Competitive growth of post-harvest fruit rot fungi on survival of Salmonellae on mangoes.
Tussaporn N., Mahakarnchanakul W., Sajjaanantakul T.
Author Affiliation: Department of Food Science and Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand.
: 355-362
Abstract : The effect of competitive growth of postharvest fruit rot fungi, i.e. Alternaria sp. (Al), Aspergillus niger (An), Colletotrichum gloeosporioides [Glomerella cingulata] (C), Fusarium oxysporum (F), Pestalotiopsis sp. (Pe) and Phomopsis sp. (Ph) on the survival of 5-serotype mixture of Salmonella enterica at ambient temperature (30±2°C) and chilling temperature (15±1°C) in mango wounds was investigated. S. enterica could survive in mangoes during the storage period (9 days) at both temperatures. The growth of S. enterica co-inoculated with Al increased slightly at 30°C, similar to the pattern of pH increased of mango pulp. Co-inoculation of S. enterica with C, F, Pe and Ph decreased the S. enterica cells and pH of mango pulp. Competition of As decreased the growth of S. enterica rapidly, which could not be detected on day 5 of storage. At 15°C, the growth of S. enterica with Al, C, F, Pe and Ph slightly increased, similar to the change of pH of mango pulp. S. enterica co-inoculated with As also survived during the storage period at chilling temperature.