CGSpaceA Repository of Agricultural Research Outputs
    View Item 
    •   CGSpace Home
    • International Livestock Research Institute (ILRI)
    • ILRI supervised theses and dissertations
    • View Item
       
    • CGSpace Home
    • International Livestock Research Institute (ILRI)
    • ILRI supervised theses and dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Evaluation of microbial contamination along the milk value chain in two districts of Tanzania

    Thumbnail
    View/Open
    Microbial contamination TZ milk value chain.pdf (1.155Mb)
    
    Authors
    Hyera, E.
    Date
    2015-11
    Language
    en
    Type
    Thesis
    Accessibility
    Open Access
    Metadata
    Show full item record
    Share
    Citation
    Hyera, E. 2015. Evaluation of microbial contamination along the milk value chain in two districts of Tanzania. MSc thesis in Tropical Animal Production. Morogoro, Tanzania: Sokoine University of Agriculture.
    Permanent link to cite or share this item: https://hdl.handle.net/10568/69123
    Abstract/Description
    Milk is important as a valuable diet, but due to its nutritional value and perishable product it serves as an ideal medium for development of various microorganisms under suitable conditions, hence it is a staple food in epidemiology linked to zoonotic pathogens. This study was carried out in two districts in Tanga region (Northern Tanzania) to estimate microbial load, isolate selected pathogens and establish their possible sources or entry along the milk value chain. A total of 114 respondents were interviewed and subsequently milk samples were aseptically collected for laboratory microbial analyses using the standard ISO procedures for Food microbial analyses — Horizontal methods. The results revealed poor practices and lack of formal training on milk hygiene among most of the actors. More than 90% of all handled milk samples had Total plate count (TPC) above the EAC maximum acceptable standard of 2.0x105 CFU/ml. The overall mean coliform plate count (CPC) was 2.2x105 ± 1.9x105 CFU/ml, which indicated poor animal husbandry and hygiene practices. Least Squares Means have shown a statistical significant difference (P < 0.05) between households and milk suppliers for TPC and between households and street vendors for CPC. In the samples, one contained CPS isolate counting to 5.1x105 CFU/ml likely to cause staphylococcal poisoning. Isolated bacteria were Escherichia coli, Staphylococcus aureus and Listeria spp. including Listeria monocytogenes. Other microorganisms included Klebsiella spp., Proteus spp., Staphylococcus spp., Enterococcus faecalis, Bacillus cereus and Pseudomonas spp. Among identified pathogens, L. monocytogenes was most (42.1%) predominant. The quality of milk was poor; unhygienic practices, poor animal husbandry practices, organization of milk supply chains and dysfunction of the regulatory authorities predispose the public to risk of contracting milk-borne infections. Training on animal husbandry practices and public education on general milk hygiene are recommended. Also, sector policies, organizational structures, support services and research into public health risks in milk must be focused.
    CGIAR Affiliations
    Agriculture for Nutrition and Health
    AGROVOC Keywords
    FOOD SAFETY
    Subjects
    VALUE CHAINS; DAIRYING; FOOD SAFETY;
    Countries
    TANZANIA
    Regions
    AFRICA; EAST AFRICA
    Collections
    • Safe food, fair food [289]
    • ILRI supervised theses and dissertations [621]

    AboutPrivacy PolicySend Feedback
     

    My Account

    LoginRegister

    Browse

    All of CGSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesBy AGROVOC keywordBy ILRI subjectBy CPWF subjectBy CCAFS subjectBy CIFOR subjectBy IWMI subjectBy RegionBy CountryBy SubregionBy CRP subjectBy River basinBy Output typeBy CTA subjectBy WLE subjectBy Bioversity subjectBy CIAT subjectBy CIP subjectBy animal breedBy CGIAR System subjectThis CollectionBy Issue DateAuthorsTitlesBy AGROVOC keywordBy ILRI subjectBy CPWF subjectBy CCAFS subjectBy CIFOR subjectBy IWMI subjectBy RegionBy CountryBy SubregionBy CRP subjectBy River basinBy Output typeBy CTA subjectBy WLE subjectBy Bioversity subjectBy CIAT subjectBy CIP subjectBy animal breedBy CGIAR System subject

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    AboutPrivacy PolicySend Feedback