TROMBICULIASIS trobiculina autumnalis Infection of cats produced by the larvae of a mite, whose main agents are Eutrombicula alfreddugesi and Euschongastia nuñezi-hoffman. The first active stage is the 6-legged larva, the only one in which it can infest animals or humans. The larva measures 0 . 2 mm, can be seen without microscope as an orange dot, and reaches up to 0.6 mm. after feeding . They are present in the vegetation and are active while there is light, especially in dry and sunny weather, which occurs towards the end of June in the northern hemisphere, and December in the south.
