Infeksi Luka Operasi (ILO) adalah salah satu komplikasi pembedahan yang paling umum terjadi di dunia, terutama di negara berkembang. Penggunaan antibiotik profilaksis sebelum operasi yang tepat dapat mengurangi ILO. Penelitian ini bertujuan untuk mengetahui profil penggunaan antibiotik dan kesesuaian penggunaan antibiotik pada seksio sesarea dengan peta kuman rumah sakit, Pedoman Penggunaan Antibiotik (PPAB) 2016, Formularium Rumah Sakit (RS), Formularium Nasional (Fornas), serta mengidentifikasi profil kuman penyebab ILO pada luka pasien. Metode penelitian menggunakan metode cohort prospective melalui penelusuran data terhadap rekam medik pasien yang menjalani tindakan operasi seksio sesarea di salah satu rumah sakit di Kabupaten Pasuruan periode MaretâMei 2017, yaitu data penggunaan antibiotik (jenis antibiotik, dosis, waktu pemberian) dan data peta kuman bulan JanuariâMaret 2017 terkait resistensi antibiotik. Analisis data berupa deskripsi profil penggunaan antibiotik, kesesuaian penggunaan antibiotik pada pasien seksio sesarea dengan pedoman, dan profil kuman penyebab ILO. Hasil yang diperoleh dari penelitian ini menunjukkan bahwa penggunaan antibiotik pada pasien seksio sesarea adalah ampisilin/sulbaktam 37%, sefuroksim 34%, seftriakson 24%, sefazolin 5%, metronidazol 1%, dan gentamisin 1%. Kesesuaian berdasarkan jenis antibiotik secara berturut-turut 5% berdasarkan PPAB, 100% berdasarkan Formularium RS dan 63% berdasarkan Fornas. Hal ini disebabkan oleh pola sensitivitas sefazolin berdasarkan peta kuman bulan JanuariâMaret 2017 semakin menurun. Kesesuaian berdasarkan dosis antibiotik 100% sesuai berdasarkan PPAB, Formularium RS dan Fornas. Kesesuaian berdasarkan dosis antibiotik dan waktu pemberian 92% sesuai berdasarkan PPAB. Kuman yang ditemukan pada luka pasien adalah bakteri Hafnia alvei.Kata kunci: Antibiotik profilaksis, Infeksi Luka Operasi, seksio sesarea Evaluation of Antibiotics Use and Bacteria Profile of Caesarean Section at Regional General Hospital, PasuruanAbstractSurgical Site Infection (SSI) is one of the most common surgical complications in the world, especially in developing countries. Proper use of prophylaxis antibiotics in appropriate intraoperative procedures may reduce SSI. The aim of this study was to determine the profile of antibiotic used and the adherence of antibiotic in caesarean section to Hospital Guideline 2016, Hospital Formulary, National Formulary, bacteria profile that cause SSI on the patientâs wound. Method used in this study was cohort prospective study design using record data of patients who underwent caesarean section surgery at Regional General Hospital of Pasuruan from MarchâMay 2017, i.e. antibiotics usage data (type, dosage and time of delivery) and microbial pattern data about antibiotic resistance from JanuaryâMarch 2017. Data analysis was description of the profile of antibiotic use, adherence use of antibiotic of caesarean section inpatients to the guidelines, and profile of bacteria that cause SSI. The results showed that the use of antibiotics in caesarean section patients was ampicillin/sulbactam 37%, cefuroxime 34%, ceftriaxone 24%, cefazolin 5%, metronidazole 1%, and gentamycin 1%. Adherence by type of antibiotics was 5% based on Hospital Guideline, 100% based on Hospital Formulary and 63% based on National Formulary. This was due to a decrease of cefazolin sensitivity pattern from 20% to 0% in JanuaryâMarch 2017 period. Adherence of antibiotic dosage was 100% based on Hospital Guideline, Hospital Formulary and National Formulary. Adherence of time of delivery 92% was based on Hospital Guideline. Bacteria found in the wounds of patients was Hafnia alvei.Keywords: Caesarean section, prophylaxis antibiotic, surgical site infection