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dc.contributor.authorMARIMO, GRACE
dc.date.accessioned2019-01-18
dc.date.available2019-01-18
dc.date.issued2018-06-30
dc.identifier.urihttp://hdl.handle.net/2123/19805
dc.description.abstractSmall-scale poultry make a substantial contribution to food security and poverty alleviation in the livelihoods of resource-poor and highly vulnerable households in low-income, food-deficient countries. The emergence and spread of infectious diseases, including zoonoses such as the highly pathogenic avian influenza A subtype H5N1, can result in extreme economic losses and risk public health. Conventional decontamination measures are not feasible in resource-limited rural settings. Alternative cheap traditional methods, such as wood ash, are used to manage and control diseases in family poultry production. This study investigated the antimicrobial properties of wood ash in varying forms. Wood ash efficacy was determined in vitro on three distinct categories of disease agents in family poultry: bacteria, virus and parasites. Wood ash from red gum (Eucalyptus camaldulensis) was the test material. Varying concentrations of wood ash lye (0.1%–100%) were measured for antimicrobial efficacy on E. coli and avian influenza virus (AIV) at 2.5, 5, 7.5 and 10-minute intervals. Also, pH values for the corresponding concentrations were determined. Wood ash lye (WAL) was found to have a pH 11.64 at a concentration of 10% and pH 12. 93 at a concentration of 100% . The pH of WAL at 100% concentration remained constant 12 months after preparation. Wood ash in powder form (WAP) could not inhibit sporulation in unsporulated oocysts of mixed Eimeria species after 96 hours at 0.1, 1 and 10% (w/v) concentrations. WAL inhibited E. coli growth at a pH 11.94 at a concentration of 20% after five minutes’ exposure, whereas it could not inactivate AIV, even after 10 minutes’ incubation. The results suggest that WAL may be a suitable alkaline antibacterial agent to potentially contribute to low-cost disease control intervention strategies tailored for small-scale poultry to improve production and public health.en_AU
dc.publisherUniversity of Sydneyen_AU
dc.publisherFaculty of Scienceen_AU
dc.publisherSchool of Life and Environmental Sciencesen_AU
dc.rightsThe author retains copyright of this thesis. It may only be used for the purposes of research and study. It must not be used for any other purposes and may not be transmitted or shared with others without prior permission.en_AU
dc.subjectfamily poultryen_AU
dc.subjectbiosecurityen_AU
dc.subjectalkaline disinfectionen_AU
dc.subjectwood ashen_AU
dc.subjectlimeen_AU
dc.subjectdisinfectionen_AU
dc.titleIn Vitro Antimicrobial Efficacy of Wood Ash Lye: Implications for family poultry production in developing countriesen_AU
dc.typeMasters Thesisen_AU
dc.type.pubtypeMaster of Science in Veterinary Science M.Sc.Vet.Sc.en_AU
dc.description.disclaimerAccess is restricted to staff and students of the University of Sydney . UniKey credentials are required. Non university access may be obtained by visiting the University of Sydney Library.en_AU


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