Start Date: June 2018
Rabies kills an estimated 59,000 people every year. Most of these deaths are from the poorest sectors of society in low- and middle-income countries, where dogs are the principal reservoir of rabies . There are two ways to limit human rabies deaths: delivering timely post-exposure prophylaxis and interrupting the transmission of rabies virus in dogs, the reservoir host. The advantage of interrupting transmission is that it addresses the source of the problem and provides enormous, long-term public health and economic benefits. The World Health Organization (WHO) has set the goal of zero human deaths from dog-mediated rabies by 2030. The proposed mechanism for accomplishing this is through vaccinating at high enough coverage (≥70%) to achieve herd immunity.
With more than 20,000 human deaths each year due to dog-transmitted rabies, India has the highest disease burden [2, 3]. Furthermore, India also has the largest free-ranging dog population in the world (~59 million) . Achieving and sustaining high vaccination coverage across large geographic scale is a daunting challenge due to high population turnover rates, reliance on community participation to access dogs, cost, and lack of political will . At present, rabies and dog population control programs in India are limited to a few urban centers. Ironically, most dog-mediated human rabies deaths occur in rural areas of India .
The objective of this research is to find focused, efficient strategies for interrupting dog to dog transmission of rabies virus in resource-limited settings. This will make a major contribution to eliminating dog-mediated human rabies deaths in India and beyond.
Our scientific hypothesis is that rabies arrives recurrently in rural dog populations through stepping-stone dispersal originating in urban populations where the disease is endemic (Figure 1). Because dog population size is large in urban areas and small in rural villages, we also hypothesize that stochasticity is important in persistence (or lack thereof).
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