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"ABSTRAKInfeksi saluran pernafasan akut ISPA merupakan infeksi yang paling sering terjadi pada manusia dengan angka morbiditas dan mortalitas yang tinggi, terutama di negara-negara Asia Tenggara dan Afrika. Sudah diketahui bahwa sebagian besar ISPA disebabkan oleh virus, namun data mengenai etiologi virus di negara berkembang, terutama Indonesia masih terbatas. Studi ini menggunakan metode molekuler berupa PCR dan sekuensing untuk deteksi serta karakterisasi virus saluran nafas umum, termasuk virus zoonosis pada sampel swab orofaring. Subjek studi sebanyak 100 pasien anak dan dewasa dengan gejala infeksi saluran nafas yang datang ke RSU Tabanan. Dari 100 pasien didapatkan angka deteksi virus positif sebesar 40 dan angka ko-deteksi 7 . Pada anak-anak angka deteksi positif mencapai 46 28/61 , sedangkan pada dewasa sebesar 31 12/39 . Virus utama yang terdeteksi adalah influenza 15 , enterovirus 14 dan herpesvirus 11 . Subtipe virus yang mendominasi hasil deteksi yaitu H3N2, human rhinovirus A dan human betaherpesvirus 5. Sebagai kesimpulan, diantara pasien-pasien dengan ISPA di Tabanan, sebagian besar virus yang terdeteksi adalah virus influenza dengan subtipe H3N2.

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ABSTRACT

Acute respiratory tract infection ARTI is the most common infection in human being. The morbidity and mortality rate is high, especially in Southeast Asia and Africa. While it is known that ARTIs are most commonly caused by virus, there are limited data about viral etiology of ARTI in developing countries, especially Indonesia. This study used molecular method to detect 10 common respiratory viral pathogens and zoonotic respiratory viruses. We collected oropharyngeal swabs from 100 patients in Tabanan Regency Hospital suspected with respiratory illness from all age groups. Among 100 patients tested, 40 tested positive for virus, with co detection rate 7 . In addition, positive detection rate in children was 46 28 61 and in adult 31 12 39 . Viruses that were most commonly detected include influenza 15 , enterovirus 14 and herpesvirus 11 . Among them, influenza virus subtype H3N2, human rhinovirus A and human betaherpesvirus 5 was the most frequently detected. In conclusion, among patients with ARTI in Tabanan Regency Hospital, influenza virus subtype H3N2 was the most predominant virus detected. "

"Latar Belakang: Pada tanggal 12 Maret 2020, World Health Organization (WHO) mengumumkan penyakit Coronavirus Disease 2019 (COVID-19) sebagai pandemi yang disebabkan oleh virus Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2). Infeksi virus dapat menyebabkan kolonisasi organ yang terinfeksi akibat penurunan respon imun oleh patogen akibat penurunan respons imun serta masuknya bakteri patogen melalui akses yang diperantarai oleh mikroorganisme oportunis. Hingga saat ini telah banyak studi yang membahas COVID-19 dari aspek epidemiologi dan karakteristik klinis namun informasi terkait infeksi sekunder akibat bakteri pada COVID-19 masih terbatas.Metode Penelitian: Penelitian ini menggunakan desain studi potong lintang dengan dengan menelusuri data rekam medis pasien yang memiliki riwayat perawatan pneumonia COVID-19 di ruang isolasi Pinere RSUP Persahabatan sejak 1 Januari 2021 - 31 Desember 2021. Total sampel pada penelitian ini adalah sebanyak 111 pasien.Hasil Penelitian: Total pasien pneumonia COVID-19 yang dirawat di ruang isolasi Pinere selama tahun 2021 yaitu sebanyak 718 pasien. Pasien yang memenuhi kriteria inklusi dan eksklusi adalah sebanyak 111 pasien. Karakteristik pasien pneumonia COVID-19 didominasi oleh jenis kelamin laki-laki, median usia 53 tahun, lama rawat 11 hari, status gizi obesitas, belum divaksin, derajat keparahan sedang, penggunaan antivirus remdesivir, antibiotik levofloksasin, azitromisin dan kortikosteroid. Terdapat pertumbuhan bakteri pada 41,5% hasil biakan yang terdiri dari gram negatif (38,8%) dan gram positif (2,7%). Klebsiella pneumoniae merupakan bakteri gram positif terbanyak yang tumbuh, sedangkan Enterococcus faecalis merupakan satu-satunya gram positif yang tumbuh. Tidak terdapat hubungan antara hasil biakan patogen saluran napas terhadap luaran pasien pneumonia COVID-19 (nilai p=0,738). Derajat keparahan tidak berhubungan dengan hasil biakan, tetapi berhubungan dengan luaran pasien pneumonia COVID-19.Kesimpulan: Tidak terdapat hubungan antara hasil biakan patogen saluran napas terhadap luaran pasien pneumonia COVID-19.

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Background: World Health Organization (WHO) declared Coronavirus Disease 2019 (COVID-19) as a pandemic caused by the Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) virus on March 12, 2020. Viral infections can cause colonization of infected organs due to decreased immune response and entry of pathogenic bacteria through access mediated by opportunistic microorganism. Until now, there have been many studies discussing COVID-19 from the aspect of epidemiology and clinical characteristics, but information regarding secondary infections caused by bacteria in COVID-19 is still limited.

Methods: The design of this study is cross-sectional by tracing the medical record data of patients who had a history of treatment for COVID-19 pneumonia in the Pinere isolation ward of Persahabatan General Hospital from January 1st 2021 to December 31st 2021. The total sample in this study was 111 patients.

Result: The total number of COVID-19 patients treated in the Pinere isolation room during 2021 is 718 patients. Patients who met the inclusion and exclusion criteria were 111 patients. The characteristics of COVID-19 patients were dominated by male, median age 53 years, length of stay 11 days obesity, not yet vaccinated, moderate severity, use of antiviral remdesivir, antibiotics levofloxacin, azithromycin and corticosteroid. There was bacterial growth in 41,5% of culture results consisting of gram negative (38,8%) and gram positive (2,7%). Klebsiella pneumoniae is the most gram positive bacteria that grows, while Enterococcus faecalis is the only gram positive that grows. There was no relationship between the results of respiratory tract cultures and the outcomes of COVID-19 patients (p value = 0.738). The severity of COVID-19 is not associated to culture results, but is associated to the patient’s outcome.

Conclusion: There was no relationship between the results of respiratory tract cultures and the outcomes of COVID-19 patients."

"[ABSTRAKLatar belakang. Kolitis infeksi adalah proses inflamasi pada usus besar yang disebabkan oleh infeksi bakteri patogen, seperti Shigella, Salmonella, E.coli, dan Campylobacter. Dibuktikan dengan pemeriksaan kultur tinja, tetapi biayanya cukup mahal, perlu waktu dan tidak selalu tersedia di semua fasilitas kesehatan. Rekomendasi WHO jumlah lekosit lebih dari 10 per LPB untuk Shigella disentriae dengan klinis disentri dan merupakan indikasi pemberian antibiotika. Sering ditemukan anak diare dengan lekosit kurang dari 10/LPB tetapi hasil kultur positif bakteri patogen. Mencari hubungan jumlah lekosit tinja dengan kejadian diare yang disebabkan infeksi bakteri patogen yang memerlukan terapi antibiotika.Tujuan. Mengetahui prevalensi, sebaran bakteri patogen, nilai leukosit mikroskopik tinja pada anak dengan kolitis infeksi bakteri. Mengetahui hubungan leukosit tinja dengan kultur tinja dan pola sensitivitas antibiotika pada kolitis infeksi bakteri.Metode. Penelitian deskriptif dengan metode potong lintang dan uji diagnostik untuk menilai sensitivitas hitung leukosit tinja untuk mendiagnosis kolitis infeksi bakteri. Penelitian dilakukan di Rumah Sakit Umum Pusat Rujukan Nasional Cipto Mangunkusumo, Jakarta, dari bulan Januari- Juni 2015.Hasil. Dari 45 subjek penelitian ditemukan kultur positif pada 19 subjek (42,2%). Bakteri terbanyak yang ditemukan adalah E.coli (79%), Salmonella sp. (10,5%), dan C.difficille (10,5%). Pada titik potong ROC ditemukan nilai lekosit >8 per LPB dengan sensitivitas 0,654 dan spesifisitas 0.632. E.coli masih memperlihatkan sensitivitas cukup tinggi terhadap kloramfenikol dan siprofloksasin tetapi tidak terhadap sefiksim. Salmonella sp. sensitif terhadap kloramfenikol, sefiksim, dan seftriakson, sedangkan C. difficile sensitif terhadap Seftriakson.Simpulan. Pada penelitian ini ditemukan sebanyak 19 (42,2%) subyek penderita diare hasil kultur tinja positif bakteri patogen dan pada titik potong ROC ditemukan nilai lekosit > 8 per LPB dengan sensitivitas 65.4% dan spesifisitas 63.2%. Pada pola sensitivitas antibiotika, E.coli sensitif terhadap kloramfenikol dan siprofloksasin dan Salmonella dan C.difficile sensitif terhadap seftriakson.

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ABSTRACTBackground. Infective colitis is an inflammatory process in the colon caused by pathogenic bacterial infection, such as Shigella, Salmonella, E.coli, and Campylobacter. Diagnosis is made by fecal culture, but the cost is relatively expensive, time-consuming, and not readily available in every health facility. WHO recommends that fecal leukocyte more than 10 per HPF for the diagnosis of Shigella disentriae with clinical symptom of dysentriae and indicated for antibiotic treatment. Often there are diarrheic children with leukocyte less than 10/HPF but the culture is positive for pathogenic bacteria. This study would like to look for the relationship between fecal leukocyte and incidence of diarrhea caused by pathogenic bacteria infection that requires antibiotic therapy.Objective. To study the prevalence, distribution of pathogenic bacteria, leukocyte count in fecal microscopic test in children with bacterial infective colitis. To study the relationship between fecal leukocyte and fecal culture with sensitivity pattern of antibiotics in bacterial infective colitis.Methods. Descriptive, cross-sectional study and diagnostic test to study the sensitivity of fecal leukocyte count in diagnosing bacterial infective colitis. Study was performed in the Cipto Mangunkusumo Hospital, Jakarta, from January to June 2015.Results. From 45 study subjects, positive culture was found in 19 subjects (42.2%), and the most common bacteria were E.coli (79%), Salmonella sp. (10.5%), and C. difficille (10,5%). At the ROC we found leukocyte count >8 per HPF as cutoff point with 0.654 sensitivity and 0.632 specificity. E. coli still showed relatively high sensitivity to chloramphenicol and ciprofloxacin, but not to cefixime. Salmonella sp. were sensitive to chloramphenicol, cefixime, and ceftriaxone, while C. difficile were sensitive to ceftriaxone.Conclusion. In this study there were 19 (42.2%) subjects with diarrhea, with positive fecal culture for pathogenic bacteria. At the ROC cutoff point we found leukocyte count > 8 per HPF with 65.4% sensitivity and 63.2% specificity. On the antibiotic sensitivity pattern, E. coli was sensitive to chloramphenicol and ciprofloxacin, while Salmonella dan C.difficile were sensitive to ceftriaxone, Background. Infective colitis is an inflammatory process in the colon caused by pathogenic bacterial infection, such as Shigella, Salmonella, E.coli, and Campylobacter. Diagnosis is made by fecal culture, but the cost is relatively expensive, time-consuming, and not readily available in every health facility. WHO recommends that fecal leukocyte more than 10 per HPF for the diagnosis of Shigella disentriae with clinical symptom of dysentriae and indicated for antibiotic treatment. Often there are diarrheic children with leukocyte less than 10/HPF but the culture is positive for pathogenic bacteria. This study would like to look for the relationship between fecal leukocyte and incidence of diarrhea caused by pathogenic bacteria infection that requires antibiotic therapy.Objective. To study the prevalence, distribution of pathogenic bacteria, leukocyte count in fecal microscopic test in children with bacterial infective colitis. To study the relationship between fecal leukocyte and fecal culture with sensitivity pattern of antibiotics in bacterial infective colitis.Methods. Descriptive, cross-sectional study and diagnostic test to study the sensitivity of fecal leukocyte count in diagnosing bacterial infective colitis. Study was performed in the Cipto Mangunkusumo Hospital, Jakarta, from January to June 2015.Results. From 45 study subjects, positive culture was found in 19 subjects (42.2%), and the most common bacteria were E.coli (79%), Salmonella sp. (10.5%), and C. difficille (10,5%). At the ROC we found leukocyte count >8 per HPF as cutoff point with 0.654 sensitivity and 0.632 specificity. E. coli still showed relatively high sensitivity to chloramphenicol and ciprofloxacin, but not to cefixime. Salmonella sp. were sensitive to chloramphenicol, cefixime, and ceftriaxone, while C. difficile were sensitive to ceftriaxone.Conclusion. In this study there were 19 (42.2%) subjects with diarrhea, with positive fecal culture for pathogenic bacteria. At the ROC cutoff point we found leukocyte count > 8 per HPF with 65.4% sensitivity and 63.2% specificity. On the antibiotic sensitivity pattern, E. coli was sensitive to chloramphenicol and ciprofloxacin, while Salmonella dan C.difficile were sensitive to ceftriaxone]"

"The antimicrobial effects of rhizophora apiculata pyroligneous acid on pathogenic microorganisms were evaluated. Pyroligneous acid (PA) and concentrated pyroligneous acid (CPA) showed parious levels of antimocrobial activity against 14 speciest of microorganisms (10 species of bacteria, 2 species of yeasts and 2 species of fungi) with bacteria, as the most suscaptible miicroorganisms. The bio-active component(s) of PA was isolated using dichloromethane as the extraction solvent (resulted in DCM A) and also an acid - base treatment to DCM A (resulted in DCM B) which was believed to contain all the valuable phenolic compounds in PA . Antimicrobial screening on DCM A and DCM B showed significant activity againts all the microorganisms tested. DCM B was further subjected to MIC/MLC (Minimum Inhibitory Concentration and Minimum Lethal Concentration) and SEM studies. The results showed that bacteria were the most susceptible againts DCM B with MIC/MLC value of 1.6-3. 1/3. 1-6.3 mg ml, while yeasts and fungi shared the same MIC/MLC value of 3.1/6.3 mg ml. The SEM study revealed that in addition of inhibiting the growth of the microorganisms, DCM B also caused severe morphological alterations on the cells of the microorganisms in which it was suggested that cell lysis and death had taken place."

"[Transmisi infeksi protozoa usus dapat diminimalisir melalui memperhatikan pola hidup bersih dengan baik. Pola hidup bersih terdiri dari status sanitasi dasar, kebersihan pribadi, dan kebersihan konsumsi. Penelitian ini dilakukan untuk mengamati hubungan antara pola hidup bersih dan temuan protozoa usus dengan menggunakan desain penelitian potong lintang. Pengambilan data dilakukan pada Juli 2014 terhadap 94 penduduk dewasa sebagai subyek penelitian di DKI Jakarta dan TPA Bantar Gebang. Subyek penelitian dibagi menjadi dua kelompok, status pola hidup bersih yang baik dan pola hidup bersih yang tidak baik. Hasil penelitian didapatkan pada 53 subyek dengan status sanitasi dasar yang baik ditemukan hanya 41,5% temuan protozoa usus positif. Pada 70 subyek dengan kebersihan pribadi yang baik, hanya 48,6% temuan protozoa usus positif. Pada 56 subyek dengan kebersihan konsumsi yang baik, hanya 39,3% temuan protozoa usus positif. Pada penelitian ini, didapatkan p:0,035; 0,409;0,006, berurutan.Rasio prevalensi pada kebersihan konsumsi yang didapatkan yakni 3 (IK 95% 1,4-7,9)., Transmission of the intestinal protozoan infection can be minimized by focusing on hygienic lifestyle. Hygienic lifestyle consists of basic hygiene, personal hygiene, and food hygiene. This research was made to observe the correlation between hygiene lifestyle and the finding of intestinal protozoan, using cross sectional design. The data collection was held in July 2014 to the 94 adult people as the research subjects in Jakarta and Bantar Gebang landfill. The research subjects were divided into two groups, good hygienic lifestyle and poor hygienic lifestyle. Result of this research was known that 53 subjects as good basic hygienic, positive finding of intestinal protozoan was only 41,5%. In 70 subjects as good personal hygiene, positive finding of intestinal protozoan was only 48,6%. In 56 subjects as good food hygiene, positive finding of intestinal protozoan was only 39,3%. In this research, p: 0,035; 0,409; 0,006, respectively. Prevalence ratio of food hygiene was 3 (CI 95% 1,4-7,9).]"

"Mikroba patogenbaik bakteri ataupun jamur merupakan mikroba pencemar yang menyebabkan suatu penyakit. Mikroorganisme ini berbahaya bila terdapat pada makanan yang dikonsumsi oleh anak usia sekolah dasar yang belum paham tentang kebersihan. Penelitian ini dilakukan untuk mengidentifikasi adanya cemaran mikroba patogen pada sampel makanan jajanan anak sekolah. Pengujian ini dilakukan terhadap beberapa sampel makanan seperti siomay, bakso tusuk, dan cireng isi dari lima sekolah dasar negeri di kecamatan Pamulang dan dibandingkan dengan persyaratan batas cemaran mikroba makanan yang ditetapkan oleh Badan Standarisasi Nasional. Pengujian yang dilakukan meliputi penetapan angka lempeng total/ALT, angka kapang khamir/AKK, APM Coliform, serta identifikasi Escherichia coli, Salmonella-Shigella, Staphylococcus aureus, dan Pseudomonasaeruginosa.Semua uji dilakukan menurut cara yang ada pada SNI 2897-2008. Hasil uji menunjukkan bahwa dari semua sampel yang diperiksa, sebagian besar memiliki nilai ALT dan AKK yang melebihi persyaratan, serta beberapa sampel makanan positif mengandung bakteri Salmonella sp. dan Staphylococcus aureus sehingga, dapat disimpulkan bahwa sampel makanan jajanan anak sekolah tidak memenuhi persyaratan batas maksimum cemaran menurut SNI 7388-2009.

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Pathogenic microbes, both bacterial and fungal are microbial contaminants that cause a disease. This microorganism is harmful when contain in foods consumed by elementary school-age children who do not understand about hygiene. The objective of this research was to identify the presence of microbial pathogens contamination in hawker foods sample for school children.

The experiment were conducted in several samples of food, for example siomay, bakso tusuk, and cireng isi from five public elementary schools on Pamulang sub-district and compared with requirement of maximum microbial contamination limit set by BSN (Badan Standarisasi Nasional). Type of experiment conducted were determination of total plate count/TPC, mold-yeast count/MYC, most probable number/MPN of Coliform, also identification of Escherichia coli, Salmonella-Shigella, Staphylococcus aureus, and Pseudomonas aeruginosa. All experiments were carried out based on method of SNI 2897-2008.

The result showed that of all samples tested, most have TPC and AKK value that exceeds the requirements. Several samples are positive for Salmonella sp. and Staphylococcus aureus, thus it can be concluded that the hawker food samples at the school do not meet the requirements of the maximum contaminant limit according to SNI 7388-2009."

"Keamanan pangan jajanan anak sekolah (PJAS) penting dikarenakan anak sekolah merupakan cikal bakal sumber daya manusia (SDM) suatu bangsa. Adanya cemaran mikroba patogen dalam makanan dan minuman dapat menimbulkan resiko penyakit. Penelitian ini dilakukan untuk mengidentifikasi ada atau tidaknya cemaran mikroba patogen pada sampel minuman jajanan anak sekolah. Pengujian ini dilakukan pada tiga sampel minuman seperti es jeruk, es susu kedelai, dan es liang teh yang diambil dari lima sekolah dasar negeri di kecamatan Pamulang kemudian dibandingkan dengan persyaratan batas cemaran mikroba makanan yang ditetapkan menurut Standar Nasional Indonesia (SNI). Uji yang dilakukan meliputi penetapan angka lempeng total/ALT, angka kapang khamir/AKK, angka paling mungkin (APM) Coliform, serta identifikasi pada Escherichia coli, Salmonella - Shigella, Staphylococcus aureus, dan Pseudomonas aeruginosa yang mengacu pada metode dalam SNI 2897-2008. Hasil uji menunjukkan bahwa ketiga jenis sampel yang diambil dari kelima sekolah dasar negeri di Kecamatan Pamulang, memiliki nilai ALT, AKK yang melebihi persyaratan, serta hampir semua sampel minuman positif mengandung bakteri Coliform, Escherichia coli, Staphylococcus aureus, dan Pseudomonas aeruginosa. Sehingga, dapat disimpulkan bahwa sampel minuman jajanan anak sekolah tidak memenuhi persyaratan batas maksimum cemaran mikroba dalam pangan menurut SNI 7388-2009.

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Safety of hawker food is important because school children are the forerunner of human resources of a country. The presence of microbial pathogens contaminant in the samples of hawker food can cause disease risk. This research aimed to identify the presence of microbial pathogens contamination in hawker drink sample for school children.

This experiment was conducted in three drink samples, for example orange ice, soy milk ice, liang ice tea that was taken from five public elementary schools on Pamulang sub-district and compared with requirement of maximum microbial contaminant limit set by BSN (Badan Standarisasi Nasional). Experiment was conducted involve determination of total platecount/TPC, mold-yeast count/AKK, most probable number/MPN of Coliform, also identification of Escherichia coli, Salmonella - Shigella, Staphylococcus aureus, and Pseudomonas aeruginosa based on method of SNI 2897-2008.

The test result showed that of three samples from five schools have TPC and AKK value that exceeds the requirements. Most of the drink samples are positive for Coliform, Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. Thus it can be concluded that the hawker drink samples at the school do not meet the requirements of the maximum contaminant limit according to SNI 7388-2009. "

"Tujuan: Metabolit yang dihasilkan oleh mikroorganisme merupakan sumber yang potensial untuk dieksplorasi guna memperoleh senyawa aktif antimikroba, salah satunya adalah kelompok biosurfaktan lipopeptida. Berbagai senyawa lipopeptida mempunyai aktifitas biologi yang tinggi. seperti aktifitas antikanker, antivirus, antipembekuan darah, immunomodulator, antiadesif, antiparasit, antibakteri dan antijamur. Tujuan dari penelitian ini adalah untuk mengeksplorasi kekayaan biodiversitas nasional dengan melakukan isolasi dan skrining mikroba penghasil biosurfaktan lipopeptida serta karakterisasi dari lipopeptida yang dihasilkan sebagai antimikroba untuk aplikasi di bidang biomedis.Metode: Isolasi dan skrining mikroba penghasil biosurfaktan lipopeptida dilakukan dengan mengambil sampel berupa tanah dan air dari lokasi yang tercemar minyak baik di darat maupun di laut. Isolat terpilih digunakan dalam proses fermentasi untuk produksi lipopeptida. Uji aktifitas antibakteri dilakukan terhadap beberapa bakteri uji gram positif maupun negatif. Senyawa aktif lipopeptida yang dihasilkan diisolasi dan dikarakterisasi strukturnya menggunakan spektrometri massa. Optimasi produksi juga dilakukan guna memperoleh kondisi proses yang optimal menggunakan Respon Surface Methodology. Studi efek kombinasi senyawa lipopeptida dengan antibiotik lain dilakukan menggunakan metode double disk dan metode checkerboard.Hasil: Diperoleh mikroba penghasil biosurfaktan lipopeptida Bacillus amyloliquefaciens MD4-12 yang diisolasi dari lokasi di sekitar kilang minyak Pertamina di Palembang. Lipopeptida yang dihasilkan mampu menghambat pertumbuhan bakteri uji gram positif dan negatif secara in-vitro menggunakan metode difusi cakram termasuk bakteri resisten MRSA (methicillin resistant strain Staphylococcus aureus) dan E. coli ATCC 32518, bakteri penghasil betalaktamase. Hasil karakterisasi senyawa menunjukkan bahwa lipopeptida yang dihasilkan adalah surfaktin homolog yang terdiri dari C12-C17 surfaktin. Pada optimasi produksi senyawa surfaktin diperoleh peningkatan produksi sebesar 2,4 kali dari perolehan sebelum dilakukan optimasi, yaitu dari 0,51 g/L menjadi 1,21 g/L. Studi kombinasi senyawa lipopeptida dengan antibiotik ampisilin menunjukkan efek sinergi dan aditif dalam menghambat pertumbuhan bakteri uji Pseudomonas aeruginosa ATCC 27853. Nilai FIC indeks yang diperoleh berkisar antara 0,31 ? 0,63. Penelitian ini menunjukkan potensi senyawa lipopeptida surfaktin sebagai antibakteri untuk aplikasi di bidang biomedis.

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Objective. Metabolites produced by microorganisms are potential sources to be explored to obtain biological active compound. One of them belongs to lipopeptide biosurfactants group. Various active compounds of lipopeptide have high biological activity for biomedical application such as anticancer, antiviral, inhibit fibrin clot formation, immunomodulators, antiadesif, antiparasitic, antibacterial and antifungi. The aim of this study was to explore the national biodiversity to obtained microbial lipopeptide biosurfactants producers with antimicrobial activity.

Methods: To isolate and screen lipopeptide-producing microbes, soil and water samples were taken from oil contaminated from terrestrial and marine. Selected isolates were used for fermentation to produce lipopeptides. Active compound were isolated and characterized structurally by mass spectrometry. Optimization of production was also carried out to obtain optimal process conditions using the Response Surface Methodology. The effect of lipopeptides combination with other antibiotics for antimicrobial activity were performed against several test bacteria using double disc and checkerboard methods.

Result: Lipopeptide biosurfactant-producing microbe was obtained from the soil sample around Pertamina oil refinery plant at Palembang. Furthermore the isolate was identified as Bacillus amyloliquefaciens MD4-12. The Lipopeptides capable to inhibit the growth of gram positive and negative tests bacteria in-vitro, including resistant bacteria MRSA (methicillin resistant strain Staphylococcus aureus) and E. coli ATCC 32518, a betalactamase-producing strain, using diffusion disc method. Characterization of lipopeptide compounds using mass spectrometry showed that the lipopeptide is surfactin homolog consist of C12-C17 surfactin. Optimum medium composition was obtained during optimization of surfactin production using respon surface methodology. Surfactin production increased 2.4 times from 0.51 g/L, prior to optimization, to 1.21 g/L. Combination lipopeptide with ampicillin for antibacterial activity showed synergistic and additive effects against the test bacteria Pseudomonas aeruginosa ATCC 27853. The range of FIC index is 0.31 to 0.63. This research showed that surfactin lipopeptide have great potency for antimicrobial activity for biomedical application."