Although Lyme and other tick-borne diseases were not recognized at the time, they probably added to the list of WWI infectious diseases as well

WWI-related infections such as trench foot, trench fever (caused by louse-borne Rickettsia quintana, subsequently called Bartonella quintana), a range of helminths, intestinal parasites (including Ascaris, Trichuris, Capillaria and Taenia spp.), typhus, cholera, tuberculosis, typhoid fever, dysentery, scarlet fever, diphtheria, measles, whooping cough, and smallpox were not uncommon.5 Rape, prostitution, and sexual indiscretion that often occur during wars encourage the proliferation of venereal diseases. As the war spread beyond Europe, many soldiers were infected with malaria and other exotic diseases. Although Lyme and other tick-borne diseases were not recognized at the time, they probably added to the list of WWI infectious diseases as well. "