Taina Syrjämaa
Tracing ticks and a multispecies network in nineteenth- and early twentieth-century Finland
Ticks have probably lived for centuries in the Finnish territory. However, their exact distribution was not mapped before the 1950s and only few overt traces of them exist in historical sources. For example, oral history collections contain hardly any reference directly to them. My search for ticks in rural nineteenth and early twentieth century Finland started with the dilemma of ticks’ invisibility in the then society.
Eventually, merging the history of everyday life and the history of science and knowledge have disclosed ticks’ presence and multispecies interaction. Redwater fever (the American equivalent: Texas fever), i.e. a bovine illness caused by protozoa transmitted by ticks, has proved to be a key to re-read historical sources. One aspect of the story is the lengthy scientific process of identifying the mechanism of this cattle disease towards the turn of the century (and even lengthier period of time when veterinarians tried to promulgate the findings). What is more, when ticks’ role as vectors of the disease is known, all earlier (and contemporary) descriptions of outbreaks of redwater fever turn into evidence of ticks and their lives. This discloses a network at expanding pastures at a time of intensifying animal husbandry which consisted of ticks, Babesia protozoa, bovines and humans, but also of other species such as horseflies, frogs, redstarts and some plant species such as alders.