1. Introduction Antibiotics are the most common prescription drugs given to children with the highest incidence rates in pre- schools.(1,2) There are large variations in antibiotic prescribing among countries and also within them.(3,4) Prescribing antibiotics to children < 19 years varies between less than 300 and over 1500 pre- scriptions per 1000 children/year (PTY) (Table 1) (1,5,6). Antibiotic prescribing varies across paediatric practices in overall antibiotic prescribing rates and also in broad-spec- trum antibiotic prescribing (7). Primary on line edition Zdrav Vestn | May – June 2017 | Volume 86 MicrOBiOlOgy and iMMunOlOgy paediatric care in Europe is provided by paediatricians or family doctors and general practitioners or both, and varies among countries as well (8). Acute respi- ratory tract infections followed by skin/ cutaneous/mucosal and urinary tract infections are the most common condi- tions contributing to antibiotic prescrib- ing in the ambulatory paediatrics (9). To plan relevant activities that would limit ali reduce the overuse of antibiotics of the total as well as of particular classes of antibiotics we conducted a retrospec- tive national antibiotic consumption study in children aged 0–18 years in the period 2003–2015 characterising the pat- terns of antibiotic prescribing in relation to age, gender, health region, incidence of common infections and prescribers. 2. Methods Slovenia is a small central European country with 2,064,188 inhabitants ac- cording to the January 2016 census data  (10). It has 9 health regions with the populationsvarying from 71,218 to 656,831 (11). For the period 2003–2015 the data on outpatient antibiotic consump- tion were analysed using the Anatomical Therapeutic Chemical classification with defined daily doses (ATC/DDD); WHO 2016. The results were expressed in DDD per 1000 inhabitants per day (DID) and PTY  (12). The same definition of DDD was used for children and adults. The number of prescriptions of antibiotic for systemic use (JO1) and the incidence of infections were provided by the National Institute of Public Health (NIPH) of the Republic of Slovenia. The data on antibi- otic consumption were analyzed by age, gender and health region. The analysis was retrospective and included the en- tire country. We did not need an approv- al from the Medical Ethics Committee. 3. Results 3.1. Total antibiotic consumption and pattern of consumption The overall antibiotic consumption and its pattern during 2003–2015 ex- pressed as PTY are shown in Table 2. The consumption, expressed as PTY, decreased by 35 %; whenexpressed as DID it decreased by 26.5 % (from 17.92 to 13.18 DID). During the study period there was a steady decrease with small temporary increases in different years. The use of all antibiotic classes decreased, except for nitrofuran derivatives (nitrofurantoin), polymyxins and quinolones. The highest decrease was seen in cephalosporin of 3rd and 2nd generations (by about 80 %), followed by macrolides and co-trimoxa- zole (60 %) and antistaphylococcal peni- cillins (57 %). 3.2. Prescriptions according to gender In 2015 the amount of antibiotics pre- scribed to girls was by 5.6 % higher than Table 1: Outpatient antibiotic prescribing rates (number of prescriptions per 100 children per year) in some european countries. (1,5,6). Country Year Age (years) PTY Serbia 2013 0–18 1365 greece 2010–13 0–18 1100 italy (emilia-romagna) 2008 0–18 957 Slovenia 2015 0–18 636 germany 2008 0–18 561 united Kingdom 2008 0–18 555 denmark 2008 0–18 481 Sweden 2010 0–18 300 the netherlands 2008 0–18 294 Legend: PTY – number of prescriptions per 1000 children per year. on line editionOutpatient use of antibiotics in children in Slovenia Original Scientific article that prescribed to boys (654 vs. 619 PTY). Macrolides, lincosamides, cephalospo- rins, quinolones, TMP/SMX, other anti- biotics and aminoglycosides were more commonly prescribed to girls than boys. 3.3. Incidence of outpatient infections in children and adolescent (0–19 years) The incidence rate and trend of spe- cific diagnoses listed in the ICD-10 in the years 2005 and 2015 are shown in Table 3. Acute viral respiratory tract infections were the most common infections in both years, followed by upper respirato- ry tract infections (URTI), lower respira- tory tract infections, skin and soft tissue infections and urinary tract infections. 3.4. Total consumption and pattern of consumption by age groups Table 4 shows the prescriptions of an- tibiotics for systemic use per 1000 chil- dren/adolescents by age groups in 2015. In the study period the highest inci- dence rate of antibiotic use was observed among children 1 to 4 years (2184–1160), followed by children 5 to 9 years (1203– 723), then in children < 1 year (482–456 ), followed by children 15 to 19 years (566– 398), and 10 to 14 years (602–350). Amoxicillin was the most commonly prescribed antibiotic in children aged 0–4 years, penicillin V among those aged 5 to 14 years and co-amoxiclav among adolescents aged 15 to 19 years (Table 4). Table 2: number of prescriptions per 1000 children per year in 2003 and 2015 in Slovenia. ATC code ATC name 2003 2015 2003 vs. 2015 J01 a tetracyclineS 5 4 - 20 J01 c Beta-lactaM antiBacterialS, PenicillinS 657 515 - 21.7 ca ce cf cr Penicillin with extended spectrum Beta-lactamase sensitive penicillins Beta-lactamase resistant penicillins combination of penicillins and beta- lactamase inhibitors 270 216 7 164 222 167 3 123 -17.8–22.7– 57–25 J01 d dB dc dd OtHer Beta-lactaM antiBacterialS first-generation cephalosporin Second-generation cephalosporin third-generation cephalosporin 86 2 79 5 17 1 15 1 - 80.2–50– 81–80 J01 e SulPHOnaMid and triMetHOPriM 58 23 - 60.3 J01 f fa ff MacrOlideS and lincOSaMideS Macrolides lincosamides 170 166 4.0 71 67 3.5 - 58.3–59.6– 12.5 J01 M Ma QuinOlOne antiBacterialS fluoroquinolones 3 3.22 3 3.27 +1.5 J01 X XB Xe OtHer antiBacterialS Polymyxins nitrofuran derivatives - - 3 0 3 Total 979 636 - 35 Legend: ATC, J01 – antibacterials for systemic use on line edition Zdrav Vestn | May – June 2017 | Volume 86 MicrOBiOlOgy and iMMunOlOgy 3.5. Prescriptions by regions Regional differences in incidence rates of treatment episodes within age group 0–18 years were identified. In the year 2015 there was an 83 % difference between the regions with the lowest and the highest total antibiotic consumption. The highest consumption was observed in the health region of Murska Sobota, in the northeast of Slovenia, and the lowest in the region of Nova Gorica, the westernmost part of the country (925 vs. 506 PTY). The median consumption was 688, and the average consumption 668 PTY. 3.6. Prescriptions by speciality The differences in antibiotic prescrip- tions by different specialists were iden- tified (Table 5). Amoxicillin was pre- scribed most commonly by all specialists followed by penicillin. It is a matter of concern that physicians without special- ization prescribed substantially more frequently co-amoxiclav. Paediatricians prescribed cephalosporins more often than other specialists did. 4. Discussion In Slovenia, the total number of pre- scriptions for systemic use in children and in adolescents decreased by 35 %, and the consumption of different classes of antibiotics except for quinolones and nitrofuran derivatives from 12.5 %to 81 % during the period from 2003 to 2015 (Table 2). The decrease in the total an- tibiotic consumption is favourable but too small. When we benchmark the data with other countries we can see that in some countries (The Netherlands, Swe- den), prescribe substantially fewer anti- biotics (300 PTY vs. 636) are prescribed (Table 1). In both cited countries prima- ry paediatric care is provided by family Table 3: causes of children and adolescents’ (0–19 years) first outpatient visit in Slovenia in the years 2005 and 2015. Diagnosis ICD-10* code Incidence rate/1000 in 2005 Incidence rate/1000 in 2015 acute viral respiratory infection J00, J04, B34.9, J06, J21, J22 628.5 587.2 nonspecified acute pharyngitis J02.9, J03.9 266.1 165.9 acute otitis media (suppurative) H66, H65 190.2 (24) 196.4 (32.7) acute bronchitis/bronchiolitis J05, J20 74.4 83.6 Streptococcal pharyngitis J0.2, J0.3 23.5 37.2 Suppurative skin or/and subcutaneous infection l01, l02, l03, l08 31.6 34.5 Bacterial pneumonia J13, J14, J15, J16, J17, J18 20.6 28.3 urinary tract infection n10, n30 12.1 13.6 acute sinusitis J01 14.1 8.9 * ICD-10–International classification of diseases, 10th revision. on line editionOutpatient use of antibiotics in children in Slovenia Original Scientific article doctors and general practitioners who have substantially shorter education in paediatrics, but they prescribe only half the amount of paediatric prescriptions. In the countries with lower antibiotic consumption, primary care physicians treat the most common infections, es- pecially respiratory tract infections, less commonly. Rather than immediately prescribe an antibiotic, the physician should spend more time explaining to patients why an antibiotic is not needed and about the side effects including the development of resistance (2,4,6). Inter- ventions to improve antibiotic prescrib- ing in Slovenia have been reported re- cently (13). A broad-spectrum penicillin co- amoxiclav is prescribed too often in all age groups, especially in adolescents. Co- amoxiclav is an alternative drug for the treatment of acute otitis media (OMA), acute bacterial rhinosinusitis and pneu- monia, if amoxicillin monotherapy is not appropriate (14). We should remember to think critically before prescribing it and use amoxicillin instead, unless we are specifically concerned about the infec- tion with amoxicillin-resistant bacteria (Haemophilus influenzae, Moraxella ca- tarrhalis). It is important to avoid exces- sive or inappropriate use of co-amoxiclav in emergency departments and primary care settings which has been widely rec- ognised (14). The reasons for curbing co- amoxiclav use are manifold, but include the long-term impact on antimicrobial resistance rates in the community, as well as possible patient-specific adverse effects (antibiotic-associated diarrhoea, including Clostridium difficile). A recent analysis has shown a positive relation- ship between the use of co-amoxiclav in the community and hospital care and the incidence of extended spec- trum beta-lactamase (ESBL)-producing bacteria (15). The resistance mechanism of pneumococcus against penicillin is not through beta-lactamase produc- tion, therefore the therapy of infections caused by penicillin-resistant pneumo- cocci with co-amoxiclav is not appropri- ate. Instead, we should use higher doses of penicillin. Azithromycin is now rec- ognized as a major driver of macrolide resistance due to its very long half-life and should not be used for the therapy of Streptococcus pyogenes infections; the use of macrolides with short half-life is recommended. In a 5-month retrospec- tive study carried out In 2008/2009 Ahčan, who spent many years working at the department of paediatric infec- tious diseases, showed that penicillin V was the most commonly prescribed antibiotic (55.2 %), followed by amoxi- cillin (33.1 %), co-amoxiclav (3.2 %), co-trimoxazole (3.2 %), macrolides (2.7 %) and antistaphylococcal antibiot- ics (2.7 %) (16). Compared to other pri- mary care paediatricians she prescribed substantially lower percentages of co- amoxiclav (3.2 % vs. 19.5 %), macrolides (2.7 % vs. 6.4 %), and higher percentage of narrow spectrum antibiotics (Table 5). The goal in Sweden is that at least 80 % of antibiotics commonly used to treat re- spiratory tract infections in children 0–6 years of age should be penicillin V. In 2015 the proportion of penicillin V was 69 % at the national level (4). The highest incidence rate of antibi- otic prescriptions was observed among children aged 1 to 4 years at 1160 per 1000 children in 2015. The most com- mon cause of the high number of pre- scriptions are common respiratory tract infections in children attending day-care centres. Based on the data of the nation- al Statistical Office of Slovenia, 78 % of children aged 1–5 years are included in day-care centres. Every year the number of included children has increased (58 % of children included in 2006)  (17). The on line edition Zdrav Vestn | May – June 2017 | Volume 86 MicrOBiOlOgy and iMMunOlOgy number of prescribed antibiotics in Slo- venia is too high in this age group. All countries with lower consumption of antibiotics than Slovenia have higher percentages of children included in day- care centres. Also the size of children groups is comparable with ours  (18). Sweden has decreased the antibiotic con- sumption in children aged 0–6 years by 51 % since 2000, from 746 to 367 PTY (4). Also the counties with lower antibiotic consumption (200 PTY) continued to decrease the consumption significantly during 2014, which also suggests antibi- otic overuse in other countries. A recent cohort study in the Stockholm County has shown no increase in the number of complications in patients with OMA, tonsillitis and sinusitis as a consequence of a 33 % decrease in antibiotic use (19). A too high prescription incidence rate is also being observed in the age group less than one year of age. Slovenia has a one-year maternity leave and over 50 % of families have only one child  (10). Respiratory tract infections are most commonly caused by viruses in this age group and antibiotics are likely pre- scribed unnecessarily. It is important to diminish the exposure of infants to in- dividuals with symptomatic respiratory tract infections. Table 4: number of prescriptions per 1000 children (0–19 years) in 2015, by age groups and expressed in drug utilization 90 %. Antibiotic Age 0–1 year (%) 1–4 years (%) 5–9 years (%) 10–14 years (%) 15–19 years (%) amoxicillin 261 (57.2) 518 (44.6) 215 (29.6) 91 (26.0) 73 (19.6) Penicillin V 26 (5.7) 250 (21,) 262 (36.2) 104 (29.7) 74 (19.9) co-amoxiclav 88 (19.2) 216 (18.6) 131 (18.0) 72 (20.6) 86 (23.0) azithromycin Miocamycin 21 (4.6) 23 (2.0) 57 (7.9) 38 (10.7) 44 (11.8) cefuroxsime 15 (3.2) 20 (1.7) co-trimoxazole 15 (3.2) 27 (2.3) 14 (4.0) 34 (9.2) doxycycline 11 (3.0) ciprofloxacin 9 (2.4) clindamycin 9 (2.4) Number of prescriptions in DU 90 % 426 (93.4 %) 1054 (90.8 %) 665 (91.9 %) 319 (91.1 %) 340 (91.6 %) Total antibiotic prescriptions 456 1160 723 350 371 Legend: DU – drug utilization. on line editionOutpatient use of antibiotics in children in Slovenia Original Scientific article Regional variations in antibiotic use in children and adults are apparent in each analyzed year. In health regions in northeastern Slovenia substantially more antibiotics are prescribed than in other regions. A retrospective study on the consumption of antibiotics for sys- temic use in children aged 0–14 years during the period 2006–2009 showed that in the regions with higher antibiotic consumption URTI and bronchitis were more frequently diagnosed. In 2006 OMA and urinary tract infections were diagnosed more commonly as well. The majority of these infections is caused by viruses, are self-limited but commonly treated with antibiotics. The region with the highest antibiotic consumption has more physician visits (5 visits per child per year) than the region with the lowest consumption (3 visits), which indicates the importance of parents’ education and easy access to physicians. Primary care physicians are the most important source of information, they should edu- cate parents when to visit the physician. All over the world the differences in the frequency of prescriptions among individual physicians are observed (20). Gerber and co-workers have found a twofold difference in the total and a four- fold difference in prescriptions of broad spectrum antibiotics (7). Physicians who unusually prescribe high amounts of antibiotics and/or broad-spectrum an- tibiotics need additional education. If education is not successful other inter- ventions should be introduced to reduce inappropriate prescriptions. Electronic prescriptions enable a better control of the total and the pattern of prescriptions which has been recently reported  (12). Benchmarking with other prescribers and introduction of accountable justifi- cation has decreased the consumption of antibiotics for acute respiratory tract infections (21). It would be useful to up- grade electronic prescriptions regard- ing the total (for example a warning at 80 % of the total average prescriptions) and the prescribing pattern. Recent data from the NIPH for 2015 show that 65 % of prescriptions for children and ado- lescents were written by paediatricians and school medicine specialists, 16 % by physicians in training, 14 % by GP/fam- ily doctors and 5 % by other specialists. These data show that the education of professionals should include all these specialists. We have prepared the guide- lines for antibiotic therapy of common syndromes, followed by many presenta- tions at professional meetings, yet physi- cians seem to be reluctant to adhere to the recommendations (22). Antibiotic prescription is always con- sidered appropriate for bacterial pneu- monia, urinary tract infections and Table 5: Structure of antibiotic prescribing (%) by speciality to children from 0 to 18 years in Slovenia in 2015. Antibiotic/ Prescriber Amoxicillin Penicillin Co- amoxiclav Macrolides Cephalosporins Co- trimoxazole Total PTY Paediatrician 36.8 29.3 19.5 6.4 2.8 2.6 348 School doctor 31.9 30.4 18.4 9.9 1.4 2.8 65 general practitioner 43.5 22.7 17.8 6.9 2.0 3.0 51 family doctor 42.0 27.0 16.2 5.4 1.3 2.7 37 Without specialty 31.9 23.3 26.2 5.8 1.4 3.4 100 Legend: number of prescriptions per 1000 children per year on line edition Zdrav Vestn | May – June 2017 | Volume 86 MicrOBiOlOgy and iMMunOlOgy streptococcal throat infections. The inci- dence of these infections is relatively low. More often the infections where recom- mendations allow the use of antibiotics in certain cases, such as acute suppura- tive otitis media, sinusitis (acute bacte- rial sinusitis), skin and soft tissue infec- tions and bacterial lymphadenitis are being diagnosed. On the basis of many International guidelines, antibiotics are not indicated in nasopharyngitis, un- specific URTI, bronchitis, bronchiolitis, viral pneumonia, and non-suppurative acute otitis media. These infections are diagnosed the most frequently  (21). AOM is diagnosed substantially more commonly in Slovenia than in the Neth- erlands where the incidence was 75/1000 inhabitants/year in patients < 18 years of age in 2010-2012 (23). Also the incidence of AOM episodes in five East European countries in children below 6 years of age in 2011/2012 was the highest in Slo- venia (455.4/1000 persons per year), and the antibiotic prescription propor- tion was the highest in Slovenia as well (92.8 %) (24). These data show that AOM is overdiagnosed and overtreated with antibiotics. We urgently need additional education of primary care physicians on the correct diagnosis and appropri- ate therapy of AOM in Slovenia (25-27). Because physicians in training rarely see patients with AOM in hospitals, training in a simulation centre should be orga- nized. If we treat 10 % of patients with URTI (prolonged course of suppurative rhinitis > 10 days), 30 % of AOM (sup- purative AOM and part of non-suppu- rative, in infants < 6 months, bilateral in children < 2 years of age, after eardrum perforation, and/or new development of otorhoea, severe course or in children with high risk for severe course), 20 % with acute bronchitis (suspected pneu- monia, children with underlying dis- eases at high risk of complications) and sinusitis (acute bacterial rhinosinusitis) and all cases of bacterial skin and soft tissue infections, bacterial pneumonia, UTI, streptococcal throat infections and other rare bacterial infections with an- tibiotics, the estimated use of antibiot- ics would be around 250 prescriptions /1000 inhabitants per year (28). The limitation of the study is that we were not able to obtain the percentages of antibiotics prescribed for individual diagnosis and the percentages prescribed in working hours and in emergency de- partments. Regardless of the place of pre- scriptions it is important that antibiotics are prescribed only if they are needed, this is in documented or suspected bac- terial infections, and where the benefit of antibiotic therapy is greater than the therapy without antibiotics. When we prescribe antibiotics we should always, besides the benefit for the patient, take into account the ?future ali long-term? side effects and collateral damage of antibiotics. In Slovenia, we monitor the side effects of drugs includ- ing antimicrobials poorly. A recent Ca- nadian study has shown that of all drugs, the side effects of antimicrobials are the most common cause for visiting an emergency department  (29). When we prescribe antibiotics we should always bear in mind potential long-term side effects of antibiotics. Over the last few years many studies have been published confirming the correlation between an- tibiotic usage in early childhood and various autoimmune diseases (juvenile rheumatoid arthritis, chronic inflamma- tory bowel disease), obesity, which can present the tip of the iceberg from all long-term side effects. The selection pressure of antibiot- ics on normal flora and pathogens, and secretion in the environment are well known but not sufficiently taken into account. In Slovenia, the levels of pneu- on line editionOutpatient use of antibiotics in children in Slovenia Original Scientific article mococcal resistance to penicillin and macrolides are higher in children be- cause of a higher use of antibiotics in children than in adults. Higher regional consumption of penicillins is associated with higher resistance of Streptococcus pneumoniae to penicillin (3). 5. 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