M. -J. Simard

Abstract We investigate the dynamics of spin-12 particles that are freely propagating in superposed states in curved spacetime. We first make use of a Wentzel-Kramers-Brillouin approximation of the Dirac equation in curved spacetime to extract the corresponding Mathisson-Papapetrou-Dixon equations that describe the deviation from geodesic motion as well as the spin precession of such particles.

Keywords Toxoplasma gondii Marine mammals Genotype Prevalence Clinical disease Diagnosis 1. Introduction The protozoan parasite Toxoplasma gondii infects virtually all warm-blooded animals, including humans, livestock, and marine mammals (Dubey, 2010). Approximately one-third of humanity is infected with T. gondii worldwide although this varies markedly between populations.