scholarly journals Kemampuan Susu Fermentasi Lactobacillus plantarum Menghambat Salmonella typhymurium Secara In Vitro

2010 ◽  
Vol 10 (2) ◽  
pp. 34-39
Author(s):  
Zuraida Hanum
Keyword(s):  
Lactobacillus Plantarum ◽  
Dry Matter ◽  
Room Temperature ◽  
Fermented Milk ◽  
Activity Test ◽  
Milk Fermentation ◽  
Temperature Observation ◽  
Plain Paper ◽  
Paper Disc

The ability of Lactobacillus plantarum fermented milk to inhibit Salmonella typhymurium in vitroABSTRACT. This research used Lactobacillus plantarum as a milk starter (concentration 3, 4, 5 %) and incubated for 48 hours at room temperature. Observation fermented begin from the first day of this product until 7 days and its still stored at room temperature. First analysis conducted on milk in this research were Storch, pH, acidity titration, fat, and dry matter. Milk fermentation analysis of Lactobcillus plantarum including pH, degree of dornik acidity and microbe activity test. Experimental design used is Repeated Measurement with three replications. Data colected analyzed by ANOVA test. If there is significant different between treatments, followed by Least Significant Test. Complete pasteurization result test (Storch) found that milk stay white, it means that peroksidase enzyme completely disappear and milk completely pasteurization. The ability of suppressing observed by Salmonella typhymurium in Nutrient Agar and challenge with Lactobacillus plantarum fermented milk 3%, 4% and 5% (50 μl/well). Tetracyline, chloramphenicol and a plain paper disc are used as control. Lactobacillus plantarum fermented milk of starter concentration 5%-first day has the biggest inhabitation zone by Salmonella typhimurium (9.39 mm). Range of pH showed between 4.84 to 4.14 and the acidity between 114.67 0D to 365.67 0D. Sensitivity test showed that Salmonella typhymurium more sensitive than chloramphenicol and tetracyline antibiotic.

scholarly journals Application of Selected Inoculant Producing Antifungal and Fibrinolytic Substances on Rye Silage with Different Wilting Time

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 879
Author(s):  
Seong-Shin Lee ◽  
Jeong-Seok Choi ◽  
Dimas Hand Vidya Paradhipta ◽  
Young-Ho Joo ◽  
Hyuk-Jun Lee ◽  
...  
Keyword(s):  
Lactobacillus Plantarum ◽  
Dry Matter ◽  
Lactobacillus Brevis ◽  
Neutral Detergent Fiber ◽  
Dry Matter Digestibility ◽  
Fiber Digestibility ◽  
Aerobic Stability ◽  
Commercial Inoculant

This research was conducted to determine the effects of selected inoculant on the silage with different wilting times. The ryes were unwilted or wilted for 12 h. Each rye forage was ensiled for 100 d in quadruplicate with commercial inoculant (Lactobacillus plantarum sp.; LPT) or selected inoculant (Lactobacillus brevis 100D8 and Leuconostoc holzapfelii 5H4 at 1:1 ratio; MIX). In vitro dry matter digestibility and in vitro neutral detergent fiber digestibility were highest in the unwilted MIX silages (p < 0.05), and the concentration of ruminal acetate was increased in MIX silages (p < 0.001; 61.4% vs. 60.3%) by the increase of neutral detergent fiber digestibility. The concentration of ruminal ammonia-N was increased in wilted silages (p < 0.001; 34.8% vs. 21.1%). The yeast count was lower in the MIX silages than in the LPT silages (p < 0.05) due to a higher concentration of acetate in MIX silages (p < 0.05). Aerobic stability was highest in the wilted MIX silages (p < 0.05). In conclusion, the MIX inoculation increased aerobic stability and improved fiber digestibility. As a result of the wilting process, ammonia-N in silage decreased but ruminal ammonia-N increased. Notably, the wilted silage with applied mixed inoculant had the highest aerobic stability.

scholarly journals Utilization of a novel feedstuff: effects of additives on the fermentation characteristics, chemical composition and in vitro digestibility of tetraploid black locust (Robinia pseudoacacia) silage

2019 ◽  
Vol 49 (7) ◽  
Author(s):  
Zhihao Dong ◽  
Junfeng Li ◽  
Lei Chen ◽  
Siran Wang ◽  
Tao Shao
Keyword(s):  
Lactic Acid ◽  
Chemical Composition ◽  
Lactobacillus Plantarum ◽  
Dry Matter ◽  
Neutral Detergent Fiber ◽  
In Vitro Digestibility ◽  
Fermentation Products ◽  
Fermentation Quality ◽  
Tetraploid Black Locust

ABSTRACT: This study was conducted to evaluate the effects of additives on the fermentation characteristics, chemical composition and in vitro digestibility of tetraploid black locust (TBL). The TBL leaves silage was either untreated (control) or treated with 1 × 106 cfu/g FM Lactobacillus plantarum (L), 1% glucose (G), 3% molasses (M), a combination of 1% glucose and Lactobacillus plantarum (L+G), or a combination of 3% molasses and Lactobacillus plantarum (L+M). Fermentation quality, chemical composition and nutrient digestibility were then analyzed. Ethanol and acetic acid concentrations were the dominant fermentation products in all silages except L+M silage. The L, G and L+G treatments failed to influence the fermentation. The M treatment increased (P<0.05) the lactic acid concentration and lowered (P<0.05) the pH when compared with control silage. The best fermentation properties were observed in L+M silage, as indicated by the dominance of lactic acid over ethanol in fermentation products. The M and L+M silages exhibited higher (P<0.05) dry matter, and M silage showed higher residual water-soluble carbohydrates than the control. Ensiling increased (P<0.05) the in vitro dry matter, neutral detergent fiber and acid detergent fiber degradability of TBL. Among the silages, M silage had the highest levels of dry matter, neutral detergent fiber and acid detergent fiber degradability. The obtained results suggested that application of lactic acid bacteria together with 3% molasses could be an effective strategy to prevent the occurrence of ethanol fermentation and improve fermentation quality of TBL silage; addition of fermentable sugars to TBL improves nutrient availability to ruminants.

Biological activity of the non-microbial fraction of kefir: antagonism against intestinal pathogens

2017 ◽  
Vol 84 (3) ◽  
pp. 339-345 ◽  
Author(s):  
Carolina Iraporda ◽  
Mário Abatemarco Júnior ◽  
Elisabeth Neumann ◽  
Álvaro Cantini Nunes ◽  
Jacques R Nicoli ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Biological Activity ◽  
Cell Model ◽  
Acetic Acid Bacteria ◽  
Fermented Milk ◽  
In Vitro Assays ◽  
Intestinal Epithelial ◽  
Milk Fermentation ◽  
Intestinal Pathogens

Kefir is a fermented milk obtained by the activity of kefir grains which are composed of lactic and acetic acid bacteria, and yeasts. Many beneficial health effects have been associated with kefir consumption such as stimulation of the immune system and inhibition of pathogenic microorganisms. The biological activity of kefir may be attributed to the presence of a complex microbiota as well as the microbial metabolites that are released during fermentation. The aim of this work was to characterise the non-microbial fraction of kefir and to study its antagonism againstEscherichia coli,Salmonellaspp. andBacillus cereus.During milk fermentation there was a production of organic acids, mainly lactic and acetic acid, with a consequent decrease in pH and lactose content. The non-microbial fraction of kefir added to nutrient broth at concentrations above 75% v/v induced a complete inhibition of pathogenic growth that could be ascribed to the presence of un-dissociated lactic acid. In vitro assays using an intestinal epithelial cell model indicated that pre-incubation of cells with the non-microbial fraction of kefir did not modify the association/invasion ofSalmonellawhereas pre-incubation ofSalmonellawith this fraction under conditions that did not affect their viability significantly decreased the pathogen's ability to invade epithelial cells. Lactate exerted a protective effect againstSalmonellain a mouse model, demonstrating the relevance of metabolites present in the non-microbial fraction of kefir produced during milk fermentation.

scholarly journals Potensi Yogurt Rosella Probiotik Lactobacillus plantarum IIA-1A5 atau Lactobacillus fermentum B111K dalam Mengasimilasi Kolesterol

2018 ◽  
Vol 7 (3) ◽  
Author(s):  
Asti Yosela Oktaviana ◽  
Irma Isnafia Arief ◽  
Irmanida Batubara
Keyword(s):  
Lactobacillus Plantarum ◽  
Streptococcus Thermophilus ◽  
Fermented Milk ◽  
Lactobacillus Fermentum ◽  
Lactobacillus Bulgaricus ◽  
Hibiscus Sabdariffa ◽  
Microbiological Characteristics ◽  
Functional Beverages ◽  
Vitro Analysis

Yogurt rosella susu kambing merupakan susu kambing fermentasi menggunakan bakteri stater “Lactobacillus bulgaricus dan Streptococcus thermophilus” serta ditambah ekstrak bunga rosella (Hibiscus sabdariffa L). Bakteri Lactobacillus plantarum IIA-1A5 dan Lactobacillus fermentum B111K digunakan sebagai probiotik pada pembuatan minuman yogurt rosella. Tujuan penelitian untuk mengevaluasi karakteristik dan kemampuan yogurt rosella probiotik dengan menggunakan L. plantarum IIA-1A5 dan L. fermentum B111K dalam mengasimilasi kolesterol secara in vitro dengan lama penyimpanan berbeda. Perlakuan yang dilakukan dalam penelitian ini adalah P1 : Yogurt dengan bakteri L. bulgaricus dan S. thermophilus, P2 : Yogurt rosella dengan L. bulgaricus dan S. thermophilus,  P3 : Yogurt rosella dengan bakteri L. bulgaricus, S. thermophilus dan L. plantarum IIA-1A5,  P4 : Yogurt rosella dengan bakteri L. bulgaricus, S. thermophilus dan L. fermentum B111K. Hasil penelitian menunjukkan bahwa bakteri L. plantarum IIA-1A5 dan L. fermentum memberikan pengaruh nyata (P<0.05) terhadap nilai viskositas, aktivitas air, total asam tertitrasi (TAT) selama penyimpanan 15 hari. Penggunaan bakteri L. plantarum IIA-1A5 dan L. fermentum B111K tidak memberikan pengaruh yang nyata (P>0.05) terhadap nilai total bakteri asam laktat (BAL) tetapi lama penyimpanan 15 hari memberikan pengaruh nyata (P<0.05). Karakteristik fisik, kimia dan mikrobiologi yogurt rosella probiotik Lactobacillus plantarum IIA-1A5 dan Lactobacillus fermentum B111K selama penyimpanan 15 hari masih baik dan layak untuk dikonsumsi. Selama penyimpanan 15 hari yogurt rosella probiotik Lactobacillus fermentum B111K (YRPF) memiliki potensi mengasimilasi kolesterol tertinggi dengan kolesterol terasimilasi sebesar 4.59 µg/ml dan persentase kolesterol terasimilasi sebesar 15.7%.Potency of Yogurt Roselle Probiotic Lactobacillus plantarum IIA-1A5 or Lactobacillus fermentum B111K in Assimilating CholesterolAbstractYogurt roselle milk goat is fermented milk goat using starter bacteria "Lactobacillus bulgaricus and Streptococcus thermophilus" probiotic bacteria added with rosella flower extract (Hibiscus sabdariffa L). The Lactobacillus plantarum IIA-1A5 and Lactobacillus fermentum B111K bacteria are used as probiotics in the manufacture of functional beverages of rosella yogurt. The objective of the study was to evaluate the characteristics and abilities of probiotic rosella yogurt by using L. plantarum IIA-1A5 and L. fermentum B111K in assimilating cholesterol by in vitro analysis with different storage times. Treatment conducted in this research was P1: yogurt with L. bulgaricus and S. thermophilus bacteria, P2: Yogurt with L. bulgaricus and S. thermophilus bacteria, P3: Yogurt with bacteria L. bulgaricus, S. thermophilus and L. plantarum IIA-1A5 bacteria, P4: rosella yogurt with stater bacteria and L. fermentum B111K. The results showed that L. plantarum IIA-1A5 and L. fermentum had significant effect (P <0.05) on viscosity, water activity, total titrated acids (TAT) during 15 days storage. The use of L. plantarum IIA-1A5 and L. fermentum B111K bacteria did not give significant effect (P> 0.05) to the total value of lactic acid bacteria (BAL) but 15 days storage time gave significant effect (P <0.05). Physical, chemical and microbiological characteristics of yogurt roselle probiotic L. plantarum IIA-1A5 and yogurt roselle probiotic L. fermentum B111K for 15 days storage are still good and feasible for consumption. During the 15 day storage of probiotic yogurt rosella L. fermentum B111K (YRPF) has the potential to assimilate the highest cholesterol with assimilated cholesterol by 4.59 μg/ml and the assimilated cholesterol percentage of 15.7% 

scholarly journals Effects of wilting and additives on the ensiling quality and in vitro rumen fermentation characteristics of sudangrass silage

2021 ◽  
Vol 34 (1) ◽  
pp. 56-65
Author(s):  
Jiang Chun Wan ◽  
Kai Yun Xie ◽  
Yu Xiang Wang ◽  
Li Liu ◽  
Zhu Yu ◽  
...  
Keyword(s):  
Production Rate ◽  
Lactobacillus Plantarum ◽  
Dry Matter ◽  
Rumen Fermentation ◽  
Gas Production ◽  
Nutrient Digestibility ◽  
Ruminal Fermentation ◽  
Fresh Matter ◽  
Positive Effects

Objective: This study was conducted to investigate the effects of molasses and <i>Lactobacillus plantarum</i> on the ensiling quality and <i>in vitro</i> rumen fermentation of sudangrass silage prepared with or without wilting.Methods: The ensiling experiment, measured with 3 replicates, was carried out according to a 2×4 (wilted stages×additives) factorial treatment structure. Dry matter of the fresh (210 g/kg fresh matter) or wilted (305 g/kg fresh matter) sudangrass were ensiled (packed into 5.0-L plastic jars) without additive (control) or with molasses (M), <i>Lactobacillus plantarum</i> (LP), or molasses + <i>Lactobacillus plantarum</i> (M+LP). After 60 days of ensiling, the silages were analyzed for the chemical, fermentation, and <i>in vitro</i> characteristics.Results: After 60 days of ensiling, the fermentation parameters were affected by wilted, the additives and the interactions of wilted with the additives (p<0.05). The M+LP treatment at wilted had higher lactic acid levels and V-score (p<0.05) but lower pH values and butyric acid concentrations than the other treatments. In comparison with sudangrass before ensiling, after ensiling had lower dry matter and higher non-fibrous carbohydrate. The <i>in vitro</i> gas production, <i>in vitro</i> dry matter digestibility, <i>in vitro</i> crude protein digestibility, and <i>in vitro</i> acid fiber detergent digestibility changed under the effects of the additives. Significant interactions were observed between wilted and the additives in terms of <i>in vitro</i> gas production at 48 h, asymptotic gas production, gas production rate, half time, and the average gas production rate. The total volatile fatty acid levels in the additive treatments were higher than those in the control.Conclusion: Wilting and supplementation with molasses and <i>Lactobacillus plantarum</i> had the ability to improve the ensiling quality and <i>in vitro</i> nutrient digestibility of sudangrass silage. The M+LP treatment at wilted exhibited the strongest positive effects on silage quality and <i>in vitro</i> ruminal fermentation characteristics.

Processed Dairy Beverages pH Evaluation: Consequences of Temperature Variation

2009 ◽  
Vol 33 (4) ◽  
pp. 319-323 ◽  
Author(s):  
Fabiana Vargas Ferreira ◽  
Roselaine Terezinha Pozzobon
Keyword(s):  
Temperature Variation ◽  
Room Temperature ◽  
Critical Level ◽  
Fermented Milk ◽  
Significance Level ◽  
Ph Values ◽  
Temperature Interaction ◽  
Fermented Dairy ◽  
Dairy Beverages

Objective: this study assessed the pH from processed dairy beverages as well as eventual consequences deriving from different ingestion temperatures. Study design: 50 adults who accompanied children attended to at the Dentistry School were randomly selected and they answered a questionnaire on beverages. The beverages were divided into 4 groups: yogurt (GI) fermented milk (GII), chocolate-based products (GIII) and fermented dairy beverages (GIV). They were asked which type, flavor and temperature. The most popular beverages were selected, and these made up the sample. A pHmeter Quimis 400 A device was used to verify pH. The average pH from each beverage was calculated and submitted to statistical analysis (Variance and Tukey test with a 5% significance level). Results: for groups I, II and III beverages, type x temperature interaction was significant, showing the pH averages were influenced by temperature variation. At iced temperatures,they presented lower pH values, which were considered statistically significant when compared to the values found for the same beverages at room temperature. Conclusion: all dairy beverages, with the exception of the chocolate-based type presented pH below critical level for enamel and present corrosive potential; as to ingestion temperature, iced temperature influenced pH reducing its values, in vitro.

scholarly journals Kemampuan Antibakteri Susu Fermentasi terhadap Escherichia coli dan Shigella

2017 ◽  
Vol 17 (1) ◽  
pp. 24-30
Author(s):  
Zuraida Hanum ◽  
Rastina Rastina ◽  
Veronica Wanniatie
Keyword(s):  
Escherichia Coli ◽  
Lactobacillus Plantarum ◽  
Pathogenic Bacteria ◽  
Shigella Flexneri ◽  
Inhibition Zone ◽  
Fermented Milk ◽  
Nutrient Agar ◽  
E Coli ◽  
Antibacterial Ability ◽  
Temperature Observation

ABSTRAK. Penelitian ini dilakukan dengan menggunakan starter Lactobacillus plantarum pada konsentrasi 3%, 4% dan 5% dan diinkubasi selama 48 jam pada suhu kamar. Pengamatan terhadap susu fermentasi dilakukan selama 8 hari. Uji antibakteri ini dilakukan untuk melihat apakah susu fermentasi tersebut mampu menekan pertumbuhan patogen enterobakteri. Selanjutnya dilakukan pengujian aktivitas penghambatan mikroba dari susu fermentasi terhadap bakteri patogen dengan tiga kali ulangan. Data yang diperoleh dianalisis secara statistik menggunakan ANOVA. Hasil pengamatan menunjukkan bahwa kemampuan susu fermentasi sebagai antibakteri terhadap Escherichia coli dan Shigella flexneri terjadi pada jumlah sel sebanyak (106 CFU/ml) di dalam nutrient agar. Fermentasi susu menggunakan konsentrasi 5% starter memperlihatkan luas zona hambat tertinggi yaitu 17.42 mm terhadap E. coli pada hari kedua. Sedangkan terhadap Shigella flexneri luas zona penghambatan sebesar 8.88 mm pada hari ketiga dengan konsentrasi starter yang sama. (The antibacterial ability of fermented milk to escherichia coli and shigella flexneri)ABSTRACT. The study was performed using Lactobacillus plantarum as starter at concentrations of 3%, 4% and 5% and incubated for 48 hours at room temperature. Observation of fermented milk conducted for 8 day. The antibacterial activity test was analyzed to find whether fermented milk able to  inhibit pathogen growth. The antibacterial ability of suppressing of Enterobacteriaceae growth  observed by using Escherichia coli and Shigella flexneri (106 CFU/ml) in Nutrient Agar and challenge to fermented milk using 3%, 4% and 5% starter or about (50 µl/well). Further testing of microbial inhibitory activity of fermented milk against pathogenic bacteria conducted by three replications. The data obtained were analyzed statistically using ANOVA. The results showed that the ability of fermented milk as antibacterial on Escherichia coli and Shigella flexneri occurred in the amount of sell as much as (106 CFU / ml) when it grown in nutrient agar. As a conclusion,  fermented milk using a 5% starter showed that the highest inhibition zone of 17.42 mm to E. coli on the second day observation. While  inhibition zone of  Shigella flexnerii was 8.88 mm on the third day with the same starter concentration.

scholarly journals Uji Antibakteri Ekstrak Metanol Kulit Buah Manggis (garcinia mangostana l.) Terhadap Staphyllococcus aureus dan Escherechia coli

2017 ◽  
Vol 6 (1) ◽  
pp. 25
Author(s):  
Sujono Sujono ◽  
Anik Nuryati
Keyword(s):  
Antibacterial Activity ◽  
Methanol Extract ◽  
Diffusion Method ◽  
Test Results ◽  
Disc Diffusion Method ◽  
Garcinia Mangostana ◽  
Activity Test ◽  
Paper Disc ◽  
Growth Of Bacteria

Alfa mangostin, gamma-mangostin and xanthone group compounds are secondary metabolites contained in mangosteen (G. mangostana L.) which can be isolated from the fruit, bark, leaves and rind of mangosteen. All three compounds were shown to inhibit stronger against Mycobacterium tuberculosis. Alfa mangostin also active against Staphylococcus aureus and Enterococcus bacteria that are resistant to vancomisin and methicillin. Objective of this study to determine the antibacterial activity of methanol extract of mangosteen rind against Staphyllococcus aureus and Escherechia coli in vitro. Antibacterial activity test used is the diffusion wells and paper disc diffusion method. The test results obtained antibacterial activity of methanol extract of mangosteen rind can inhibit the growth of Staphyllococcus aureus at a concentration of 16%, but below its resistance zone diameter Cyprofloxacin. As against Escherichia coli, the methanol extract of mangosteen rind could not inhibit the growth of bacteria.

scholarly journals Potensi Antagonistik Bakteri Lactobacillus plantarum Terhadap Bakteri Patogen Aeromonas salmonicida Secara In Vitro [The Potential Antagonistic Bacterium Lactobacillus plantarum Against Bacterial Pathogens Aeromonas salmonicida By In Vitro]

2019 ◽  
Vol 5 (2) ◽  
pp. 211
Author(s):  
Yunifar Amad, Rahayu Kusdarwati, Gunanti Mahasri
Keyword(s):  
Lactobacillus Plantarum ◽  
Pathogenic Bacteria ◽  
Bacterial Pathogens ◽  
Bacterial Pathogen ◽  
Aeromonas Salmonicida ◽  
Randomized Design ◽  
Antagonistic Potential ◽  
Completely Randomized Design ◽  
Paper Disc

Abstract Problems were often experienced by fish farmers is bacterial pathogen Aeromonas salmonicida which causes furunculosis disease in fish. The way to control the growth of this pathogenic bacteria was using antagonist bacteria of Lactobacillus plantarum. Growth of L. plantarum may inhibit contamination of pathogenic bacterial because of its ability to produce bacteriocins, produce lactic, moreover that these bacteria can produce hydrogen peroxide which can function as an antibacterial. This research aimed to provide information on the use of bacterial antagonists L. plantarum in inhibiting the growth of pathogenic bacteria A. salmonicida on In Vitro. This research was conducted on October 2012 until January 2013 at dry laboratory in Fisheries and Marine Faculty of Airlangga University Surabaya. This research used Completely Randomized Design (CRD) with five treatments and four replications. Bacteria L. plantarum with 0 concentration for control (A), 106 (B), 107 (C), 108 (D), 109 (E) tested challenge by paper disc method with 106 concentrate of pathogenic bacteria A. salmonicida in vitro. The results showed that L. plantarum with a concentration of 109 CFU/ml (E) was a treatment that produced average of obstacle on the distribution of A. salmonicida amounted to 12,375 mm. Then the treatment with a concentration of 108 CFU/ml (D) with the average of obstacle 8,95 mm. While treatment with a concentration of 107 CFU/ml (C) and 106 CFU/ml (B) was having average of obstacle 6.8 mm and 6 mm was not significantly different from the control (A) which had an average 6 mm obstacle. So it could be concluded that bacteria L. plantarum had antagonistic potential against bacterial pathogens A.salmonicida which indicated by the obstacle produced by L. plantarum on growth of pathogenic bacteria A.salmonicida.

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