The cost to build a septic tank system varies widely, depending on your location. According to SepticTankGuide.com, a standard or conventional gravity system for a 3-bedroom home on a level site with good soil would likely cost from $1,500 to upward of $4,000.
Malaria is caused by the protozoan parasite Plasmodium. Human malaria is caused by four different species of Plasmodium: P. falciparum, P. malariae, P. ovale and P. vivax. Humans occasionally become infected with Plasmodium species that normally infect animals, such as P. knowlesi.
Plasmodium malariae wiki. P. malariae is the only human malaria parasite that causes fevers that recur at approximately three-day intervals (therefore occurring evey fourth day, a quartan fever), longer than the two-day (tertian) intervals of the other malarial parasites.