scholarly journals Isolation and Identification of Kidney-derived Pathogenic Escherichia coli from Red Panda (Ailurus fulgens)

2020 ◽  
Author(s):  
Songrui Liu ◽  
Yunli Li ◽  
Chanjuan Yue ◽  
Dongsheng Zhang ◽  
Xiaoyan Su ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bacterial Infection ◽  
Whole Genome Sequencing ◽  
Genome Sequencing ◽  
Ex Situ ◽  
Type I ◽  
Pathogenicity Test ◽  
Whole Genome ◽  
Red Panda ◽  
Ailurus Fulgens

Abstract Background Disease prevention and control is a significant part during the ex-situ conservation of the red panda (Ailurus fulgens) with bacterial infection being one of the important threats to the health of the captive population. So far, there was no systematic and detailed publications about the red panda-related E. coli disease. This study was conducted for the purpose of determining the cause of death, etiology and pathogenesis on a red panda through clinical symptoms, complete blood count, biochemical analysis, pathological diagnosis, antimicrobial susceptibility test, mouse pathogenicity test, and bacterial whole genome sequencing.Results A bacterial strain confirmed as Uropathogenic Escherichia coli (UPEC) was isolated from one captive dead red panda, which is resistant to most of the β-lactam drugs and a small number of aminoglycoside medications. The mouse pathogenicity test results showed the strains isolated postmortem from mice were the same as from the dead red panda, and the pathological findings were similar to the red panda while they were not completely the same. These pathological differences between red panda and mice may be related to the routes of infection and perhaps species differences and tolerance. The whole genome sequencing results showed that the isolated strain contained P pili, type I pili and iron uptake system related factors, which were closely related to its nephrotoxicity. Conclusion The red panda died of bacterial infection which was identified as Uropathogenic Escherichia coli. The pathogenic mechanisms of the strain are closely related to the expression of specific virulence genes.

scholarly journals Isolation and Characterization of Uropathogenic Escherichia coli (UPEC) from Red Panda (Ailurus fulgens)

2020 ◽  
Author(s):  
Songrui Liu ◽  
Yunli Li ◽  
Chanjuan Yue ◽  
Dongsheng Zhang ◽  
Xiaoyan Su ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bacterial Infection ◽  
Whole Genome Sequencing ◽  
Genome Sequencing ◽  
Virulence Factors ◽  
Ex Situ ◽  
Type I ◽  
Whole Genome ◽  
Red Panda ◽  
Ailurus Fulgens

Abstract BackgroundDisease prevention and control is a significant part in the ex-situ conservation of the endangered red panda (Ailurus fulgens), with bacterial infection being one of the most important health threats to the captive population. To date, studies about the Escherichia coli infection in the red panda are scarce. This study was conducted to determine the cause of death of a captive red panda through clinical symptoms, complete blood count, biochemical analysis, pathological diagnosis and bacterial whole genome sequencing.Case presentationOne 1.5 year old captive female red panda (Ailurus fulgens) was lethargic and anoretic. She was moved to the quarantine area for daily treatment of oral cefpodoxime proxetil 50mg. During this period, she did not eat or defecate, and died at 15:00 on November 21. Clinical examination revealed the values of neutrophils; alanine aminotransferase (ALT), aspartate aminotransferase (AST) and blood urea nitrogen (BUN) were significantly higher. Histological analysis demonstrated major pathological damage in the kidneys, liver and lungs, characterized by hyperemia, parenchymal cell degeneration and necrosis and inflammatory cell infiltration which was predominantly neutrophilic. A bacterial strain confirmed as Escherichia coli was isolated from the red panda post mortem. Whole-genome sequencing of the E. coli showed the complete sequences of the chromosome was 4.99 Mbp. PapA, PapG, OmpA, OmpU and other virulence factors were specific to Uropathogenic Escherichia coli (UPEC). Among the virulence factors, P pili, type I pili and related factors of the iron uptake system were associated with nephrotoxicity. ConclusionThe red panda died of bacterial infection caused by an Uropathogenic strain of Escherichia coli. The pathogenic mechanisms of the strain are closely related to the expression of specific virulence genes.

scholarly journals Isolation and characterization of Uropathogenic Escherichia coli (UPEC) from red panda (Ailurus fulgens)

2020 ◽  
Vol 16 (1) ◽  
Author(s):  
Songrui Liu ◽  
Yunli Li ◽  
Chanjuan Yue ◽  
Dongsheng Zhang ◽  
Xiaoyan Su ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bacterial Infection ◽  
Whole Genome Sequencing ◽  
Genome Sequencing ◽  
Virulence Factors ◽  
Ex Situ ◽  
Type I ◽  
Whole Genome ◽  
Red Panda ◽  
Ailurus Fulgens

Abstract Background Disease prevention and control is a significant part in the ex-situ conservation of the endangered red panda (Ailurus fulgens), being bacterial infection is one of the most important health threats to the captive population. To date, studies about the infection caused by Escherichia coli in the red panda are scarce. This study was conducted to determine the cause of death of a captive red panda through clinical symptoms, complete blood count, biochemical analysis, pathological diagnosis and bacterial whole genome sequencing. Case presentation The following report describes a case of a 1.5 year old captive red panda (Ailurus fulgens) that was found lethargic and anorectic. She was moved to the quarantine area for daily treatment with 50 mg of Cefpodoxime Proxetil. During the three-day treatment, she did not eat or defecate, and then died. Clinical hematology revealed the values of neutrophils, alanine aminotransferase (ALT), aspartate aminotransferase (AST) and blood urea nitrogen (BUN) were significantly higher. Histological analysis demonstrated major pathological damage in the kidneys, liver and lungs, characterized by hyperemia, parenchymal cell degeneration and necrosis and inflammatory cell infiltration which were predominantly neutrophilic. A bacterial strain confirmed as Escherichia coli was isolated post mortem. Whole genome sequencing of the E. coli showed the complete genome size was 4.99 Mbp. PapA, PapC, OmpA, OmpU and other virulence factors which specific to Uropathogenic Escherichia coli (UPEC) were found in the isolate. Among the virulence factors, P pili, type I pili and related factors of the iron uptake system were associated with nephrotoxicity. Conclusion The red panda died of bacterial infection caused by an uropathogenic strain of Escherichia coli. The pathogenic mechanisms of the strain are closely related to the expression of specific virulence genes.

scholarly journals Isolation and Characterization of Uropathogenic Escherichia coli (UPEC) from Red Panda (Ailurus fulgens)

2020 ◽  
Author(s):  
Songrui Liu ◽  
Yunli Li ◽  
Chanjuan Yue ◽  
Dongsheng Zhang ◽  
Xiaoyan Su ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bacterial Infection ◽  
Whole Genome Sequencing ◽  
Genome Sequencing ◽  
Virulence Factors ◽  
Ex Situ ◽  
Type I ◽  
Whole Genome ◽  
Red Panda ◽  
Ailurus Fulgens

Abstract Background Disease prevention and control is a significant part in the ex-situ conservation of the endangered red panda (Ailurus fulgens), being bacterial infection is one of the most important health threats to the captive population. To date, studies about the infection caused by Escherichia coli in the red panda are scarce. This study was conducted to determine the cause of death of a captive red panda through clinical symptoms, complete blood count, biochemical analysis, pathological diagnosis and bacterial whole genome sequencing.Case presentation The following report describes a case of a 1.5 year old captive red panda (Ailurus fulgens) that was found lethargic and anoretic. She was moved to the quarantine area for daily treatment with 50mg of cefpodoxime proxetil. During the three-day treatment, she did not eat or defecate, and then died. Clinical hematology revealed the values of neutrophils; alanine aminotransferase (ALT), aspartate aminotransferase (AST) and blood urea nitrogen (BUN) were significantly higher. Histological analysis demonstrated major pathological damage in the kidneys, liver and lungs, characterized by hyperemia, parenchymal cell degeneration and necrosis and inflammatory cell infiltration which were predominantly neutrophilic. A bacterial strain confirmed as Escherichia coli was isolated post mortem. Whole genome sequencing of the E. coli showed the complete genome size was 4.99 Mbp. PapA, PapG, OmpA, OmpU and other virulence factors which specific to Uropathogenic Escherichia coli (UPEC) were found in the isolate. Among the virulence factors, P pili, type I pili and related factors of the iron uptake system were associated with nephrotoxicity. Conclusion The red panda died of bacterial infection caused by an uropathogenic strain of Escherichia coli. The pathogenic mechanisms of the strain are closely related to the expression of specific virulence genes.

scholarly journals Isolation and Characterization of Uropathogenic Escherichia coli (UPEC) from Red Panda (Ailurus fulgens)

2020 ◽  
Author(s):  
Songrui Liu ◽  
Yunli Li ◽  
Chanjuan Yue ◽  
Dongsheng Zhang ◽  
Xiaoyan Su ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bacterial Infection ◽  
Whole Genome Sequencing ◽  
Genome Sequencing ◽  
Virulence Factors ◽  
Uropathogenic Escherichia Coli ◽  
Ex Situ ◽  
Whole Genome ◽  
Red Panda ◽  
Ailurus Fulgens

Abstract Background Disease prevention and control is a significant part in the ex-situ conservation of the endangered red panda (Ailurus fulgens), being bacterial infection is one of the most important health threats to the captive population. To date, studies about the infection caused by Escherichia coli in the red panda are scarce. This study was conducted to determine the cause of death of a captive red panda through clinical symptoms, complete blood count, biochemical analysis, pathological diagnosis and bacterial whole genome sequencing. Case presentation The following report describes a case of a 1.5 year old captive red panda (Ailurus fulgens) that was found lethargic and anorectic. She was moved to the quarantine area for daily treatment with 50mg of Cefpodoxime Proxetil. During the three-day treatment, she did not eat or defecate, and then died. Clinical hematology revealed the values of neutrophils, alanine aminotransferase (ALT), aspartate aminotransferase (AST) and blood urea nitrogen (BUN) were significantly higher. Histological analysis demonstrated major pathological damage in the kidneys, liver and lungs, characterized by hyperemia, parenchymal cell degeneration and necrosis and inflammatory cell infiltration which were predominantly neutrophilic. A bacterial strain confirmed as Escherichia coli was isolated post mortem. Whole genome sequencing of the E. coli showed the complete genome size was 4.99 Mbp. PapA, PapC, OmpA, OmpU and other virulence factors which specific to Uropathogenic Escherichia coli (UPEC) were found in the isolate. Among the virulence factors, P pili, type I pili and related factors of the iron uptake system were associated with nephrotoxicity. Conclusion The red panda died of bacterial infection caused by an uropathogenic strain of Escherichia coli. The pathogenic mechanisms of the strain are closely related to the expression of specific virulence genes.

scholarly journals Isolation and Characterization of Uropathogenic Escherichia coli (UPEC) from Red Panda (Ailurus fulgens)

2020 ◽  
Author(s):  
Songrui Liu ◽  
Yunli Li ◽  
Chanjuan Yue ◽  
Dongsheng Zhang ◽  
Xiaoyan Su ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Genome Sequencing ◽  
Virulence Factors ◽  
Uropathogenic Escherichia Coli ◽  
Pathogenicity Test ◽  
Whole Genome ◽  
Post Mortem ◽  
E Coli ◽  
Red Panda ◽  
Ailurus Fulgens

Abstract Background Disease prevention and control is a significant part of the ex-situ conservation of the endangered red panda (Ailurus fulgens), with bacterial infection being one important threat to the health of the captive population. To date, there are no systematic and detailed publications about E. coli-associated disease in red pandas. This study was conducted to determine the cause of death, etiology and pathogenesis in a captive red panda through clinical symptoms, complete blood count, biochemical analysis, pathological diagnosis, antimicrobial susceptibility test, mouse pathogenicity test, and bacterial whole genome sequencing. Results A bacterial strain confirmed as Escherichia coli ( E. coli ) was isolated from one captive red panda post mortem. This strain is resistant to most of the β-lactam antibiotics and a small number of aminoglycoside medications. The mouse pathogenicity test results showed that the strains isolated post mortem from mice were identical to that in the red panda, and the pathological findings were similar to those seen in the red panda. Whole-genome sequencing of the E. coli isolated from the red panda showed the complete sequences of the chromosome was 4.99 Mbp. PapA , PapG , OmpA , OmpU and other virulence factors were specific to Uropathogenic Escherichia coli (UPEC). Among the virulence factors, P pili, type I pili and iron uptake system related factors were associated with nephrotoxicity. Conclusion The red panda died of septicemic bacterial infection which was identified as Uropathogenic Escherichia coli . The pathogenic mechanisms of the strain are closely related to the expression of specific virulence genes.

scholarly journals Experimental evolution of gallium resistance in Escherichia coli

2019 ◽  
Vol 2019 (1) ◽  
pp. 169-180
Author(s):  
Joseph L Graves ◽  
Akamu J Ewunkem ◽  
Jason Ward ◽  
Constance Staley ◽  
Misty D Thomas ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Whole Genome Sequencing ◽  
Genome Sequencing ◽  
Experimental Evolution ◽  
Molecular Mechanisms ◽  
Gallium Nitrate ◽  
Whole Genome ◽  
Mechanisms Of Resistance ◽  
Genomic Changes ◽  
K 12

Abstract Background and Objectives Metallic antimicrobial materials are of growing interest due to their potential to control pathogenic and multidrug-resistant bacteria. Yet we do not know if utilizing these materials can lead to genetic adaptations that produce even more dangerous bacterial varieties. Methodology Here we utilize experimental evolution to produce strains of Escherichia coli K-12 MG1655 resistant to, the iron analog, gallium nitrate (Ga(NO3)3). Whole genome sequencing was utilized to determine genomic changes associated with gallium resistance. Computational modeling was utilized to propose potential molecular mechanisms of resistance. Results By day 10 of evolution, increased gallium resistance was evident in populations cultured in medium containing a sublethal concentration of gallium. Furthermore, these populations showed increased resistance to ionic silver and iron (III), but not iron (II) and no increase in traditional antibiotic resistance compared with controls and the ancestral strain. In contrast, the control populations showed increased resistance to rifampicin relative to the gallium-resistant and ancestral population. Genomic analysis identified hard selective sweeps of mutations in several genes in the gallium (III)-resistant lines including: fecA (iron citrate outer membrane transporter), insl1 (IS30 tranposase) one intergenic mutations arsC →/→ yhiS; (arsenate reductase/pseudogene) and in one pseudogene yedN ←; (iapH/yopM family). Two additional significant intergenic polymorphisms were found at frequencies > 0.500 in fepD ←/→ entS (iron-enterobactin transporter subunit/enterobactin exporter, iron-regulated) and yfgF ←/→ yfgG (cyclic-di-GMP phosphodiesterase, anaerobic/uncharacterized protein). The control populations displayed mutations in the rpoB gene, a gene associated with rifampicin resistance. Conclusions This study corroborates recent results observed in experiments utilizing pathogenic Pseudomonas strains that also showed that Gram-negative bacteria can rapidly evolve resistance to an atom that mimics an essential micronutrient and shows the pleiotropic consequences associated with this adaptation. Lay summary We utilize experimental evolution to produce strains of Escherichia coli K-12 MG1655 resistant to, the iron analog, gallium nitrate (Ga(NO3)3). Whole genome sequencing was utilized to determine genomic changes associated with gallium resistance. Computational modeling was utilized to propose potential molecular mechanisms of resistance.

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