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Rojas-Pablo M, Toledo-Hernández E, Rodríguez-Barrera MA, Toribio-Jiménez J, Torreblanca-Ramírez C, Rosas-Guerrero VM, Salgado-Souto SA, Álvarez-Fitz P, Bolaños-Dircio A, Romero-Ramírez Y. Bacillus licheniformis M2-7 Decreases Ochratoxin A Concentrations in Coffee Beans During Storage. Curr Microbiol 2024; 81:62. [PMID: 38216774 DOI: 10.1007/s00284-023-03575-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 11/29/2023] [Indexed: 01/14/2024]
Abstract
Microbial contamination of coffee beans arises from various factors such as harvesting, handling, and storage practices, during which ochratoxin A (OTA)-producing fungi develop and proliferate. The presence of elevated concentrations of OTA poses a serious health risk to coffee consumers. Therefore, the implementation of a post-harvest treatment involving the use of bacteria known to antagonize OTA-producing fungi constitutes a safe alternative for reducing or eliminating the toxin's concentration in coffee beans. In this study, coffee beans (Coffea arabica L.) were inoculated with Bacillus licheniformis M2-7, after which we monitored fungal growth, in vitro antagonism, and OTA concentration. Our findings demonstrated that coffee beans inoculated with this bacterial strain exhibited a significant decrease in fungal populations belonging to the genera Aspergillus and Penicillium, which are known to produce OTA. Moreover, strain M2-7 decreased the growth rates of these fungi from 67.8% to 95.5% (P < 0.05). Similarly, inoculation with B. licheniformis strain M2-7 effectively reduced the OTA concentration from 24.35 ± 1.61 to 5.52 ± 1.69 µg/kg (P < 0.05) in stored coffee beans. These findings suggest that B. licheniformis M2-7 holds promise as a potential post-harvest treatment for coffee beans in storage, as it effectively inhibits the proliferation of OTA-producing fungi and lowers the toxin's concentration.
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Affiliation(s)
- María Rojas-Pablo
- Laboratorio de Microbiología Molecular y Biotecnología Ambiental, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, C. P. 39070, Chilpancingo, Guerrero, Mexico
| | - Erubiel Toledo-Hernández
- Laboratorio de Microbiología Molecular y Biotecnología Ambiental, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, C. P. 39070, Chilpancingo, Guerrero, Mexico
| | - Miguel A Rodríguez-Barrera
- Laboratorio de Microbiología Molecular y Biotecnología Ambiental, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, C. P. 39070, Chilpancingo, Guerrero, Mexico
| | - Jeiry Toribio-Jiménez
- Laboratorio de Microbiología Molecular y Biotecnología Ambiental, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, C. P. 39070, Chilpancingo, Guerrero, Mexico
| | | | - Víctor Manuel Rosas-Guerrero
- Facultad en Desarrollo Sustentable, Universidad Autónoma de Guerrero, C.P. 40900, Técpan de Galeana, Guerrero, Mexico
| | - Sergio Adrián Salgado-Souto
- Escuela Superior de Ciencias de la Tierra, Universidad Autónoma de Guerrero, C.P. 40323, Taxco el viejo, Guerrero, Mexico
| | - Patricia Álvarez-Fitz
- Facultad de Ciencias Químico-Biológicas, Laboratorio de Toxicología y Salud Ambiental, Universidad Autónoma de Guerrero, C. P. 39070, Chilpancingo, Guerrero, Mexico
| | - Alejandro Bolaños-Dircio
- Laboratorio de Microbiología Molecular y Biotecnología Ambiental, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, C. P. 39070, Chilpancingo, Guerrero, Mexico
| | - Yanet Romero-Ramírez
- Laboratorio de Microbiología Molecular y Biotecnología Ambiental, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, C. P. 39070, Chilpancingo, Guerrero, Mexico.
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Concentration of ochratoxin A in coffee products and probabilistic health risk assessment. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
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