Mytilus - parasitology, California - epidemiology, Humans, Environmental Monitoring - methods, Genotype, Toxoplasma - isolation & purification, Toxoplasmosis, Animal - epidemiology, Toxoplasmosis, Animal - prevention & control, Sequence Analysis, DNA, Polymerase Chain Reaction - methods, Carnivora - parasitology, Animals, Toxoplasma - genetics, Polymorphism,...