Protozoan infections are parasitic diseases organisms formerly classified in the Kingdom Protozoa. Protozoan infections in animals may be caused by organisms in the sub-class Coccidia (which causes Coccidiosis) and species in the genus Besnoitia (causes Besnoitiosis). They are treated with antiprotozoal agents. A journal is a periodical publication intended to further progress of science, usually by reporting new research. Most journals are highly specialized, although some of the oldest journals publish articles, reviews, editorials, short communications, letters, and scientific papers across a wide range of scientific fields.