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High Parasitic Loads Quantified in Sylvatic Triatoma melanica, a Chagas Disease Vector. Pathogens 2022; 11:pathogens11121498. [PMID: 36558833 PMCID: PMC9785645 DOI: 10.3390/pathogens11121498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 11/29/2022] [Accepted: 12/01/2022] [Indexed: 12/13/2022] Open
Abstract
Triatoma melanica is a sylvatic vector species in Brazil. In We aimed to characterize the Trypanosoma cruzi discrete typing units (DTUs), the parasitic loads, and the blood meal sources of insects collected in rocky outcrops in rural areas in the state of Minas Gerais. An optical microscope (OM) and kDNA-PCR were used to examine natural infection by T. cruzi, and positive samples were genotyped by conventional multilocus PCR. Quantification of the T. cruzi load was performed using qPCR, and the blood meal sources were identified by Sanger sequencing the 12S rRNA gene. A total of 141 T. melanica were captured. Of these, ~55% (61/111) and ~91% (63/69) were positive by OM and KDNA-PCR, respectively. We genotyped ~89% (56/63) of the T. cruzi-positive triatomines, with TcI (~55%, 31/56) being the most prevalent DTU, followed by TcIII (~20%, 11/56) and TcII (~7%, 4/56). Only TcI+TcIII mixed infections were detected in 10 (~18%) specimens. A wide range of variation in the parasitic loads of T. melanica was observed, with an overall median value of 104 parasites/intestine, with females having higher T. cruzi loads than N2, N4, and N5. TcII showed lower parasitic loads compared to TcI and TcIII. The OM positive diagnosis odds ratio between T. cruzi infection when the parasite load is 107 compared to 103 was approximately 29.1. The most frequent blood meal source was Kerodon rupestris (~58%), followed by Thrichomys apereoides (~18%), Wiedomys cerradensis (~8%), Galactis cuja (~8%) and Gallus gallus (~8%). Our findings characterize biological and epidemiological aspects of the sylvatic population of T. melanica in the study area, highlighting the need to extend surveillance and control to this vector.
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Lima-Neiva V, Toma HK, Abrantes Aguiar LM, Lopes CM, Dias LP, Monte Gonçalves TC, Costa J. The connection between Trypanosoma cruzi transmission cycles by Triatoma brasiliensis brasiliensis: A threat to human health in an area susceptible to desertification in the Seridó, Rio Grande do Norte, Brazil. PLoS Negl Trop Dis 2021; 15:e0009919. [PMID: 34752464 PMCID: PMC8577756 DOI: 10.1371/journal.pntd.0009919] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 10/17/2021] [Indexed: 11/21/2022] Open
Abstract
An outbreak of Chagas disease, possibly involving its vector Triatoma brasiliensis brasiliensis, was identified in the state of Rio Grande do Norte (RN). Given the historical significance of this vector in public health, the study aimed to evaluate its role in the transmission dynamics of the protozoan Trypanosoma cruzi in an area undergoing desertification in the Seridó region, RN, Brazil. We captured triatomines in sylvatic and anthropic ecotopes. Natural vector infection was determined using parasitological and molecular methods and we identified discrete typing units (DTUs) of T. cruzi by analyzing the COII gene of mtDNA, 24Sα rDNA, and mini-exon gene. Their blood meals sources were identified by amplification and sequencing of the mtDNA cytochrome b gene. A total of 952 T. b. brasiliensis were captured in peridomestic (69.9%) and sylvatic ecotopes (30.4%). A wide range of natural infection rates were observed in peridomestic (36.0% - 71.1%) and sylvatic populations (28.6% - 100.0%). We observed the circulation of TcI and TcII DTUs with a predominance of Tcl in sylvatic and peridomestic environments. Kerodon rupestris, rocky cavy (13/39), Homo sapiens, human (8/39), and Bos taurus, ox (6/39) were the most frequently detected blood meals sources. Thus, Triatoma b. brasiliensis is invading and colonizing the human dwellings. Furthermore, high levels of natural infection, coupled with the detection of TcI and TcII DTUs, and also the detection of K. rupestris and H. sapiens as blood meals sources of infected T. b. brasiliensis indicate a risk of T. cruzi transmission to human populations in areas undergoing desertification. Chagas disease currently affects about six to seven million people worldwide, resulting in high morbidity, mortality, and economic burden in endemic countries of Latin America. Its etiological agent, Trypanosoma cruzi, circulates among a wide variety of mammalian and insect vectors. Triatoma brasiliensis brasiliensis is adapted to the dry and warm climate of the Caatinga biome, and is considered the main vector in the semi-arid areas of northeastern Brazil. Information on the infestation, natural infection rates, T. cruzi strains, and blood meals sources of this vector is crucial for understanding the dynamics of T. cruzi transmission in areas susceptible to desertification. Triatoma b. brasiliensis colonizes peridomestic structures, particularly in the stone walls of cattle corrals that emerge as a refuge for sylvatic populations where they access a variety of blood meals sources. The predominance of the TcI strain in the sylvatic and peridomestic environments shows an overlap of transmission cycles by T. cruzi mediated by T. b. brasiliensis. The high rates of natural infection and the evidence of their feeding on humans and the rodent K. rupestris are worrisome and indicate the threat this vector poses to human health in the area studied.
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Affiliation(s)
- Vanessa Lima-Neiva
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro, Rio de Janeiro, Brazil
- * E-mail:
| | - Helena Keiko Toma
- Laboratório de Diagnóstico Molecular e Hematologia, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Catarina Macedo Lopes
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz /FIOCRUZ, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Letícia Paschoaletto Dias
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Teresa Cristina Monte Gonçalves
- Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz /FIOCRUZ, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jane Costa
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro, Rio de Janeiro, Brazil
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Martínez-Ibarra JA, Nogueda-Torres B, Montañez-Valdez OD, Michel-Parra JG, Ambriz-Santos MÁ. Behavioral parameters of six populations of Meccus phyllosomus longipennis (Heteroptera: Reduviidae) from areas with high and low prevalences of Trypanosoma cruzi human infection. INSECT SCIENCE 2021; 28:850-860. [PMID: 32426905 DOI: 10.1111/1744-7917.12818] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 06/11/2023]
Abstract
Three behaviors of epidemiological importance, namely feeding latency, feeding duration and defecation latency, for six populations of Meccus phyllosomus longipennis (Usinger) from areas of central, western and north-central Mexico with high (HP) and low (LP) prevalence of Trypanosoma cruzi (Chagas) human infection were evaluated in this study. The median feeding latency (the time taken to begin feeding) was highly variable between instars. Within-instar comparisons showed that at least 65% of the LP populations (N3 to adult) started to feed significantly (P < 0.05) later than the HP population, with N1 showing no difference, and N2 from LP populations feeding sooner than those from HP populations. The six populations had similar median feeding durations within instars. A higher (P < 0.05) percentage of the instars from HP populations defecated faster than the respective instars from the three LP populations. Approximately 25% of the young nymphs (N1 to N3) and females in the HP populations defecated < 2 min postfeeding, compared with 4%-6% of the young nymphs and 1.3%-3% of females in the LP populations. Moreover, 17.7%-38.8% of the older nymphs (N4 to N5) in the HP populations and 6.8%-13.4% in the LP populations defecated during or immediately after feeding. Our results indicate that the HP populations have a greater potential than the LP populations to transmit T. cruzi infections, which may underlie the differences in the prevalence of T. cruzi infection in some areas where M. p. longipennis is currently distributed.
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Affiliation(s)
- José Alejandro Martínez-Ibarra
- Laboratorio de Entomología Médica, Centro Universitario del Sur, Universidad de Guadalajara, Ciudad Guzmán, Jalisco, México
- Cuerpo Académico de Cuencas, Humedales y Sustentabilidad, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Ciudad Guzmán, Jalisco, México
| | - Benjamín Nogueda-Torres
- Becario de COFAA, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, México
| | - Oziel Dante Montañez-Valdez
- Laboratorio de Entomología Médica, Centro Universitario del Sur, Universidad de Guadalajara, Ciudad Guzmán, Jalisco, México
- Cuerpo Académico de Cuencas, Humedales y Sustentabilidad, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Ciudad Guzmán, Jalisco, México
| | - J Guadalupe Michel-Parra
- Cuerpo Académico de Cuencas, Humedales y Sustentabilidad, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Ciudad Guzmán, Jalisco, México
| | - Miguel Ángel Ambriz-Santos
- Laboratorio de Entomología Médica, Centro Universitario del Sur, Universidad de Guadalajara, Ciudad Guzmán, Jalisco, México
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Waniek PJ, Araújo CAC, Jansen AM, Costa J. First genotyping of Trypanosoma cruzi from naturally infected Triatoma juazeirensis, Triatoma melanica and Triatoma sherlocki from Bahia State, Brazil. MEDICAL AND VETERINARY ENTOMOLOGY 2021; 35:134-140. [PMID: 32648329 DOI: 10.1111/mve.12459] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 05/04/2020] [Accepted: 05/27/2020] [Indexed: 06/11/2023]
Abstract
Many previous studies have shown a great phylogenetic and biological variability of Trypanosoma cruzi using different molecular and biochemical methods. Populations of T. cruzi were initially clustered into two main lineages called TcI and TcII by the size of the mini-exon PCR product. In the present study, 33 isolates derived from three triatomine taxa, which belong to the Triatoma brasiliensis species complex (Triatoma juazeirensis, Triatoma melanica and Triatoma sherlocki); collected in three distinct areas of Bahia state were characterized by PCR. The isolates were identified by the size of the mini-exon gene, 18S rRNA and 24Sα rRNA amplicons. T. cruzi isolates obtained in sylvatic and intradomiciliar ecotopes, derived from T. juazeirensis and T. melanica, were identified as TcI while the parasites originated from T. sherlocki were characterized as TcI and TcII genotypes, respectively. Those species are present in sylvatic ecotopes but are able to infest intradomiciliar areas. Therefore, it would be important to maintain studies in those localities of Bahia and further investigate the possibilities of Chagas disease transmission. Human disease may occur by any T. cruzi genotype and not only by TcII as it is the case in Amazonia.
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Affiliation(s)
- P J Waniek
- Laboratório de Biologia de Insetos, Departamento de Biologia Geral, Universidade Federal Fluminense, Rio de Janeiro, Brazil
- Laboratório de Biologia de Tripanosomatídeos, Instituto Oswaldo Cruz-FIOCRUZ, Rio de Janeiro, Brazil
| | - C A C Araújo
- Laboratório de Biologia de Insetos, Departamento de Biologia Geral, Universidade Federal Fluminense, Rio de Janeiro, Brazil
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz-FIOCRUZ, Rio de Janeiro, Brazil
| | - A M Jansen
- Laboratório de Biologia de Tripanosomatídeos, Instituto Oswaldo Cruz-FIOCRUZ, Rio de Janeiro, Brazil
| | - J Costa
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz-FIOCRUZ, Rio de Janeiro, Brazil
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Dynamics of feeding and defecation behavior of Triatoma infestans hybrids. Parasitol Res 2020; 119:2775-2781. [PMID: 32737590 DOI: 10.1007/s00436-020-06822-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 07/19/2020] [Indexed: 10/23/2022]
Abstract
Triatoma platensis is occasionally found coexisting with Triatoma infestans in chicken coops in Argentina. Some authors have reported the presence of hybrid specimens of both species in chicken coops and other peridomestic habitats. Given the coexistence of T. infestans with T. platensis and the possibility of generating fertile hybrids, it is important to evaluate the vectorial competence of these hybrids. The objective of this study was to record the dynamics of feeding-defecation behavior in fifth-stage nymphs and adults of hybrids between both species and to compare it with T. platensis and T. infestans. Three experimental groups were formed separated by stage and sex: Hybrid group, T. infestans group, and T. platensis group. During feeding, the following variables were recorded for each group: (i) blood meal size, (ii) feeding time, (iii) number of defecations during feeding, and (iv) number of defecations at 10 and 30 min after feeding. The results indicate that adults and fifth-instar nymphs of hybrids have a feeding and defecation behavior similar to T. infestans: they achieve feeding in a short time and first defecation occurs during or just after feeding. Nevertheless, hybrid's ingestion of blood occurs at higher velocity and they require higher blood intake to provoke early defecations. Considering the blood ingestion velocity, the amount of blood ingested, and the short time required for the production of the first defecation, the results of this study suggest that hybrid can be a competent Trypanosoma cruzi vector.
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Prezygotic isolation confirms the exclusion of Triatoma melanocephala, T. vitticeps and T. tibiamaculata of the T. brasiliensis subcomplex (Hemiptera, Triatominae). INFECTION GENETICS AND EVOLUTION 2020; 79:104149. [DOI: 10.1016/j.meegid.2019.104149] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 11/22/2022]
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Lilioso M, Pires-Silva D, von Hertwig Mascarenhas Fontes F, Oliveira J, da Rosa JA, Vilela RV, Folly-Ramos E, Almeida CE. Triatoma petrocchiae (Hemiptera, Reduviidae, Triatominae): A Chagas disease vector of T. brasiliensis species complex associated to reptiles. INFECTION GENETICS AND EVOLUTION 2020; 82:104307. [PMID: 32240799 DOI: 10.1016/j.meegid.2020.104307] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/12/2020] [Accepted: 03/28/2020] [Indexed: 11/25/2022]
Abstract
In semi-arid areas of northeastern Brazil, Chagas disease vectors of Triatoma brasiliensis species complex comprise a monophyletic group of kissing bugs that inhabit rock outcrops. Most of them exhibit allopatric or parapatric distribution; the exception is T. petrocchiae, which is found in cohabitation with T. brasiliensis in rock outcrops. We used vertebrate mitochondrial gene sequencing applied to DNA isolated from bug midgut to identify the insect blood meal sources via BLAST procedure. Fourteen sylvatic insects from four geographic districts in the states of Rio Grande do Norte and Paraíba had their blood meal sources detected. While T. brasiliensis is recorded to be associated mainly (52-71%) with rodents, T. petrocchiae samples were strongly associated (86%) with reptiles of Tropidurus and Hemidactylus genera. We suggest that T. petrocchiae is the single member within this complex to be associated with reptiles, indicating a distinct niche occupation related to the trophic resources.
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Affiliation(s)
- Maurício Lilioso
- Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Brazil.
| | - Dayane Pires-Silva
- Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Brazil
| | | | - Jader Oliveira
- Universidade Estadual Paulista "Júlio de Mesquita Filho", FCFAR/UNESP, Brazil
| | | | - Roberto V Vilela
- Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Brazil
| | - Elaine Folly-Ramos
- Programa de Pós-Graduação em Ecologia e Monitoramento Ambiental, Universidade Federal da Paraíba- UFPB, Campus IV, Brazil
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Molecular cytotaxonomy of the Triatoma brasiliensis species subcomplex (Hemiptera, Triatominae). Acta Trop 2020; 201:105225. [PMID: 31654646 DOI: 10.1016/j.actatropica.2019.105225] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 10/15/2019] [Accepted: 10/15/2019] [Indexed: 11/22/2022]
Abstract
The Triatoma genus is paraphyletic, and its species are grouped into complexes and subcomplexes. Given the fact that species that make up a given subcomplex generally share chromosomal traits, we analyzed the distribution of AT- and CG-rich DNA of the T. brasiliensis species subcomplex, in order to establish affinities among members of the T. brasiliensis subcomplex based on chromatin and chromosome traits and develop an identification key for the four monophyletic Triatoma subcomplexes from South America. All species exhibited a CG-rich X sex chromosome and autosomes, as well as an AT-rich Y sex chromosome. This feature can be used as a diagnostic characteristic to determine whether a given species is a member of the T. brasiliensis subcomplex, because it enables the differentiation of these species from all Triatoma of South America. Thus, we confirmed the chromosomal relationship of the T. brasiliensis species subcomplex and developed a dichotomous key based on the chromocenter to differentiate the species from this subcomplex from the other monophyletic Triatoma subcomplexes from South America.
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Valenzuela-Campos R, González-Rangel NS, Nogueda-Torres B, Rosal GGD, Martínez-Ibarra JA. Biological characteristics of Meccus phyllosomus pallidipennis (Hemiptera: Reduviidae: Triatominae) fed on two different hosts. Rev Soc Bras Med Trop 2019; 52:e20190020. [PMID: 31778398 DOI: 10.1590/0037-8682-0020-2019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 03/21/2019] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Different blood meal sources can affect biology of triatomines. METHODS We studied the influence of two different blood meal sources (rabbits and hens) on five biological parameters in Meccus phyllosomus pallidipennis and collected biological parameters. RESULTS The cohort fed on rabbits had a shorter median life-cycle and lower mortality rate than that fed on hens. Both cohorts required a similar number of blood meals to reach adulthood. Median longevity and number of blood meals for adults were similar between both cohorts. CONCLUSIONS The studied parameters reflect the high grade of adaptation of M. p. pallidipennis feeding on different hosts.
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Affiliation(s)
- Ricardo Valenzuela-Campos
- Universidad de Guadalajara, Centro Universitario del Sur, Laboratorio de Entomología Médica, Ciudad Guzman, Jalisco, México
| | - Neretva Sinaí González-Rangel
- Universidad de Guadalajara, Centro Universitario del Sur, Laboratorio de Entomología Médica, Ciudad Guzman, Jalisco, México
| | - Benjamín Nogueda-Torres
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Becario de COFAA, Departamento de Parasitología, Ciudad de México, México
| | - Gumercindo Goicochea-Del Rosal
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Laboratorio de Ecología de Vectores, Buenos Aires, Argentina
| | - José Alejandro Martínez-Ibarra
- Universidad de Guadalajara, Centro Universitario del Sur, Laboratorio de Entomología Médica, Ciudad Guzman, Jalisco, México
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Martínez-Ibarra JA, Nogueda-Torres B, Meraz-Medina T, Diaz-Chavez R, Virgen-Cobian CJ, Quirarte-Brambila M. Advantageous Feeding on Different Blood Meal Sources by the Chagas Disease Vector Triatoma barberi (Hemiptera: Reduviidae). JOURNAL OF MEDICAL ENTOMOLOGY 2019; 56:1565-1570. [PMID: 31227827 DOI: 10.1093/jme/tjz103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Indexed: 06/09/2023]
Abstract
Triatominae bugs (Hemiptera: Reduviidae) are usually associated with different vertebrate species, upon which many of them feed. Yet how these different blood meal sources influence key biological parameters is rarely investigated for triatomines. To fill this knowledge gap, this study sought to determine the effect of a domestic rat species (Rattus norvegicus Berkenhout (Rodentia: Muridae)), a domestic mice species (Mus musculus L. (Rodentia: Muridae)), and chickens (Gallus gallus domesticus L. (Galliformes: Phasianidae)), as blood meal sources upon several biological parameters (development time, number of required blood meals to moult and feeding and defecation behaviors) of the Mexican major vector Triatoma barberi Usinger. The three studied cohorts' development times were similar (325-338 d), but the number of required blood meals to moult (21), as well as the total mortality rate (26%), were both the highest in the cohort that fed on chickens. The longevity of females (186-190 d) was similar among the three studied cohorts, as was that of males. The median time elapsed between the presentation of a blood meal source and onset of feeding (10 min) was similar among the three studied cohorts, as were their feeding times and defecation patterns. Most of our studied parameters demonstrate how T. barberi can effectively take advantage of feeding on rodents as much as it does on hens. Those parameter results also show that T. barberi should be considered as a potential yet underappreciated vector in some areas, thus warranting a surveillance program of its current distribution area in Mexico.
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Affiliation(s)
- J A Martínez-Ibarra
- Laboratorio de Entomología Médica, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva, Ciudad Guzmán, Jalisco, México
| | - B Nogueda-Torres
- Becario de COFAA, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, México
| | - T Meraz-Medina
- Centro de Investigación en Biología Molecular de las Enfermedades Crónicas, Departamento de Ciencias Básicas para la Salud, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva, Ciudad Guzmán, Jalisco, México
| | - R Diaz-Chavez
- Laboratorio de Entomología Médica, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva, Ciudad Guzmán, Jalisco, México
| | - C J Virgen-Cobian
- Laboratorio de Entomología Médica, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva, Ciudad Guzmán, Jalisco, México
| | - M Quirarte-Brambila
- Laboratorio de Entomología Médica, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva, Ciudad Guzmán, Jalisco, México
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Martínez-Ibarra JA, Grant-Guillén Y, Nogueda-Torres B, Villagrán-Herrera ME, de Diego-Cabrera JA, Bustos-Saldaña R. Biological parameters of the triatomine, Meccus phyllosomus pallidipennis, fed on two bloodmeal sources under laboratory conditions. MEDICAL AND VETERINARY ENTOMOLOGY 2018; 32:497-503. [PMID: 30125962 DOI: 10.1111/mve.12332] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 06/26/2018] [Accepted: 07/09/2018] [Indexed: 06/08/2023]
Abstract
Chagas disease is one of the most important vector-borne diseases in Latin America, including Mexico. Meccus phyllosomus pallidipennis (Stål), 1872 (Hemiptera: Reduviidae) is a Mexican triatomine vector that is commonly associated with hens and rabbits. The biological parameters of two cohorts fed on hens (H) and on rabbits (R) were evaluated. The median lifecycles of the two cohorts were 198 days (H) and 180 days (R). Moreover, mortality was around 30% in both cohorts. Time lapse for beginning of feeding was 0.5-1.9 (H) and 1.1-2.4 min (R). Feeding times of each instar in both cohorts were over 10 min. Most specimens fed on hens defecated immediately after feeding, whereas those that fed on rabbits defecated within 1-5 min post-feeding. Similar numbers of males and females (50%) were obtained in both cohorts. An average of 2.1-2.3 eggs per female per day was noted in both cohorts, with eclosion rates of 95.4 (H) and 88.8% (R). Thus, it can be concluded that M. phyllosomus pallidipennis may take advantage of feeding in hens, as in rabbits, which could imply a higher risk of Trypanosoma cruzi transmission to humans and animals in its distribution area.
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Affiliation(s)
- J A Martínez-Ibarra
- Laboratory of Medical Entomology, Department of Natural Sciences, University of Guadalajara, Ciudad Guzman, Mexico
| | - Y Grant-Guillén
- Laboratory of Medical Entomology, Department of Natural Sciences, University of Guadalajara, Ciudad Guzman, Mexico
| | - B Nogueda-Torres
- Department of Parasitology, National School of Biological Sciences, National Polytechnic Institute, Casco de Santo Tomas, Mexico City, Mexico
| | - M E Villagrán-Herrera
- Department of Biomedical Research, School of Medicine, Autonomous University of Queretaro, Santiago de Queretaro, Mexico
| | - J A de Diego-Cabrera
- Unity of Parasitology and Tropical Medicine, Department of Preventive Medicine and Public Health, School of Medicine, Autonomous University of Madrid, Madrid, Spain
| | - R Bustos-Saldaña
- Department of Promotion, Preservation and Health Development, University of Guadalajara, Ciudad Guzman, Mexico
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Oliveira J, Marcet PL, Takiya DM, Mendonça VJ, Belintani T, Bargues MD, Mateo L, Chagas V, Folly-Ramos E, Cordeiro-Estrela P, Gurgel-Gonçalves R, Costa J, da Rosa JA, Almeida CE. Combined phylogenetic and morphometric information to delimit and unify the Triatoma brasiliensis species complex and the Brasiliensis subcomplex. Acta Trop 2017; 170:140-148. [PMID: 28219669 DOI: 10.1016/j.actatropica.2017.02.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 02/03/2017] [Accepted: 02/13/2017] [Indexed: 11/16/2022]
Abstract
"Triatoma brasiliensis species complex" was defined as a monophyletic group of the species: T. brasiliensis, T. juazeirensis, T. melanica, and T. sherlocki. An alternative grouping scheme proposed the concept of "Brasiliensis subcomplex" which included the former species together with T. melanocephala, T. petrocchiae, T. lenti, T. tibiamaculata, and T. vitticeps. To evaluate the relationship among these taxa we combined the results obtained with four mitochondrial genes (12S, 16S, COI and Cytb, adding to 1811bp) and geometric morphometric analysis of wings and heads. Panstrongylus megistus was included in the analysis as it was previously found related to T. tibiamaculata, T. melanocephala and T. vitticeps. The results of both molecular and morphometric approaches clearly grouped the species analyzed into two monophyletic units, supported by both genetic and wing variability. The first one (G1) comprises the four species originally included in the T. brasiliensis species complex plus T. lenti and T. petrocchiae. The second group (G2) was composed by T. melanocephala, T. tibiamaculata and T. vitticeps, and remarkably, P. megistus if considering wing variability and phylogenetic results. Nevertheless, geometric morphometrics of heads provided a quantitative measurement that discriminates Panstrongylus from the Triatoma species based on the position of the antennal insertion relative to eyes, as it is used as the generic distinctive character. The discrepancy among approaches questions the validity of this character to define Panstrongylus genus. Independently of the chosen group definition -"T. brasiliensis species complex" or "Brasiliensis subcomplex"-we propose to delimit it to species of G1 that are all associated with the Caatinga biome in the Brazilian Northeast. G2 are the ones associated with the Atlantic Forest biome.
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Affiliation(s)
- Jader Oliveira
- Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Brazil
| | - Paula L Marcet
- Division of Parasitic Diseases and Malaria, Centers for Diseases Control and Prevention, USA
| | | | | | - Tiago Belintani
- Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Brazil
| | | | | | | | | | | | | | - Jane Costa
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz, FIOCRUZ, Brazil
| | - João A da Rosa
- Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Brazil
| | - Carlos E Almeida
- Universidade Federal da Paraiba, Brazil; Universidade Estadual de Campinas, UNICAMP, Brazil.
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