ArticleCurrent microbiology2026
Bioassay-guided Isolation of Antibacterial Compounds from Ethanolic Extract of Alstonia scholaris (L.) R. Br. Leaves and Developmental Toxicity Evaluation in Zebrafish (Danio rerio) Embryos.
Article in Current microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Aquaculture faces severe threats from bacterial disease outbreaks, creating an urgent need for safe, and sustainable alternatives to synthetic antibiotics and harmful chemicals. Alstonia scholaris (L.) R. Br. (Apocynaceae), widely recognized in traditional medicine for its therapeutic potential, has received limited attention in aquaculture. This study evaluated the antimicrobial potency of A. scholaris leaf extracts against key fish pathogens. The ethanolic extract showed promising broad-spectrum antibacterial potency and further bioassay-guided fractionation of it targeting Pseudomonas fluorescens led to putative identification of oleanolic acid as the principal bioactive constituent. The isolated compound exhibited broad-spectrum antibacterial activities against P. fluorescens, Streptococcus agalactiae, and Streptococcus iniae. Safety evaluation using zebrafish embryos demonstrated that the ethanolic extract caused no mortality at or below 125 µg/mL and was found non-teratogenic, while, the isolated compound exhibited no embryotoxicity up to 300 µg/mL concentration. This study reports the first identification of oleanolic acid from the ethanolic extract of A. scholaris leaves using bioassay-guided fractionation targeting P. fluorescens. These findings highlight the potential of the A. scholaris leaves ethanolic extract and its isolated active compound as safe, effective, and sustainable antimicrobial alternatives for bacterial disease management in aquaculture.
Indexed as
Identifiers
42340473What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.