Caption: Dust mite (Dermatophagoides pteronyssinus). Millions of dust mites inhabit the home, feeding on dead scales of human skin (organic detritus) that are common in house dust. The average double bed contains about two million dust mites of various species. The mite's body is in three parts: the gnathosoma (head region) adapted for feeding on dead skin, the propodosma (carrying the 1st & 2nd pair of walking legs) and the hysterosoma (locating the 3rd & 4th pairs of legs). Dust mites produce 10-20 waste particles per day. The dead bodies and fecal pellets can trigger allergic responses. The whole life cycle from egg to adult takes approximately one month to complete, mature female mites can lay from 1-2 eggs per day. Adult mites can live up to two months but this is dependent on the levels of humidity and temperature of their surrounding environment. The most important house dust mites worldwide are Dermatophagoides farinae and Dermatophagoides pteronyssinus. House dust mites are a common cause of asthma and allergic symptoms worldwide.
Magnification*: x50
Type: SEM
Copyright 2009 Dennis Kunkel Microscopy, Inc.
Keywords: 23719H,arachnids,dust mite,dustmite,arachnid,Dermotophagoides,SEM,08.01.09,allergen,allergenic,Dermatophagoides farinae,Dermatophagoides microceras,Dermatophagoides pteronyssinus,dust,fecal pellet,feces,invertebrate,invertebrates,allergens,house dust mite,house dust mites,house pest,pest,European house dust mite,European house dust mites,allergic symptom,allergic symptoms,asthma,dead skin,dead skin flake,dead skin flakes,organic detritus