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Ribeiro da Silva RC, Nava Piorsky Dominici Cruz L, da Silva Coutinho JM, Correia Santana NC, Macário Rebêlo JM. Maintenance and Productivity of a Lutzomyia longipalpis (Diptera: Psychodidae) Colony from an Area Endemic for Visceral and Cutaneous Leishmaniasis in Northeastern Brazil. J Med Entomol 2021; 58:1917-1925. [PMID: 33822113 DOI: 10.1093/jme/tjab053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Indexed: 06/12/2023]
Abstract
Studies on experimental sand fly infection require the availability of colonies and laboratory conditions. In Brazil, Lutzomyia longipalpis (Diptera: Psychodidae) (Lutz and Neiva 1912) is responsible for the highest infection rates by Leishmania spp. and this species is one of the most suitable species for laboratory colonization. In this study, we describe a method for growing Lu. longipalpis in laboratory conditions (10 generations) from natural populations sampled from a region of high endemicity for visceral leishmaniasis in the state of Maranhão, Northeastern Brazil. Using two methods (individualized or grouped females), the colony's highest productivity occurred in the first four generations, where all stages presented with high frequency. Nonviable eggs represented more than 50% of the total eggs produced by engorged females, while pupae were more resistant to fungal contamination, with a mortality rate of only 2%. In both methods, there was a predominance of female emergence; however, the ratio between males and females did not show significant differences, IF (P = 0.8023) and GF (P = 0.1831). Using the method of individualized females, the F4 generation took the longest to appear (234 d; 64 ± 57 d); by grouped females, F3 took the longest to appear (102 d; 47 ± 20 d). This method provides sufficient numbers of insects to perform vector competence tests for Leishmania spp. that cause the cutaneous form of leishmaniasis, usually found in Lu. longipalpis sampled from the study location.
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Affiliation(s)
- Rosa Cristina Ribeiro da Silva
- Laboratory of Entomology and Vectors, Department of Biologia, Universidade Federal do Maranhão - UFMA, Cidade Universitária do Bacanga, São Luís, Maranhão, Brazil
- Programa de Pós-Graduação em Ciências da Saúde da UFMA, Department of Ciências Fisiológicas, São Luís, Maranhão, Brazil
- Laboratório de Genética e Biologia Molecular, Department of Biologia (UFMA), São Luís, Maranhão, Brazil
| | - Léo Nava Piorsky Dominici Cruz
- Laboratory of Entomology and Vectors, Department of Biologia, Universidade Federal do Maranhão - UFMA, Cidade Universitária do Bacanga, São Luís, Maranhão, Brazil
- Laboratório de Biologia Molecular de Insetos, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Department of Biologia Parasitária, Rio de Janeiro, Brazil
| | - João Manoel da Silva Coutinho
- Laboratory of Entomology and Vectors, Department of Biologia, Universidade Federal do Maranhão - UFMA, Cidade Universitária do Bacanga, São Luís, Maranhão, Brazil
- Programa de Pós-Graduação em Ciências da Saúde da UFMA, Department of Ciências Fisiológicas, São Luís, Maranhão, Brazil
| | - Núrzia Cristina Correia Santana
- Laboratory of Entomology and Vectors, Department of Biologia, Universidade Federal do Maranhão - UFMA, Cidade Universitária do Bacanga, São Luís, Maranhão, Brazil
| | - José Manuel Macário Rebêlo
- Laboratory of Entomology and Vectors, Department of Biologia, Universidade Federal do Maranhão - UFMA, Cidade Universitária do Bacanga, São Luís, Maranhão, Brazil
- Programa de Pós-Graduação em Ciências da Saúde da UFMA, Department of Ciências Fisiológicas, São Luís, Maranhão, Brazil
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