Dual recognition strategy and magnetic enrichment based lateral flow assay toward Salmonella enteritidis detection.

Dual recognition strategy and magnetic enrichment based lateral flow assay toward Salmonella enteritidis detection. Talanta. 2020 Jan 01;206:120204 Authors: Bu T, Yao X, Huang L, Dou L, Zhao B, Yang B, Li T, Wang J, Zhang D Abstract As a rapid and facile means for foodborne bacteria detection in situ, lateral flow immunoassay (LFA) still has intrinsic limitations in the construction of the existing sandwich LFA format, e.g. screening difficulties of paired antibodies (Abs), poor stability of Ab probe, etc. Here, combined the strong affinity of antibiotic with the superior specificity of antibody molecules, a novel and robust LFA based on a dual recognition strategy and magnetic separation was designed to achieve specific and sensitive determination of Salmonella enteritidis (S. enteritidis). In this work, ampicillin (Amp), a broad-spectrum antibiotic against bacteria, was employed as an ideal Ab replacer to anchor cells of target bacteria. By coating Amp on magnetite nanoparticles (MNPs), the Amp-MNPs showed remarkable binding, separation and enrichment capacities toward bacteria even under complex sample matrices. To ensure the selectivity of this protocol, anti-S. enteritidis monoclonal antibody was then adopted as the second anchoring agent to form a sandwich complex with Amp-MNPs. Based on these facts, S. enteritidis, as low as 102-103 CFU/mL, could be detected by naked eyes in food samples. Therefore, this creative antibiotic-bacteria-antibody LFA...
Source: Talanta - Category: Chemistry Authors: Tags: Talanta Source Type: research

Related Links:

ConclusionsWith this sequence, we provide the first complete and closed genome sequence of a SASd strain. With this study, we provide an important basis for an understanding of the genetic mechanism that underlie pathogenicity and host adaptation of SASd to sheep.
Source: Gut Pathogens - Category: Microbiology Source Type: research
Publication date: Available online 13 October 2019Source: MycoscienceAuthor(s): Katesaraporn Nuankeaw, Boonyanoot Chaiyosang, Thanapat Suebrasri, Somdej Kanokmedhakul, Saisaamorn Lumyong, Sophon BoonlueAbstractBioactive compounds of endophytic fungus Trichoderma polyalthiae were extracted from culture broth media. The crude extracts showed strong antimicrobial activity against human pathogens. Biologically active compounds were isolated and purified by chromatographic methods. The structures of the pure compounds were elucidated by spectroscopic methods. They were identified as Violaceol I and Violaceol II. These compounds...
Source: Mycoscience - Category: Biology Source Type: research
ConclusionThis investigation indicated that cocktail DNA vaccine encoded SAG1 gene of T. gondii and FliC can protect against acute toxoplasmosis.
Source: Biologicals - Category: Biology Source Type: research
Publication date: Available online 10 October 2019Source: Comparative Immunology, Microbiology and Infectious DiseasesAuthor(s): Bárbara Martín-Maldonado, Laura Montoro-Dasi, Maria Teresa Pérez-Gracia, Jaume Jordá, Santiago Vega, Francisco Marco-Jiménez, Clara MarinAbstractWild birds have repeatedly been found to be involved in the dissemination of enteric bacterial pathogens in the environment. The aim of this study was to determine the occurrence of Salmonella and Campylobacter as well as the antimicrobial resistance in wild Bonelli’s eagles nestlings in Eastern Spain. In addition...
Source: Comparative Immunology, Microbiology and Infectious Diseases - Category: Infectious Diseases Source Type: research
Publication date: Available online 10 October 2019Source: Comparative Immunology, Microbiology and Infectious DiseasesAuthor(s): Rasha M.A. Gharieb, Elshaima M. Fawzi, Ibrahim ElsohabyAbstractAntimicrobial resistance profile of E. coli and Salmonella serovars isolated from diarrheic calves and handlers in Egypt is unknown due to the absence of monitoring. Therefore, this study aimed to determine the virulence, genetic and antimicrobial resistance profiles of E. coli and Salmonella serovars associated with diarrhea in calves and handlers in intensive dairy farms in Egypt. A total of 36 bacterial strains (20 E. coli and 16 S...
Source: Comparative Immunology, Microbiology and Infectious Diseases - Category: Infectious Diseases Source Type: research
Publication date: Available online 10 October 2019Source: Comparative Immunology, Microbiology and Infectious DiseasesAuthor(s): Marc. K. Kouam, Herman M.F Biekop, Bridget Katte, Alexis TeguiaAbstractSalmonella infections in poultry farms are overlooked in many African countries; yet these infections are mostly zoonotic with impact on both poultry industry and public health. Considering the impact of Salmonella in laying hens, and the role of laying hens as a source of Salmonella outbreak in human, knowledge of the status of Salmonella on laying hen farms as well as the factors influencing the presence of Salmonella is imp...
Source: Comparative Immunology, Microbiology and Infectious Diseases - Category: Infectious Diseases Source Type: research
This study aimed to evaluate the effects of ginsenoside Rg3 (Rg3) on the adhesion, invasion, and intracellular survival of S. Typhimurium.MethodsThe impacts of Rg3 on bacterial growth and host cell viability were determined using the time kill and the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide assays, respectively. Gentamicin assay and confocal microscopic examination were undertaken to determine the effects of Rg3 on the adhesive and invasive abilities of S. Typhimurium to Caco-2 and RAW 264.7 cells. Quantitative reverse transcription polymerase chain reaction was performed to assess the expression o...
Source: Journal of Ginseng Research - Category: Complementary Medicine Source Type: research
Seven people have been hospitalized, but no deaths have been reported, the CDC said in an update about the ongoing investigation.
Source: WebMD Health - Category: Consumer Health News Source Type: news
Can you stand yet another Salmonella, ella, ella, ella, uh, oh, outbreak? This time it is Salmonella Oranienburg that has already sickened at least 21 people in 13 states.
Source: Forbes.com Healthcare News - Category: Pharmaceuticals Authors: Source Type: news
Beneficial Microbes, Ahead of Print.
Source: Beneficial Microbes - Category: Gastroenterology Authors: Source Type: research
More News: Chemistry | Eyes | Infectious Diseases | Nanotechnology | Salmonella