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Iman Rusmana
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kPERHIMPUNAN MIKROBIOLOGI INDONESIA (SeKretariat PERMI), Gedung 10.2 Indonesian Life Sciences Center (ILSC), Zona Bisnis Teknologi Puspiptek, Jalan Raya Serpong - Bogor Gunung Sindur, Jawa Barat 16340, Indonesia. Email: microbiology.indonesia@gmail.com
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INDONESIA
Microbiology Indonesia
ISSN : 19783477     EISSN : 20878575     DOI : -
Core Subject : Health, Science,
Microbiology Indonesia provides a unique venue for publishing original researches in microbiology (espesially from Indonesian reseachers), and ensures that authors could reach the widest possible audience. Microbiology Indonesia publishes a wide range of research disciplines on bacteria, archaea, fungi, protozoa, and virus as well as biotechnology related to microbiology. Topics include (but are not limited to): -methods in microbiology, -bioprocess, -environmental microbiology, -food microbiology, -plant-microbe interaction, -animal-microbe interactions, -microbial community, -microbial genetics, -virology, -comparative and functional microbial genomics, -and gene expression in microbes.
Articles 187 Documents
Comparison of Microbial Pattern Causing Urinary Tract Infection in Female Out- and Hospitalized Patients in Jakarta ROSANA, YEVA; OCVIYANTI, DWIANA; KARUNIAWATI, ANIS; AKHMAD, SYADZA RHIZKY PUTRI
Microbiology Indonesia Vol. 10 No. 1 (2016): March 2016
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.10.1.5

Abstract

Urinary Tract Infection (UTI) is an infection in any part of the urinary system. Women are 3 times more likely to have UTI than men. The UTI accounts for 15% infection cases in outpatients and 24% cases in hospitalized patients. Although the most common cause of UTI is certain bacteria, but it was not easy to choose the appropriate antimicrobial therapy. Strategy for choosing empiric antimicrobial treatments for UTI in female out- and hospitalized patients should be based on the pattern of the causative organisms. The aim of this study was to understand the microbial pattern causing UTI in female out- and hospitalized patients in Jakarta. The UTI -1 causative microorganisms were obtained from urine culture containing 100,000 cfu/mL . Twenty nine microorganisms were found as the causative agents of UTI in 317 pregnant women who came to six Community Health Centres (Puskesmas) in Jakarta: Makassar; Pulogadung, Cakung, Pasar Rebo, Duren Sawit, and Kramat Jati for antenatal care. Twenty nine microorganisms were isolated from 114 urine samples of female hospitalized patients who were diagnosed of UTI. The samples were obtained from the Microbiology Laboratory Clinic of FKUI-RSCM. The most common microorganisms causing UTI in female out- and hospitalized patients were Gram negative bacteria. In female outpatients, Klebsiella sp was the most common causative bacteria (31%), followed by Escherichia coli (24.1%). In female hospitalized patients, Escherichia coli was the most common causative bacteria (30%), followed by Candida sp (24.1%) and Klebsiella pneumonia (6.8%). There was more variation in the pattern of UTI causative organisms in hospitalized female patients in comparison to that of the outpatients. Candida sp. was only found in hospitalized UTI patients but not in outpatients.
Bacterial Population and Chemical Characteristics of Fermented Mandai Cempedak with Starter Induction
Microbiology Indonesia Vol. 12 No. 3 (2018): September 2018
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.12.3.3

Abstract

Traditionally fermented foods can be improved by introducing starter and hygienic production. The study observes the changes in population of lactic acid bacteria (LAB), pH, polyphenolic levels, and antioxidant activity of spontaneous and L. casei induced mandai cempedak fermentation at 37 °C for seven days. The hygienic process included two steps boiling of inner skin of cempedak at 80-90 °C for 15 minutes. LAB and non-LAB growth were quantified with plate count. Phenolic substances were spectrophotometrically quantified. Gallic acid (GAE), tannic acid (TAE), and catechin (CE) were used as standards. DPPH method was employed to measure antioxidant activity. LAB dominated bacteria population during the course of fermentation. The LAB grew from 3,3±0,5 to 8,8±0,6 log cfu/ml for spontaneous fermentation and from 3,3±0,4 to 9,0±0,5 log cfu/mL for starter induced fermentation. The population of BAL in spontaneous and L. casei induced fermentation grew in almost similar fashion and can be approached by linear regression. The degree of acidity increased during the course of fermentation and achieving pH 3,5 at the sixth day of fermentation. Fermentation increased the phenolic contents both in spontaneous and L. casei induced fermentation, and resulting in enhancing the antioxidant activity. The phenolic contents, except total tannins, were higher in starter induced fermentation, thus lowering IC50 inhibitions of DPPH reduction. Hence, L. casei produced fermented products with better antioxidant activity in comparison to spontaneously fermented products. From these parameters, L. casei was successfully used as starter for mandai cempedak and optimum fermentation at 37 °C was 6 days.
The Growth of Leptolyngbya HS-16 and HS-36 on 35oC with pH Variation
Microbiology Indonesia Vol. 12 No. 3 (2018): September 2018
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.12.3.1

Abstract

The observation of Leptolyngbya growth on temperature 35oC with initial pH variation had been done. The study was descriptive research. The study aimed to determine the best initial growth pH for Leptolyngbya HS (Hot Spring)-16 and HS-36. Leptolyngbya HS-16 was isolated from Pancar Mountain hotspring, while Leptolyngbya HS-36 was isolated from Maribaya hot spring.  The acidity (pH) of Pancar mountain and Maribaya hot spring was 7. Each strain was grown in Blue Green medium number 11 (BG-11) with variation initial pH (6, 7, 8 and 9) and incubated on 35 oC. Parameters was wet biomass weight of Leptolyngbya in each strain. Observation were made on 15 days with 11 sampling. From the observation, the average of wet biomass weight of Leptolyngbya HS-16 was obtained at pH 6 (0,0295 g/L), pH 7 (0,0404 g/L), pH 8 (0,03825 g/L), and pH 9 (0,02735 g/L), meanwhile Leptolyngbya HS-36 was obtained at pH 6 (0,02905 g/L), pH 7 (0,01995 g/L), pH 8 (0,05345 g/L) and pH 9 (0,05995 g/L) on the 15th day. The results of 15 days observation showed that the best initial pH for growing Leptolyngbya HS-16 is 7, while Leptolyngbya HS-36 is 9. From this study it could be seen that Leptolyngbya HS-16 and HS-36 could be cultured with alkaline condition. 
Isolation and Urease Activity Test of Bacteria for Calcium Carbonate (Calcite) Precipitation (Biocementation) in Soil AMBARSARI, HANIES; RIDLO, AFLAKHUR
Microbiology Indonesia Vol. 12 No. 3 (2018): September 2018
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.12.3.2

Abstract

The use of bacterial calcium carbonate (calcite) precipitation (biocementation) has recently become popular as a ground-improvement technique. Ureolytic bacteria having highly urease activities were known to have important roles in calcium carbonate precipitation process. One of our research objectives is to isolate and to select as many as possible such ureolytic bacteria from Indonesian soils to be further utilized for calcium carbonate (calcite) precipitation process in the soil for strengthening the soil structure. Isolation was performed anaerobically in selective media containing 40% urea. Four isolates with different morphologies were purified and coded as TK1, TK2, TK3, and TK4. Each of them was tested for its urease activity either as a pure culture or as a mixture of several cultures. The urease activity was measured based on the ammonia concentration produced in the growth media up to 7 x 24 hours. It was known that isolate TK4 had the highest urease activity on week 6, whilst a mixture of isolate cultures coded as TKC did not show a better urease activity than the isolate TK4. Hence, it could be concluded that the isolate TK4 was the best candidate to be used for further research on the calcium carbonate (calcite) precipitation process (biocementation) to strengthen the soil structure.
The Administration of Pseudoalteromonas piscisida 1UB through Artemia sp. to Enhance Growth Performance, Immune Response and Resistance of White Shrimp (Litopenaeus vannamei) Larvae against Vibrio harveyi
Microbiology Indonesia Vol. 12 No. 3 (2018): September 2018
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.12.3.4

Abstract

This study aimed to evaluate the effectiveness of the supplementation of Pseudoalteromonas piscisida 1UBthrough Artemia sp. to enhance the growth performance, immune response and the resistance of white shrimp (Litopenaeus vannamei) larvae to the infection of Vibrio harveyi. The natural feed given to the white shrimp larvae was Artemia sp. enriched with P. piscisida 1UBR at concentrations of 106 CFU mL-1, 107 CFU mL-1, 108 CFU mL-1 and a control (Artemia sp. without any enrichment). The experimental shrimps (0.25±0.02 mg shrimp-1) were reared in the aquarium (25 × 20 × 30 cm) containing 4 L sea water with a stocking density of 30 shrimps L-1. The experimental shrimps were fed the experimental feed from mysis 3 to PL12, and after that they were challenged with V. harveyi (107 CFU mL-1)through an immersion method. The results of this study revealed that the administration of Artemia sp. enriched with P. piscisida 1UB could improve the survival, daily growth rate and absolute growth of length of white shrimp larvae. The activities of protease, lipase and amylase of white shrimp larvae treated with probiotic were higher (p<0.05) than those of the control. After the challenge test, white shrimp larvae treated with probiotic also had better survival and immune response (total hemocyte count, phagocytic activity, phenoloxidase activity and respiratory burst activity) than those of the the positive control. The best results were obtained in the probiotic application with a concentration of 108 CFU mL-1.
The Potency of Aluminum Hydroxide Nanoparticles for Dengue Subunit Vaccine Adjuvant PAMBUDI, SABAR; MARDLIYATI, ETIK; RAHMANI, SILMI; SETYAWATI, DAMAI RIA; WIDAYANTI, TIKA; GILL, ANGELINA; SULFIANTI, ASRI; LESTARI, WHINIE
Microbiology Indonesia Vol. 12 No. 3 (2018): September 2018
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.12.3.5

Abstract

The potency of aluminum hydroxide as an adjuvant in vaccine development is considered to depend on its particle size. In previous studies, we have successfully prepared two size particle, micro, and nano, aluminum hydroxide gel (alum) adjuvants. The potency of those particles as a candidate of adjuvant is needed to be characterized. In this study, we formulated our adjuvants with purified DENV3 pre Membrane Envelope (prM-E) recombinant protein and evaluated the induction of nitric oxide level in mouse macrophage RAW 264.7 cells. We prepared the alum adjuvant by precipitation-homogenization methods with an agitation rate at 11,000xg. Secreted prM-E recombinant protein was collected from Pichia pastoris X-33 fermentation which produced using bioreactor. Recombinant protein purification was carried out by anion exchange chromatography followed with size exclusion chromatography. The purified prM-E recombinant protein was observed as a single band around 70 -1k Da with a concentration of 105 mg mL . Complex nanoparticles alum with prM-E protein significantly (p<0.05) induced the nitric oxide level. Further analysis should be conducted in order to discover the detail molecular mechanism of nanoparticle alum adjuvant, recombinant protein, and cellular immune response.
Growth Characteristics of Chikungunya Virus Isolate from Indonesia in Various Human Cell Lines in vitro TURNIP, OKTAVIANI N.; HAYATI, RAHMA F.; ALAWIYAH, RIZKA; YOHAN, BENEDIKTUS; DENIS, DIONISIUS; BOWOLAKSONO, ANOM; SOEBANDRIO, AMIN; SASMONO, R. TEDJO
Microbiology Indonesia Vol. 13 No. 1 (2019): March 2019
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.13.1.1

Abstract

Chikungunya (CHIK) fever, a febrile illness caused by Chikungunya virus (CHIKV) infection, is one of mosquito-borne viral diseases affecting people living in the tropical and subtropical regions in the world. The pathogenesis of the disease is yet to be completely unraveled, and research on CHIK has been conducted by employing various methods, including using cell lines to investigate the biological characteristics of CHIKV in vitro. To assess the suitability of human cell line model for CHIK study, various human cell lines including A549, Huh7, and HepG2 were infected with CHIKV and assayed for their susceptibility to infection. The MTT and plaque assay methods were performed to measure cell viability and virus growth kinetics, respectively. Fluorescence-activated Cell Sorting (FACS) and immunofluorescence assay were performed to measure the proportion of infected cells in the system and their morphological visualization. Both A549 and Huh7 human cell lines showed stable high cell viability upon infection while CHIKV growth kinetics were significantly lower in these cells compared to Vero-CCL81, a monkey cell line that is routinely used in other arboviruses research. Interestingly, we observed significantly different results in HepG2 human cell line, in which cell viability and CHIKV growth kinetics were significantly higher. FACS and immunofluorescence assay confirm the higher infection rate of CHIKV in HepG2 than A549 human cell line. We concluded herethat human hepatocytes HepG2 cell line was susceptible to Asian Genotype of CHIKV and proposed as an alternative cell for the in vitro CHIKV studies to the commonly used A549 and Vero cells.
Isolation of a Functional Gene Encoding Homologous Lysophospholipase from Indonesian Indigenous Bacillus halodurans CM1 FERNANDA, SHANNI; ABINAWANTO, ABINAWANTO; HELIANTI, IS
Microbiology Indonesia Vol. 13 No. 1 (2019): March 2019
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.13.1.2

Abstract

Lipase is a biocatalyst widely used in industry, for example detergent, pharmaceutical, food, or oil purification. One of the most widely lipase used for oil purification is lysophospholipase. As much as 50% of industrial enzyme needs are supplied from microorganisms. However, enzyme productivity from wild type microbial strain is usually limited and not applicable in industry, so that genetic engineering is necessary. Cloning gene encoding for lysophospholipase from Aspergillus niger and Cryptococcus neoformans have been conducted, but has never been conducted from alkalothermophilic bacteria, such as Bacillus halodurans. Bacillus halodurans CM1 is an alkalothermophilic bacterial strain isolated previously that has many industrially potential enzymes. This study aimed to isolate one of the gene encoding lipase from Bacillus halodurans CM1 and cloned into Escherichia coli DH5α using the pGEM-T easy vector. The gene fragment encoding lysophospholipase obtained with size 783 base pairs and had 100% similarity with gene encoding lysophospholipase from Bacillus halodurans C-125 (No access GenBank: BA000004.3). E. coli harbouring the recombinant plasmid with the gene also showed activity on trybutiryn medium compared to negative control.
ENDOPHYTIC FUNGI IN Paraserianthes falcataria: PRODUCTION OF INDOLE ACETIC ACID WULANDARI, REINE SUCI; SURYANTINI, ROSA
Microbiology Indonesia Vol. 13 No. 1 (2019): March 2019
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.13.1.3

Abstract

Identification of endophytic fungi in Paraserianthes falcatria is the effort of the potential of endophytic fungi as phytohormone producer.  Phytohormone is needed to spur shoot and root initiation.  This study in P. falcatariais necessary when woody of P. falcataria decreases every year.  The aimed of the study were to identify endophytic fungi from leaves, twigs, and roots of P. falcataria, and determine IAA content from endophytic fungi.  Isolates that were grown from leaves, twigs and roots cuttings on PDA, were identified based on micro- and macromorphology. Determining of IAA content was counted with spectrophotometer vis based on a calibration curve from the standard solution.  The results were obtained 10 of isolates fungi from leaves, twigs, and roots.  But from 10, only nine isolates that could be identified.  They were Aspergillus sp., Acremonium sp., Cladosporium sp., Trichoderma sp. 1, Phytium sp., Rhizoctonia sp., Trichoderma sp. 2, Hormiscium sp. 1 and Hormiscium sp. 2.  Production of indole acetic acid (IAA) from Cladosporium sp. had the highest content than others (311 ppm).  The lowest IAA content (51.97 ppm) was produced by the Rhizoctonia sp.  The study can be continued to find out their abilities as PGPF agents and biopesticides of P. falcataria seedlings.
Induced defense related enzyme activities of tomato plant by indigenous endophytic bacteria and challenged by Ralstonia syzigii subsp. indonesiensis YANTI, YULMIRA; WARNITA, WARNITA; REFLIN, REFLIN
Microbiology Indonesia Vol. 13 No. 1 (2019): March 2019
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5454/mi.13.1.4

Abstract

Our previous research had screened 9 best indigenous endophytic isolates for their ability to control Ralstonia syzigii subsp. indonesiensis, the causal agents of bacterial wilt disease in tomato (Lycopersicon esculentum) in green house condition. Those 9 strains were Bacillus cereus EPL1.1.3, B. cereus TLE2.3, B. toyonensis EPL1.1.4, Serratia nematodiphila TLE1.1, B. anthracis SNE2.2, B. cereus E1.AB1.2, B. cereus E1AB2.1, Enterobacter cloacae subsp. dissolvens TLE2.2 and S. marcescens KLE3.3. The purposed of this study is to test the ability of the endophytic bacteria strains in increasing defense related enzyme activities of tomato. Bacterial strains were tested for its ability to induce the defense-related enzymes which were phenylalanine ammonia lyase (PAL), peroxidase (PO) and polyphenol oxidase (PPO) in roots and leaves of tomato plants. R. syzigii subsp. indonesiensis inoculated to host plants 7 days after the endophyte bacteria strains inoculation. Enzyme activities were recorded at 0, 1, 3, 5, 7, 9, 12 and 15 days after pathogen inoculation (dpi).  It was observed that PAL, PO and PPO activities were significantly increased in all of the endophytic bacteria inoculated treatments compared to control plant. Activities of PAL in the leaves was fast similar to the roots; but PO activities was higher in the roots compared to that in the leaves, whereas PPO activities was higher in the leaves than in the roots. PAL and PO reached the maximum level at different time in the leaves (3 dpi and 15 dpi), in the roots (5 dpi and 12 dpi), whereas PPO in the leaves at 12 dpi and in the roots at 9 dpi.

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