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All Journal E-Jurnal Medika Udayana Biotropika Biology, Medicine, & Natural Product Chemistry Meditory : The Journal of Medical Laboratory Journal of Clinical Microbiology and Infectious Diseases Folia Medica Indonesiana
Indraningrat, Anak Agung Gede
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Health Professions Immunology & microbiology Medicine & Pharmacology Neuroscience Public Health

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Antibacterial Activity Screening Of Bacterial Isolates Associated With Seaweed Eucheuma cottonii From Coastal Area In Buleleng, Bali Purnami, Pande Putu Christine Putri; Indraningrat, Anak Agung Gede; Darmayasa, Ida Bagus Gede
Biotropika: Journal of Tropical Biology Vol. 10 No. 2 (2022)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.biotropika.2022.010.02.07

Abstract

Seaweeds like other marine organisms develop a strong association with prokaryotic communities, especially bacteria. Many of these associated bacteria play an important role in synthesizing secondary metabolites which are beneficial for their host, especially against predation or infection. In Indonesia, Eucheuma cottonii is one of the seaweed species that has been cultivated widely.  However, only limited study has been reported on bacterial isolates and their antibacterial activity from E. cottonii.  Bacterial isolates from E. cottonii were cultivated in six agar media namely Zobell Marine Agar, Nutrient Agar, Plate Count Agar, ISP-1, ISP-2, and Starch-M protein agar. Cultivation of bacterial isolates yielded 23 isolates with nine bacterial isolates were classified as Gram-positive bacteria and 14 isolates were grouped among Gram-negative bacteria. All the bacterial isolates were screened for their antibacterial activity against six bacterial indicator strains namely Staphylococcus aureus ATCC 25923, Streptococcus mutans FNCC 0405, Escherichia coli ATCC 25922, and Klebsiella pneumoniae ATCC 700603 using perpendicular streak and agar block method. Six out of 23 bacterial isolates displayed antibacterial activity against at least one of the bacterial indicator strains. The bacterial isolate ISP1RL4 showed the highest antibacterial activity with average inhibition of  > 20 mm against all bacterial indicators. Overall, our result indicated the potential of bacterial isolates associated with E. cottonii as an antibacterial producer.
Biofilm Formation in Staphylococcus aureus and Coagulase-Negative Staphylococcus Setiabudy, Marta; Masyeni, Dewa Ayu Putri Sri; Indraningrat, Anak Agung Gede; Suryawan, Kadek; Adhiputra, I Ketut Agus Indra; Rahman, Muhammad Amirul bin Abdul
Folia Medica Indonesiana Vol. 59, No. 3
Publisher : Folia Medica Indonesiana

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Abstract

Highlights: 1. The significance of Staphylococcus aureus and coagulase-negative Staphylococcus, which are more likely to infect immunocompromised patients, needed to be researched in greater depth. 2. Coagulase-negative Staphylococcus was found to form significantly more biofilm than Staphylococcus aureus. 3. Wound care and changing medical devices in immunocompromised patients on a regular basis may provide benefits to prevent biofilm formation by Staphylococcus spp. Abstract Staphylococcus spp. are typically commensal microorganisms that can exist in the human body without causing illness. However, these bacteria have virulence factors, e.g., biofilm formation, that are important to note. Because biofilms shield bacteria from opsonophagocytosis and antimicrobial agents, they can cause persistent or chronic infections. Once they form biofilms, both Staphylococcus aureus and coagulase-negative Staphylococcus (CoNS) can potentially cause incurable infections. This study aimed to compare biofilm formation in Staphylococcus aureus and coagulase-negative Staphylococcus as a guide for the prevention and management of infection, which will maintain and improve the good health of the general population. This was an analytic research with a cross-sectional design. The study began by collecting the samples, identifying the species, and testing the biofilm production with a microtiter plate, which was then analyzed with an enzyme-linked immunosorbent assay (ELISA). Data analysis was conducted using IBM SPSS Statistics for Windows, version 25.0 (IBM Corp., Armonk, N.Y., USA). Comparison tests were conducted using an independent t-test. A value of p<0.05 was used as the cut-off that indicated significance. The total samples were 36 clinical isolates, consisting of 18 Staphylococcus aureus and 18 coagulase-negative Staphylococcus. The specimens consisted of 20 blood samples (55.6%) and 7 wound swabs (19.4%). The biofilm test on the samples showed that 83.3% of the samples produced biofilms. The data revealed that the isolates formed biofilms, with 14 isolates (38.9%) in the strong category, 10 isolates (27.8%) in the moderate category, and each of 6 isolates (16.7%) in the weak and non-existent categories. Both Staphylococcus spp. appeared to have biofilm-forming activity, but coagulase-negative Staphylococcus appeared to be significantly more dominant (p=0.008). Strong biofilm was produced by 61.1% of coagulase-negative Staphylococcus isolates. In conclusion, coagulase-negative Staphylococcus formed a stronger biofilm than Staphylococcus aureus. Its presence as an infection-causing bacteria, particularly in immunocompromised patients, should not be underestimated.
Co-Authors Adhiputra, I Ketut Agus Indra AR, Sunthio Barran Cia Arta, Ni Kadek Dewi Asri Tiara Choe, Daegeun Fridayanthi, Putu Utari Ida Ayu Agung Idawati Ida Bagus Gede Darmayasa Kadek Karang Agustina Kadek Lila Antara Kirtanayasa, I Gede Yoga Ayuning Made Dharmesti Wijaya Maheswari, Ida Ayu Kartika Natania, Evellyne Ni Nyoman Sri Budayanti Paramasatiari, Anak Agung Ayu Lila Prihantara, Komang Gede Yudha Purnami, Pande Putu Christine Putri Putri Herawati, Putri Putu Arya Suryanditha Rahman, Muhammad Amirul bin Abdul Setiabudy, Marta Sri Masyeni, Dewa Ayu Putri Suryawan, Kadek Udiyani, Desak Putu Citra Widhidewi, Ni Wayan Widowati, I Gusti Ayu Rai - Yanti, Ni Komang Semara