scholarly journals Antibacterial activity of Ulva intestinalis, U. faciata, and U. lactuca against biofilm-associated bacteria

2020 ◽  
Vol 24 (7) ◽  
pp. 669-676
Author(s):  
Saba Rizwan ◽  
Ghazala Siddiqui ◽  
Mahwish Shoaib ◽  
Khalid Mahmood ◽  
Habib -Ul- Hassan
Keyword(s):  
Antibacterial Activity ◽  
Associated Bacteria ◽  
Ulva Intestinalis

scholarly journals Antibacterial Activity of Volatile Organic Compounds Produced by the Octocoral-Associated Bacteria Bacillus sp. BO53 and Pseudoalteromonas sp. GA327

Antibiotics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 923
Author(s):  
Anette Garrido ◽  
Librada A. Atencio ◽  
Rita Bethancourt ◽  
Ariadna Bethancourt ◽  
Héctor Guzmán ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Solid Phase ◽  
Resistant Bacteria ◽  
Bacillus Sp ◽  
Antibiotic Resistant Bacteria ◽  
Antibiotic Resistant ◽  
Associated Bacteria ◽  
Volatile Organic

The present research aimed to evaluate the antibacterial activity of volatile organic compounds (VOCs) produced by octocoral-associated bacteria Bacillus sp. BO53 and Pseudoalteromonas sp. GA327. The volatilome bioactivity of both bacteria species was evaluated against human pathogenic antibiotic-resistant bacteria, methicillin-resistant Staphylococcus aureus, Acinetobacter baumanni, and Pseudomonas aeruginosa. In this regard, the in vitro tests showed that Bacillus sp. BO53 VOCs inhibited the growth of P. aeruginosa and reduced the growth of S. aureus and A. baumanni. Furthermore, Pseudoalteromonas sp. GA327 strongly inhibited the growth of A. baumanni, and P. aeruginosa. VOCs were analyzed by headspace solid-phase microextraction (HS-SPME) joined to gas chromatography-mass spectrometry (GC-MS) methodology. Nineteen VOCs were identified, where 5-acetyl-2-methylpyridine, 2-butanone, and 2-nonanone were the major compounds identified on Bacillus sp. BO53 VOCs; while 1-pentanol, 2-butanone, and butyl formate were the primary volatile compounds detected in Pseudoalteromonas sp. GA327. We proposed that the observed bioactivity is mainly due to the efficient inhibitory biochemical mechanisms of alcohols and ketones upon antibiotic-resistant bacteria. This is the first report which describes the antibacterial activity of VOCs emitted by octocoral-associated bacteria.

scholarly journals Sexual ornamentation reflects antibacterial activity of ejaculates in mallards

2011 ◽  
Vol 7 (5) ◽  
pp. 740-742 ◽  
Author(s):  
Melissah Rowe ◽  
Gábor Árpád Czirják ◽  
Kevin J. McGraw ◽  
Mathieu Giraudeau
Keyword(s):  
Antibacterial Activity ◽  
Phenotypic Traits ◽  
Sperm Function ◽  
Male Reproductive Success ◽  
Bacterial Killing ◽  
Associated Bacteria ◽  
Sexually Transmitted ◽  
Sexual Ornamentation ◽  
Ornamental Traits

Bacteria present in ejaculates can impair sperm function and reduce male reproductive success. Thus, selection should favour the evolution of antimicrobial defences to limit the detrimental effects of sperm-associated bacteria. Additionally, current hypotheses suggest that ornamental traits may signal information about the infection status of an individual or the ability of an individual to resist bacterial-induced sperm damage. However, despite the evolutionary implications of ejaculate antimicrobials, and the putative importance of pathogens for the evolution of male ornamentation, tests of these hypotheses are lacking. We examined the antibacterial activity of semen from mallard ducks ( Anas platyrhynchos ) and tested whether the bactericidal capacity of semen was associated with bill coloration, a sexually selected trait. We show that mallard semen exhibits significant antibacterial activity, as measured by the in vitro capacity to kill Escherichia coli and Staphylococcus aureus . Furthermore, we demonstrate that males with more colourful bills have semen with superior bacterial-killing ability. These results suggest that females could use male phenotypic traits to avoid sexually transmitted pathogens and acquire partners whose sperm suffer less bacteria-induced damage.

scholarly journals ISOLASI DAN KARAKTERISASI BAKTERI PENGHASIL SENYAWA ANTIBAKTERI YANG BERASOSIASI DENGAN KARANG BATU DARI PERAIRAN BITUNG DAN SPONS DARI SELAT MAKASSAR

Jurnal BIOMA ◽  
2015 ◽  
Vol 11 (1) ◽  
pp. 42
Author(s):  
FRANSISCA SUNNY ◽  
TRI HANDAYANI KURNIATI ◽  
ARIANI HATMANTI
Keyword(s):  
Antibacterial Activity ◽  
Diffusion Method ◽  
Marine Agar ◽  
Antibacterial Compounds ◽  
Associated Bacteria ◽  
Antibacterial Assay ◽  
Sponge Associated Bacteria ◽  
Oxidase Test ◽  
El Tor ◽  
Produce Acid

ABSTRACT Recently the needs of antibacterial compounds is increasing. This is due to the bacterial resistence to common antibacterial  compounds.  coral  and  sponge-ssociated  bacteria  are  potential  producer of antibacterial compounds. This research was aim to obtain coral and sponge-associated bacteria that could produce antibacterial compound. coral associated-bacteria was isolated from Bitung and   was isolated in Marine Agar by pour plate method. The antibacterial compounds were obtained by extraction using ethyl acetate and acetone. The antibacterial assay was performed by agar diffusion method using paper discs and was performed by testing with  Staphylococcus  aureus,  Bacillus  subtilis, Vibrio cholerae biotipe El Tor, and Escherichia coli. Total 37 isolate  was  isolated  from  corals and 25 isolate from sponge obtained from Selat Makassar. Based on the assay, only bacteria from sponge that showed antibacterial activity. Two sponge-associated bacteria, S.5-8 and  S.2-1 NRBC were found to inhibit S. aureus. From those isolates, isolate S.5-8 produced bigger clear zone (2,6 mm) than S.2-1 NRBC (1,5mm). S.5-8 could hydrolize gelatine whereas S.2-1 NRBC showed positive result on oxidase test and was able to fement xilose and arabinose to produce acid.   Key words: antibacterial activity, association, characterization, coral, isolation, sponge

Isolation and Screening of Brittlestar-Associated Bacteria for Antibacterial Activity

2002 ◽  
Vol 44 (6) ◽  
pp. 450-459 ◽  
Author(s):  
E.D. Strahl ◽  
W.E. Dobson ◽  
L.L. Lundie,
Keyword(s):  
Antibacterial Activity ◽  
Associated Bacteria

Isolation and screening of marine associated bacteria from Tamil Nadu, Southeast coast of India for potential antibacterial activity

2008 ◽  
Vol 58 (4) ◽  
pp. 605-609 ◽  
Author(s):  
Subramanian Vijayalakshmi ◽  
Maniramakrishnan Santhana Ramasamy ◽  
Shanmugasudaram Murugesh ◽  
Annappan Murugan
Keyword(s):  
Antibacterial Activity ◽  
Tamil Nadu ◽  
Associated Bacteria ◽  
Southeast Coast Of India ◽  
Southeast Coast

scholarly journals Selection of sponge-associated bacteria with high potential for the production of antibacterial compounds

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Riyanti ◽  
Walter Balansa ◽  
Yang Liu ◽  
Abha Sharma ◽  
Sanja Mihajlovic ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Synergistic Effects ◽  
16S Rrna Gene Sequencing ◽  
Rrna Gene ◽  
Field Station ◽  
Associated Bacteria ◽  
Sponge Associated Bacteria ◽  
Macrolactin A ◽  
Host Sponge ◽  
Selection Of

AbstractThe potential of sponge-associated bacteria for the biosynthesis of natural products with antibacterial activity was evaluated. In a preliminary screening 108 of 835 axenic isolates showed antibacterial activity. Active isolates were identified by 16S rRNA gene sequencing and selection of the most promising strains was done in a championship like approach, which can be done in every lab and field station without expensive equipment. In a competition assay, strains that inhibited most of the other strains were selected. In a second round, the strongest competitors from each host sponge competed against each other. To rule out that the best competitors selected in that way represent similar strains with the same metabolic profile, BOX PCR experiments were performed, and extracts of these strains were analysed using metabolic fingerprinting. This proved that the strains are different and have various metabolic profiles, even though belonging to the same genus, i.e. Bacillus. Furthermore, it was shown that co-culture experiments triggered the production of compounds with antibiotic activity, i.e. surfactins and macrolactin A. Since many members of the genus Bacillus possess the genetic equipment for the biosynthesis of these compounds, a potential synergism was analysed, showing synergistic effects between C14-surfactin and macrolactin A against methicillin-resistant Staphylococcus aureus (MRSA).

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