Pathogenic features of urinary Escherichia coli strains causing asymptomatic bacteriuria during pregnancy

Eghbalpoor, Fatemeh; Vahdat, Sahar; Shahbazi, Razieh; Mohebi, Samane; Kholdi, Soudeh; Hadadi, Mahtab; Javadi, Kasra; Hashemizadeh, Zahra; Motamedifar, Mohammad

doi:10.1016/j.genrep.2022.101559

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…The activities of AST and ALT were determined as described previously for the determination of AKP activity. The activities of AST and ALT in the supernatants were assessed using the AST and ALT Kit purchased from Nanjing Jiancheng Bioengineering Institute (Nanjing, China) according to the manufacturer's instructions 15 .…”

Section: Methodsmentioning

confidence: 99%

The mechanism of whey protein and blueberry juice mixed system fermented with Lactobacillus inhibiting Escherichia coli during storage

Qian

Gui-bing

Wang

et al. 2023

Sci Rep

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The aim of this study was to identify the antimicrobial effect and mechanism of whey protein and blueberry juice mixed systems fermented with Lactobacillus against Escherichia coli during storage. The whey protein and blueberry juice mixed systems were fermented with L. casei M54, L. plantarum 67, S. thermophiles 99 and L. bulgaricus 134 and had different antibacterial activities against E. coli during storage. The antimicrobial activity of the mixed whey protein and blueberry juice mixture systems was the highest, with an inhibition zone diameter of approximately 230 mm, compared with the whey protein or blueberry juice systems alone. There were no viable E. coli cells 7 h after treatment with of the whey protein and blueberry juice mixed systems as determined by survival curve analysis. Analysis of the inhibitory mechanism showed that the release of alkaline phosphatase, electrical conductivity, protein and pyruvic acid contents, and aspartic acid transaminase and alanine aminotransferase activity in E. coli increased. These results demonstrated that these mixed systems fermented with Lactobacillus, especially those containing blueberries, could inhibit the growth of E. coli and even cause cell death by destroying the cell membrane and cell wall.

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Section: Methodsmentioning

confidence: 99%

The mechanism of whey protein and blueberry juice mixed system fermented with Lactobacillus inhibiting Escherichia coli during storage

Qian

Gui-bing

Wang

et al. 2023

Sci Rep

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show abstract

“…The activity of AST and ALT in the supernatants was assessed using the AST and ALT Kit purchased from Nanjing Jiancheng Bioengineering Institute (Nanjing, China). The activity of AST and ALT were measured using the kits with the manufacturer's instructions [14] .…”

Section: Determination Of the Activity Of Ast And Altmentioning

confidence: 99%

The inhibition mechanism of Lactobacillus fermented whey protein and blueberry juice mixture system against Escherichia coli during storage

Qian

Gui-bing

Wang

et al. 2022

Preprint

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This study aimed to identify the antimicrobial effect and mechanism of whey protein and blueberry juice mixture system using lactobacillus fermentation against Escherichia coli during storage. The whey protein and blueberry juice mixture systems using Lactobacillus casei M54, Lactobacillus plantarum 67, Streptococcus thermophiles 99 or Lactobacillus bulgaricus 134 had different antibacterial activity against E. coli during storage. The antimicrobial activity of whey protein and blueberry juice mixture fermentation systems was the highest with inhibition zone diameter of about 230 mm compared with the whey protein or blueberry juice fermentation alone. There was no viable E. coli cells after 7 h with the treatment of whey protein and blueberry juice mixture systems by survival curve analysis. The inhibitory mechanism analysis showed that the release of alkaline phosphatase (AKP), electrical conductivity, protein content, aspartic acid transaminase (AST), alanine aminotransferase (ALT) and pyruvic acid content on E. coli had increased. These results demonstrated that these mixture fermentation systems especially containing blueberry could inhibit the growth of E. coli and even cause cells death by destroying the cell the membrane and cell wall.

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Health profile of pregnant women with asymptomatic bacteriuria

El Sayed Ezz,

El Hamed,

Nabil Aboushady

et al. 2023

Egyptian Nursing Journal

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Background Urinary tract infections (UTIs) are the most common bacterial infection during pregnancy. UTIs in pregnancy are associated with maternal as well as fetal morbidity. The aim of the current study was to assess the health profile of pregnant women with asymptomatic bacteriuria (ASB). Design A descriptive research design was adopted to obtain the stated aim. Sample A purposive sample of pregnant women with UTIs without symptoms throughout 1 year but the sample not less than 100 pregnant women was recruited. Setting The study was performed at woman's care clinic at Al Kasr Al Ainy University Hospital. Tools Two tools were utilized: (a) urine analysis record and (b) structured interviewing questionnaire schedule. Results The study findings showed that the mean age of the pregnant women with ASB was 29.00±5.48 years old. Overall, 26% of them could not read and write, and 96% of them were housewives. Regarding place of residence, 82% of the selected sample was from rural areas. Half of the selected sample was multigravida, whereas 55% of them were multipara. Overall, 61% of them had a history of abortion. Furthermore, 86% of the selected sample used new latrine toilet, and 61% had a previous history regarding infection. In addition, 63% of the selected sample used contraceptive methods, and 58% of them had previous normal vaginal delivery. Concerning trimester, 73% were in the third trimester. Conclusion The current study's findings revealed that age, cannot read and write, rural areas, housewives, usage of new latrine toilet, multigravida, multipara, history of abortion, normal vaginal delivery, usage of contraceptive methods, history of previous infection, and third trimester were represented the health profile of the pregnant women with ASB that might increase the incidence of a symptomatic bacteriuria infection. Recommendation Pregnant women should be made aware regarding personal hygiene through classes on motherhood.

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Pathogenic features of urinary Escherichia coli strains causing asymptomatic bacteriuria during pregnancy

Cited by 5 publications

References 28 publications

The mechanism of whey protein and blueberry juice mixed system fermented with Lactobacillus inhibiting Escherichia coli during storage

The mechanism of whey protein and blueberry juice mixed system fermented with Lactobacillus inhibiting Escherichia coli during storage

The inhibition mechanism of Lactobacillus fermented whey protein and blueberry juice mixture system against Escherichia coli during storage

Health profile of pregnant women with asymptomatic bacteriuria

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