Quantitative characterization of microbial load in wild-harvested edible insects of Nagaland, India

Aim: To analyze the microbial load in raw and roasted insects in an attempt to determine the efficiency of heat treatment in removing the microbial load. Methodology: Fresh as well as roasted (over low flame for 15 min) insect samples were used to determine the microbial contaminants. Crushed insect...

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Bibliographic Details
Published in:Journal of environmental biology 2023-07, Vol.44 (4), p.587-593
Main Authors: Kiewhuo, P., Trivedi, N., Mozhui, L., Dhillon, M.K., Kakati, L.N.
Format: Article
Language:English
Subjects:
Aerobic microorganisms
Bacteria
Colonies
Contaminants
Environmental science
Food contamination
Food contamination & poisoning
Food quality
Food safety
Food sources
Heat treatment
Heat treatments
Insects
Microbial contamination
Microorganisms
Nutrients
Parameter identification
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Summary:Aim: To analyze the microbial load in raw and roasted insects in an attempt to determine the efficiency of heat treatment in removing the microbial load. Methodology: Fresh as well as roasted (over low flame for 15 min) insect samples were used to determine the microbial contaminants. Crushed insect samples were suspended in sterile half-strength nutrient broth solution and were further serially diluted 10-fold (up to 10-10) in isotonic half-strength nutrient broth solution. The total number of aerobic mesophilic microorganisms were determined on plate count agar and expressed as log Cfu g-1. Results: Differences in the number of microbial colonies were observed in fresh and roasted samples. The microbial load ranged from 6.30-8.75 log Cfu g-1 and showed that the highest microbial colonies were present in the fresh samples. The average log Cfu g-1 in fresh insect samples (7.57±0.87) was significantly higher (P
ISSN:0254-8704
2394-0379
DOI:10.22438/jeb/44/4/MRN-5097