rift valley fever: an infection common in Africa caused by a bunyavirus; transmitted by mosquitoes or by handling infected animals
hemorrhagic fever: a group of illnesses caused by a viral infection (usually restricted to a specific geographic area); fever and gastrointestinal symptoms are followed by capillary hemorrhage
ecliptic: the great circle representing the apparent annual path of the sun; the plane of the Earth's orbit around the sun; makes an angle of about 23 degrees with the equator