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Enrolment into the study was on a strictly voluntary basis and the objectives, risks and benefits of the study were explained in detail to all individuals. We explained in detail the objectives of the study, and any possible health risks, to the parasite donor to ensure that he was well informed and was giving his consent freely and willingly, after which he signed a consent form. Handling of the animals and the investigations carried out were in strict accordance with the international guidelines of rearing animals and using them in medical research. The manipulations of the animals were in strict accordance with the Animal Welfare Legislation and Policies and complied with the Animals (Scientific Procedures) Act 1986 (ASPA) and its associated codes of practice on animal housing and care []. Previous works that used the same procedures are found here [].","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare that they have no competing interests.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}},{"value":"Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Publisher\u2019s Note"}}],"article-number":"14"}}