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Babić M, Pajić M, Radinović M, Boboš S, Bulajić S, Nikolić A, Velebit B. Effects of Temperature Abuse on the Growth and Staphylococcal Enterotoxin A Gene (sea) Expression ofStaphylococcus aureusin Milk. Foodborne Pathog Dis 2019; 16:282-289. [DOI: 10.1089/fpd.2018.2544] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Affiliation(s)
- Milijana Babić
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
| | - Marija Pajić
- Faculty of Agriculture, University of Novi Sad, Novi Sad, Serbia
| | | | - Stanko Boboš
- Faculty of Agriculture, University of Novi Sad, Novi Sad, Serbia
| | - Snežana Bulajić
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
| | | | - Branko Velebit
- Institute of Meat Hygiene and Technology, Belgrade, Serbia
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Chiang YC, Wang HH, Ramireddy L, Chen HY, Shih CM, Lin CK, Tsen HY. Designing a biochip following multiplex polymerase chain reaction for the detection of Salmonella serovars Typhimurium, Enteritidis, Infantis, Hadar, and Virchow in poultry products. J Food Drug Anal 2017; 26:58-66. [PMID: 29389589 PMCID: PMC9332633 DOI: 10.1016/j.jfda.2016.11.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/03/2016] [Accepted: 11/21/2016] [Indexed: 11/29/2022] Open
Abstract
Salmonella-contaminated foods, especially poultry-derived foods (eggs, chicken meat), are the major source of salmonellosis. Not only in the European Union (EU), but also in the United States, Japan, and other countries, has salmonellosis been an issue of concern for food safety control agencies. In 2005, EU regulation 1003/2005 set a target for the control and reduction of five target Salmonella enterica serovars—S. Typhimurium, S. Enteritidis, S. Infantis, S. Hadar, and S. Virchow—in breeding flocks. Thus, a simple biochip for the rapid detection of any of these five Salmonella serovars in poultry products may be required. The objectives of this study were to design S. Virchow-specific primers and to develop a biochip for the simultaneous identification of all or any of these five Salmonella serovars in poultry and poultry products. Experimentally, we designed novel polymerase chain reaction (PCR) primers for the specific detection of S. Virchow, S. Infantis, and S. Hadar. The specificity of all these primers and two known primer sets for S. Typhimurium and S. Enteritidis was then confirmed under the same PCR conditions using 57 target strains and 112 nontarget Salmonella strains as well as 103 non-Salmonella strains. Following multiplex PCR, strains of any of these five Salmonella serovars could be detected by a chromogenic biochip deployed with DNA probes specific to these five Salmonella serovars. In comparison with the multiplex PCR methods, the biochip assay could improve the detection limit of each of the Salmonella serovars from N × 103 cfu/mL to N × 102 cfu/mL sample in either the pure culture or the chicken meat samples. With an 8-hour enrichment step, the detection limit could reach up to N × 100 cfu/mL.
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Affiliation(s)
- Yu-Cheng Chiang
- Department of Food Science and Technology, Hung Kuang University, Number 1018, Section 6, Taiwan Boulevard, Shalu District, Taichung City 43302, Taiwan, ROC.
| | - Hsien-Huang Wang
- DR. Chip Biotech, Science-Based Industrial Park, Chu-Nan, Miao-Li County 350, Taiwan, ROC
| | - Latha Ramireddy
- Department of Food Science and Technology, Hung Kuang University, Number 1018, Section 6, Taiwan Boulevard, Shalu District, Taichung City 43302, Taiwan, ROC
| | - Hsin-Yen Chen
- Department of Food Science and Technology, Hung Kuang University, Number 1018, Section 6, Taiwan Boulevard, Shalu District, Taichung City 43302, Taiwan, ROC
| | - Chia-Ming Shih
- Department of Food Science and Technology, Hung Kuang University, Number 1018, Section 6, Taiwan Boulevard, Shalu District, Taichung City 43302, Taiwan, ROC
| | - Chien-Ku Lin
- Department of Food Science and Technology, Hung Kuang University, Number 1018, Section 6, Taiwan Boulevard, Shalu District, Taichung City 43302, Taiwan, ROC
| | - Hau-Yang Tsen
- Department of Food Science and Technology, Hung Kuang University, Number 1018, Section 6, Taiwan Boulevard, Shalu District, Taichung City 43302, Taiwan, ROC.
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Comparison of LFA with PCR and RPLA in detecting SEB from isolated clinical strains of Staphylococcus aureus and its application in food samples. Food Chem 2013; 141:1789-95. [PMID: 23870892 DOI: 10.1016/j.foodchem.2013.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 09/26/2012] [Accepted: 05/02/2013] [Indexed: 11/24/2022]
Abstract
Three sensitive and specific assays, the lateral flow assay (LFA), polymerase chain reaction assay (PCR) and reversed passive latex agglutination assay (RPLA), were selected for detection of staphylococcal enterotoxin B (SEB) from 77 clinical Staphylococcus aureus strains isolated from humans. Analytical results revealed that the LFA has almost the same detection sensitivity as that of PCR and RPLA. The concordances between the 3 assays were as follows: LFA-PCR, 92.2%; LFA-RPLA, 94.8%; and PCR-RPLA, 97.4%. For further evaluation, the LFA was used for the detection of SEB in different food matrices. The assay was able to successfully identify SEB in a wide variety of food samples at levels as low as 10 ng/mL in less than 10 min. This study proved that the LFA is an excellent tool for detection of SEB both in isolated clinical S. aureus strains and in food specimens and may prove particularly important as an early warning tool to prevent food poisoning in consumers.
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Wong MY, Smart CD. A New Application Using a Chromogenic Assay in a Plant Pathogen DNA Macroarray Detection System. PLANT DISEASE 2012; 96:1365-1371. [PMID: 30727148 DOI: 10.1094/pdis-07-11-0593-sr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A DNA macroarray was previously developed to detect major fungal and oomycete pathogens of solanaceous crops. To provide a convenient alternative for researchers with no access to X-ray film-developing facilities, specific CCD cameras or Chemidoc XRS systems, a chromogenic detection method with sensitivity comparable with chemiluminescent detection, has been developed. A fungal (Stemphylium solani) and an oomycete (Phytophthora capsici) pathogen were used to develop the protocol using digoxigenin (DIG)-labeled targets. The internal transcribed spacer (ITS) region of the nuclear ribosomal DNA (rDNA), including ITS1, 5.8S rDNA, and ITS2, was used as the target gene and polymerase chain reaction amplified as in the previous protocol. Various amounts of species-specific oligonucleotides on the array, quantities of DIG-labeled ITS amplicon, and hybridization temperatures were tested. The optimal conditions for hybridization were 55°C for 2 h using at least 10 pmol of each species-specific oligonucleotide and labeled target at 10 ng/ml of hybridization buffer. Incubation of the hybridized array with anti-DIG conjugated alkaline phosphatase substrates, NBT/BCIP, produced visible target signals between 1 and 3 h compared with 1 h in chemiluminescent detection. Samples from pure cultures, soil, and artificially inoculated plants were also used to compare the detection using chemiluminescent and chromogenic methods. Chromogenic detection was shown to yield similar results compared with chemiluminescent detection in regard to signal specificity, duration of hybridization between the array and targets, and cost, though it takes 1 to 2 h longer for the visualization process, thus providing a convenient alternative for researchers who lack darkroom facilities. To our knowledge, this is the first report of DNA macroarray detection of plant pathogens using a chromogenic method.
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Affiliation(s)
- Mui-Yun Wong
- Department of Plant Protection, Faculty of Agriculture, and Institute of Tropical Agriculture, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
| | - Christine D Smart
- Department of Plant Pathology and Plant-Microbe Biology, Cornell University, Geneva, NY 14456
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Chiang YC, Lu HC, Li SC, Chang YH, Chen HY, Lin CW, Tsen HY. Development of PCR primers and a DNA macroarray for the simultaneous detection of major Staphylococcus species using groESL gene. Foodborne Pathog Dis 2012; 9:249-57. [PMID: 22300167 DOI: 10.1089/fpd.2011.1007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Staphylococcus spp., including S. aureus, S. intermedius, S. hyicus, S. epidermidis, S. saprophyticus, S. haemolyticus, S. xylosus, and S. carnosus, are major bacterial species associated with food poisoning, and human and veterinary clinics. Traditional methods for the identification of these staphylococci are time-consuming, laborious, or inaccurate. Therefore, rapid and accurate diagnostic methods are needed. In this study, we designed the DNA probes and polymerase chain reaction (PCR) primers for the detection of the aforementioned Staphylococcus species. These primers were proved to be specific for the detection of their corresponding target strains. Furthermore, by using a consensus primer pair, we were able to co-amplify the intergenic region of groES-groEL for these staphylococci. Followed by a chromogenic macroarray system with the specific probes on the plastic chips, these staphylococci in milk products or clinical samples could be simultaneously detected. When the system was used for the inspection of milk or urine samples containing N × 10⁰ target cells per milliliter of the sample, all these staphylococcal species could be identified after an 8-h pre-enrichment step. This system also allowed the adequate diagnosis of bacteremia, since N × 10⁰ target cells per milliliter of the blood samples could be detected after a 12-h pre-enrichment. Compared to the multiplex PCR method, this approach has the additional advantage that it allowed the discrimination of more bacterial strains-even some bacterial strains that may generate PCR products with the same molecular sizes.
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Affiliation(s)
- Yu-Cheng Chiang
- Department of Food Science and Technology, Hung Kuang University, Shalu, Taichung, Taiwan, ROC.
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Chiang YC, Tsen HY, Chen HY, Chang YH, Lin CK, Chen CY, Pai WY. Multiplex PCR and a chromogenic DNA macroarray for the detection of Listeria monocytogens, Staphylococcus aureus, Streptococcus agalactiae, Enterobacter sakazakii, Escherichia coli O157:H7, Vibrio parahaemolyticus, Salmonella spp. and Pseudomonas fluorescens in milk and meat samples. J Microbiol Methods 2012; 88:110-6. [DOI: 10.1016/j.mimet.2011.10.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 10/25/2011] [Accepted: 10/26/2011] [Indexed: 12/01/2022]
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Tang JN, Tang C, Wang Y, Chen J, Liu J, Liu L, Yue H. Surveillance study of enterotoxin genes in Staphylococcus aureus isolates from goats of different slaughterhouses in Sichuan, China. ANN MICROBIOL 2011. [DOI: 10.1007/s13213-011-0370-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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