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Alves VS, Salazar-Garcés LF, Santiago LF, Fonseca PLC, Fernandes AMS, Silva RC, Souza LM, Cunha PPRS, Barbosa MFC, Aguiar ERGR, Pacheco LGC, Alcantara-Neves NM, Pinheiro CS. Identification of Glycycometus malaysiensis (for the first time in Brazil), Blomia tropicalis and Dermatophagoides pteronyssinus through multiplex PCR. Exp Appl Acarol 2022; 86:385-406. [PMID: 35286553 PMCID: PMC8919168 DOI: 10.1007/s10493-022-00694-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
Blomia tropicalis and Dermatophagoides pteronyssinus play an important role in triggering allergy. Glycycometus malaysiensis causes IgE reaction in sensitive people, but is rarely reported in domestic dust, because it is morphologically similar to B. tropicalis making the identification of these species difficult. The identification of mites is mostly based on morphology, a time-consuming and ambiguous approach. Herein, we describe a multiplex polymerase chain reaction (mPCR) assay based on ribosomal DNA capable to identify mixed cultures of B. tropicalis, D. pteronyssinus and G. malaysiensis, and/or to identify these species from environmental dust. For this, the internal transcribed spacer 2 (ITS2) regions, flanked by partial sequences of the 5.8S and 28S genes, were PCR-amplified, cloned and sequenced. The sequences obtained were aligned with co-specific sequences available in the GenBank database for primer design and phylogenetic studies. Three pairs of primers were chosen to compose the mPCR assay, which was used to verify the frequency of different mites in house dust samples (n = 20) from homes of Salvador, Brazil. Blomia tropicalis was the most frequent, found in 95% of the samples, followed by G. malaysiensis (70%) and D. pteronyssinus (60%). Besides reporting for the first time the occurrence of G. malaysiensis in Brazil, our results confirm the good resolution of the ITS2 region for mite identification. Furthermore, the mPCR assay proved to be a fast and reliable tool for identifying these mites in mixed cultures and could be applied in future epidemiological studies, and for quality control of mite extract production for general use.
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Affiliation(s)
- Vítor S Alves
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil
- Vaccine Development Laboratory, Instituto Butantan, São Paulo, 05503-900, Brazil
| | - Luis F Salazar-Garcés
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil
- Faculty of Health and Social Welfare, State University of Milagro, Milagro, 091050, Ecuador
| | - Leonardo F Santiago
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil
| | - Paula L C Fonseca
- Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, 30270-901, Brazil
| | - Antônio M S Fernandes
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil
| | - Raphael C Silva
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil
| | - Lorena M Souza
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil
- Salvador University, Salvador, 41720-200, Brazil
| | - Pedro P R S Cunha
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil
| | - Marina F C Barbosa
- Luiz de Queiroz' Higher School of Agriculture, University of São Paulo, Piracicaba, São Paulo, 13418-900, Brazil
| | - Eric R G R Aguiar
- Center of Biotechnology and Genetics, State University of Santa Cruz, Ilhéus, 45652-900, Brazil
| | - Luis G C Pacheco
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil
| | - Neuza M Alcantara-Neves
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil
| | - Carina S Pinheiro
- Laboratory of Allergy and Acarology, Institute of Health Sciences, Federal University of Bahia, Avenida Reitor Miguel Calmon, S/n, Vale do Canela, Salvador, Bahia, CEP: 40110-100, Brazil.
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