Growth of Salmonella on sprouting alfalfa seeds as affected by the inoculum size, native microbial load and Pseudomonas fluorescens 2-79

Letters in Applied Microbiology
C-H Liao

Abstract

To investigate the growth of salmonellae on sprouting alfalfa seeds as affected by the inoculum size, microbial load and Pseudomonas fluorescens 2-79. Alfalfa seeds pre-inoculated with < or =10(1)-10(3) CFU g(-1) of salmonellae and with or without Ps. fluorescens 2-79 were sprouted in glass jars and the population of salmonellae were determined daily for up to 6 days. The population of salmonellae on germinating seeds reached the maximum 2-3 days after sprouting when total bacterial count reached the maximum (10(9) CFU g(-1)). The population of salmonellae on sprouting seeds not treated with Ps. fluorescens 2-79 showed a net increase of 3-4 log units. However, the population of salmonellae on alfalfa seeds treated with Ps. fluorescens 2-79 showed a net increase of only 1-2 log units. Disinfection of seeds with calcium hypochlorite enhanced the growth of salmonellae. Treatment of seeds with Ps. fluorescens 2-79 reduced the growth of salmonellae by 2-3 log units. The potential of Ps. fluorescens 2-79 as a biological agent for use in control of salmonellae on sprouting seeds was demonstrated and warrants further investigation.

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Citations

Mar 5, 2013·World Journal of Microbiology & Biotechnology·Hajo RijgersbergSeth-Oscar Tromp
Jul 24, 2014·Foodborne Pathogens and Disease·Qing Wang, Kalmia E Kniel
Dec 17, 2017·Applied and Environmental Microbiology·Andrée S GeorgeMax Teplitski
Jan 18, 2018·Risk Analysis : an Official Publication of the Society for Risk Analysis·Yuhuan ChenJane M Van Doren
Dec 3, 2013·Journal of Food Protection·Adi Md SikinSyed S H Rizvi

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