scholarly journals Isolation, Characterization and Antimicrobial Activity of Lactic Acid Bacteria from Local Milk and Milk Products

2016 ◽  
Vol 29 (2) ◽  
pp. 76-82
Author(s):  
Tasneem Chowdhury ◽  
Jannatul Ferdouse
Keyword(s):  
Lactic Acid ◽  
Antifungal Activity ◽  
Lactic Acid Bacteria ◽  
Bacterial Load ◽  
Salmonella Typhi ◽  
Shigella Dysenteriae ◽  
Diffusion Method ◽  
Bacterial Strains ◽  
Milk Products ◽  
Streptococcus Uberis

In the present study fifteen Lactic Acid Bacteria (LAB) from milk and milk products were isolated, identified and tested for their antagonistic activity. All the samples were found to be acidic with a pH range of 6.0 to 6.8.The collected samples showed higher number of total bacterial load ranging from 3.24´10 5 to 1.04´10 8 cfu/ml. Out of fifteen isolates, nine isolates were found to belong to the genus Lactobacillus and identified as L. casei subsp. pseudoplantarum, L. homohiochii, L. salivarius, L. xylosus, L.fermentum, L.leichmannii , L.heterohiochii, L.casei, and L.plantarum,.The others were found to belong to the genus Streptococcus and identified as S. thermophilus , S. lactis, S. uberis, S.suis, S. faecalis, and S. equnius.The isolates showed antibacterial activity against four gram positive bacteria (Bacillus cereus, B. subtilis, B.megaterium, Staphylococcus aureus) and six gram negative bacteria (Escherichia coli, Shigella dysenteriae, Salmonella typhi, Salmonella paratyphi, Vibrio cholerae and Pseudomonas aeruginosa) by using the disc diffusion method. They also showed their antifungal activity against two fungi (Penicillium sp. and Aspergillus flavus) by modifying poisoned food technique. All of the fifteen isolates were active against one or more test pathogenic bacterial strains. Among them L. homohiochii (TM3/a) showed the highest zone of inhibition (30.3mm) against Salmonella typhi. Lactobacillus spp. showed more antifungal activity than Streptococcus spp. and Streptococcus uberis (TY4 /a) showed the highest antifungal activity (50%) against Penicillium sp.This preliminary work shows the potential application of LAB to improve safety of traditional fermented food and milk products.Bangladesh J Microbiol, Volume 29, Number 2, Dec 2012, pp 76-82

scholarly journals Potensi Beberapa Susu Fermentasi Komersial Sebagai Antifungi Candida albicans

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Nur Khikmah Nunung Sulistyani
Keyword(s):  
Candida Albicans ◽  
Lactic Acid ◽  
Antifungal Activity ◽  
Lactic Acid Bacteria ◽  
Fermented Milk ◽  
Plate Count ◽  
Diffusion Method ◽  
Milk Products ◽  
Fermented Dairy ◽  
Fermented Milk Products

Candida albicans cause opportunistic infection of the oral cavity. Probiotic has health benefits, produces organic acids as anti-C. albicans. The aim of this research was to determine the antifungal activity of commercial fermented milk products against Candida and viability of bacteria in commercial fermented milk products. The antifungal activity was determined using well diffusion method. Viability of lactic acid bacteria was done by plate count method. The results show that commercial fermented milk productshas an activity of anti-C.albicans were shown by irradical zone formed around well containing fermented dairy products. Viability of lactic acid bacteria 107-1010 CFU/mL.

scholarly journals Antibacterial activity of the bacteriocins producing- lactic acid bacteria isolated from some processed meat products against selected indicator bacterial strains

2021 ◽  
Vol 12 (2) ◽  
pp. 640-645
Author(s):  
Huda M Selman ◽  
Ahmed A Mahdi ◽  
Nagat A El Rofaei ◽  
Elnasri M Mutwali
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Meat Products ◽  
Salmonella Typhi ◽  
Diffusion Method ◽  
Processed Meat ◽  
Bacterial Strains ◽  
Central Public Health

In this study, a total of 25 Lactic Acid Bacteria (LAB) isolates from 15 samples [4 burgers, 4frankfurters, 3 pastramis, 2 sausages and 2baby faeces] were screened for their ability to produce inhibitory substances against three microorganisms which were isolated from meat products: (Salmonella typhi, Staphylococcus aureus and Escherichia coli). Other indicators (reference target organisms) were obtained from the Central Public Health Laboratory, Khartoum State, Sudan. These were: Salmonella typhi ATCC14023, Staphylococcus aureus ATCC29213 and Escherichia coli ATCC25922. The antagonistic activities of the isolates were screened by the direct spot-on-lawn method and well- diffusion method. A total of 25 isolates of LAB were obtained, 15 of which produced promising inhibition zones against all or some of the indicator bacterial strains.

scholarly journals Screening of GABA-Producing Lactic Acid Bacteria from Thai Fermented Foods and Probiotic Potential of Levilactobacillus brevis F064A for GABA-Fermented Mulberry Juice Production

2020 ◽  
Vol 9 (1) ◽  
pp. 33
Author(s):  
Jirapat Kanklai ◽  
Tasneem Chemama Somwong ◽  
Patthanasak Rungsirivanich ◽  
Narumol Thongwai
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Monosodium Glutamate ◽  
Salmonella Typhi ◽  
Shigella Dysenteriae ◽  
Fermented Foods ◽  
Gamma Aminobutyric Acid ◽  
Fermented Sausage ◽  
Gaba Content ◽  
Mulberry Juice

Gamma-aminobutyric acid (GABA), the inhibitory neurotransmitter, can be naturally synthesized by a group of lactic acid bacteria (LAB) which is commonly found in rich carbohydrate materials such as fruits and fermented foods. Thirty-six isolates of GABA-producing LAB were obtained from Thai fermented foods. Among these, Levilactobacillus brevis F064A isolated from Thai fermented sausage displayed high GABA content, 2.85 ± 0.10 mg/mL and could tolerate acidic pH and bile salts indicating a promising probiotic. Mulberry (Morus sp.) is widely grown in Thailand. Many mulberry fruits are left to deteriorate during the high season. To increase its value, mulberry juice was prepared and added to monosodium glutamate (MSG), 2% (w/v) prior to inoculation with 5% (v/v) of L. brevis F064A and incubated at 37 °C for 48 h to obtain the GABA-fermented mulberry juice (GABA-FMJ). The GABA-FMJ obtained had 3.31 ± 0.06 mg/mL of GABA content, 5.58 ± 0.52 mg gallic acid equivalent/mL of antioxidant activity, 234.68 ± 15.53 mg cyanidin-3-glucoside/mL of anthocyanin, an ability to inhibit growth of Bacillus cereus TISTR 687, Salmonella Typhi DMST 22842 and Shigella dysenteriae DMST 1511, and 10.54 ± 0.5 log10 colony-forming units (CFU)/mL of viable L. brevis F064A cell count. This GABA-FMJ was considered as a potential naturally functional food for human of all ages.

Uji Antifungi Susu Fermentasi Komersial pada Candida non-albicans

SCISCITATIO ◽  
2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Nur Khikmah ◽  
Nunung Sulistyani
Keyword(s):  
Hydrogen Peroxide ◽  
Lactic Acid ◽  
Antifungal Activity ◽  
Lactic Acid Bacteria ◽  
Organic Acids ◽  
Oral Candidiasis ◽  
Fermented Milk ◽  
Plate Count ◽  
Diffusion Method ◽  
Total Plate Count

Bakteri Asam Laktat (BAL) yang terkandung dalam susu fermentasi akan menghasilkan asam-asam organik, hidrogen peroksida, diasetil, asetaldehid, asetoin, reutinin, reuterisiklin dan bakteriosin, dapat sebagai anti-Candida. Spesies Candida non-albicans seperti C. tropicalis dan C. glabrata sebagai penyebab kandidiasis oral cenderung meningkat. Tujuan penelitian ini mengetahui aktivitas antifungi susu fermentasi komersial pada Candida non-albicans dan viabilitas bakteri asam laktat di dalam susu fermentasi komersial. Aktivitas antifungi pada Candida non-albicans dilakukan dengan metode difusi sumuran. Viabilitas bakteri asam laktat dihitung berdasarkan jumlah bakteri asam laktat sebagai jumlah bakteri total (Total Plate Count). Hasil penelitian menunjukkan bahwa susu fermentasi komersial lebih mampu menghambat C. tropicalis dibandingkan C. glabrata. Viabilitas bakteri asam laktat dalam susu fermentasi komersial 107-1010 CFU/mL. Lactic Acid Bacteria (LAB) contained in fermented milk will produce organic acids, hydrogen peroxide, diacetyl, acetaldehyde, acetoin, reutinin, reuterycline and bacteriocin, as anti-Candida. Candida non-albicans species such as C. tropicalis and C. glabrata as causes of oral candidiasis tend to increase. The aim of this research was to determine the antifungal activity of commercial fermented milk against Candida non-albicans and viability of lactic acid bacteria in commercial ermented milk. The antifungal activity was determined using well diffusion method. Viability of lactic acid bacteria is calculated as Total Plate Count. The results showed that commercial fermented milk was more able to inhibit C. tropicalis compared C. glabrata. Viability of lactic acid bacteria 107-1010 CFU/mL.

scholarly journals Changes in antagonistic activity of lactic acid bacteria induced by their response to technological factors

2015 ◽  
Vol 24 (4) ◽  
Author(s):  
Dovile Jonkuviene ◽  
Joana Šalomskienė ◽  
Asta Abraitienė ◽  
Irena Mačionienė ◽  
Jūratė Repečkienė ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Lactic Acid ◽  
Antifungal Activity ◽  
Lactic Acid Bacteria ◽  
Food Production ◽  
Negative Impact ◽  
Antagonistic Activity ◽  
Diffusion Method ◽  
High Antimicrobial Activity ◽  
Technological Factors

This study examined the changes in antagonistic activity of selected lactic acid bacteria (LAB) in response to technological factors used in food production. The antimicrobial activity of 12 selected LAB strains was assessed against the bacterial and fungal strains using the agar well diffusion method. Sodium chloride (NaCl) 6.5–8.0%, glucose 20-30% and pH 4.0, pH 8.0 and higher were the most crucial factors in reducing the spectra of the microorganisms antagonized. Heating at 80 °C or 100 °C had a greater negative impact than 63 °C on the antifungal activity of LAB. Freezing at –72 °C eliminated the antifungal activity, or it changed from fungicidal to fungistatic. Although each LAB demonstrated the ability to retain antimicrobial activity induced by various technological factors, Lactococcus lactis 768/5 was superior in retaining high antimicrobial activity against tested indicator strains.

scholarly journals Isolation and Identification of Lactic Acid Bacteria from Cow Milk and Milk Products

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Yeshambel Taye ◽  
Tadesse Degu ◽  
Haben Fesseha ◽  
Mesfin Mathewos
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Dairy Products ◽  
Bacterial Load ◽  
Cow Milk ◽  
Fermented Foods ◽  
Isolation And Identification ◽  
Milk Products ◽  
Selective Media ◽  
Lactobacillus Spp

Lactic acid bacteria (LAB) have long been consumed by people in several fermented foods such as dairy products. A study was conducted on lactating dairy cows to isolate and characterize LAB from dairy products found in and around Bahir-Dar city, North Western Ethiopia. Milk and milk products were randomly collected from dairy farms, milk vending shops, individual households, and supermarkets for bacteriological investigations. A total of sixteen samples were taken from different sources and cultured on different selective media: de Man, Rogosa, and Sharpe (MRS) agar for Lactobacillus spp.; M17 agar for Lactococcus spp.; Rogasa SL agar for Streptococci spp.; and MRS supplemented with cysteine (0.5%) for Bifidobacteria spp. Different laboratory techniques were implemented for LAB isolation and identification. A total of 41 bacterial isolates were grouped under five different genera of LAB and Bifidobacteria spp. were identified based on the growth morphology on the selective media, growth at a different temperature, gas production from glucose, carbohydrate fermentation, and other biochemical tests. LAB genera such as Lactobacillus, Lactococcus, Leuconostoc, Pediococcus, Streptococcus, and Bifidobacterium spp. were isolated and identified from raw milk, cheese, and yogurt. Based on the current study, the majority of the LAB (24.38%) was isolated from cheese and yogurt. Among these, Lactobacillus, Lactococcus (21.94%), Streptococcus (19.51%), Leuconostoc (14.64%), Bifidobacteria (12.19%), and Pediococcus (7.31%) spp. were also identified from these products. Furthermore, based on the bacterial load count and different identification methodologies, our study revealed that Lactobacillus spp. were the dominant LAB isolated from milk and milk products. As a result, since there are few studies on the isolation and identification of lactic acid bacteria from dairy products in Ethiopia, more research studies are needed to complete the identification and characterization to species level and their possible role as probiotics.

scholarly journals Potential use of bacteriocin producing lactic acid bacterial strain isolated from milk products and its application as the fish feed

2016 ◽  
Vol 4 (2) ◽  
pp. 61
Author(s):  
Sumita Devi Khumbongmayum ◽  
Veenagayathri Krishnaswamy
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Bacterial Strain ◽  
Chemical Properties ◽  
Antagonistic Activity ◽  
Fish Feed ◽  
Bacterial Strains ◽  
Gram Positive ◽  
Milk Products ◽  
Food Borne

Bacteriocins are gene-encoded inhibitory proteins and those produced by Gram-positive Lactic acid bacteria. Some bacteriocins even display antagonistic activity towards Gram-positive food borne pathogens and spoilage organisms. This present study involves isolation of Bacteriocin-producing lactic acid bacteria from a variety of milk and milk products. The physico-chemical properties of the isolated bacteriocin producing bacterial strains were screened. The isolated bacteriocin bacterial strains were biochemically characterized and identified. Further, the isolated effective bacterial strain was used as a fish feed and its effect on their growth was evaluated. The evaluated data continue to demonstrate that the bacteriocin producing bacterial strains will have greater potential in the food products industry.

Antibacterial Activity and Optimisation of Bacteriocin Producing Lactic Acid Bacteria Isolated from Beef (Red Meat) Samples

2016 ◽  
Vol 59 (2) ◽  
pp. 85-98
Author(s):  
Saiqa Andleeb ◽  
Nazish Mazhar Ali ◽  
Bushra Mazhar ◽  
Iram Khadija ◽  
Bushra Kalim
Keyword(s):  
Antibacterial Activity ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Bacterial Species ◽  
Meat Products ◽  
Diffusion Method ◽  
Bacterial Strains ◽  
Biochemical Tests ◽  
Food Borne ◽  
Meat Samples

Bacteriocin producing bacteria are commonly found in meat products to enhance theirshelf-life. In the present study, bacterial species were isolated from meat samples (beef) from differentlocalities of Lahore, Pakistan. MRS agar medium was used to isolate lactic acid bacteria (LAB) throughspread and streak methods (incubated for 72 h at 37 °C). Identification of bacteriocinogenic LAB strainswas done by using staining techniques, morphology based characteristics and biochemical tests. Thesestrains were BSH 1b, BSH 3a, BIP 4a, BIP 3a, BIP 1b and BRR 3a. Antibacterial activity of LAB wasperformed against food borne pathogens viz., Escherichia coli and Staphylococcus aureus through paperdisc diffusion method. Three bacterial strains showed maximum inhibition and characterised by ribotypingviz., BIP 4a was identified as Lactobacillus curvatus, BIP 3a was Staphylococcus warneri and BIP 1b wasLactobacillus graminis. Optimum pH 5-6.5 and 30-37 °C temperature for isolated bacterial strains wasrecorded. Protein concentration measured was 0.07 mg/mL for BSH 1b, 0.065 mg/mL for BSH 3a,0.057 mg/mL for BIP 4a, 0.062 mg/mL for BIP 1b, 0.065 mg/mL for BIP 3a and for BRR 3a 0.078 mg/mL,respectively. Bacteriocin of all isolates except BIP 3a was found to be sensitive towards pepsin and resistanttowards Rnase. Bacteriocin production was stable at between pH 5.0 and 6.0 and resistant temperaturewas 40 °C. It was concluded that lactic acid bacteria (LAB) from meat can be helpful as antibacterialagents against food-borne bacterial pathogens because of thermostable producing bacteriocin.

scholarly journals SELEKSI BAKTERI ASAM LAKTAT DENGAN AKTIVITAS ANTI JAMUR YANG DIISOLASI DARI SILASE DAN SALURAN CERNA TERNAK (Isolation of Lactic Acid Bacteria for Antifungal Activity Isolated from Silage and Animal Digestives Tract)

2015 ◽  
Vol 35 (02) ◽  
pp. 164 ◽  
Author(s):  
Ema Damayanti ◽  
Ade Erma Suryani ◽  
Ahmad Sofyan ◽  
Muhammad Faiz Karimy ◽  
Hardi Julendra
Keyword(s):  
Lactic Acid ◽  
Antifungal Activity ◽  
Lactic Acid Bacteria ◽  
Oil Palm ◽  
Diffusion Method ◽  
Mortality Effect ◽  
Oil Palm Frond ◽  
Promising Solution ◽  
Paper Disc ◽  
Palm Frond

Fungi contamination was a serious problem on feed industry in Indonesia. Mycotoxin was produced by contaminated fungi could decrease feed quality and it accumulation on animal caused immunosuppressive and mortality effect. The application of biological agent such as antifungal microbe was a promising solution and to be important for futher study. The objective of this research was to select lactic acid bacteria (LAB) with antifungal activity against mycotoxin producing fungi. Lactic acid bacteria were isolated from oil palm frond (OPF) silage, poultry and ruminant digestive tracts (cattle and goat). Antifungal activities of LAB was conducted by using overlay method and paper disc diffusion method of the cell free supernatant against   FNCC 6002,   FNCC 6033 and FNCC 6111. The result showed that LAB strain PDS2 from OPF silage had the highestKeywords: Animal, lactic acid bacteria, fungi, mycotoxin, oil palm frond silage ABSTRAKKontaminasi jamur dalam bahan pakan masih menjadi masalah dalam industri ternak di Indonesia. Selain karena menurunkan kualitas pakan, akumulasi mikotoksin yang dihasilkan oleh jamur kontaminan dalam tubuh ternak juga mengakibatkan efek immunosupresif yang  menyebabkan ternak mudah terserang penyakit hingga menyebabkan kematian. Penggunaan agen biologis berupa mikrobia dengan aktivitas anti jamur menjadi solusi menjanjikan dan penting untuk dikaji. Penelitian ini bertujuan untuk menyeleksi bajteri asam laktat (BAL) dengan aktivitas anti jamur penghasil mikotoksin. BAL diisolasi dari silase pelepah sawit, saluran cerna unggas dan ruminansia (kambing dan sapi).Pengujian aktivitas anti jamur dilakukan dalam secara kualitatif dengan metode dan secara kuantitatif dengan menguji daya hambat supernatan bebas sel menggunakan metode difusi kertas cakram terhadap kapang FNCC 6002,   FNCC 6033 dan   FNCC 6111. Hasil penelitian menunjukkan isolat PDS2 dari silase memiliki daya hambat yang nyata terhadap ketiga jamur uji, sedangkan isolat BAL dari saluran cerna unggas dan ruminansia tidak menunjukkan daya hambat yang nyata.Kata kunci: Anti jamur, bakteri asam laktat, saluran cerna ternak, silase

scholarly journals Evaluating the effectiveness of commercial teat disinfectant products sold in Ireland using the disc diffusion method

2021 ◽  
Author(s):  
S.R. Fitzpatrick ◽  
M. Garvey ◽  
J. Flynn ◽  
B. O’Brien ◽  
D. Gleeson
Keyword(s):  
Hydrogen Peroxide ◽  
Lactic Acid ◽  
Chlorine Dioxide ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Bacterial Strains ◽  
Disc Diffusion Method ◽  
Specific Product ◽  
Streptococcus Uberis ◽  
Zones Of Inhibition

Evaluation of teat disinfectant products for their effectiveness against the most prevalent mastitis-causing bacteria is important to identify the most effective ingredients against specific bacterial strains. Ninety-six commercially available teat disinfectant products were tested against three bacterial strains associated with mastitis in Ireland (Staphylococcus aureus, Streptococcus uberis and Escherichia coli) using the disc diffusion method. Products were reclassified by active ingredients (n = 9) for analysis. These ingredient groups included: chlorhexidine (n = 25), chlorine dioxide (n = 5), diamine (n = 1), iodine (n = 13), iodine combined with lactic acid (n = 5), lactic acid (n = 15), lactic acid combined with chlorhexidine (n = 21), lactic acid combined with hydrogen peroxide (n = 1) and lactic acid combined with salicylic acid (n = 10). The ingredient group chlorine dioxide resulted in the greatest zones of inhibition for all three bacterial strains. An individual product containing a combination of lactic acid and hydrogen peroxide resulted in the greatest zone of inhibition for Sta. aureus and Str. uberis, whereas a specific product within the chlorine dioxide group resulted in the greatest zones of inhibition for E. coli. High concentrations of active ingredient did not necessarily increase the effectiveness for the majority of teat disinfectant products. It is possible to use the disc diffusion method to evaluate/screen a large number of teat disinfectant products prior to conducting field trials to establish the products’ ability to reduce intramammary infections (IMI).

Sign in / Sign up

Export Citation Format

Share Document