by Leah Chandler. Disease Etiology: Malaria is a protozoan disease, which are a group of eukaryotic single-celled organisms that infect humans and inhabit the body as parasites. Malaria is caused by four species of the protozoan genus Plasmodium, P falciparum, P vivax, P malariae, and P ovale.
The average NFL referee salary was $173,000 in 2013, and it is set to rise to $201,000 by 2019. Note that the NFL season only lasts about half the year, and for most NFL referees, refereeing is not their only job.
Average Annual Pro MLS Soccer Ref Salary Range. With FIFA and the MLS dominating TV viewership around the world, many people are asking the question: how much do the referees make? The average salary for a professional soccer referee is $21,000 per year.