Dust Mites

Der p 1 is the primary activator of Der p 3, Der p 6 and Der p 9 the proteolytic allergens produced by the house dust mite Dermatophagoides pteronyssinus

“…Examination of coronal sections under a confocal microscope revealed that Der p 6 immunoreactivity is only present in the digestive tract and, more specifically, in the hindgut (Hg) following the terminology of Brody et al [28]. Indeed, Der p 6 was observed in cells in the absence of ingested material and in the gut lumen (red fluorescence, Fig.…”

“…Previous observations of the digestive tract of the mite showed that cells lining the anterior midgut, where pH is comprised between 4 and 5, would be gradually detached in the gut lumen and would then be taken in the faecal pellets in the posterior midgut and the hindgut, where pH reaches 6 [28][29][30]. It is thus likely that the auto-activation of proDer p 1 occurring at acidic pH proceeds in the anterior midgut, thereby providing active protease Der p 1.…”

Echimyopus dasypus Fain et al. (Acari: Astigmatina: Echimyopodidae) from a nine-banded armadillo, Dasypus novemcinctus L. (Mammalia: Dasypodidae), in Florida, USA.

“…Free-living life stages are described for only a few species in three of the genera, i.e., Marmosopus Fain & Lukoschus, Echimyopus Fain, and Blomia Oudemans, the latter of which have no known deutonymphs and no demonstrated parasitic connections (Mariana et al 1996). Alone in the family, the seven currently recognized Blomia species are widely known primarily as synanthropic house dust and stored food mites (Colloff 2009).…”

Free living astigmatid mites (Astigmatina): new taxa, rearing and use for mesostigmatid (Mesostigmata) predatory mite production

“…Acaridae, Aeroglyphidae, Chortoglyphidae, Echimyopodidae, Euglycyphagidae, Glycyphagidae, Pyroglyphidae and Suidasiidae are astigmatids commonly found in house dust (COLLOFF, 2009;HART, 1990; 1975;SOLOMON;CUNNINGTON, 1964;VOORHORST;SPIEKSMA;VAREKAMP, 1969). However, maintaining large colonies of dust mites is a fundamental process and one of the main difficulties in the preparation of allergens for the diagnostic and treatment for allergy caused by them (VENTOSA; CURVO, 1998).…”

“…In these places, astigmatids find their main food items, skin scale and fungi (COLLOFF, 2009;HART, 1990;PLATTS-MILLS et al, 1989), as well as other items that they also accept as food, such as bacteria, their own feces and organic debris (COLLOFF, 2009;HUBERT, 2008;PLATTS-MILLS et al, 1989;van BRONSWIJK, 1973).…”