title: Mite species identification in the production of allergenic extracts for clinical use and in environmental samples by ribosomal DNA amplification.
abstract: The identification of allergy-causing mites is conventionally based on morphological characters. However, molecular taxonomy using ribosomal DNA (rDNA) may be particularly useful in the analysis of mite cultures and purified mite fractions in the production of allergenic extracts. Full-length internal transcribed spacers (ITS1 and ITS2) were obtained from Dermatophagoides farinae, Dermatophagoides pteronyssinus, Dermatophagoides microceras and Euroglyphus maynei (Astigmata: Pyroglyphidae), Glycyphagus domesticus and Lepidoglyphus destructor (Astigmata: Glycyphagidae), Tyrophagus fanetzhangorum, Tyrophagus putrescentiae, Tyrophagus longior, Tyrophagus neiswanderi, Acarus farris and Acarus siro (Astigmata: Acaridae), and Blomia tropicalis (Astigmata: Echymopodidae), using mite-specific primers. Polymerase chain reaction (PCR) products were digested with HpaII and RsaI restriction enzymes in order to produce species-specific PCR restricted fragment length polymorphism (RFLP) profiles. A semi-nested re-amplification step was introduced before the RFLP in order to apply the method to environmental samples. Results demonstrate that rDNA sequences can be used for the unambiguous identification of mite species. The PCR-RFLP system allows the identification of species in purified mite fractions when the availability of intact adult mite bodies for morphological identification is limited. This reliable and straightforward PCR-RFLP system and the rDNA sequences obtained can be of use in the identification of allergy-causing mite species.
authors.affiliation: Department of Environmental Biology, Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain.
authors.forename: B
authors.initials: B
authors.lastname: Beroiz
authors.forename: F
authors.initials: F
authors.lastname: Couso-Ferrer
authors.forename: F
authors.initials: F
authors.lastname: Ortego
authors.forename: M J
authors.initials: MJ
authors.lastname: Chamorro
authors.forename: C
authors.initials: C
authors.lastname: Arteaga
authors.forename: M
authors.initials: M
authors.lastname: Lombardero
authors.forename: P
authors.initials: P
authors.lastname: Castañera
authors.forename: P
authors.initials: P
authors.lastname: Hernández-Crespo
mesh_terms: D000485:Allergens / Q000276:immunology; D000818:Animals; D060829:Arthropod Proteins / Q000235:genetics / Q000276:immunology; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D003888:Desensitization, Immunologic / Q000379:methods*; D004784:Environmental Monitoring / Q000379:methods*; D008925:Mites / Q000145:classification* / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D012340:RNA, Ribosomal, 5.8S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013045:Species Specificity
chemical_list: D000485:Allergens; D060829:Arthropod Proteins; D021903:DNA, Ribosomal Spacer; D012340:RNA, Ribosomal, 5.8S
keywords: Acarus; Blomia; Dermatophagoides; Euroglyphus; Glycyphagus; Lepidoglyphus; Tyrophagus; allergy; molecular taxonomy