Diatonic and chromatic melodic lines predominate, supported by tertian and polychordal harmonies. Plasmodium ovale wallikeri is a subspecies of parasitic protozoa that causes tertian malaria in humans. Plasmodium ovale is a species of parasitic protozoa that causes tertian malaria in humans. Soon Anjou fell seriously ill with "tertian ague", malaria. Hippocrates described periodic fevers, labelling them tertian, quartan, subtertian and quotidian. It rejects the tertian chordal basis as pertaining at all. Pope Julius II died on Monday 21 February 1513 of a double tertian fever (malaria). The meantone temperament, a system of tuning that emphasises pure thirds, may be called "tertian". Ninth, eleventh, and thirteenth chords are known as "extended" tertian chords. In music theory, tertian (, "of or concerning thirds") describes any piece, chord, counterpoint etc. These chords are not tertian and can be used in non-tertian harmony. In his book "Modus Lacscivus" (1975) he explored a set of 82 basic tertian chords. The unit was also known as a "tertian" (from the Latin word for "third"). Overseas, Lazarus is seriously wounded in combat, but is rescued by his Tertian household.