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Comparative study of microbial, proximate and heavy metal compositions of some gastropods, bivalve and crustacean seafood

Oranusi, S. U. and Effiong, E. D. and Duru, N. U. (2018) Comparative study of microbial, proximate and heavy metal compositions of some gastropods, bivalve and crustacean seafood. AFRICAN JOURNALS ONLINE (AJOL) JOURNALS ADVANCED SEARCH USING AJOL RESOURCES, 19 (4).

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Background: Seafood are known to be nutritionally rich, however, water bodies from where these foods are harvested are often burdened with wastes from industries, household and run‐offs. Thus seafood can harbor pathogenic microorganisms and heavy metals which can pose a serious health hazard to consumers. Materials and Methods: In this study, 5kg each of Littorina littorea, Achatina fulica,Tympanotonos fuscatus, Dorsanum miran, Egeria radiate and Penaeus notialis were investigated for microbial, proximate and heavy metal qualities using standard microbiological and chemical methods of analysis. Results: The gastropod mollusks Tympanotonos fuscatus, Littorina littorea and Achatina fulica had significantly (p≤0.05) higher microbial loads compared to other samples. All the samples had significantly (p≤0.05) higher coliform counts compared to standard specifications. The microbial isolates from the samples included species of Bacillus, Klebsiellae, Citrobacter, Providencia, Pseudomonas, Staphylococcus aureus, Escherichia coli and Aspergillus niger, Aspergillus flavus, yeasts, Alternaria, Absidia, Rhizopus, and Mucor. Antibiogram of the isolates revealed multiple resistances with 79.55% and 66.67% resistance to antibacterial and antifungal agents respectively. The seafood was rich in protein (8.0±0.03 to 46.0±0.03%) and fat (0.6±0.01 to 8.8±1.00%) but low in carbohydrate (1.18±0.84 to 3.81±0.86%).The heavy metal compositions of the seafood were generally low except for manganese 6.36±0.03ppm in Dorsanum miran and nickel 0.81±0.50 ppm in Penaeus notialis.

Item Type: Article
Uncontrolled Keywords: Seafood; Heavy metals; Microbial profile; proximate compositions
Subjects: Q Science > QH Natural history > QH301 Biology
Q Science > QR Microbiology
Divisions: Faculty of Medicine, Health and Life Sciences > School of Biological Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 21 Nov 2019 09:40
Last Modified: 21 Nov 2019 09:40

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