Bactericidal activity of lemon juice and lemon derivatives against Vibrio cholerae
| Autor: | Olga M. de Nader, Clara Silva de Ruiz, Olga A. de Saab, Marta C. de Castillo, Aida Pece De Ruiz Holgado, Norma P. de Fernandez, Rosa Cangemi de Gutierrez, C. Allori |
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| Rok vydání: | 2000 |
| Předmět: |
Biocide
Citrus Time Factors Serial dilution Colony Count Microbial Pharmaceutical Science Microbial Sensitivity Tests Biology medicine.disease_cause law.invention Microbiology law Vibrionaceae medicine Vibrio cholerae Essential oil Antibacterial agent Pharmacology Colony-forming unit Plant Extracts General Medicine biology.organism_classification medicine.disease Cholera Anti-Bacterial Agents Culture Media |
| Zdroj: | Biologicalpharmaceutical bulletin. 23(10) |
| ISSN: | 0918-6158 |
| Popis: | Food products can be possible vectors of the agent responsible for cholera epidemics, because some of these products allow Vibrio cholerae O1 to develop to concentrations above the dangerous level. This study deals with the behaviour of essential oils, natural and concentrated lemon juice and fresh and dehydrated lemon peel against V. cholerae O1 biotype Eltor serotype Inaba tox+. Our aim was to evaluate whether these products, used at different dilutions, exhibit bactericidal or bacteriostatic activity against the microorganism, when present at concentrations of 10(2), 10(4), 10(6) and 10(8) colony forming units (CFU) ml(-1), and after different exposure times. 10(8) CFU ml(-1) was considered an infectious dose. Concentrated lemon juice and essential oils inhibited V. cholerae completely at all studied dilutions and exposure times. Fresh lemon peel and dehydrated lemon peel partially inhibited growth of V. cholerae. Freshly squeezed lemon juice, diluted to 10(-2), showed complete inhibition of V. cholerae at a concentration of 10(8) CFU ml(-1) after 5 min of exposure time; a dilution of 2 x 10(-3) produced inhibition after 15 min and a dilution of 10(-3) after 30 min. It can be concluded that lemon, a natural product which is easily obtained, acts as a biocide against V. cholerae, and is, therefore, an efficient decontaminant, harmless to humans. |
| Databáze: | OpenAIRE |
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