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Direct Research Journals
Direct Research Journal of Biology and Biotechnology (DRJBB):Vol. 3 (4), pp. 60-66, September 2017
ISSN: 4372-2608

Evaluation of the Microorganisms Associated with Untreated and Salt-Treated Ogi (Corn Caramel) Stored at Room Temperature
Article Number: DRJA17315669
DOI: https://doi.org/10.26765/DRJBB.2017.5669

Original Research Article


*Akin-Osanaiye, B. C. and T. F. Oladele


Department of Microbiology, Faculty of Science, University of Abuja, Abuja. Nigeria.

*Corresponding author E-mail: tou_femi@yahoo.com.


date Received: August 10, 2017     date Accepted: September 19, 2017     date Published: September 25, 2017

Abstract

This present research is centred on evaluation of the microorganisms associated with salt-treated and untreated corn caramel  (Ogi/Akamu) kept at room temperature (28 ±2) °C for two weeks using standard techniques. The purchased ogi was stored in the Microbiology laboratory at ambient temperature and treated with different concentrations of cooking salt. The identified microbial isolates were: Lactobacillus sp, Bacillus sp Micrococcus sp, Staphylococcus sp, Aspergillus sp, Rhizopus sp, Fusarium sp and Saccharomyces sp. The analyses showed that Ogi 1 had higher total viable counts for both bacteria and fungi than Ogi 2. The bacterial counts ranged from   3.3 x 105 – 1.75 x 107 cfu/g while the fungal counts ranged from 3.3 × 105 – 7.4 ×106 cfu/g in the untreated samples. The same bacterial and fungal genera found in Ogi 1 and Ogi 2 were identified in the salt-treated samples (Ogi 3 and Ogi 4) but there was a significant decrease in the microbial load in samples treated with 0.5 g salt and only Bacillus sp and Staphylococcus sp were isolated in the treated samples. Bacillus subtilis was the most frequently occurring bacterial isolate (47%) while the least occurring was Micrococcus sp (23%) and the most frequently occurring fungal isolate was Saccharomyces sp (50%) while Fusarium and Aspergillus were the least occurring fungal isolate. The results of this research have shown that cooking salt can serve as an inexpensive material for extending the shelf-life of Ogi.


Key words: Ogi, corn caramel, room temperature, supernatant, salt- treatment, preservation.