Adsorption and antibacterial effect of copper-exchanged montmorillonite on Escherichia coli K88

Hu, Caihong; Xia, Meisheng

doi:10.1016/j.clay.2005.10.010

Cited by 151 publications

(104 citation statements)

References 15 publications

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“…This resistance has become a more serious problem in recent years (Stahl et al, 2004). Because of the abuse of antibiotics, it is essential to find effective replacements that do not confer resistance (Hu and Xia, 2006 phyllosilicates. This mineral has a three-layer inverted structure, and iron commonly substitutes for aluminum and magnesium in the octahedral layer (Liu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Copper-modified palygorskite is effective in preventing and treating diarrhea caused by Salmonella typhimurium

Yao

et al. 2017

J. Zhejiang Univ. Sci. B

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Abstract:The aim of this research was to develop effective alternative therapies to reduce antibiotic use in animal agriculture. In this study, the efficacy of copper-modified palygorskite (CM-Pal) in preventing diarrhea caused by Salmonella was specifically examined both in vitro and in vivo. The CM-Pal was prepared with palygorskite (Pal) and copper nitrate. The antibacterial activity of the CM-Pal was detected by comparing the differences in cell numbers on plate count agar before and after adding the CM-Pal to Salmonella typhimurium cultures. Seventy ICR mice were then allocated into seven groups. Five groups (the treatment groups) were infected with S. typhimurium by intraperitoneal (i.p.) injection and were given Pal, CM-Pal, montmorillonite powder, gentamicin, and physiological saline, respectively. One group (the prevention group) was given CM-Pal before infection with S. typhimurium. Another group (the uninfected group) was not infected with S. typhimurium. The effects of Pal, CM-Pal, montmorillonite powder, and gentamicin on the treatment or prevention of diarrhea in the mice were examined by stool studies, fecal scoring, and assessment of growth performance and villus height. The CM-Pal had satisfactory anti-bacterial properties in vitro: the antibacterial rate was 100% after 2 h incubation with S. typhimurium NJS1 cultures (1×10 6 colony-forming units (CFU)/ml). In the in vivo experiment, the CM-Pal exerted superior effects in the treatment and prevention of diarrhea in mice compared with Pal, montmorillonite powder, and gentamicin. In the CM-Pal group, no mice showed signs of diarrhea at 24 h post infection (p.i.), and all mice fully recovered from infection. However, the Pal group, montmorillonite group, and gentamicin group only recovered after 48, 48, and 96 h, respectively. The villus height level in the CM-Pal treatment group recovered at 3 d p.i. However, the recovery time of the other groups was longer (at least 5 d). The CM-Pal prevention group had a better effect on weight gain than the other groups. This study suggested that CM-Pal may be an effective alternative to conventional antibiotics for the treatment and prevention of animal diarrhea caused by Salmonella.

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Section: Introductionmentioning

confidence: 99%

“…Copper has seen widespread use in the preparation of antibacterial materials (Faundez et al, 2004;Kanhed et al, 2014). Copperexchanged montmorillonite has antibacterial activity against Escherichia coli K88, and leads to improved growth performance and a decreased incidence of diarrhea in pigs Zhou et al, 2004;Hu and Xia, 2006).…”

Section: Introductionmentioning

confidence: 99%

Copper-modified palygorskite is effective in preventing and treating diarrhea caused by Salmonella typhimurium

Yao

et al. 2017

J. Zhejiang Univ. Sci. B

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“…The dispersion holed at 60 °C for 6 h, stirringly. After filtration, the residue cleaned with distilled water to adjust pH value in 5.6, dried at 80 °C overnight (16). Ag exchanged cloisite 30B was obtained similar to the above procedure, 0.02 mol/L AgNO 3 solution was used instead of CuSO 4 solution.…”

Section: Methodsmentioning

confidence: 99%

Inhibition of Coliform Bacteria in Ultra-Filtrated Cheese Packed in Nanocomposite Films Containing Cloisite30B- Metal Nanoparticles

2018

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A B S T R A C TBackground and Objectives: Antimicrobial active packaging with metallic nanoparticles is used as antimicrobial agent in the packaging of food. This study considers the coliform retarding ability of antimicrobial packaging in ultra-filtrated (UF) cheese. Materials and Methods:Plastic films based on low-density polyethylene containing organoclay (cloisite 30B) and different percentages of Ag and CuO nanoparticles produced by extrusion method. Coliform bacteria growth in UF cheese was investigated. The release of nanoparticles from nanocomposite into a food simulant was also assessed.Results: An amount of 3.17-log cfu/g and 0.75-log cfu/g reduction for coliform bacteria obtained for nanocomposite and control films, respectively after four weeks of storage at 4 °C. Nanocomposite film with 1.3% Ag and 2.7% CuO in LDPE matrix introduced as optimum point by Design Expert 7.1.5 software. Microbial model for decreasing growth of coliform bacteria in this product was also determined. Validation of optimum point was carried out using a one-way ANOVA. It was shown that ther is a non-significant (p>0.05) difference with its repeat and a significant (p<0.05) difference with the pure film. Conclusions:Plastic nanocomposite films containing nanoparticle of organoclay and metal can decrease the severity of food processing and application of chemical preservatives in the food industries.

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“…Montmorillonites display big certain surface area as well as colloid qualities and substantial cation exchange capability, which provide rise to the best possible adsorbents of inorganic and organic materials. Metal ion exchanged montmorillonite dispersed within aqueous solution has proven to appeal to germs by fluoromicas, montmorillonites, and electrostatic forces [3]. Furthermore intercalated with organic and natural ingredients with antibacterial consequences including cetylpyridinium, cetyltrimethylammonium, norfloxacin tetracyclines happen to be additionally analyzed.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Stress Induced by Organo Sliver Clay Particles in Mice

2017

IJSR

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Adsorption and antibacterial effect of copper-exchanged montmorillonite on Escherichia coli K88

Cited by 151 publications

References 15 publications

Copper-modified palygorskite is effective in preventing and treating diarrhea caused by Salmonella typhimurium

Copper-modified palygorskite is effective in preventing and treating diarrhea caused by Salmonella typhimurium

Inhibition of Coliform Bacteria in Ultra-Filtrated Cheese Packed in Nanocomposite Films Containing Cloisite30B- Metal Nanoparticles

Oxidative Stress Induced by Organo Sliver Clay Particles in Mice

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