Detection of Staphylococcus aureus Enterotoxin A (SEA) Using Dot-ELISA in Milk Samples
| Autor: | Haniyeh Golafrouz, Hamed Ahari, Seyed Amirali Anvar, Delavar Shahbazzadeh |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Journal of Medical Microbiology and Infectious Diseases, Vol 8, Iss 4, Pp 132-136 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2345-5349 2345-5330 |
| Popis: | Introduction: Staphylococcus aureus enterotoxin A (SEA) is one of the most common causes of staphylococcal food poisoning. Due to the simplicity and no requirement for laboratory apparatuses, dot-ELISA is a choice method for detecting Staphylococcal enterotoxins. The present study aimed to develop a dot-ELISA for the detection of SEA. Methods: Nitrocellulose membranes were coated with the SEA antibody and blocked by the addition of 3% bovine serum albumin (BSA) blocking buffer. After 1 h incubation and washing the membranes, milk samples and the positive control (SEA, 50 ng/ml) were added to the membranes and incubated for 1 h. The membranes were then washed and incubated for 45 min with HRP-conjugated SEA, followed by the addition of TMB. Results: Our dot-ELISA could detect amounts of ≥ 50 ng/ml of SEA in the milk samples. Of the 30 raw milk samples randomly purchased from dairy product stores in District 3, Tehran, 5 (16%) contained SEA ≥ 50 ng/ml by the dot-ELISA. Conclusion: The dot-ELISA showed to be a reliable method for the preliminary screening of milk samples for SEA contamination. This method is cost-effective, fast, and does not require an ELISA-reader device. |
| Databáze: | Directory of Open Access Journals |
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