کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6122875 | 1592416 | 2015 | 9 صفحه PDF | دانلود رایگان |
- This is the first report of Aeromonas infection on a large scale of specimens in China.
- The distribution of Aeromonas species in clinical and environmental samples is different.
- The resistance to most of antibiotics was higher in strains from the water than those from stools.
- Aquatic Aeromonas has acquired a wide of antibiotic resistance compared to clinical sources.
SummaryObjectivesTo determine the prevalence of Aeromonas infections in diarrheal patients, the distribution of virulence-associated genes and antibiotic resistance among different Aeromonas species in China.MethodsWe conducted continual active surveillance aimed on Aeromonas from diarrheal patients and aquatic samples. Aeromonas strains were identified by biochemical tests, further confirmed to species level by a multilocus phylogenetic analysis. Potential virulence genes were detected by PCR. Antibiotics susceptibility testing was carried based on the minimal inhibitory concentration.ResultsFrom 5069 samples (stool specimens, n = 4529; water samples, n = 540) in China, 257 Aeromonas isolates [stools, n = 193 (4.3%); water, n = 64 (11.9%)] were identified by biochemical tests. The most common species from stools and water were Aeromonas veronii (42.5%) and Aeromonas caviae (37.5%), respectively. Distribution of five potential genes were significantly different between stool and water samples, two genes (ast and alt) were higher in stool than in water samples (P < 0.01). Meanwhile, three species (A. veronii, A. caviae and Aeromonas aquariorum) account for the six most prevalent combination patterns of potential genes. Furthermore, strains resistant to nine antibiotics was markedly higher in strains isolated from water than those from stools (P â¤Â 0.003); in contrast, resistance to only two antibiotics was higher in strains isolated from stools compared to those from water. In addition, strains containing multiple antibiotic resistance (MAR) from stools (8.6%; 16/187) and water (30.2%; 19/63) were resistant to ten or more antibiotics.ConclusionOur study highlights the multiple factors involved in the pathogenesis of Aeromonas and reveals that environmental Aeromonas has acquired a wide range of MAR compared to those from clinical sources.
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Journal: Journal of Infection - Volume 70, Issue 6, June 2015, Pages 600-608