Incidence of RVFV antibody acquisition per zone including statistical analysis, Union of Comoros 2011.

CI: stands for Confidence Interval, * nrisk represents the number of animals at risk in a susceptible RVFV infection period, ** Fisher exact test, p-value significant if p<0.05. The incidence rate was determined using an Access database in the Laser format (available at http://livtools.cirad.fr/) [29]–[31] by calculating the instantaneous risk of infection (the risk that an animal will be infected in a given period) [29] taking into account the risk of seroconversion, death or lost animals. The number of animals in an at-risk period represents the total number of animals in a susceptible period of RVFV infection.