Microbiology quality, detection of enterotoxin genes and antimicrobial resistance of Staphylococcus aureus isolated from milk and Coalho cheese
This study evaluated the microbiological quality of milk and Coalho cheese, the prevalence of enterotoxin genes, antimicrobial resistance and determined an inducible MLSB resistance phenotype by the D-test in strains of Staphylococcus aureus isolated from these products. Seventy samples of milk and...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Londrina
2018-08-01
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| Series: | Semina: Ciências Agrárias |
| Subjects: | |
| Online Access: | http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/31787 |
| _version_ | 1818516566322446336 |
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| author | Cecília Teresa Muniz Pereira Diêgo Sávio Vasconcelos de Oliveira Vanessa Solano Veloso Sabina dos Santos Paulino Silva Leidiane Sousa Santos Anísio Ferreira Lima Neto Felipe Araújo de Alcantara Oliveira Maria Celeste Nunes de Melo Maria José dos Santos Soares |
| author_facet | Cecília Teresa Muniz Pereira Diêgo Sávio Vasconcelos de Oliveira Vanessa Solano Veloso Sabina dos Santos Paulino Silva Leidiane Sousa Santos Anísio Ferreira Lima Neto Felipe Araújo de Alcantara Oliveira Maria Celeste Nunes de Melo Maria José dos Santos Soares |
| author_sort | Cecília Teresa Muniz Pereira |
| collection | DOAJ |
| description | This study evaluated the microbiological quality of milk and Coalho cheese, the prevalence of enterotoxin genes, antimicrobial resistance and determined an inducible MLSB resistance phenotype by the D-test in strains of Staphylococcus aureus isolated from these products. Seventy samples of milk and Coalho cheese were analyzed. S. aureus strains were identified by biochemical tests. The presence of se genes (sea-see) was tested by polymerase chain reaction. The antimicrobial sensitivity of S. aureus strains was evaluated for 13 antimicrobial drugs using the disk diffusion technique and the double-disk diffusion test (D-test) was performed to determine inducible resistance to lincosamide phenotype. The amount of toxin sufficient to cause foodborne diseases is generally observed when Staphylococcus populations exceed 105 CFU mL-1 g-1. In this study, none of the milk samples analyzed showed these counts; however, 73.3% (22/30) of Coalho cheese samples exceeded this value. A total of 109 isolates were identified as S. aureus. The presence of enterotoxin genes was detected in 25.7% of these isolates and amplified only for the sec gene. Most of the isolates (78.5%) were resistant to one or more antimicrobial agents. The D test showed that 25.0% of erythromycin-resistant isolates had the constitutive resistance phenotype, and 3.8% had the inducible resistance phenotype to clindamycin. These results indicate that these dairy products represent a health risk since these bacteria can cause foodborne diseases or may be a possible route for the transfer of antimicrobial resistance to humans. |
| first_indexed | 2024-12-11T00:44:02Z |
| format | Article |
| id | doaj.art-5dd944f5cf4a4e859c4156feb3d7ce26 |
| institution | Directory Open Access Journal |
| issn | 1676-546X 1679-0359 |
| language | English |
| last_indexed | 2024-12-11T00:44:02Z |
| publishDate | 2018-08-01 |
| publisher | Universidade Estadual de Londrina |
| record_format | Article |
| series | Semina: Ciências Agrárias |
| spelling | doaj.art-5dd944f5cf4a4e859c4156feb3d7ce262022-12-22T01:26:50ZengUniversidade Estadual de LondrinaSemina: Ciências Agrárias1676-546X1679-03592018-08-013951957196810.5433/1679-0359.2018v39n5p195717717Microbiology quality, detection of enterotoxin genes and antimicrobial resistance of Staphylococcus aureus isolated from milk and Coalho cheeseCecília Teresa Muniz Pereira0Diêgo Sávio Vasconcelos de Oliveira1Vanessa Solano Veloso2Sabina dos Santos Paulino Silva3Leidiane Sousa Santos4Anísio Ferreira Lima Neto5Felipe Araújo de Alcantara Oliveira6Maria Celeste Nunes de Melo7Maria José dos Santos Soares8Universidade Federal do PiauíUniversidade Federal do PiauíUniversidade Federal do PiauíUniversidade Federal do Rio Grande do NorteUniversidade Federal do PiauíPesquisador da Empresa Brasileira de Pesquisa AgropecuáriaUniversidade Federal do PiauíUniversidade Federal do Rio Grande do NorteUniversidade Federal do PiauíThis study evaluated the microbiological quality of milk and Coalho cheese, the prevalence of enterotoxin genes, antimicrobial resistance and determined an inducible MLSB resistance phenotype by the D-test in strains of Staphylococcus aureus isolated from these products. Seventy samples of milk and Coalho cheese were analyzed. S. aureus strains were identified by biochemical tests. The presence of se genes (sea-see) was tested by polymerase chain reaction. The antimicrobial sensitivity of S. aureus strains was evaluated for 13 antimicrobial drugs using the disk diffusion technique and the double-disk diffusion test (D-test) was performed to determine inducible resistance to lincosamide phenotype. The amount of toxin sufficient to cause foodborne diseases is generally observed when Staphylococcus populations exceed 105 CFU mL-1 g-1. In this study, none of the milk samples analyzed showed these counts; however, 73.3% (22/30) of Coalho cheese samples exceeded this value. A total of 109 isolates were identified as S. aureus. The presence of enterotoxin genes was detected in 25.7% of these isolates and amplified only for the sec gene. Most of the isolates (78.5%) were resistant to one or more antimicrobial agents. The D test showed that 25.0% of erythromycin-resistant isolates had the constitutive resistance phenotype, and 3.8% had the inducible resistance phenotype to clindamycin. These results indicate that these dairy products represent a health risk since these bacteria can cause foodborne diseases or may be a possible route for the transfer of antimicrobial resistance to humans.http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/31787Antimicrobial resistanceDairy productsCoalho cheeseStaphylococcal enterotoxins genesStaphylococcus aureus. |
| spellingShingle | Cecília Teresa Muniz Pereira Diêgo Sávio Vasconcelos de Oliveira Vanessa Solano Veloso Sabina dos Santos Paulino Silva Leidiane Sousa Santos Anísio Ferreira Lima Neto Felipe Araújo de Alcantara Oliveira Maria Celeste Nunes de Melo Maria José dos Santos Soares Microbiology quality, detection of enterotoxin genes and antimicrobial resistance of Staphylococcus aureus isolated from milk and Coalho cheese Semina: Ciências Agrárias Antimicrobial resistance Dairy products Coalho cheese Staphylococcal enterotoxins genes Staphylococcus aureus. |
| title | Microbiology quality, detection of enterotoxin genes and antimicrobial resistance of Staphylococcus aureus isolated from milk and Coalho cheese |
| title_full | Microbiology quality, detection of enterotoxin genes and antimicrobial resistance of Staphylococcus aureus isolated from milk and Coalho cheese |
| title_fullStr | Microbiology quality, detection of enterotoxin genes and antimicrobial resistance of Staphylococcus aureus isolated from milk and Coalho cheese |
| title_full_unstemmed | Microbiology quality, detection of enterotoxin genes and antimicrobial resistance of Staphylococcus aureus isolated from milk and Coalho cheese |
| title_short | Microbiology quality, detection of enterotoxin genes and antimicrobial resistance of Staphylococcus aureus isolated from milk and Coalho cheese |
| title_sort | microbiology quality detection of enterotoxin genes and antimicrobial resistance of staphylococcus aureus isolated from milk and coalho cheese |
| topic | Antimicrobial resistance Dairy products Coalho cheese Staphylococcal enterotoxins genes Staphylococcus aureus. |
| url | http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/31787 |
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