Microbiological quality of kiwi cv ‘Hayward’ harvested in the Southeastern of Buenos Aires Province, Argentina

Authors

  • Ayelén Moreno Instituto de Innovación para el Desarrollo Agroalimentario y Agroenergético Sostenible (IIDEAGROS), Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Balcarce, Argentina
  • Claudia Castellari Instituto de Innovación para el Desarrollo Agroalimentario y Agroenergético Sostenible (IIDEAGROS), Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Balcarce, Argentina
  • Alejandra Yommi Instituto de Innovación para el Desarrollo Agroalimentario y Agroenergético Sostenible (IIDEAGROS), Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Balcarce, Argentina; Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Balcarce, Argentina
  • Sandra Médici Instituto de Innovación para el Desarrollo Agroalimentario y Agroenergético Sostenible (IIDEAGROS), Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Balcarce, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
  • María Alejandra Pereyra Instituto de Innovación para el Desarrollo Agroalimentario y Agroenergético Sostenible (IIDEAGROS), Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Balcarce, Argentina

DOI:

https://doi.org/10.24215/16699513e023

Keywords:

postharvest, storage, fruits, microbial counts, shelf life

Abstract

The surface of the kiwifruit (Actinidia deliciosa var. Hayward) presents a natural microbiota, which is altered by the agricultural practices applied by each producer at harvest time, transport, storage and packaging. The objectives of this work were to determine the total microbial load and the presence of pathogens (Escherichia coli O157: H7 and Salmonella spp.) in kiwifruit after harvesting and curing, in three different sites of General Pueyrredón, Province of Buenos Aires, Argentina; and to optimize the disinfection of the whole fruit with NaClO after cold storage. Total mesophilic aerobic bacteria (TMAB), filamentous fungi (FF) and yeast (Y) were quantified, and presence / absence of total coliforms (TC), E. coli O157: H7 and Salmonella spp was determined. Microbiota affecting quality and shelf life of the fruit (TMAB and FF) showed significant differences (p≤0.01) among plantations, being Batán the location where the highest content was found. All sites were negative for E. coli O157: H7 and Salmonella spp. A disinfection method with NaClO 300 ppm was selected to allow the reduction of the initial microbial load of TMAB, FF, Y and TC from fruit surface. The results showed environmental and human contamination generated at the end of harvest and curing of the kiwifruit in General Pueyrredón, and the selection of a simple method to reduce it. It is remarkable to highlight the absence of harmful pathogenic bacteria for consumers´ health.

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Published

2019-12-27

How to Cite

Moreno, A., Castellari, C., Yommi, A., Médici, S., & Pereyra, M. A. . (2019). Microbiological quality of kiwi cv ‘Hayward’ harvested in the Southeastern of Buenos Aires Province, Argentina. Journal of the Agronomy College, 118(2), 023. https://doi.org/10.24215/16699513e023