Trench fever (also known as "five-day fever", "quintan fever" (Latin: febris quintana), and "urban trench fever") is a moderately serious infectious disease caused by the bacterium Bartonella quintana and transmitted by body lice. From 1915 to 1918 between one-fifth and one-third of all British troops reported ill had trench fever while about one-fifth of ill German and Austrian troops had the disease...