African Journal of
Food Science

  • Abbreviation: Afr. J. Food Sci.
  • Language: English
  • ISSN: 1996-0794
  • DOI: 10.5897/AJFS
  • Start Year: 2007
  • Published Articles: 836

Full Length Research Paper

Effect of storage temperatures on microbial load of some dates palm fruit sold in Saudi Arabia market

Mohammed S. Al Jasser
Department of Food Science and Nutrition, College of Agriculture and Food Sciences, King Saudi University, P. O. Box 2460, Riyadh-11451, Riyadh KSA,Saudi Arabia
Email: [email protected]

  • Article Number - CE3E65D24662
  • Vol.4(6), pp. 359 - 363 , June 2010
  •  Accepted: 25 May 2010
  •  Published: 30 June 2010

Abstract

 

Forty samples of four date palm fruit varieties (Rezizi, khlas, Sukri and Sefri) collected from date factories located in Riyadh and Al hasa regions in Saudi Arabia were examined for their total microbial load (Mesophilic aerobic count, Yeasts and Molds count, Spore-formers bacteria and Osmophilic yeast count). The effects of different storage temperatures (26, 4 and -19ºC) for six months on their microbial population were also examined. The results showed that the microbial load of the date palm fruit was mixture of bacteria, yeasts and molds. The microbial load of Khlas variety was higher than the other varieties, whereas, the Sukri variety had the lowest.The aerobic mesphilic bacteria of samples stored at -19˚C for 6 months decreased significantly (p < 0.05) while those stored at 4˚C were slightly decreased, however, those stored at 26˚C showed insignificant reduction. Theyeasts and molds, spore- formers bacteria and osmophilic yeast counts were significantly decreased at -19˚C storage compared to those stored at 26 and 4˚C.

 

Key words: Microbial load, storage temperature, dates palm fruit varieties.