ArticleWorld journal of microbiology & biotechnology2025
Co-selection of antibiotic resistance and heavy metal tolerance in bacterial species isolated from automobile scrapyard soils.
Article in World journal of microbiology & biotechnology, 2025. 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
This study investigates the physicochemical properties, heavy metal concentrations, and bacterial profiles of contaminated scrapyard soils compared to fertile agricultural soil. The results indicate that scrapyard soils exhibit higher bulk density (1.10 1.30 g/cm³), lower organic carbon (0.80 1.10%), and reduced organic matter (1.37 1.90%) levels, suggesting deterioration in soil fertility. Electrical conductivity is significantly elevated (0.70 0.80 dS/m), indicating increased ionic strength. Heavy metal analysis reveals significantly higher concentrations of Pb (14 18 mg/kg), Cd (3 7 mg/kg), Zn (20 40 mg/kg), Cu (23 35 mg/kg), Ni (23 30 mg/kg), and As (3.85 5.5 mg/kg). Bacterial loads in scrapyard soils (3.08 3.76 Log CFU/g) are considerably lower than in control soil (7.88 Log CFU/g), alongside decreased soil enzyme activities, including dehydrogenase (130 170 µg TPF/g/h), urease (110 130 µg NH₄⁺/g/h), phosphatase (70-90 µg pNP/g/h), and catalase (85-95 µg O₂/g/h). The study isolates Sphingomonas paucimobilis, Klebsiella aerogenes, Acinetobacter baumannii, Klebsiella pneumoniae, Pseudomonas reactans, and Bacillus subtilis, which exhibit varying resistance to antibiotics and heavy metals. A strong correlation is observed between heavy metal tolerance and antibiotic resistance (r = 0.78 0.88, P < 0.05), suggesting a synergistic effect where metal exposure enhances bacterial resilience to antibiotics. Notably, the MICs of tetracycline and ampicillin increase substantially in Cd-exposed isolates (up to 35 µg/mL and 25 µg/mL, respectively), while Ni exposure in Pseudomonas reactans results in a two-fold increase in the MIC of chloramphenicol (from 10.5 µg/mL to 20 µg/mL). The correlation between soil enzyme activity and dominant bacterial species further highlights the influence of heavy metal contamination on microbial function. These findings underscore the environmental risks posed by scrapyard contamination and the adaptive mechanisms of multi-resistant bacteria in response to heavy metal stress.
Indexed as
Identifiers
40289057What 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.