sri Melia
Faculty of Animal Science, Universitas Andalas. Jl. Univ. Andalas, Limau Manis, Padang 25171, West Sumatra, Indonesia

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Antimicrobial potential of Pediococcus acidilactici from Bekasam, fermentation of sepat rawa fish (Tricopodus trichopterus) from Banyuasin, South Sumatra, Indonesia sri Melia; Endang Purwati; Yulianti Fitri Kurnia; Dhiva Rezzy Pratama
Biodiversitas Journal of Biological Diversity Vol. 20 No. 12 (2019)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d201210

Abstract

Abstract. Melia S, Purwati E, Kurnia Y. F, Pratama D. R. 2019. Antimicrobial potential of Pediococcus acidilactici from Bekasam, fermentation of sepat rawa fish (Tricopodus trichopterus) from Banyuasin, South Sumatra, Indonesia. Biodiversitas 20: 3532-3538. This study aimed to determine the antimicrobial potential of lactic acid bacteria isolated from bekasam. Bekasam is a result of sepat rawa fermentation from Banyuasin District, South Sumatra, Indonesia. The results showed that the morphological and biochemical properties of lactic acid bacteria were Gram-positive and cocci, negative catalase and included in homofermentative groups. The biggest antimicrobial activity was shown by bekasam isolate to Escherichia coli O157: H7 (21.26 mm), followed by Staphylococcus aureus ATCC25923 (18.23 mm) and Listeria monocytogenes CFSAN004330 (5.10 mm), while diameter barriers for crude bacteriocin supernatant isolates lactic acid bacteria to Escherichia coli O157: H7, Staphylococcus aureus ATCC25923 were 14.99 mm, 17.69 mm, and Listeria monocytogenes CFSAN004330 had no antimicrobial activity at neutral pH. The results of molecular identification with 16S rRNA showed that lactic acid bacteria isolated from bekasam isolate have similarity with Pediococcus acidilactici strain PB22 that has antimicrobial potential against pathogenic bacteria and potential as bio preservatives.
The quality of fermented goat milk produced by Pediococcus acidilactici BK01 on refrigerator temperature sri Melia; Indri Juliyarsi; Yulianti Fitri Kurnia; Yudha Endra Pratama; Dhiva Rezzy Pratama
Biodiversitas Journal of Biological Diversity Vol. 21 No. 10 (2020)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d211017

Abstract

Abstract. Melia S, Juliyarsi I, Kurnia YF, Pratama YE, Pratama DR. 2020. The quality of fermented goat milk produced by Pediococcus acidilactici BK01 on refrigerator temperature. Biodiversitas 21: 4591-4596. This research aimed to determine the quality of chemical and microbiological milk of goats fermented with Pediococcus acidilactici BK01 with the storage time on refrigerator temperature. The method used is the experimental method of Completely Randomized Design with five times the treatment of goat milk fermentation at the refrigerator temperature is over 0, 7, 14, 21, and 28 days with four repetitions. The results showed long-lasting storage of real effect (P < 0.05) on water content, pH, titratable acid, total lactic acid bacteria, and total plate count, but no noticeable effect (P > 0.05) on the protein levels and milk fat fermentation during the resulting storage. The value of moisture content during storage ranges between 85.88-84.92%, pH 4.48-4.28 , 3.69-3.49% fat content, 3.53-3.58% protein content, as well as the count of titratable acid ranging from 1.52-1.73%. The whole colonies of lactic acid bacteria reached between 9.106 log CFU/mL to 10.376 log CFU/mL, and the total plate count (TPC) value during storage experienced an increase from 2.653 log CFU/mL to 4.012 log CFU/mL. Based on the results of the study can be concluded that the milk of goat fermentation with P. acidilactici BK01 can maintain quality until the retention period of 28 days with the viability of lactic acid bacteria that meet the category as probiotics and still liked by the consumer.
Characteristics of lactic acid bacteria isolated from palm sugar from West Sumatra, Indonesia and their potential as a probiotic NURAZIZAH RAMADHANTI; SRI MELIA; JAMES HELLYWARD; ENDANG PURWATI
Biodiversitas Journal of Biological Diversity Vol. 22 No. 5 (2021)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d220520

Abstract

Abstract. Ramadhanti N, Melia S, Hellyward J, Purwati E. 2021. Characteristics of lactic acid bacteria isolated from palm sugar from West Sumatra, Indonesia and their potential as a probiotic. Biodiversitas 22: 2610-2616. Palm sugar is one of the sugar products from palm sap processing. It is made by reducing the water content in the sap to certain water content and is used as a natural sweetener. This study used palm sugar from 3 producers, i.e. Marapalam Gula Semut (MGS), Tetesan Gula Semut (TGS) and Sungayang Gula Semut (SGS) in Sungayang, West Sumatra, Indonesia. This study aimed to isolate and identify lactic acid bacteria (LAB) from palm sugar, potentially as a probiotic, using the 16S rRNA method. The probiotic potential of bacteria was selected based on morphology, biochemical properties, resistance to acidic pH 3 and 0.3% bile salts, antimicrobial activity against pathogenic bacteria. The results showed that lactic acid bacteria isolated from palm sugar are Gram-positive rod-shaped (Bassil), negative catalase, and homofermentative. The total colonies of lactic acid bacteria ranged from 50 x 107 cfu/g - 117 x 107 cfu/g. The MGS lactic acid bacteria had 74.71% viability resistance in acidic pH 3, 65.52% viability against bile salts (0.3% ox gall). The diameter of inhibition against Escherichia coli O157 was 18.20 mm, Propionibacterium acnes (18.00 mm), Acinetobacter baumannii (14.19 mm), and Listeria monocytogenes (16.35 mm). The phylogenetic tree based on 16S rRNA showed that the MGS isolate has a similarity of 99.92% to Lactobacillus fermentum strain 1743. It can be concluded that Lactobacillus fermentum strain 1743 isolated from palm sugar has potential as a probiotic.