This genus includes a single species, Tyrolichus casei. It has been found under bark, soil, decaying plant materials, bird and mammal nests, and stored food. Except for cheese (see below), infestation rate in stored food is relatively low. Tyrolichus does not form phoretic deutonymphs and disperses as feeding stages.
There are multiple records of Tyrolichus casei from beehives (Apis mellifera and Apis cerana) throughout the world. The mites can reproduce in considerable numbers (Delfinado-Baker and Baker, 1987) in debris from old combs. Under laboratory conditions, they prefer bee bread, pollen, beehive debris and, to a lesser extent, honey, dead brood bees, and mold; they did not reproduce on royal jelly or propolis (Chmielewski, 1991c).
In New Zealand Tyrolichus casei has been recorded as a major pest of the cheese industry, responsible for severe infestations of cheese in curing rooms (Robertson, 1946). In France and Germany this species has been historically used to produce "mite cheese:" Milbenkäse and Mimolette, for gourmet consumption. The mite is known to cause respiratory diseases to individuals handling infested cheese (Molina et al., 1974) as well as dermatitis (Hughes, 1976). In 2013 the US Food and Drug Administration (FDA) restricted import of Mimolette cheese to the USA due to mite infestation.