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"The pathogenesis of inflammatory bowel disease (IBD) is not yet fully understood A genetic predisposition, some environmental factors and microbial flora of the grit are the key factors. The presence of bacteria in the intestinal lumen is a prerequisite for the development of IBD. In animal models, mice incapable of expressing IL, or IL invariably develop a colitis- or Crohn-like inflammation. No inflammation occurs if they grow up in a pathogen free environment or if they are fed with Lactobacillus sp when exposed to environmental bacteria. Thus, the absence of liminal bacteria or a different make-up there of prevents the development of inflammatory bowel disease in this model. Patients with IBD have been found to have a decreased stool excretion Lactobacillus andlor Bifidobacteria. Furthermore, an increased number of bacteria adherents to the mucosa and within the epithelium has been demonstrated in quantitative studies. It appears that these bacteria trigger a strong abnormal mucosal immunological response, leading to intestinal epithelial cell injury mediated by activated T-cells, mononuclear cells and macrophages. If this response can not be down regulated by regulatory T-cells, mononuclear inflammatory cytokines are activated by stimulation of the intracellular transcription factor NF-kB. Recently it was shown that bacterial lipopolysaccharides can activate NF-kB by binding to two specific receptors on the cell membrane (Toll-like receptors [TLR's]) or intracellular receptors (NOD's). New insights of the role of bacteria in IBD became available by identifying susceptibility genes for IBD. Several IBD susceptibility loci were recently identified. The IBD-l locus on chromosome 16 shows positive evidence for linkage in Crohn's disease and IBD-2 locus on chromosome l2 for ulcerative colitis. The evidence for' an association with Crohn's disease at the IBD-I locus have been shown to be attributed to mutations in the CARDI5/NOD2 gene. This gene is exressed in peripheral blood monocytes and in intestinal epithelial cells and serves as a key factor of innate mucosal response to luminal bacteria as an antibacterial factor. The intact intercellular NOD2 protein binds LPS and activates NF-kB. This activation of the NF-kB signalling pathway in response to bacterial components plays a protective role in the mucosal epithelial cells for the host against inviting pathogens and an increased apoptosis of infected cells. There is evidence, that the defective NOD2 protein variants increase the susceptibility to pathogen invasion and a decrease in cellular apoptosis. NF-kB plays a dual role in IBD. On the mucosal epithelial cells, bacterial components bind on NOD2 proteins and protect bacterial invasion. If this barrier mechanism is not intact, the bacterial invasion stimulates via TLR- and NOD2 receptors in immune-active cells (macrophages, T-cells and monocytes) NF-kB and triggers an aberrant inflammatory response leading to tissue damage. These new insights in the pathogenesis in IBD have led to new treatment possibilities including pre- and probiotics. These therapies are aimed at directly modulating the host immune system to suppress intestinal inflammation. This has prompted considerable interest in manipulating the enteric microenvironment as a novel therapeutic strategy Several clinical studies showed promising results rising pre- and probiotics in patients with ulcerative colitis, pouchitis and Crohn's disease. The introduction of genetically engineered probiotic organism to produce and deliver anti-inflammatory cytokines or other biological relevant molecules to the mucosa offers further new potential for the treatment of IBD."

"Bacterial oxidation technology is a competitive alternative for treating refractory gold. The utilization of bacterial oxidation in the mining industry is relatively recent and the introduction of microbiology and biochemistry to this area is not widely understood by mining companies. Many misconceptions and misunderstandings have resulted from insufficient information. This paper describes the practical aspects of bio-oxidation technology related to the biology and physiology of bacteria in associate with the role and behavior of bacteria in bacterial oxidation."

"ABSTRAKLatar belakang:Sepsis adalah infeksi bakteri dalam darah yang sangat serius (SBI) karena akan mengancam jiwa. Masih tingginya angka kematian balita karena infeksi berat dan keterbatasan fasilitas di rumah sakit daerah untuk mendiagnosis terjadinya SBI,maka penilaian secara klinis dengan menggunakan standar yang valid dalam menegakkan diagnosis SBI sangat diperlukan.Salah satu metode yang dapat digunakan untuk menilai apakah anak diprediksi menderita SBI adalah dengan skala Acute illness observation scale (AIOS). Peneliti terdahulu menemukan skalaAIOS >8 mempunyai titik potong paling baik, tapi validasi keakuratannya perlu diteliti lebih lanjut. Tujuan:Melakukan validasi menggunakan skala AIOS>8 untuk mendeteksi terjadinya infeksi bakteri serius pada usia 3-36 bulan yang datang dengan demam, dan membandingkannya dengan diagnosis akhir dari dokter spesialis anak.Metode :Uji diagnostik potong lintang dan validasi skor menggunakan tabel dua kali dua, untuk mendapatkan nilai sensitifitas, spesifisitas, nilai duga positif, nilai duga negatif dan rasio kemungkinan positif dan negatif. Hasil penelitian :Dari 143 sampel, subjek penderita SBI sebesar 44(30,77%), proporsi anak laki-laki sama dengan perempuan. dan usia terbanyak adalah 3-12 bulan yaitu 27(61,4%) subjek. Subjek penderita SBI dengan skoring AIOS > 8 sebanyak 41( (93,2%%). Penyakit SBI terbanyak adalah pnemonia 21(47,7%) subjek, diikuti ISK (13,6%), diare bakterial, sepsis dan ensefalitis masing masing (9,1%), selulitis (6,8%) dan meningitis (4,6%) dan penyakit bukan SBI terbanyak adalah ISPA 36(36,4%) subjek. Sensitifitas skor AIOS 95,5% (IK 95%; 84,5-99,4%), spesifisitas 29,3% (IK 95%; 20,6-39,3%), nilai duga positif 37,5% (IK 95%; 34,3-40,9%), nilai duga negatif 93,6% (IK 95%; 78,4-98,3%), rasio kemungkinan positif 1,4 (IK95%; 1,2-1,6), rasio kemungkinan negatif 0,2 (IK95%; 0,04-0,6). AUC(area under receiver operating characteristic curve 0,655 dengan p 0,002 dan IK 95% 0,6-0,8) dapat mendiskriminasi pasien-pasien yang dicurigai SBI dengan baik. Kesimpulan : Penggunaan skala AIOS>8 sangat sensitif untuk mendeteksi terjadinya infeksi bakteri serius pada usia 3-36 bulan.

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ABSTRACTBack ground. Sepsis is a very serious bacterial infection in the blood (SBI) because it will be life-threatening. The high rates of under-five mortality due to severe infections and limited facilities in local hospitals, a clinical assessment must be use a valid standard to diagnose SBI. One method that can be used to assess whether a child is predicted to have SBI is the scale of the Acute illness observation scale (AIOS). The previous researcher found that the scale of AIOS > 8 has the best cutoff point, but the validation of accuracy needs to be further investigated.. Aim: Validate using AIOS scale> 8 to detect the occurrence of serious bacterial infections at the age of 3-36 months who come with fever, and compare it with the final diagnosis of pediatrician.Method. The cross-sectional diagnostic test and the scoring validation use the two-by-two tables, to obtain sensitivity, specificity, positive predictor, negative predictor and positive and negative probability ratios. Result. Of the 143 samples, the subject of SBI was 44 (30.77%), the proportion of boys was the same as for women. And the most ages were 3-12 months ie 27 (61.4%) subjects. Subjects of SBI patients with AIOS scores > 8 were 41 ((93.2 %%) .The highest SBI disease was pneumonia 21 (47.7%) subjects, followed by UTI (13.6%), bacterial diarrhea, sepsis and encephalitis respectively (9,1%), cellulitis (6.8%) and meningitis (4.6%) and non-SBI disease were mostly ARI 36 (36.4%) subjects, AIOS score sensitivity 95.5% (95% IK; 84,5-99,4%), specificity 29,3% (95% IK, 20,6-39,3%), positive predictive value 37,5% (95% IK, 34,3-40,9% ), A negative predictive value of 93.6% (95% IK, 78.4-98.3%), a positive likelihood ratio of 1.4 (IK95%, 1.2-1.6), a negative likelihood ratio of 0.2 ( IK95%; 0.04-0.6). AUC (area under receiver operating characteristic curve 0.655 with p 0.002 and 95% IK 0.6-0.8) can discriminate well-suspected SBI patients. Conclusion. The use of AIOS scale> 8 is very sensitive to detect serious bacterial infections at 3-36 months of age in area."

"This book offers interesting insight into initial works carried out to demonstrate the potential use of bacterial pigment as colorant for various applications."

"Latar Belakang: Baduy merupakan suku yang masih melestarikan budayanya tersendiri tanpa dipengaruhi oleh faktor luar yang menyebabkan variasi genetik dan dapat mempengaruhi komposisi mikroba dalam rongga mulut. Variasi mikroba dan status kebersihan rongga mulut berhubungan dengan pertumbuhan biofilm yang dipengaruhi oleh hasil metabolit sejumlah mikroorganisme, seperti protein dan nitrat. Protein berperan penting dalam perlekatan mikroba dan mendukung adhesi intraselular serta komunikasi antar mikroba sehingga meningkatkan pembentukan biofilm. Keberadaan NO dalam rongga mulut dapat mengurangi tingkat c-di-GMP yang menyebabkan terjadinya dispersi pada biofilm sehingga dapat memecah matriks biofilm. Tujuan: Mengamati pengaruh spent medium isolat bakteri usap lidah individu Baduy terhadap viabilitas sel dan massa biofilm in vitro bakteri usap lidah individu Non-Baduy dalam kondisi aerob. Metode: Pemeriksaan konsentrasi protein dari spent medium isolat bakteri usap lidah Baduy dilakukan dengan uji Bradford, uji Griess untuk menetapkan konsentrasi nitrat, uji Crystal Violet untuk menetapkan nilai optical density yang merepresentasikan massa biofilm, dan uji Total Plate Count (TPC) yang menentukan viabilitas sel. Masing-masing perlakuan dibedakan berdasarkan konsentrasi protein dan nitrat pada spent medium 5% dan 10% dengan waktu inkubasi selama 24 jam dalam kondisi aerob. Selanjutnya data diolah secara statistik menggunakan uji komparasi One-Way ANOVA, Independent T-test, dan Mann-Whitney U. Hasil: Uji statistik menunjukkan terdapat perbedaan bermakna pada perbandingan viabilitas sel biofilm in vitro bakteri usap lidah individu Non-Baduy yang diintervensi oleh spent medium isolat bakteri usap lidah individu Baduy berdasarkan konsentrasi protein dan nitrat sebesar 5% dan 10%, massa biofilm in vitro bakteri usap lidah individu Non-Baduy yang diintervensi spent medium dengan konsentrasi nitrat 5% dan 10%. Tidak terdapat perbedaan bermakna pada massa biofilm in vitro bakteri usap lidah individu Non-Baduy dengan perbedaan konsentrasi protein 5% dan 10%, serta viabilitas sel dan massa biofilm yang diintervensi oleh spent medium isolat bakteri usap lidah individu Baduy yang mengandung KNO3 dan tanpa KNO3. Kesimpulan: Peningkatan konsentrasi protein pada spent medium isolat bakteri usap lidah individu Baduy sebagai bahan uji meningkatkan massa biofilm in vitro bakteri usap lidah individu Non-Baduy. Namun, peningkatan konsentrasi nitrat pada spent medium isolat bakteri usap lidah Baduy dapat menurunkan viabilitas sel pada biofilm in vitro bakteri usap lidah individu Non-Baduy. Selain itu, kandungan KNO3 pada spent medium juga meningkatkan viabilitas sel dan massa biofilm in vitro Non-Baduy. Kata kunci: Suku Baduy, spent medium isolat bakteri usap lidah, konsentrasi protein, konsentrasi nitrat, viabilitas sel, dan massa biofilm.

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Background: Baduy is a tribe that still preserves its own culture without being influenced by external factors that cause genetic variations and can influence the composition of microbes in the oral cavity. Microbial variations and oral hygiene status are related to biofilm growth which is influenced by the metabolites of several microorganisms, such as proteins and nitrates. Proteins play an important role in microbial attachment and support intracellular adhesion and communication between the microorganisms, thereby increasing biofilm formation. The presence of NO in the oral cavity can reduce the level of c-di-GMP which causes dispersion in the biofilm, so that it can break down the biofilm matrix. Objective: To determine the effect of spent medium of bacterial isolates of tongue swab from the Baduy on cell viability and biofilm mass of the Non-Baduy's tongue swab bacterial under aerobic conditions. Methods: Protein concentration of spent medium of bacterial isolates from tongue swabs of the Baduy was examined using the Bradford test, the Griess test to determine nitrate concentration, the Crystal Violet test to determine the optical density value which represents the biofilm mass of the Non-Baduy's tongue swab bacterial, and the Total Plate Count (TPC) test which determines cell viability of in vitro biofilm of the Non-Baduy's tongue swab bacterial. Each treatment was differentiated based on the concentration of protein and nitrate at 5% and 10% of spent medium of bacterial isolates of tongue swab from the Baduy with an incubation time of 24 hours under aerobic conditions. Afterwards, the data was collected and tested statistically using One-Way ANOVA, Independent T-test, and Mann-Whitney U test. Results: There were statistically significant differences in the comparison of cell viability of Non-Baduy tongue biofilms that were intervened by spent medium based on protein concentrations of 5% and 10% and nitrates of 5% and 10%, the mass of in vitro biofilm of the Non-Baduy's tongue swab bacterial that were intervened by spent medium of bacterial isolates of tongue swab from the Baduy based on nitrate concentrations of 5% and 10%. There were no statistically significant differences in comparison of the mass of in vitro biofilm of the Non-Baduy's tongue swab bacterial with 5% and 10% protein concentration of spent medium of bacterial isolates from tongue swabs of the Baduy, as well as cell viability and biofilm mass that were intervened by spent medium of containing KNO3 and without KNO3. Conclusion: Increasing the protein concentration in spent medium of bacterial isolate of tongue swabs from the Baduy as a test material increases the mass of in vitro biofilm of bacterial tongue swabs from the Non-Baduy. However, increasing the nitrate concentration in spent medium of bacterial isolate of tongue swab from the Baduy can reduce cell viability in the in vitro biofilm of bacterial tongue swabs from the Non-Baduy. In addition, the KNO3 content in the spent medium of bacterial isolate of tongue swab from the Baduy also increased the cell viability and tongue biofilm mass of in vitro biofilm of bacterial tongue swabs from the Non-Baduy. Key words: Baduy, spent medium of bacterial isolate of tongue swab, protein concentration, nitrate concentration, cell viability, and biofilm mass.

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"Kuinolon adalah antibiotik berspektrum luas, yang digunakan untuk mengobati infeksi oleh bakteri gram positif ataupun negatif. Pemilihan antibiotik yang tepat sangat menentukan keberhasilan pengobatan infeksi bakteri. Kepekaan bakteri senantiasa berubah pada waktu dan tempat yang berbeda, sehingga perlu adanya analisis rutin mengenai pola sensitifitas bakteri terhadap antibiotik. Pola sensitifitas ini sangat diperlukan sebagai dasar pemilihan antibiotik untuk terapi empirik pada kasus infeksi. Penelitian ini menggunakan data sekunder yang diperoleh dari hasil uji resistensi bakteri terhadap berbagai antibiotika di Laboratorium Mikrobiologi Klinik Fakultas Kedokteran Universitas Indonesia tahun 2001-2006, yang memperoleh bahan pemeriksaan klinik dari berbagai rumah sakit terutama RSCM dan juga dari praktik pribadi di Jakarta. Data penelitian ini menggunakan bakteri yang diisolasi dari darah yang diuji sensitivitasnya terhadap siprofloksasin, gatifloksasin, moksifloksasin, ofloksasin, dan levofloksasin. Data diolah dengan software WHONET 5.4. Metode statistik yang digunakan adalah metode cross-sectional deskriptif. Dari 791 isolat yang berasal dari 770 pasien dengan bakterimia positif, ditemukan bakteri gram negatif sebanyak 525 isolat dan bakteri gram positif 266 isolat. Bakteri gram negatif terbanyak adalah Acinetobacter anitratus, Salmonella Typhi, Pseudomonas aeruginosa, dan Klebsiella pneumoniae. Sedangkan bakteri gram positif terbanyak adalah Staphylococcus epidermidis dan Staphylococcus aureus. Sensitivitas bakteri-bakteri tersebut terhadap siprofloksasin, gatifloksasin, moksifloksasin, ofloksasin, dan levofloksasin, umumnya masih sangat baik. Fluorokuinolon dapat dijadikan pilihan dalam terapi empiris pada penyakit infeksi oleh bakteri hingga hasil kultur dan uji resistensi diperoleh.

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Quinolones are wide spectrum anitmicrobial agents used to treat the infection by both of the gram-positive bacteria and gram-negative bacteria. The exact selection of antibiotic is critical for the success of medical treatment for the bacterial infections. The sensitivity of the bacteria always changes at the different time and place, results the need of routine analysis about the pattern of bacterial sensitivity against antibiotics. Understanding the pattern of bacterial sensitivity can help in choosing antibiotic as empirical therapy. The data that was taken is the secondary data received from results of the test of bacterial resistance against various antibiotics from the year 2001-2006 that was sent to the Laboratory of Clinical Microbiology, Faculty of Medicine of University of Indonesia. The data was processed with software WHONET 5,4. The statistical method used was crosssectional descriptive method. From 791 isolat that came from 770 patients with bacteremia, the gram-negative bacteria are 525 isolat and the gram-positive bacteria are 266 isolat. The most gram-negative bacteria isolated are Acinetobacter anitratus, Salmonella Typhi, Pseudomonas aeruginosa, and Klebsiella pneumoniae. Whereas the most gram-positive bacteria are Staphylococcus epidermidis and Staphylococcus aureus. The sensitivity of these bacteria against ciprofloxacin, gatifloxacin, moxifloxacin, ofloxacin, and levofloxacin, generally are still very well. Fluoroquinolone can be a choice in empirical therapy in the infection by the bacteria untill the results of culture and the test resistance have been received."

"Latar Belakang: Kondisi dekompensata tanpa infeksi bakteri pada pasien sirosis hati dapat meningkatkan kadar prokalsitonin (PCT). Belum ada penelitian yang secara khusus membandingkan kadar PCT berdasarkan kompensasi hati dan ada tidaknya infeksi bakteri. Tujuan: Mengetahui peran PCT dalam membantu menegakkan diagnosis infeksi bakteri pada pasien sirosis hati. Metode: Studi potong lintang dilakukan terhadap pasien sirosis hati yang berobat jalan dan dirawat inap di RSUPNCM Jakarta dari April sampai Mei 2016. Pada pasien dilakukan pemeriksaan PCT dan penentuan ada tidaknya infeksi bakteri berdasarkan pemeriksaan standar sesuai jenis infeksi yang dicurigai. Dilakukan analisis untuk mengetahui perbedaan rerata kadar PCT pada pasien sirosis hati yang tidak terinfeksi bakteri dan yang terinfeksi bakteri, serta pencarian nilai titik potong PCT untuk mendiagnosis infeksi bakteri pada sirosis hati dekompensata dengan menggunakan receiver operating curve (ROC). Hasil: Didapatkan 55 pasien sirosis hati, pria sebanyak 65,5%, dengan rerata usia 55,34±1,308 tahun. Sebanyak 38 (69,1%) pasien sirosis hati dekompensata yang 22 (57,9%) diantaranya tidak terinfeksi bakteri dan 16 (42,1%) terinfeksi bakteri. Pada pasien yang tidak terinfeksi bakteri terdapat perbedaan rerata kadar PCT yang bermakna antara pasien dekompensata (0,738ng/mL±1,185) dibandingkan dengan 17 pasien kompensata (0,065ng/mL±0,022). Rerata kadar PCT pasien dekompensata yang terinfeksi bakteri (3,607ng/mL±0,643) lebih tinggi bermakna dibandingkan dengan yang tidak terinfeksi bakteri(0,738ng/mL±1,185). Dari kurva ROC, kadar PCT pada pasien sirosis hati dekompensata didapatkan area under curve (AUC) 0,933 (IK 0,853-1,014) untuk diagnosis infeksi bakteri. Nilai titik potong kadar PCT untuk mendiagnosis infeksi bakteri pada pasien sirosis hati dekompensata adalah 2,79ng/mL dengan sensitivitas 87,5% dan spesifisitas 86,4%. Kesimpulan: Pada pasien sirosis hati yang tidak terinfeksi bakteri, kadar PCT pasien dekompensata lebih tinggi dibandingkan dengan yang kompensata. Kadar PCT pasien sirosis hati dekompensata yang terinfeksi bakteri lebih tinggi dibandingkan dengan yang tidak terinfeksi bakteri. Sementara nilai titik potong kadar PCT untuk mendiagnosis infeksi bakteri pada pasien sirosis hati dekompensata adalah 2,79ng/mL.

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Background: Liver decompensated without bacterial infection may increase procalcitonin (PCT) level in liver cirrhosis patients. Previous studies did not provide conclusive results about the differences of PCT level due to specific liver compensation and bacterial infection.

Objective: To examine the role of PCT in assisting the diagnosis of bacterial infection in liver cirrhosis patients.

Methods: A cross sectional study was conducted in liver cirrhosis patients who were outpatients and admitted to Cipto Mangunkusumo Hospital, Jakarta between April and May 2016. Procalcitonin were examined and bacterial infection were identified using standard criteria for each type of infection being suspected. Analysis were performed to determine differences in the level of PCT among liver cirrhosis patients without bacterial infection and with bacterial infection, also to get cut off point of PCT for bacterial infection diagnosis in decompensated liver cirrhosis patients using receiver operating curve (ROC).

Results: There were 55 patients with liver cirrhosis, 65,5% male, with mean of age 55,34±1,308 years. A total of 38 (69,1%) patients had decompensated liver cirrhosis, while 22 (57,9%) of them without bacterial infection and 16 (42,1%) with bacterial infection. In the absence of bacterial infection, there was significant difference between PCT level in decompensated patients (0,738ng/mL±1,185) and 17 compensated patients(0,065ng/mL±0,022). Decompensated patients with bacterial infection (3,607ng/mL±0,643) had significantly higher PCT levels than those without bacterial infection(0,738ng/mL±1,185). From ROC, level of PCT for bacterial infection in decompensated liver cirrhosis was area under curve (AUC) 0,933 (IK 0,853-1,014). Cut off point of PCT for bacterial infection diagnosis in decompensated liver cirrhosis patients was 2,79ng/mL with a sensitivity of 87.5% and specificity of 86,4%.

Conclusion: In the absence of bacterial infection, PCT levels of decompensated patients was higher than compensated ones. Procalcitonin levels of decompensated liver cirrhosis patients with bacterial infection was higher than those without bacterial infection.Cut off point of PCT for bacterial infection diagnosis in decompensated liver cirrhosis patients was 2,79ng/mL."

"Latar Belakang: Salah satu sifat material restorasi yang sangat dibutuhkan dalam mencegah karies sekunder adalah sifat anti bakteri. Material yang mempunyai sifat anti bakteri lebih tinggi akan memiliki kemampuan pencegahan perkembangan biofilm yang lebih baik. Diantara berbagai jenis material restorasi yang berkembang di pasaran, Semen Ionomer Kaca (SIK) memiliki sifat anti bakteri yang paling baik. Hal ini dikarenakan SIK memiliki kemampuan pelepasan fluor. Dalam perkembangannya, Shofu Inc. memperkenalkan sebuah material bernama Giomer. Giomer merupakan material yang memiliki kemampuan pelepasan fluor. Giomer akan menciptakan fase glass-ionomer yang stabil, kemudian menginduksi reaksi asam basa antara fluor dan asam polikarboksilat dalam air yang dikembangkan sebagai filler Pre-Reacted Glass-Ionomer (PRG). Tujuan: Melihat pengaruh perbedaan kandungan fluor terhadap Pembentukan biofilm bakteri antara SIK dan Giomer. Metode: Sebanyak 32 sampel dipersiapkan dengan ukuran Ø 7 mm dan tinggi 2 mm, terdiri dari 16 sampel kelompok SIK dan 16 sampel kelompok Giomer yang kemudian akan didiamkan selama 3 hari dengan kultur bakteri Streptococcus mutans di dalam suhu 37oC. Bakteri akan dihitung menggunakan Colony Forming Unit dan gambaran permukaan material diamati menggunakan Scanning Electron Microscope serta analisis elemen yang terdapat di dalamnya menggunakan analisis EDX. Hasil: Hasil pengujian didapatkan bahwa biofilm bakteri yang pada permukaan Giomer lebih tinggi daripada biofilm bakteri pada SIK, meskipun tidak terdapat perbedaan yang bermakna secara statistik (p>0.05). Terdapat banyak kesamaan antara elemen yang terkandung dalam SIK dan Giomer diantaranya ion C, O, F, Na, Al, Si, P dan Ca.

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Background: One of the properties of restorative materials that is needed to prevent secondary caries is anti bacterial properties. Materials that have higher anti bacterial properties will be better in preventing the growth of biofilms. Among the various types of restorative materials, Glass Ionomer Cements have the best anti bacterial properties. This is due to GIC has the good ability in fluoride release. In its development, Shofu Inc. introducing a material called Giomer. Giomer is a material that has ability in fluoride release. Giomer will form a stable glass-ionomer phase, then induce an acid-base reaction between fluoride and polycarboxylic acid that is developed as a Pre-Reacted Glass-Ionomer (PRG) fillers. Objective: To see the effect of differences in fluoride amount on formation of bacterial biofilm between Glass Ionomer Cement and Giomer. Methods: A total of 32 samples were prepared with the size of 7 mm in diameters and 2 mm in height. The samples consist of 16 of GIC samples, and 16 of Giomer. Both materials then allowed to incubated for 3 days with Streptococcus mutans culture at 37oC. Bacteria will be counted using Colony Forming Unit, observation material surface using Scanning Electron Microscope and element analysis provided using EDX. Results: The results showed that the bacterial biofilm on Giomer surface was higher than GIC, although there is no significant difference. There are many similarities between the elements contained in GIC and Giomer including ion C, O, F, Na, Al, Si, P and Ca."