Direct triplex loop-mediated isothermal amplification assay for the point-of-care molecular detection of Salmonella genus, subspecies I, and serovar Typhimurium

Food Control ◽  
2021 ◽  
Vol 120 ◽  
pp. 107504
Author(s):  
Mi-Ju Kim ◽  
Hyun-Joong Kim ◽  
Hae-Yeong Kim
2010 ◽  
Vol 170 (1-2) ◽  
pp. 90-93 ◽  
Author(s):  
Dung Tien Le ◽  
Osamu Netsu ◽  
Tamaki Uehara-Ichiki ◽  
Takumi Shimizu ◽  
Il-Ryong Choi ◽  
...  

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
J. García-Bernalt Diego ◽  
P. Fernández-Soto ◽  
B. Crego-Vicente ◽  
S. Alonso-Castrillejo ◽  
B. Febrer-Sendra ◽  
...  

Abstract Schistosomiasis is one of the most prevalent Neglected Tropical Disease, affecting approximately 250 million people worldwide. Schistosoma mansoni is the most important species causing human intestinal schistosomiasis. Despite significant efforts in recent decades, the global disease burden of schistosomiasis remains extremely high. This could partly be attributed to the absence of accurate diagnostic tools, primarily in endemic areas. Loop-mediated isothermal amplification (LAMP) is increasingly used in molecular diagnostics as a field-friendly alternative to many other complex molecular methods and it has been proposed as an ideal candidate for revolutionizing point-of-care molecular diagnostics. In a previous work, a LAMP-based method to detect S. mansoni DNA (SmMIT-LAMP) was developed by our research group for early diagnosis of active schistosomiasis in an experimental infection murine model. The SmMIT-LAMP has been further successfully evaluated in both human stool and snail samples and, recently, in human urine samples. In this study, we developed an important improvement for SmMIT-LAMP molecular assay, transforming it into a cold maintenance dry format suitable for potentially manufacturing as kit for ready-to-use for schistosomiasis diagnosis. This procedure could be applied to create dry LAMP kits for a laboratory setting and for diagnostic applications for other neglected tropical diseases.


2021 ◽  
Vol 19 (3) ◽  
pp. e30
Author(s):  
Jiyon Chu ◽  
Juyoun Shin ◽  
Shinseok Kang ◽  
Sun Shin ◽  
Yeun-Jun Chung

Salmonella species are among the major pathogens that cause foodborne illness outbreaks. In this study, we aimed to develop a loop-mediated isothermal amplification (LAMP) assay for the rapid and sensitive detection of Salmonella species. We designed LAMP primers targeting the hilA gene as a universal marker of Salmonella species. A total of seven Salmonella species strains and 11 non-Salmonella pathogen strains from eight different genera were used in this study. All Salmonella strains showed positive amplification signals with the Salmonella LAMP assay; however, there was no non-specific amplification signal for the non-Salmonella strains. The detection limit was 100 femtograms (20 copies per reaction), which was ~1,000 times more sensitive than the detection limits of the conventional polymerase chain reaction (PCR) assay (100 pg). The reaction time for a positive amplification signal was less than 20 minutes, which was less than one-third the time taken while using conventional PCR. In conclusion, our Salmonella LAMP assay accurately detected Salmonella species with a higher degree of sensitivity and greater rapidity than the conventional PCR assay, and it may be suitable for point-of-care testing in the field.


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