Abstract

Taenia solium cysticercosis disease remains a key challenge to the pig sector in low- and middle-income countries in sub-Saharan Africa, Latin America and South East Asia, resulting in both economic losses and public health impacts. The World Health Organization has ranked it first on the global scale of foodborne parasites. A One Health approach has been recommended for reduction of infection pressure and eradication in the longer term. A new vaccine TSOL18 (Cysvax™), applied in combination with oxfendazole (Paranthic 10%™), a dewormer drug has been developed and field tested for the control of T. solium cysticercosis, with high potential to break the disease cycle. It is however unclear whether the products can be marketed through a market driven approach, and if smallholder pig farmers would be willing to take up and pay for the vaccine–oxfendazole combination. A choice experiment methodology was used to assess the potential demand and willingness to pay for the vaccine—oxfendazole combination by Ugandan smallholder pig farmers, and demand for vaccinated pigs by pig traders. The results showed that farmers highly valued quality assurance attributes and were not keen on the vaccine if there were no associated returns in the form of premium price for vaccinated pigs during sales. They were willing to pay US$ 2.31 for the vaccine if it resulted in a premium price for vaccinated pigs. Furthermore, they preferred an accompanying vaccine viability detector as part of its quality assurance. The pig traders on the other hand preferred high carcass weight of pigs, potentially achieved by using oxfendazole. The results show that unless the pig market systems pay a premium price for vaccinated pigs, and quality assurance systems guarantee quality vaccine, uptake of the TSOL18 vaccine and oxfendazole by farmers through market mechanisms may be unsuccessful. The current pig marketing system does not reward food safety, the focus is mainly on carcass weight. Alternative delivery mechanisms for the vaccine through a mix of private–public investments needs to be explored, as the benefits of vaccinated pigs are societal and include reduction and elimination of neurocysticercosis in the long run.

Highlights

  • Zoonotic parasites, such as Taenia solium cysticercosis are a key challenge to the pig sector in low- and middle-income countries in sub-Saharan Africa, Latin America and South and South East Asia, resulting in both economic losses and public health impacts

  • At least half of the pig farmers interviewed were aware of T. solium cysticercosis

  • Twentytwo per cent of the farmers in the overall sample indicated their pigs had suffered from T. solium cysticercosis in the last 24 months

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Summary

Introduction

Zoonotic parasites, such as Taenia solium cysticercosis are a key challenge to the pig sector in low- and middle-income countries in sub-Saharan Africa, Latin America and South and South East Asia, resulting in both economic losses and public health impacts. Despite its traumatizing health and socioeconomic impacts, T. solium cysticercosis has received little attention in terms of investments for control and elimination and is considered a neglected disease by The World Health Organization (1), despite being a potentially eradicable disease. The feasibility of delivery of interventions in whole or part through private or public sector investments remain unclear. This will largely depend on the context and circumstances of various countries

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