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Martínez-Hernández F, Gonzalez-Arenas NR, Cervantes JAO, Villalobos G, Olivo-Diaz A, Rendon-Franco E, Maravilla P, Valdovinos MR, Muñoz-Garcia CI. Identification of SARS-CoV-2 in urban rodents from Southern Mexico City at the beginning of the COVID-19 pandemic. Rev Inst Med Trop Sao Paulo 2024; 66:e8. [PMID: 38324874 PMCID: PMC10846537 DOI: 10.1590/s1678-9946202466008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 12/08/2023] [Indexed: 02/09/2024] Open
Abstract
Currently, there are some concerns about the situation and, in particular, about the future of the COVID-19 pandemic and the new emerging variants of SARS-CoV-2. Rodents are an example of synanthropic animals in urban environments that harbor important zoonoses. Although the molecular identification of SARS-CoV-2 in Rattus norvegicus from New York City had been reported, in other studies, urban wild rodents infected with this virus have not been found. This study aimed to molecularly identify the presence of SARS-CoV-2 in urban wild rodents from Mexico City, trapped along a water channel of a public park as part of a pest control program, at the beginning of the COVID-19 pandemic, during the fall and winter of 2020. Up to 33 Mus musculus and 52 R. norvegicus were captured and euthanized, large intestine samples with feces from the animals were obtained. RNAs were obtained and subjected to qRT-PCR for SARS-CoV-2 identification and threshold cycle (Ct) values were obtained. Four mice (12.1%) and three rats (5.8%) were positive, three rodents exhibited Ct<30. Our results on the frequency of SARS-CoV-2 in urban rats are in line with other previous reports. Thus, similar to other authors, we suggest that surveillance for the detection of SARS-CoV-2 in urban wild rodents, as sentinel animals, should be maintained.
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Affiliation(s)
| | | | - José Antonio Ocampo Cervantes
- Universidad Autónoma Metropolitana, Centro de Investigaciones Biológicas y Acuícolas de Cuemanco, Ciudad de México, Mexico
| | - Guiehdani Villalobos
- Universidad Autónoma Metropolitana, Departamento de Producción Agrícola y Animal, Ciudad de México, Mexico
| | | | - Emilio Rendon-Franco
- Universidad Autónoma Metropolitana, Departamento de Producción Agrícola y Animal, Ciudad de México, Mexico
| | - Pablo Maravilla
- Hospital General “Dr. Manuel Gea González”, Ciudad de México, Mexico
| | - Mirza Romero Valdovinos
- Hospital General “Dr. Manuel Gea González”, Departamento de Biología Molecular e Histocompatibilidad, Laboratorio de Patógenos Emergentes, Ciudad de México, Mexico
| | - Claudia Irais Muñoz-Garcia
- Universidad Autónoma Metropolitana, Departamento de Producción Agrícola y Animal, Ciudad de México, Mexico
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Rangel-Gamboa L, González-Martínez EI, Sánchez-Cruz LC, Montiel-Rangel AI, Martínez-Hernández F. Trypanosoma cruzi DTU II coinfection with bacteria producing prolonged cutaneous lesion in a healthy young male. Rev Inst Med Trop Sao Paulo 2023; 65:e15. [PMID: 36921203 PMCID: PMC10013466 DOI: 10.1590/s1678-9946202365015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 01/09/2023] [Indexed: 03/15/2023] Open
Abstract
Chagas disease (CD) is a neglected tropical disease caused by Trypanosoma cruzi and is genetically classified in six discrete typing units (DTUs). The isolates reported in Mexico are generally associated with DTU I. We presented a case of a prolonged cutaneous lesion in a Mexican man, caused by DTU II in coinfection with Bacillus velezensis and Corynebacterium sp. The patient assessment included a complete clinical history, physical exam, laboratory tests, and a skin biopsy. In the facial tissues, intracellular parasites were revealed. The PCR tests were positive for T. cruzi in tissue and blood samples. DNA satellite sequencing was correlated with the DTU II. The initial serological tests reported negative results. However, four months later, two serological tests reported positive results. These exams were performed in different health centers. Mexico is considered an endemic area for CD; nevertheless, this is just the second cutaneous case associated with a DTU different from DTU-I noted in this country. From an ecological point of view, this fact suggests a geographical expansion of DTU II and an association with atypical skin manifestations. Further studies should be conducted to understand this exciting association between DTU-II and prolonged cutaneous expression in humans.
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Affiliation(s)
- Lucia Rangel-Gamboa
- Hospital General Dr. Manuel Gea González, Departamento de Ecología de Agentes Patógenos, Ciudad de México, Mexico.,Luminox Skin Centre, Dermatologic Department, Ciudad de México, Mexico
| | - Erik-Iyair González-Martínez
- Hospital General Dr. Manuel Gea González, Departamento de Ecología de Agentes Patógenos, Ciudad de México, Mexico
| | | | | | - Fernando Martínez-Hernández
- Hospital General Dr. Manuel Gea González, Departamento de Ecología de Agentes Patógenos, Ciudad de México, Mexico
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3
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Martínez-Hernández F, Villalobos G, Montañez-Valdez OD, Martínez-Ibarra JA. A New Record of the Introduced Species Triatoma infestans (Hemiptera: Reduviidae) in Mexico. J Med Entomol 2022; 59:2150-2157. [PMID: 35716079 DOI: 10.1093/jme/tjac078] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 02/24/2022] [Indexed: 06/15/2023]
Abstract
Here, we report a new record of Triatoma infestans (Klug) in Mexico after 50 years and provide a brief description of the discovery area. Fifty-nine specimens (71.2% adults) of the introduced species were collected from the peridomestic areas of a single house in the port of Manzanillo in the state of Colima, Mexico. Thirty-one specimens (52.5%) were collected from the exterior walls of the house and were apparently attracted to light. The other specimens (47.5%) were associated with chickens. No specimen was infected with Trypanosoma cruzi Chagas, the causative agent of Chagas disease, possibly because they were feeding on chickens. We speculate that the introduced species travelled from South America to Mexico via seed shipment in a twenty-foot equivalent unit (TEU) maritime container. Because Mexican phytosanitary regulations demand only the cargo to be inspected, the triatomines could have escaped notice during inspection. Subsequently, as the cargo was unloaded and the TEU was stored, the triatomines likely flew to and invaded the nearby residential areas. The rediscovery of this domestic vector of T. cruzi in Mexico warrants further investigation owing to the potential risk of transmission to the inhabitants of the study area.
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Affiliation(s)
- F Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General Dr. Manuel Gea González, C.P. 14080, Mexico City, Mexico
| | - G Villalobos
- Departamento de Ecología de Agentes Patógenos, Hospital General Dr. Manuel Gea González, C.P. 14080, Mexico City, Mexico
| | - O D Montañez-Valdez
- Cuerpo Académico de Cuencas, Humedales y Sustentabilidad, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000, Ciudad Guzmán, Jalisco, México
- Laboratorio de Entomología Médica, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000 Ciudad Guzmán, Jalisco, México
| | - J A Martínez-Ibarra
- Cuerpo Académico de Cuencas, Humedales y Sustentabilidad, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000, Ciudad Guzmán, Jalisco, México
- Laboratorio de Entomología Médica, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000 Ciudad Guzmán, Jalisco, México
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4
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Rivas N, Martínez-Hernández F, Antonio-Campos A, Sánchez-Cordero V, Alejandre-Aguilar R. Genetic diversity in peridomiciliary populations of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) in central Mexico. Parasitol Res 2022; 121:2875-2886. [PMID: 35930043 DOI: 10.1007/s00436-022-07608-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 07/22/2022] [Indexed: 11/28/2022]
Abstract
Triatoma mexicana is an important vector of Trypanosoma cruzi-the etiological agent of Chagas disease. This triatomine species occurs in central Mexico, but little is known about its genetic variability. Using Cyt-b gene as a genetic marker, in this study, we determined the population genetic structure of T. mexicana collected from the States of Hidalgo, Guanajuato, and Queretaro where populations are largely peridomiciliary. A Bayesian approach was performed for the design of phylogenies, median-joining networks, and clustering among populations of T. mexicana. Our results show that the Hidalgo population was the most distinct, with the highest genetic and haplotypic variation (Hd = 0.963, π = 0.06129, and ɵ = 0.05469). Moderate gene flow (Nm) was determined among populations of Hidalgo and Queretaro. Populations from the three states showed differentiation (FST) values ranging from 0.22 to 0.3, suggesting an important genetic differentiation. The phylogenetic analysis showed the presence of five well-defined groups, as well as the haplotype network, where 24 haplotypes were observed forming five haplogroups with high mutational steps among them: 68 (Hgo-W2), 26 (Qto), 59 (Hgo-M), 44 (Hgo-W1), and 46 (Gto). Genetic isolation was apparently inferred in the Guanajuato population; however, the Mantel test did not show correlation between genetic (FST) and geographic (km) distances (p = 0.05). The STRUCTURE analyses showed seven genetic clusters and it was observed that a single cluster predominates in each sampled location. However, genetic admixture was detected in four localities. Our results show evidence that there are multiple species within the collected sampling area.
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Affiliation(s)
- Nancy Rivas
- Laboratorio de Entomología Médica, Departamento de Parasitología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. Carpio Y Plan de Ayala S/N Col. Casco de Santo Tomas, C.P. 11340, Mexico City, CDMX, Mexico
| | - Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan 4800, CP 14080, Mexico City, CDMX, Mexico
| | - Alberto Antonio-Campos
- Laboratorio de Entomología Médica, Departamento de Parasitología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. Carpio Y Plan de Ayala S/N Col. Casco de Santo Tomas, C.P. 11340, Mexico City, CDMX, Mexico.,Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Copilco 3000, Ciudad Universitaria, Coyoacán, 04510, Mexico City, CDMX, Mexico
| | - Víctor Sánchez-Cordero
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Copilco 3000, Ciudad Universitaria, Coyoacán, 04510, Mexico City, CDMX, Mexico
| | - Ricardo Alejandre-Aguilar
- Laboratorio de Entomología Médica, Departamento de Parasitología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. Carpio Y Plan de Ayala S/N Col. Casco de Santo Tomas, C.P. 11340, Mexico City, CDMX, Mexico.
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Martínez-Ocaña J, Martínez-Flores WA, Olivo-Díaz A, Romero-Valdovinos M, Martínez-Hernández F, Aguilar-Osorio G, Flisser A, Maravilla P. Identification of α-L-fucosidase (ALFuc) of Blastocystis sp. subtypes ST1, ST2 and ST3. Rev Inst Med Trop Sao Paulo 2022; 64:e40. [PMID: 35703609 PMCID: PMC9190516 DOI: 10.1590/s1678-9946202264040] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 04/25/2022] [Indexed: 12/03/2022] Open
Abstract
Blastocystis sp. is a common intestinal microorganism. The α-L-fucosidase (ALFuc) is an enzyme long associated with the colonization of the gut microbiota. However, this enzyme has not been experimentally identified in Blastocystis cultures. The objective of the present study was to identify ALFuc in supernatants of axenic cultures of Blastocystis subtype (ST)1 ATCC-50177 and ATCC-50610 and to compare predicted ALFuc proteins of alfuc genes in sequenced STs1–3 isolates in human Blastocystis carriers. Excretion/secretion (Es/p) and cell lysate proteins were obtained by processing Blastocystis ATCC cultures and submitting them to SDS–PAGE and immunoblotting. In addition, 18 fecal samples from symptomatic Blastocystis human carriers were analyzed by sequencing of amplification products for subtyping. A complete identification of the alfuc gene and phylogenetic analysis were performed. Immunoblotting showed that the amplified band corresponding to ALFuc (~51 kDa) was recognized only in the ES/p. Furthermore, prediction analysis of ALFuc 3D structures revealed that the domain α-L-fucosidase and the GH29 family's catalytic sites were conserved; interestingly, the galactose-binding domain was recognized only in ST1 and ST2. The phylogenetic inferences of ALFuc showed that STs1–3 were clearly identifiable and grouped into specific clusters. Our results show, for the first time through experimental data that ALFuc is a secretion product of Blastocystis sp., which could have a relevant role during intestinal colonization; however, further studies are required to clarify this condition. Furthermore, the alfuc gene is a promising candidate for a phylogenetic marker, as it shows a conserved classification with the SSU-rDNA gene.
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Affiliation(s)
- Joel Martínez-Ocaña
- Hospital General "Dr. Manuel Gea Gonzalez", Departamento de Ecología de Agentes Patógenos, Ciudad de México, México
| | | | - Angélica Olivo-Díaz
- Hospital General "Dr. Manuel Gea Gonzalez", Departamento de Ecología de Agentes Patógenos, Ciudad de México, México
| | - Mirza Romero-Valdovinos
- Hospital General "Dr. Manuel Gea Gonzalez", Departamento de Ecología de Agentes Patógenos, Ciudad de México, México
| | - Fernando Martínez-Hernández
- Hospital General "Dr. Manuel Gea Gonzalez", Departamento de Ecología de Agentes Patógenos, Ciudad de México, México
| | | | - Ana Flisser
- Universidad Autonoma de México, Facultad de Medicina, Departamento de Microbiologia y Parasitologia, Ciudad de México, México
| | - Pablo Maravilla
- Hospital General "Dr. Manuel Gea Gonzalez", Departamento de Ecología de Agentes Patógenos, Ciudad de México, México
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6
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Limón-González MM, Hernández-Castro R, Martínez-Hernández F, Xicohtencatl-Cortes J, Ramírez-Alvarez H, Palomares-Resendiz EG, Díaz-Aparicio E. Genetic diversity of Chlamydia pecorum detected in sheep flocks from Mexico. Braz J Microbiol 2022. [DOI: https:/doi.org/10.1007/s42770-022-00682-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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7
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Periche Fernández JD, Pou-Soarez V, Arenas R, Juárez-Duran ER, Luna-Rojas SL, Xicohtencatl-Cortes J, Martínez-Chavarría LC, Martínez-Hernández F, Hernández-Castro R. Mycobacterium leprae and Mycobacterium lepromatosis infection. A report of six multibacillary cases of leprosy in Dominican Republic. Jpn J Infect Dis 2022; 75:427-430. [PMID: 35354704 DOI: 10.7883/yoken.jjid.2021.709] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The causative agents of leprosy are Mycobacterium leprae and Mycobacterium lepromatosis. M. lepromatosis was found in 2008 to cause diffuse lepromatous leprosy in Mexican patients. The objective of this work was to identify M. leprae and M. lepromatosis in paraffin-embedded skin samples from Caribbean leprosy patients. A total of 6 skin samples were obtained from the Dominican Republic. All cases presented the multibacillary form; 5 cases were nodular lepromatous leprosy, and 1 case was borderline lepromatous leprosy. All patients received multidrug therapy. Molecular identification was achieved using the M. leprae-specific repetitive element (RLEP) for M. leprae and the hemN gene for M. lepromatosis. Mycobacterium leprae was identified in two lepromatous leprosy cases and 1 borderline lepromatous leprosy case; M. lepromatosis was found in 1 nodular lepromatous leprosy case. Both Mycobacterium species were present in two nodular lepromatous leprosy cases. This is the first report of M. lepromatosis in the Dominican Republic.
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Affiliation(s)
| | - Víctor Pou-Soarez
- Dominican Dermatological Institute and Skin Surgery Dr. Huberto Bogaert, Dominican Republic
| | - Roberto Arenas
- Mycology Service, General Hospital Dr. Manuel Gea González, Mexico
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8
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Limón-González MM, Hernández-Castro R, Martínez-Hernández F, Xicohtencatl-Cortes J, Ramírez-Alvarez H, Palomares-Resendiz EG, Díaz-Aparicio E. Genetic diversity of Chlamydia pecorum detected in sheep flocks from Mexico. Braz J Microbiol 2022. [DOI: https://doi.org/10.1007/s42770-022-00682-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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9
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Limón-González MM, Hernández-Castro R, Martínez-Hernández F, Xicohtencatl-Cortes J, Ramírez-Alvarez H, Palomares-Resendiz EG, Díaz-Aparicio E. Genetic diversity of Chlamydia pecorum detected in sheep flocks from Mexico. Braz J Microbiol 2022; 53:605-613. [PMID: 35119684 PMCID: PMC9151965 DOI: 10.1007/s42770-022-00682-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 01/13/2022] [Indexed: 02/06/2023] Open
Abstract
Chlamydia pecorum, an obligate intracellular bacterium, is associated with reproductive and systemic diseases in sheep, goats, pigs, cattle, and koalas. The main conditions include polyarthritis, conjunctivitis, enteritis, pneumonia, encephalomyelitis, orchitis, placentitis, and abortion. Even though there are several studies showing that C. pecorum infections are widely spread in the world, in Mexico there are no reports. During 2016, as part of a sheep restocking program in Mexico, sheep were imported from New Zealand. Briefly after their arrival in the herds in the State of Mexico, these sheep presented abortions during the last third of gestation. A total of 62 sheep vaginal swabs that had presented abortion from different municipalities of the State of Mexico were collected. Bacterial isolation was performed using L929 mouse fibroblasts, and molecular identification was achieved by 23S rRNA (Chlamydiaceae family) and ompA gene (species-specific) real-time polymerase chain reaction (PCR). In addition, the 16S rRNA subunit and ompA gene were amplified and sequenced. Seven of 62 samples were positive for C. pecorum by bacterial isolation, 23S rRNA, and ompA gene real-time PCR. The 16S rRNA subunit and ompA gene amplicons were purified and the nucleotide sequence was determined in both directions. The consensus sequences homology search was performed using BLASTn analysis and showed a 100% of homology with the C. pecorum 16S rRNA subunit and 99% with the C. pecorum ompA gene. The population structure analyses using ompA gene demonstrated 15 genetic populations or clusters of 198 sequences from GenBank and our sequences were in a particular genetic structure corresponding to genotype "O." Herein, we describe the presence of C. pecorum in sheep imported from New Zealand into Mexico. Genetic analysis of the ompA gene showed that the isolates belong to genotype O and are related to strains isolated from sheep, cattle, and koalas.
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Affiliation(s)
- M M Limón-González
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Coyoacán, 04510, Ciudad de México, Mexico.
| | - R Hernández-Castro
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Tlalpan, 14080, Ciudad de México, Mexico
| | - F Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Tlalpan, 14080, Ciudad de México, Mexico
| | - J Xicohtencatl-Cortes
- Laboratorio de Bacteriología Intestinal, Hospital Infantil de México "Dr. Federico Gómez", Cuauhtémoc, 06720, Ciudad de México, Mexico
| | - H Ramírez-Alvarez
- Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, 54714, Cuautitlán Izcalli, Estado de México, Mexico
| | - E G Palomares-Resendiz
- Centro Nacional de Investigación Disciplinaria en Salud Animal e Inocuidad (CENID-SAI), Instituto Nacional de Investigaciones ForestalesAgrícolas y Pecuarias, Cuajimalpa, 05110, Ciudad de México, Mexico
| | - E Díaz-Aparicio
- Centro Nacional de Investigación Disciplinaria en Salud Animal e Inocuidad (CENID-SAI), Instituto Nacional de Investigaciones ForestalesAgrícolas y Pecuarias, Cuajimalpa, 05110, Ciudad de México, Mexico
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Martínez-Hernández F, Villalobos G, Montañez-Valdez OD, Martínez-Ibarra JA. New finding of peridomestic Triatoma infestans (Klug, 1834) (Hemiptera: Reduviidae) in Mexico: Molecular approach using cytochrome B and cytochrome oxidase I. Infect Genet Evol 2022; 97:105187. [PMID: 34920101 DOI: 10.1016/j.meegid.2021.105187] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/07/2021] [Accepted: 12/11/2021] [Indexed: 10/19/2022]
Abstract
A previous work morphologically identified some specimens colonizing peridomestic sites of Manzanillo Colima, Mexico, as Triatoma infestans (Klug). In the present study, a molecular approach using cytochrome B and cytochrome oxidase I was implemented for the genetic identification and determination of the origin of that population. Phylogenetic analyses positively identified our studied specimens as belonging to the T. infestans clade based on genetic markers with high posterior probability values, and the haplotype network showed Uruguay, Chile and Argentina as probable countries of origin of the populations in Mexico, which was supported by gene flow and migration index analyses. Due to the proximity of the port of Manzanillo to the collection sites, the introduced specimens were hypothesized to have travelled from the countries of origin to Mexico in a seed shipment inside a TEU (twenty-foot equivalent unit) maritime container. The identification of T. infestans in Mexico represents a serious health problem, and the findings presented here indicate a novel pathway for displacing this vector with the possibility of transmission to any other part of the world, which should be further investigated.
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Affiliation(s)
- Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General Dr. Manuel Gea González, C.P. 14080, Mexico City, Mexico
| | - Guiehdani Villalobos
- Departamento de Ecología de Agentes Patógenos, Hospital General Dr. Manuel Gea González, C.P. 14080, Mexico City, Mexico
| | - Oziel Dante Montañez-Valdez
- Cuerpo Académico de Cuencas, Humedales y Sustentabilidad Cuerpo, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000 Ciudad Guzmán, Jalisco, Mexico; Laboratorio de Entomología Médica, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000 Ciudad Guzmán, Jalisco, Mexico
| | - José Alejandro Martínez-Ibarra
- Cuerpo Académico de Cuencas, Humedales y Sustentabilidad Cuerpo, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000 Ciudad Guzmán, Jalisco, Mexico; Laboratorio de Entomología Médica, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000 Ciudad Guzmán, Jalisco, Mexico.
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11
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León-Lara X, Atoche C, Arenas R, Martínez-Hernández F, Martínez-Chavarría LC, Xicohtencatl-Cortes J, Vázquez-Aceituno VA, Hernández-Castro R. Cyphellophora laciniata: A new etiological agent of chromoblastomycosis. J Mycol Med 2021; 32:101204. [PMID: 34598111 DOI: 10.1016/j.mycmed.2021.101204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 09/02/2021] [Accepted: 09/03/2021] [Indexed: 11/30/2022]
Abstract
Chromoblastomycosis is a chronic subcutaneous mycosis caused by traumatic inoculation of dematiaceous fungi especially in tropical and subtropical areas. Cyphellophora genus include melanized fungi reported as etiological agents of skin and nail infections. We report a 60-year-old male from the south of Mexico with a 40-year history of chromoblastomycosis caused by Cyphellophora laciniata. The isolated fungus was identified by sequencing of the internal transcribed spacer region of rDNA. The patient was treated with itraconazole and cryosurgery with unsatisfactory results.
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Affiliation(s)
- Ximena León-Lara
- Sección de Micología, Hospital General "Dr. Manuel Gea González", Tlalpan 14080, Ciudad de México, México
| | - Carlos Atoche
- Laboratorio de Micología, Centro Dermatológico "Dr. Fernando Latapi", Yucatán 97000, México
| | - Roberto Arenas
- Sección de Micología, Hospital General "Dr. Manuel Gea González", Tlalpan 14080, Ciudad de México, México
| | - Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos. Hospital General "Dr. Manuel Gea González", Tlalpan 14080. Ciudad de México, México
| | - Luary C Martínez-Chavarría
- Departamento de Patología, Facultad de Medicina Veterinaria y Zootecnia. Universidad Nacional Autónoma de México, 04510 Coyoacán, Ciudad de México, México
| | - Juan Xicohtencatl-Cortes
- Laboratorio de Bacteriología Intestinal, Hospital Infantil de México "Dr. Federico Gómez", Cuauhtémoc 06720, Ciudad de México, México
| | - Víctor A Vázquez-Aceituno
- Departamento de Ecología de Agentes Patógenos. Hospital General "Dr. Manuel Gea González", Tlalpan 14080. Ciudad de México, México
| | - Rigoberto Hernández-Castro
- Departamento de Ecología de Agentes Patógenos. Hospital General "Dr. Manuel Gea González", Tlalpan 14080. Ciudad de México, México.
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Campos-Macias P, Arenas R, Aquino CJ, Romero-Navarrete M, Martínez-Hernández F, Martínez-Chavarría LC, Xicohtencatl-Cortes J, Hernández-Castro R. Chromoblastomycosis caused by Fonsecaea monophora in Mexico. J Mycol Med 2021; 31:101114. [PMID: 33684836 DOI: 10.1016/j.mycmed.2021.101114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/01/2020] [Accepted: 01/15/2021] [Indexed: 12/19/2022]
Abstract
Chromoblastomycosis is a chronic subcutaneous fungal infection caused by melanized fungi. It is usually an occupational mycosis affecting people in rural areas in tropical and subtropical regions. We present two cases of chromoblastomycosis in Mexican farmers, characterized by skin verrucous plaques. Direct examination with KOH 10% showed the presence of muriform cells. The fungal isolation was carried out in Sabouraud dextrose agar and molecular identification was achieved by 18S-ITS1-5.8S-ITS2-28S rRNA gene amplification and sequencing. Fonsecaeamonophora was identified in both cases. A therapy with itraconazole and terbinafine was used with a partial favorable response. However, patients did not return for medical examination after 4 months. The current status of the patients is unknown. We reported the first two cases of chromoblastomycosis caused by F. monophora in Mexico.
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Affiliation(s)
- Pablo Campos-Macias
- Facultad de Medicina, Hospital Aranda de la Parra, Universidad de Guanajuato, 37000 León, Guanajuato. Mexico
| | - Roberto Arenas
- Servicio de Micología, Hospital General "Dr. Manuel Gea González", 14080 Tlalpan, Ciudad de México, Mexico
| | - Caren J Aquino
- Centro Dermatológico del Sureste "Dr. Fernando Latapí", 29000 Tuxtla Gutiérrez, Chiapas. Mexico
| | | | - Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos. Hospital General "Dr. Manuel Gea González", 14080 Tlalpan, Ciudad de México, Mexico
| | - Luary C Martínez-Chavarría
- Departamento de Patología, Facultad de Medicina Veterinaria y Zootecnia. Universidad Nacional Autónoma de México, 04510 Coyoacán, Ciudad de México, Mexico
| | - Juan Xicohtencatl-Cortes
- Laboratorio de Bacteriología Intestinal, Hospital Infantil de México "Dr. Federico Gómez", 06720 Cuauhtémoc, Ciudad de México, Mexico
| | - Rigoberto Hernández-Castro
- Departamento de Ecología de Agentes Patógenos. Hospital General "Dr. Manuel Gea González", 14080 Tlalpan, Ciudad de México, Mexico.
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13
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Martínez-Hernández F, Isaak-Delgado AB, Alfonso-Toledo JA, Muñoz-García CI, Villalobos G, Aréchiga-Ceballos N, Rendón-Franco E. Assessing the SARS-CoV-2 threat to wildlife: Potential risk to a broad range of mammals. Perspect Ecol Conserv 2020; 18:223-234. [PMID: 33043253 PMCID: PMC7534737 DOI: 10.1016/j.pecon.2020.09.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 09/28/2020] [Indexed: 12/30/2022] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) can infect animals, however, the whole range of potential hosts is still unknown. This work makes an assessment of wildlife susceptibility to SARS-CoV-2 by analyzing the similarities of Angiotensin Converting Enzyme 2 (ACE2) and Transmembrane Protease, Serine 2 (TMPRSS2)—both recognized as receptors and protease for coronavirus spike protein—and the genetic variation of the viral protein spike in the recognition sites. The sequences from different mammals, birds, reptiles, and amphibians, and the sequence from SARS-CoV-2 S protein were obtained from the GenBank. Comparisons of aligned sequences were made by selecting amino acids residues of ACE2, TMPRSS2 and S protein; phylogenetic trees were reconstructed using the same sequences. The species susceptibility was ranked by substituting the values of amino acid residues for both proteins. Our results ranked primates at the top, but surprisingly, just below are carnivores, cetaceans and wild rodents, showing a relatively high potential risk, as opposed to lab rodents that are typically mammals at lower risk. Most of the sequences from birds, reptiles and amphibians occupied the lowest ranges in the analyses. Models and phylogenetic trees outputs showed the species that are more prone to getting infected with SARS-CoV-2. Interestingly, during this short pandemic period, a high haplotypic variation was observed in the RBD of the viral S protein, suggesting new risks for other hosts. Our findings are consistent with other published results reporting laboratory and natural infections in different species. Finally, urgent measures of wildlife monitoring are needed regarding SARS-CoV-2, as well as measures for avoiding or limiting human contact with wildlife, and precautionary measures to protect wildlife workers and researchers; monitoring disposal of waste and sewage than can potentially affect the environment, and designing protocols for dealing with the outbreak.
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Affiliation(s)
- Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan #4800, Tlalpan, 14080 Mexico City, Mexico
| | - Ana Belem Isaak-Delgado
- Departamento de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Av. Universidad #3000, Coyoacán, 04510 Mexico City, Mexico
| | - Jorge Alberto Alfonso-Toledo
- Unidad de Posgrado, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Av. Universidad #3000, Coyoacán, 04510 Mexico City, Mexico
| | - Claudia Irais Muñoz-García
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Calzada del Hueso #1100, Col. Villa Quietud, Coyoacán, 04960 Mexico City, Mexico
| | - Guiehdani Villalobos
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan #4800, Tlalpan, 14080 Mexico City, Mexico
| | - Nidia Aréchiga-Ceballos
- Laboratorio de Rabia, Instituto de Diagnóstico y Referencia Epidemiológicos, Francisco de P. Miranda 177, Lomas de Plateros, Álvaro Obregón, 01480 Mexico City, Mexico
| | - Emilio Rendón-Franco
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Calzada del Hueso #1100, Col. Villa Quietud, Coyoacán, 04960 Mexico City, Mexico
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14
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Rodríguez-Cabo-Mercado R, Martínez-Hernández F, Aréchiga-Ceballos N, López-Díaz O, Muñoz-García CI, Aguilar-Setién A, Villalobos G, Villanueva-García C, Verdugo-Rodríguez A, Iturbe-Ramírez R, Rendón-Franco E. Canine distemper in neotropical procyonids: Molecular evidence, humoral immune response and epidemiology. Virus Res 2020; 290:198164. [PMID: 32949657 DOI: 10.1016/j.virusres.2020.198164] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 09/03/2020] [Accepted: 09/08/2020] [Indexed: 10/23/2022]
Abstract
Canine Distemper Virus (CDV) can produce a fatal multisystem disease in carnivores and other mammals and is an important threat for wildlife conservation. However, integrative and comparative studies in wild carnivores are scarce and some areas of the world lack of genetic studies. We explore the dynamic of host-CDV in a procyonid community during an outbreak. This study reports for the first time an index case occurred in a common raccoon (Procyon lotor) and for which a complete CDV diagnosis was performed. The long-term epidemiological analysis in two sympatric populations of common raccoons and white-nosed coatis (Nasua narica) was achieved through seroneutralization, RT-PCR and direct immunofluorescence assays. Additionally, hematologic analyses were performed and phylogenetic reconstruction of CDV was done using molecular data from this study. Overall prevalence for white-nosed coatis was 19.6 % and for common raccoons was 25.3 % by seroneutralization, and 13.3 % and 17.3 % by RT-PCR. Antibodies titer average for white-nosed coatis was 1:512 and 1:156 for common raccoons. Significant difference in prevalence between white-nosed coatis and common raccoons was detected during one season (summer 2013). White-nosed coatis showed differences in erythrocytes and monocytes counts between positives and negative animals. A 100 % similarity was found between CDV of white-nosed coati and CDV of common raccoon and is a new CDV sequence not previously described; this sequence is close to Asian and European lineage. An endemic state of distemper in both species was observed but showed different dynamics over time per host species. Differences in cellular and humoral responses were also detected between procyonids. The evidence found here may have serious implications for CDV understanding in wild carnivores, it reveals clear differences in the response over time to the same CDV strain, in two close related carnivore species.
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Affiliation(s)
| | - Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General Dr. Manuel Gea González, Mexico City, Mexico
| | - Nidia Aréchiga-Ceballos
- Laboratorio de Rabia. Departamento de Virología, Instituto de Diagnóstico y Referencia Epidemiológicos, Mexico City, Mexico
| | - Osvaldo López-Díaz
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana-Unidad Xochimilco, Mexico City, Mexico
| | - Claudia Irais Muñoz-García
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana-Unidad Xochimilco, Mexico City, Mexico
| | - Alvaro Aguilar-Setién
- Centro Médico Nacional siglo XXI Instituto Mexicano de Seguro Social Mexico City, Mexico
| | - Guiehdani Villalobos
- Departamento de Ecología de Agentes Patógenos, Hospital General Dr. Manuel Gea González, Mexico City, Mexico
| | - Claudia Villanueva-García
- División Académica de Ciencias Biológicas, Laboratorio de Ecología del Paisaje y Cambio Global, Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, Mexico
| | - Antonio Verdugo-Rodríguez
- Facultad de Medicina Veterinaria y Zootecnia Universidad Nacional Autónoma de México Mexico City, Mexico
| | - Raymundo Iturbe-Ramírez
- Facultad de Medicina Veterinaria y Zootecnia Universidad Nacional Autónoma de México Mexico City, Mexico
| | - Emilio Rendón-Franco
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana-Unidad Xochimilco, Mexico City, Mexico.
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15
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Isaak-Delgado AB, López-Díaz O, Romero-Callejas E, Martínez-Hernández F, Muñoz-García CI, Villalobos G, Rendón-Franco E. Morphological and molecular characteristics of hemoparasites in vaillant's frogs (Lithobates vaillanti). Parasitol Res 2020; 119:1891-1901. [PMID: 32382990 DOI: 10.1007/s00436-020-06689-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 04/15/2020] [Indexed: 11/25/2022]
Abstract
Amphibian populations are declining around the world, and the main reasons are the environmental changes and pathogens. However, there are few studies addressing the interaction and impact of the different pathogens that affect amphibians, such as hemoparasites. These parasites had been described as common in some amphibian species, but unfortunately, their description and characterization are unclear and scarcely spread. The objective of the present study was to evaluate the morphological and molecular characterization of hemoparasites present in vaillant's frogs. Seven frogs of Lithobates vaillanti were captured at the biological station La Florida in Tabasco, Mexico. Blood smears were performed, and results show that 100% of the animals have hemoparasites. Three types of hemoparasites were found. Eighty-five percent of the frogs were positive to Hepatozoon sp., 57% to Lankesterella sp., and 28% to Trypanosoma sp. According to the molecular analysis of the obtained sequences of Trypanosoma sp. and Hepatozoon sp., both protozoans were positioned in between the clusters of parasites of different geographical regions. Nevertheless, no species names were assigned to any of these parasites because more sequences and analysis are needed.
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Affiliation(s)
- Ana Belem Isaak-Delgado
- Departamento de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de Mexico, Mexico
| | - Osvaldo López-Díaz
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana-Unidad Xochimilco, Ciudad de Mexico, Mexico
| | - Evangelina Romero-Callejas
- Departamento de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de Mexico, Mexico
| | | | - Claudia I Muñoz-García
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana-Unidad Xochimilco, Ciudad de Mexico, Mexico
| | - Guiehdani Villalobos
- Departamento de Agentes Patógenos, Hospital General Dr. Manuel Gea González, Ciudad de Mexico, Mexico.
| | - Emilio Rendón-Franco
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana-Unidad Xochimilco, Ciudad de Mexico, Mexico.
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16
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Avila G, Cruz-Licea V, Rojas-Espinosa K, Bermúdez-Álvarez Y, Grostieta E, Romero-Valdovinos M, Martínez-Hernández F, Vaughan G, Flisser A. Influenza A H1N1 Virus 2009 Synthetic Hemagglutinin and Neuraminidase Peptides for Antibody Detection. Arch Med Res 2020; 51:436-443. [PMID: 32362450 DOI: 10.1016/j.arcmed.2020.04.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 03/03/2020] [Accepted: 04/13/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Influenza serologic diagnosis is mainly based on hemagglutination inhibition and microneutralization methods, both methods require handling living viruses under an enhanced biosafety level. AIM The current study was performed for developing an ELISA using synthetic peptides to detect influenza A H1N1 virus 2009 specific antibodies in serum and saliva. METHODS Alignments were made with H1N1 hemagglutinin and neuraminidase (HA and NA, respectively) sequences; only conserved sites were used for antigenicity prediction. Two synthetic peptides were assayed; one of neuraminidase (NA15) and one of hemagglutinin (HA-15) and used in ELISA for detecting IgG and IgA antibodies. A cross-sectional study was performed in three municipalities of Mexico City, using negative samples collected before the 2009 influenza outbreak, samples of people who became ill during the outbreak, and samples of the participants in the epidemiological study with or without symptoms. RESULTS The determination of serum IgG antibodies with both peptides allowed differentiating between the post outbreak groups with respect to all others. No differences were found in IgA determination in saliva against both peptides. The frequency of positive participants for NA-15 was 9.5 and 8.8% for HA-15 in serum IgG; whereas the frequency of positive participants for NA-15 was 11%, and for HA-15 was 8.6% for saliva IgA. CONCLUSIONS Synthetic peptides of the neuraminidase and hemagglutinin proteins can be used in ELISA for the determination of IgG and IgA antibodies against the influenza A H1N1 virus 2009.
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Affiliation(s)
- Guillermina Avila
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Verónica Cruz-Licea
- Departamento de Salud Pública, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Karla Rojas-Espinosa
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Yesenia Bermúdez-Álvarez
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Estefanía Grostieta
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | | | | | - Gilberto Vaughan
- Facultad de Ciencias de la Salud, Universidad Anáhuac México Norte, Huixquilucan, Estado de México, México
| | - Ana Flisser
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México.
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17
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Rangel-Gamboa L, López-García L, Moreno-Sánchez F, Hoyo-Ulloa I, Vega-Mémije ME, Mendoza-Bazán N, Romero-Valdovinos M, Olivo-Díaz A, Villalobos G, Martínez-Hernández F. Trypanosoma cruzi infection associated with atypical clinical manifestation during the acute phase of the Chagas disease. Parasit Vectors 2019; 12:506. [PMID: 31666114 PMCID: PMC6822409 DOI: 10.1186/s13071-019-3766-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 10/23/2019] [Indexed: 12/28/2022] Open
Abstract
Background Chagas disease (CD) is caused by the protozoan parasite Trypanosoma cruzi and is transmitted by triatomine insects. Clinical manifestations vary according to the phase of the disease. Cutaneous manifestations are usually observed in the acute phase (chagoma and Romaña’s sign) or after reactivation of the chronic phase by immunosuppression; however, a disseminated infection in the acute phase without immunosuppression has not been reported for CD. Here, we report an unusual case of disseminated cutaneous infection during the acute phase of CD in a Mexican woman. Methods Evaluation of the patient included a complete clinical history, a physical exam, and an exhaustive evaluation by laboratory tests, including ELISA, Western blot and PCR. Results Skin biopsies of a 50-year-old female revealed intracellular parasites affecting the lower extremities with lymphangitic spread in both legs. The PCR tests evaluated biopsy samples obtained from the lesions and blood samples, which showed a positive diagnosis for T. cruzi. Partial sequencing of the small subunit ribosomal DNA correlated with the genetic variant DTU II; however, serological tests were negative. Conclusions We present a case of CD with disseminated skin lesions that was detected by PCR and showed negative serological results. In Mexico, an endemic CD area, there are no records of this type of manifestation, which demonstrates the ability of the parasite to initiate and maintain infections in atypical tissues .
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Affiliation(s)
- Lucia Rangel-Gamboa
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan 4800, CP 14080, Mexico City, Mexico
| | - Lirio López-García
- Private Practice, Dermatología clínica, Lomas Altas, Mexico City, Mexico
| | | | - Irma Hoyo-Ulloa
- Departamento de Infectología, Centro Médico ABC, Mexico City, Mexico
| | - María Elisa Vega-Mémije
- Departamento de Dermatopatología, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan 4800, CP 14080, Mexico City, Mexico
| | - Nancy Mendoza-Bazán
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan 4800, CP 14080, Mexico City, Mexico
| | - Mirza Romero-Valdovinos
- Departamento de Genética e Histocompatibilidad, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan 4800, CP 14080, Mexico City, Mexico
| | - Angélica Olivo-Díaz
- Departamento de Genética e Histocompatibilidad, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan 4800, CP 14080, Mexico City, Mexico
| | - Guiehdani Villalobos
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan 4800, CP 14080, Mexico City, Mexico.
| | - Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan 4800, CP 14080, Mexico City, Mexico.
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18
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Villalobos G, Nava-Bolaños A, De Fuentes-Vicente JA, Téllez-Rendón JL, Huerta H, Martínez-Hernández F, Rocha-Ortega M, Gutiérrez-Cabrera AE, Ibarra-Cerdeña CN, Córdoba-Aguilar A. A reduction in ecological niche for Trypanosoma cruzi-infected triatomine bugs. Parasit Vectors 2019; 12:240. [PMID: 31097007 PMCID: PMC6524312 DOI: 10.1186/s13071-019-3489-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 05/06/2019] [Indexed: 01/20/2023] Open
Abstract
Background Theory predicts that parasites can affect and thus drive their hosts’ niche. Testing this prediction is key, especially for vector-borne diseases including Chagas disease. Here, we examined the niche use of seven triatomine species that occur in Mexico, based on whether they are infected or not with Trypanosoma cruzi, the vectors and causative parasites of Chagas disease, respectively. Presence data for seven species of triatomines (Triatoma barberi, T. dimidiata, T. longipennis, T. mazzottii, T. pallidipennis, T. phyllosoma and T. picturata) were used and divided into populations infected and not infected by T. cruzi. Species distribution models were generated with Maxent 3.3.3k. Using distribution models, niche analysis tests of amplitude and distance to centroids were carried out for infected vs non-infected populations within species. Results Infected populations of bugs of six out of the seven triatomine species showed a reduced ecological space compared to non-infected populations. In all but one case (T. pallidipennis), the niche used by infected populations was close to the niche centroid of its insect host. Conclusions Trypanosoma cruzi may have selected for a restricted niche amplitude in triatomines, although we are unaware of the underlying reasons. Possibly the fact that T. cruzi infection bears a fitness cost for triatomines is what narrows the niche breadth of the insects. Our results imply that Chagas control programmes should consider whether bugs are infected in models of triatomine distribution. Electronic supplementary material The online version of this article (10.1186/s13071-019-3489-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Guiehdani Villalobos
- Hospital General "Dr. Manuel Gea González", Secretaría de Salud, Mexico City, Mexico.,Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Angela Nava-Bolaños
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - José A De Fuentes-Vicente
- Instituto de Ciencias Biológicas, Universidad de Ciencias y Artes de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico
| | - Juan Luis Téllez-Rendón
- Instituto de Diagnóstico y Referencia Epidemiológicos, Secretaría de Salud, Mexico City, Mexico
| | - Herón Huerta
- Instituto de Diagnóstico y Referencia Epidemiológicos, Secretaría de Salud, Mexico City, Mexico
| | | | - Maya Rocha-Ortega
- Hospital General "Dr. Manuel Gea González", Secretaría de Salud, Mexico City, Mexico
| | - Ana E Gutiérrez-Cabrera
- CONACyT-Centro de Investigación sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Carlos N Ibarra-Cerdeña
- Departamento de Ecología Humana, Centro de Investigación y Estudios Avanzados del IPN (Cinvestav), Unidad Mérida, 97310, Mérida, Yucatán, Mexico
| | - Alex Córdoba-Aguilar
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Mexico City, Mexico.
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19
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Rendón-Franco E, López-Díaz O, Martínez-Hernández F, Villalobos G, Muñoz-García CI, Aréchiga-Ceballos N, Alfonso-Toledo JA, García Flores MM, Aguilar Setién A. Litomosoides sp. (Filarioidea: Onchocercidae) Infection in Frugivorous Bats ( Artibeus spp.): Pathological Features, Molecular Evidence, and Prevalence. Trop Med Infect Dis 2019; 4:E77. [PMID: 31083297 PMCID: PMC6631640 DOI: 10.3390/tropicalmed4020077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 04/24/2019] [Accepted: 04/29/2019] [Indexed: 11/17/2022] Open
Abstract
Bats can host pathogenic organisms such as viruses and fungi, but little is known about the pathogenicity of their parasites. Hemoparasites are frequently recorded in Neotropical bats, particularly Litomosoides (Filarioidea: Onchocercidae), but their pathogenic effect on bats is scarcely known. In this work, Litomosoides microfilariae were identified in four (8%) out of 51 sampled frugivorous bats belonging to three different species: Artibeus aztecus, Artibeus jamaicensis, and Artibeus lituratus, which are located in Yautepec, Morelos, Mexico. Two infected animals showed weakness, tachypnoea, and ecchymosis on their wings. In these animals, histopathology revealed microfilariae in the blood vessels of the lung, liver, and spleen. Both animals presented exudative pneumonia with congestion and concomitant edema, in addition to moderate arterial hypertrophy. Parasitemia was quantified in blood samples of the infected animals (>3000 parasites/mL). Phylogenetic analysis placed the obtained sequence inside the Litomosoides genus, reaching over 98% identity to the related species. Due to the relevance of bats in ecosystems, any new record of their parasite repertoire offers noteworthy insights into our understanding of the ecology and impact of new parasite species in bats.
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Affiliation(s)
- Emilio Rendón-Franco
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana Unidad Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Del. Coyoacán, Ciudad de México CP. 04960, Mexico.
| | - Osvaldo López-Díaz
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana Unidad Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Del. Coyoacán, Ciudad de México CP. 04960, Mexico.
| | - Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan # 4800, Del. Tlalpan, Ciudad de México CP. 14080, Mexico.
| | - Guiehdani Villalobos
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan # 4800, Del. Tlalpan, Ciudad de México CP. 14080, Mexico.
| | - Claudia Irais Muñoz-García
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana Unidad Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Del. Coyoacán, Ciudad de México CP. 04960, Mexico.
| | - Nidia Aréchiga-Ceballos
- Laboratorio de Rabia, Instituto de Diagnóstico y Referencia Epidemiológicos, Francisco de P. Miranda 177, Colonia Unidad Lomas de Plateros, Ciudad de México CP. 01480, Mexico.
| | - Jorge Alberto Alfonso-Toledo
- Unidad de Investigación Médica en Inmunología, Coordinación de Investigación Médica, Instituto Mexicano del Seguro Social (IMSS), Av. Cuauhtémoc No. 330, Col. Doctores, UMAE Hospital de Pediatría, C.M.N. Siglo XXI, Ciudad de México CP. 06720, Mexico.
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Del. Coyoacán, Ciudad de México CP. 04510, Mexico.
| | - María Martha García Flores
- Unidad de Investigación Médica en Inmunología, Coordinación de Investigación Médica, Instituto Mexicano del Seguro Social (IMSS), Av. Cuauhtémoc No. 330, Col. Doctores, UMAE Hospital de Pediatría, C.M.N. Siglo XXI, Ciudad de México CP. 06720, Mexico.
| | - Alvaro Aguilar Setién
- Unidad de Investigación Médica en Inmunología, Coordinación de Investigación Médica, Instituto Mexicano del Seguro Social (IMSS), Av. Cuauhtémoc No. 330, Col. Doctores, UMAE Hospital de Pediatría, C.M.N. Siglo XXI, Ciudad de México CP. 06720, Mexico.
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Martínez-Hernández F, Vega-Memije ME, Villalobos G, Perez-Rojas D, Asz-Sigall D, Rivas N, Alejandre R, Maravilla P, Valdovinos MR. Myiasis caused by Dermatobia hominis in Mexico: morphological and molecular identification using the cytochrome oxidase I gene. Rev Inst Med Trop Sao Paulo 2019; 61:e45. [PMID: 31531623 PMCID: PMC6746196 DOI: 10.1590/s1678-9946201961045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 08/05/2019] [Indexed: 11/22/2022] Open
Abstract
Myiasis caused by Dermatobia hominis , the human botfly, is frequent in the Americas, however, scarce morphological and molecular information exist regarding this dipteran. We describe three cases in urban areas of Mexico were D. hominis is not endemic. Morphological and genetic identification were performed using the cytochrome oxidase I as a molecular marker. The mitochondrial cytochrome oxidase I gene is useful for inferring the genetic divergence of D. hominis .
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21
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Muñoz-García CI, López-Díaz O, Osorio-Sarabia D, Martínez-Hernández F, Villalobos G, Isaak-Delgado AB, Rendón-Franco E, Carreño-Cervantes A, Contreras-Patiño DR, Berriatua E, Pleite CMC. New insights into the clinico-histopathological and molecular features of Pelecitus (Filarioidea: Onchocercidae) from a raptor bird. Parasitol Res 2018; 117:3319-3325. [PMID: 30006807 DOI: 10.1007/s00436-018-6009-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 07/06/2018] [Indexed: 11/30/2022]
Abstract
Some Onchocercidae nematodes such as Pelecitus are parasites of medical and veterinary importance. The adult stage of Pelecitus has been reported infecting birds, and the microfilaria has been associated to human blindness. However, in some of these cases, the nematode was incompletely identified at the species level due to the scarcity of morphological taxonomic keys and, also, to the lack of molecular diagnostic analysis. Here, we report a new Pelecitus species in a crested caracara (Caracara cheriway) producing a severe tenosynovitis and microfilarial dermatitis. It is also the first record of Pelecitus in an American bird of prey. Clinical and histopathological features are described, contributing towards our understanding of the pathogenesis of Pelecitus and the health and conservation of wild bird populations. Our study also provides new information on the molecular diagnosis of this parasite and highlights the potential role of wild birds as Pelecitus reservoirs, and health risk for humans and wildlife.
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Affiliation(s)
- Claudia I Muñoz-García
- Departamento de Sanidad Animal, Facultad de Veterinaria, Campus Regional Internacional de Excelencia "Campus Mare Nostrum", Universidad de Murcia, 30100, Murcia, Spain. .,Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Calzada del Hueso 1100, Col. Villa Quietud, Del. Coyoacán, 04960, Mexico City, Mexico.
| | - Osvaldo López-Díaz
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Calzada del Hueso 1100, Col. Villa Quietud, Del. Coyoacán, 04960, Mexico City, Mexico
| | - David Osorio-Sarabia
- Escuela Colegio de Ciencias y Humanidades, Plantel Oriente, Universidad Nacional Autónoma de México, Av. Canal de San Juan S/N, Tepalcates, Del. Iztapalapa, 09210, Mexico City, Mexico
| | - Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Calzada de Tlalpan no. 4800, Del. Tlalpan, 14080, Mexico City, Mexico
| | - Guiehdani Villalobos
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Del. Coyoacán, 04510, Mexico City, Mexico
| | - Ana B Isaak-Delgado
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Del. Coyoacán, 04510, Mexico City, Mexico
| | - Emilio Rendón-Franco
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Calzada del Hueso 1100, Col. Villa Quietud, Del. Coyoacán, 04960, Mexico City, Mexico
| | - Angélica Carreño-Cervantes
- Centro para la Conservación e Investigación de la Vida Silvestre, Secretaria de Medio Ambiente y Recursos Naturales, Circuito Emiliano Zapata Norte El Pino, 56507, Los Reyes Acaquilpan, Estado de México, Mexico
| | - Daniel R Contreras-Patiño
- Centro para la Conservación e Investigación de la Vida Silvestre, Secretaria de Medio Ambiente y Recursos Naturales, Circuito Emiliano Zapata Norte El Pino, 56507, Los Reyes Acaquilpan, Estado de México, Mexico
| | - Eduardo Berriatua
- Departamento de Sanidad Animal, Facultad de Veterinaria, Campus Regional Internacional de Excelencia "Campus Mare Nostrum", Universidad de Murcia, 30100, Murcia, Spain
| | - Carlos Martínez-Carrasco Pleite
- Departamento de Sanidad Animal, Facultad de Veterinaria, Campus Regional Internacional de Excelencia "Campus Mare Nostrum", Universidad de Murcia, 30100, Murcia, Spain
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García G, Ramos F, Martínez-Hernández F, Hernández L, Yáñez J, Gaytán P. A new subtype of Entamoeba gingivalis: "E. gingivalis ST2, kamaktli variant". Parasitol Res 2018; 117:1277-1284. [PMID: 29429011 PMCID: PMC5978907 DOI: 10.1007/s00436-018-5798-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 01/31/2018] [Indexed: 11/24/2022]
Abstract
Entamoeba gingivalis is a protozoan that resides in the oral cavity. Using molecular biology techniques, we identified a novel organism that shares the same ecological niche as E. gingivalis. To differentiate this organism from E. gingivalis, we named it “kamaktli variant.” By sequencing the 18S-ITS1-5.8S-ITS2 rRNA region, we demonstrated that kamaktli variant is 89% identical to E. gingivalis. To elucidate the relationship between kamaktli variant and E. gingivalis, we performed a phylogenetic analysis. Both taxa clustered in the same clade with high support, indicating that the amoebas are closely related (98/99/1.00, maximum parsimony/maximum likelihood/MrBayes, respectively). Given this information, we propose that these molecular differences between kamaktli variant and E. gingivalis ST1 are sufficient to distinguish them as independent subtypes, and we name the new subtype “E. gingivalis ST2, kamaktli variant.”
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Affiliation(s)
- Gabriela García
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Av. Universidad 3000, Cd. Universitaria Coyoacán, CP.04510, Ciudad de México, Mexico.
| | - Fernando Ramos
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Av. Universidad 3000, Cd. Universitaria Coyoacán, CP.04510, Ciudad de México, Mexico
| | - Fernando Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General Dr. Manuel Gea González, Calzada de Tlalpan 4800, Tlalpan, CP.14080, Ciudad de México, Mexico
| | - Lilian Hernández
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Av. Universidad 3000, Cd. Universitaria Coyoacán, CP.04510, Ciudad de México, Mexico
| | - Jorge Yáñez
- Unidad de Síntesis y Secuenciación de DNA, Instituto de Biotecnología, UNAM, Av. Universidad 2001, CP.14000, Cuernavaca, Morelos, Mexico
| | - Paul Gaytán
- Unidad de Síntesis y Secuenciación de DNA, Instituto de Biotecnología, UNAM, Av. Universidad 2001, CP.14000, Cuernavaca, Morelos, Mexico
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González-Guzmán S, Pichardo-Ávila S, Mimbrera-Rodríguez E, Crescencio-Trujillo JA, Gasca-Leyva MDL, Martínez-Hernández F, Rivas N, Alejandre-Aguilar R. Seroprevalence of human Trypanosoma cruzi infection in the North of Estado de Mexico. Rev Soc Bras Med Trop 2017; 50:839-842. [DOI: 10.1590/0037-8682-0512-2016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 08/10/2017] [Indexed: 11/22/2022] Open
Affiliation(s)
- Saúl González-Guzmán
- Instituto Mexicano del Seguro Social, Mexico; Hospital Regional de Alta Especialidad de Zumpango, Mexico
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Martínez-Flores WA, Palma-García JM, Caballero-Ortega H, Del Viento-Camacho A, López-Escamilla E, Martínez-Hernández F, Vinuesa P, Correa D, Maravilla P. Genotyping Toxoplasma gondii with the B1 Gene in Naturally Infected Sheep from an Endemic Region in the Pacific Coast of Mexico. Vector Borne Zoonotic Dis 2017; 17:495-502. [PMID: 28530509 DOI: 10.1089/vbz.2016.2085] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Toxoplasma gondii is a protozoan parasite with a broad ecological valence, which has been detected in a wide range of hosts and landscapes. Although the genus is considered monospecific, in recent years it has been demonstrated to exhibit more genetic variability than previously known. In Mexico, there are few genotyping studies, which suggest that classical, autochthonous, and atypical strains are circulating. The goal of this study was to describe T. gondii genetic diversity in naturally infected sheep from Colima, Mexico. This is a good site to study ecological aspects of this parasite since it is located between the Nearctic and Neotropical ecozones and it includes domestic and wild risks for transmission. We analyzed 305 tissue samples of semicaptive sheep from six coastal and central zones of Colima and border zones of Michoacán. We used an 803 bp amplicon of the B1 gene to genotype T. gondii and seroprevalence was determined by ELISA. Indexes for genetic diversity and genetic differentiation were calculated and compared with reference strains from North America (NA) and South America (SA). Twenty-three tissue samples were positive for the B1 gene by PCR, which were sequenced. Crude prevalence was 24.4%. The genetic analysis showed 16 variable sites along the 803 bp region that grouped all sequences into 13 haplotypes in the phylogenetic tree. Bayesian and haplotype network analysis showed nine new B1-types, of which three were frequent and six had unique alleles. Comparisons among sequence sets revealed that the Mexican population had lower differentiation than SA and an intermediate genetic variability between South America and North America. The B1 gene analysis showed new T. gondii haplotypes in naturally infected sheep; therefore, this marker could be initially used in molecular screening studies to identify potentially virulent genotypes of this parasite using natural host samples directly.
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Affiliation(s)
| | - José Manuel Palma-García
- 2 Centro Universitario de Investigación y Desarrollo Agropecuario, Facultad de Medicina Veterinaria y Zootecnia, Universidad de Colima , Colima, México
| | | | - Alejandra Del Viento-Camacho
- 2 Centro Universitario de Investigación y Desarrollo Agropecuario, Facultad de Medicina Veterinaria y Zootecnia, Universidad de Colima , Colima, México
| | - Eduardo López-Escamilla
- 1 Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González," Ciudad de México, México
| | - Fernando Martínez-Hernández
- 1 Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González," Ciudad de México, México
| | - Pablo Vinuesa
- 4 Centro de Ciencias Genómicas, Programa de Ingeniería Genómica, Universidad Nacional Autónoma de México , Cuernavaca, México
| | - Dolores Correa
- 3 Laboratorio de Inmunología Experimental, Instituto Nacional de Pediatría , Ciudad de México, México
| | - Pablo Maravilla
- 1 Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González," Ciudad de México, México
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25
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Tamay-Segovia P, Blum-Domínguez SC, Núñez-Oreza LA, Martínez-Hernández F, Gómez-Solano MI, Maldonado-Velázquez MG, Retana-Guiascón OG. Presence of Virginia opossum (Didelphis virginiana) and Pic (Triatoma dimidiata) infected with Trypanosoma cruzi in urban areas: preliminary evaluation in the city of Campeche, Mexico. AUSTRAL J VET SCI 2017. [DOI: 10.4067/s0719-81322017000100035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Blum-Domínguez SDC, Martínez-Vázquez A, Núñez-Oreza LA, Martínez-Hernández F, Villalobos G, Tamay-Segovia P. [Diffuse cutaneous leishmaniasis (DCL) and visceral leishmaniasis (VL) concurrent with cancer: Presentation of a case]. GAC MED MEX 2017; 153:121-124. [PMID: 28128815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
Male of 52 year old with chronic alcoholism and ulcerated lesion on the face and disseminated nodular skin lesions, underwent to biopsy of ulcer edges where was observed a concomitant epidermoid malignancy with Leishmania (L.). Besides others, biopsies of nodule in the periumbilical region, lymph node and bone marrow were assayed, and all biopsies had abundant amastigotes. The amplified Polymerase Chain Reaction (PCR) products from nodule were sequenced and the alignment analysis demonstrated homology with L. mexicana confirming the infection by this parasite. This is considered the first case of visceral and diffuse cutaneous leishmaniasis concurrent with epidermoid cancer in the state of Campeche.
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Affiliation(s)
- Selene Del C Blum-Domínguez
- Laboratorio de Enfermedades Tropicales, Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Campeche, Camp., México
| | - Alejandro Martínez-Vázquez
- Servicio de Anatomía Patológica, Hospital General de Especialidades Dr. Javier Buenfil Osorio, Campeche, Camp., México
| | - Luis A Núñez-Oreza
- Laboratorio de Microbiología, Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Campeche, Camp., México
| | - Fernando Martínez-Hernández
- Departamento de Ecología y Agentes Patógenos, Hospital General Dr. Manuel Gea González, Campeche, Camp., México
| | - Guiehdani Villalobos
- Departamento de Ecología y Agentes Patógenos, Hospital General Dr. Manuel Gea González, Campeche, Camp., México
| | - Paulino Tamay-Segovia
- Laboratorio de Enfermedades Transmitidas por Vectores y Zoonosis, Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Campeche, Camp., México
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Martínez-Hernández F, López-Díaz O, Bello-Bedoy R, Villalobos G, Muñoz-García CI, Alejandre-Aguilar R, Córdoba-Aguilar A, Gutiérrez-Cabrera AE, Suzán G, Villanueva-García C, Gama-Campillo LM, Díaz-Negrete MT, Rendón-Franco E. Possible Differences in the Effects of Trypanosoma cruzi on Blood Cells and Serum Protein of Two Wildlife Reservoirs. Vector Borne Zoonotic Dis 2016; 16:709-716. [PMID: 27656956 DOI: 10.1089/vbz.2016.1986] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A key step in the dynamics of vector-borne diseases is the role of seasonality. Trypanosoma cruzi is a protozoan that causes Chagas disease. Some wild mammals are considered natural hosts, yet not all mammals show the same response to infection. We explored the effect of T. cruzi on blood parameters in two mammal carnivores, coati (Nasua narica) and raccoon (Procyon lotor), that were naturally infected in summer and winter seasons. The study was carried out in the Zoological Park "Parque Museo de la Venta," in Southeastern Mexico. Blood samples were collected in summer and winter from 2010 to 2013. Parasite infection was assessed by PCR from whole blood, and a complete hemogram was determined by traditional manual methods. We found that both species had the same T. cruzi I lineage. For coatis, mean corpuscular volume, mean corpuscular hemoglobin, and monocytes were dependent of season, while eosinophils and plasma proteins were significantly different, but with no season effect. For raccoon, erythrocytes, mean corpuscular volume, mean corpuscular hemoglobin, and monocytes were dependent of season. These results and a previous study that indicated interspecific differences in parasitemia in both species suggest that raccoon is a better reservoir than coati. Such a different interspecific response implies that animals do not contribute equally to maintain T. cruzi parasites in the ecosystem. Such inequality differs according to season.
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Affiliation(s)
- Fernando Martínez-Hernández
- 1 Departamento de Ecología de Agentes Patógenos, Hospital General Dr. Manuel Gea González , México City, México
| | - Osvaldo López-Díaz
- 2 Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana Unidad Xochimilco , México City, México
| | - Rafael Bello-Bedoy
- 3 Facultad de Ciencias, Universidad Autónoma de Baja California , Ensenada, México
| | - Guiehdani Villalobos
- 4 Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad Universitaria , México City, México
| | - Claudia I Muñoz-García
- 2 Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana Unidad Xochimilco , México City, México
| | - Ricardo Alejandre-Aguilar
- 5 Laboratorio de Entomología, Departamento de Parasitología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional , México City, México
| | - Alex Córdoba-Aguilar
- 4 Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad Universitaria , México City, México
| | - Ana E Gutiérrez-Cabrera
- 6 CONACYT-Centro de Investigación Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública , Cuernavaca, México
| | - Gerardo Suzán
- 7 Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad Universitaria , México City, México
| | - Claudia Villanueva-García
- 8 Laboratorio de Ecología del Paisaje y Cambio Global, División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco , Villahermosa, México
| | - Lilia M Gama-Campillo
- 8 Laboratorio de Ecología del Paisaje y Cambio Global, División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco , Villahermosa, México
| | - Mariela T Díaz-Negrete
- 9 Dirección General de Zoológicos y Vida Silvestre, Zoológico de Chapultepec , México City, México
| | - Emilio Rendón-Franco
- 2 Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana Unidad Xochimilco , México City, México
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Ibarra-Arce A, Ortiz de Zárate-Alarcón G, Flores-Peña LG, Martínez-Hernández F, Romero-Valdovinos M, Olivo-Díaz A. Mutations in the FGFR2 gene in Mexican patients with Apert syndrome. Genet Mol Res 2015; 14:2341-6. [PMID: 25867380 DOI: 10.4238/2015.march.27.19] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Apert syndrome (AS) is a frequent acrocephalosyndactyly, with autosomal dominant inheritance. AS has been associated with mutations in fibroblast growth factor receptor 2 (FGFR2), and approximately 99% of cases show 2 of the frequent mutations located in exon IIIa (Ser252Trp or Pro253Arg). The purpose of the present study was to describe the mutations in exon IIIa of FGFR2 in Mexican AS patients and the relationships with clinical features. Exon IIIa of FGFR2 from 6 AS patients was amplified by polymerase chain reaction. Mutations in exon IIIa of the FGFR2 gene were identified by digestion with the restriction endonuclease Bstx1 and polyacrylamide gel electrophoresis. PCR fragments were cloned into the PCR 2.1 vector, and both DNA strands were sequenced using the T7 promoter and M13 universal cloning region oligonucleotides. Sequence alignment was performed using the MEGA software version 5. The patients' major clinical features included craniosynostosis, hypertelorism, proptosis, otitis media, midfacial hypoplasia, rhizomelic shortening, and hyperhidrosis. Mutation S252W was present in 4 patients, while the other 2 patients had P253R. In conclusion, either S252W or P253R mutations were present independently in AS patients; however, the 2 mutations were not found together. None of the clinical features were associated with any of the mutations, suggesting that other mutations may be involved in the development of this syndrome.
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Affiliation(s)
- A Ibarra-Arce
- División de Genética, Hospital General Doctor Manuel Gea González, D.F., México
| | | | - L G Flores-Peña
- División de Genética, Hospital General Doctor Manuel Gea González, D.F., México
| | - F Martínez-Hernández
- Departamento de Ecología de Agentes Patógenos, Hospital General Doctor Manuel Gea González, D.F., México
| | - M Romero-Valdovinos
- Departamento de Biología Molecular e Histocompatibilidad, Hospital General Doctor Manuel Gea González, D.F., México
| | - A Olivo-Díaz
- Departamento de Biología Molecular e Histocompatibilidad, Hospital General Doctor Manuel Gea González, D.F., México
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29
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Suástegui-Urquijo Z, Jaramillo-Arango CJ, Martínez-Hernández F, Ureta E, Trigo-Tavera F, Suárez-Güemes F, Xicohtencatl-Cortes J, Hernández-Castro R. Identification and phylogenetic relationship of Mannheimia varigena using the 16S rRNA subunit and the rpoB gene. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-1017-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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30
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Martínez-Hernández F, Rendon-Franco E, Gama-Campillo LM, Villanueva-García C, Romero-Valdovinos M, Maravilla P, Alejandre-Aguilar R, Rivas N, Córdoba-Aguilar A, Muñoz-García CI, Villalobos G. Follow up of natural infection with Trypanosoma cruzi in two mammals species, Nasua narica and Procyon lotor (Carnivora: Procyonidae): evidence of infection control? Parasit Vectors 2014; 7:405. [PMID: 25174672 PMCID: PMC4161768 DOI: 10.1186/1756-3305-7-405] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 08/23/2014] [Indexed: 05/28/2023] Open
Abstract
Background A large variety of mammals act as natural reservoirs of Trypanosoma cruzi (the causal agent of Chagas disease) across the American continent. Related issues are infection and parasite burden in these reservoirs, and whether they are able to control T. cruzi infections. These parameters can indicate the real role of mammals as T. cruzi reservoirs and transmitters. Here, two species of mammals, white-nosed coati (Nasua narica) and raccoon (Procyon lotor), were examined for to determine: a) T. cruzi presence, and; b) their ability to control T. cruzi infection. Methods Multiple capture-recaptures of both species were carried out in semi-wild conditions in Villahermosa, Tabasco, Mexico, for 5 years. Two samplings per year (summer and winter) took place. Prevalence and pattern of T. cruzi infection were determined by PCR from both mammals’ blood samples. Results Raccoon samples had a higher relative infection values (26.6%) compared to those of white-nosed coati (9.05%), being this difference significant in summer 2012 (P < 0.00001), summer (P = 0.03) and winter 2013 (P = 0.02). Capture and recapture data indicated three infection dynamics: 1) negative–positive-negative infection; 2) positive–negative-positive infection; and 3) positive at all sampling times. Conclusions These results indicate that both coati and raccoons may be able to control T. cruzi infection. Thus, the role as efficient reservoirs could be questioned (at least for those times when mammals are able to tolerate the infection). However, while infected, they may also be able to approach human dwellings and play a role important in linking sylvatic and domestic cycles.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Claudia Irais Muñoz-García
- Departamento de Producción Agrícola y Animal, UAM-Unidad Xochimilco, Calzada del Hueso 1100, Col, Villa Quietud, Delegación Coyoacán, CP 04960, México.
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Martinez-Ocaña J, Olivo-Diaz A, Salazar-Dominguez T, Reyes-Gordillo J, Tapia-Aquino C, Martínez-Hernández F, Manjarrez ME, Antonio-Martinez M, Contreras-Molina A, Figueroa-Moreno R, Valdez-Vazquez R, Kawa-Karasik S, Rodríguez-Zulueta P, Flisser A, Maravilla P, Romero-Valdovinos M. Plasma cytokine levels and cytokine gene polymorphisms in Mexican patients during the influenza pandemic A(H1N1)pdm09. J Clin Virol 2013; 58:108-13. [PMID: 23809475 DOI: 10.1016/j.jcv.2013.05.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 05/06/2013] [Accepted: 05/17/2013] [Indexed: 01/09/2023]
Abstract
BACKGROUND In Mexico, the initial severe cases of the 2009 influenza pandemic virus A (H1N1) [A(H1N1)pdm09] were detected in early March. The immune mechanisms associated with the severe pneumonia caused by infection with this new virus have not been completely elucidated. Polymorphisms in interleukin genes have previously been associated with susceptibility to infectious diseases due to their influence on cytokine production. OBJECTIVES The present case-control study was performed to compare several immunologic and genetic parameters of patients and controls during the initial phase of the pandemic. STUDY DESIGN Sixty-five patients who were hospitalized due to infection with the influenza A(H1N1)pdm09 virus and 46 healthy controls were studied. A hemagglutination inhibition assay (HIA) was performed to measure anti-influenza antibody titers in these subjects. Protein levels of the cytokines interleukin (IL)-4, IL-6, IL-8, IL-10, tumor necrosis factor-α (TNFα), interferon gamma (IFNγ), transforming growth factor beta (TGFβ)1 and TGFβ2 were quantified in plasma. Single nucleotide polymorphisms in IL6, IL10 and TNFα were also assessed. RESULTS Influenza patients had lower antibody titers and produced significantly higher levels of IL-6, IL-10 and TNFα than healthy controls. The frequencies of the TNFα -308G, IL-10 -592C and IL-10 -1082A alleles and the IL10 -1082(A/A) genotype were associated with susceptibility to severe disease, while the haplotypes TNFα AG and IL-10 GTA and GCA were associated with protection from severe disease [P=0.016, OR (CI)=0.11 (0.01-0.96); P=0.0187, OR (CI)=0.34 (0.13-0.85); P=0.013, OR (CI)=0.39 (0.18-0.83)]. CONCLUSIONS This study demonstrates that the influenza A(H1N1)pdm09 patients and healthy controls have different profiles of immune parameters and that there is an association between IL-10 and TNFα polymorphisms and the outcome of this disease.
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Villalobos G, Alejandre-Aguilar R, Martínez-Hernández F. Reduvius personatus (Hemiptera: Reduviidae) in a community of Oaxaca state, Mexico. J Vector Ecol 2013; 38:188-189. [PMID: 23701625 DOI: 10.1111/j.1948-7134.2013.12026.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- Guiehdani Villalobos
- Laboratorio de Entomología, Depto. de Parasitología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, D. F., México
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Martínez I, Nogueda B, Martínez-Hernández F, Espinoza B. Microsatellite and mini-exon analysis of Mexican human DTU I Trypanosoma cruzi strains and their susceptibility to nifurtimox and benznidazole. Vector Borne Zoonotic Dis 2013; 13:181-7. [PMID: 23421890 DOI: 10.1089/vbz.2012.1072] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Chagas disease is caused by the protozoan parasite Trypanosoma cruzi, and it affects as many as 10 million people in North and South America, where it represents a major public health problem. T. cruzi is a parasite with high genetic diversity, and it has been grouped into 6 discrete typing units (DTUs), designated as T. cruzi I (TcI) to T. cruzi VI (TcVI). Mexican isolates from humans and from vector insects have been primarily found to be TcI, and these isolates are likely to be the strains that cause the clinical manifestations observed in Mexico. However, genetic characterization and drug susceptibility assays are limited in Mexican TcI strains. In this work, 24 Mexican T. cruzi strains, obtained primarily from humans, were studied with 7 locus microsatellites and mini-exon gene by PCR. Also, drug susceptibility was evaluated by growth and mobility assays. All of the human strains belonged to TcI, and they could be further grouped through microsatellite analysis into 2 subgroups (microsatellite genotypes 1 and 2), which were not related to the host clinical status or biological origin of the strain. Two strains, both from wild mammals, belonged to the TcII-TcVI groups; these strains and the CL Brener strain constituted microsatellite genotype 3. The number of alleles in each locus was lower than reported for South American strains, and a departure from the Hardy-Weinberg equilibrium was observed. The susceptibility of these strains to nifurtimox and benznidazole was heterogeneous. T. cruzi strains characterized as microsatellite genotypes 2 and 3 were significantly more susceptible to benznidazole than strains of microsatellite genotype 1. Only 1 Mexican strain resistant to both drugs was found in this study.
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Affiliation(s)
- Ignacio Martínez
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México
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Espinoza B, Martínez-Ibarra JA, Villalobos G, De La Torre P, Laclette JP, Martínez-Hernández F. Genetic variation of North American Triatomines (Insecta: Hemiptera: Reduviidae): initial divergence between species and populations of Chagas disease vector. Am J Trop Med Hyg 2012; 88:275-84. [PMID: 23249692 DOI: 10.4269/ajtmh.2012.12-0105] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The triatomines vectors of Trypanosoma cruzi are principal factors in acquiring Chagas disease. For this reason, increased knowledge of domestic transmission of T. cruzi and control of its insect vectors is necessary. To contribute to genetic knowledge of North America Triatominae species, we studied genetic variations and conducted phylogenetic analysis of different triatomines species of epidemiologic importance. Our analysis showed high genetic variations between different geographic populations of Triatoma mexicana, Meccus longipennis, M. mazzottii, M. picturatus, and T. dimidiata species, suggested initial divergence, hybridation, or classifications problems. In contrast, T. gerstaeckeri, T. bolivari, and M. pallidipennis populations showed few genetics variations. Analysis using cytochrome B and internal transcribed spacer 2 gene sequences indicated that T. bolivari is closely related to the Rubrofasciata complex and not to T. dimidiata. Triatoma brailovskyi and T. gerstaeckeri showed a close relationship with Dimidiata and Phyllosoma complexes.
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Affiliation(s)
- Bertha Espinoza
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Distrito Federal, México.
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Villalobos G, Martínez-Ibarra JA, Martínez-Hernández F, López-Alcaide S, Alejandre-Aguilar R. The morphological variation of the eggs and genital plates of two morphotypes of Triatoma protracta Uhler, 1894. J Vector Ecol 2012; 37:179-186. [PMID: 22548552 DOI: 10.1111/j.1948-7134.2012.00215.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The control of triatomine insects is necessary because these insects are the principal vectors of Trypanosoma cruzi, the agent of Chagas disease. Nevertheless, some of these vectors, such as Triatoma protracta, have not been studied adequately and their importance and taxonomic status has not yet been defined in detail and must be reevaluated in view of the continuing taxonomic uncertainties associated with the species. To help clarify the taxonomic status of T. protracta, the eggs and genital plates of two morphotypes were analyzed. Qualitative and quantitative morphological differences were observed in two morphotypes, designated T. p. protracta and T. p. nahuatlae according to Ryckman (1962). The morphotype T. p. protracta exhibited large and wide eggs with pores forming large padded polygonal structures, whereas the eggs of the morphotype T. p. nahuatlae were small and smooth. The size of the 9(th) genital urosternite was longer and wider in females in contrast to males in both morphotypes. However, these size differences were relatively greater in T. p. protracta. The high morphological variation found between the morphotypes of T. protracta suggests that they should be separated. Accordingly, it is probable that this group should be re-classified.
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Affiliation(s)
- Guiehdani Villalobos
- Laboratorio de Entomología, Depto. de Parasitología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Casco de Santo Tomás, PC 11340, D.F., México
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Villalobos G, Martínez-Hernández F, de la Torre P, Laclette JP, Espinoza B. Entomological indices, feeding sources, and molecular identification of Triatoma phyllosoma (Hemiptera: Reduviidae) one of the main vectors of Chagas disease in the Istmo de Tehuantepec, Oaxaca, Mexico. Am J Trop Med Hyg 2011; 85:490-7. [PMID: 21896810 DOI: 10.4269/ajtmh.2011.10-0508] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The purpose of this study was to conduct an entomological analysis, determination of feeding sources, and molecular identification of triatomines in five communities of the Istmo de Tehuantepec, Oaxaca. The only found species in two of five searched communities (San Mateo del Mar and Tehuantepec City) was Triatoma phyllosoma. Colonization indices were high in both communities. In San Mateo del Mar, the insects were found indoors and in Tehuantepec City in peridomestic areas. The Trypanosoma cruzi infection indices were 2.1% in San Mateo del Mar and 39.4% in Tehuantepec City. This difference could be related to the high numbers of triatomine feeding on hens in the former community. In contrast, in Tehuantepec, dogs were the principal triatomine feeding sources. All nymphs and adults that were genetically analyzed belonged to the species T. phyllosoma. Low levels of genetic variation were found between vectors from both communities.
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Affiliation(s)
- Guiehdani Villalobos
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Distrito Federal, México
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Medina-Chávez JH, Torres-Arreola LDP, Cortés-González RM, Durán-Gómez V, Martínez-Hernández F, Esquivel-Romero G. [Clinical practice guideline: a complete geriatric evaluation]. Rev Med Inst Mex Seguro Soc 2011; 49:669-684. [PMID: 22176832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The care of elderly patients requires an evaluation that deserves a host of special considerations, such as biological aspects of aging, those related to activities of daily living and functionality, neuro-psychological conceptions, family dynamics and economic conditions. The growth of the aging population in our country is accompanied by an increase in chronic diseases and more individuals have greater vulnerability, requiring a more consumption of resources because of the high demand for services. This requires the incorporation of specialized care in the institutional system, which has caused serious consequences in the current health system, benefiting specialization and technology, but with a loss of an integrated and horizontal view of the patient. Therefore it is necessary to develop a practical tool that allows the family physician to identify and differentiate the geriatric population that requires specialized care from who does not, identifying problems that may improve and allow the design of strategies to improve health status and maintain functional autonomy of the elderly. Comprehensive Geriatric Assessment (CGA) is a fundamental tool for clinical practice of any medical care to the elderly.
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Affiliation(s)
- Juan Humberto Medina-Chávez
- División de Excelencia Clínica, Coordinación de Unidades Médicas de Alta Especialidad, Distrito Federal, México.
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Ramírez-Miranda ME, Jiménez-González DE, Rodríguez-Campa ME, González-Angulo A, Hernández-Castellanos R, Sara Arroyo-Escalante A, Romero-Valdovinos M, Martínez-Hernández F, Flisser A, Maravilla P. [Irritable bowel syndrome: frequency and phylogenetic relationship of Blastocystis sp. from Mexican patients]. Rev Gastroenterol Mex 2011; 76:309-315. [PMID: 22188955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Recent studies reported increased presence of Blastocystis in patients with Irritable Bowel Syndrome (IBS) and an etiologic role has been proposed. The pathogenic role of Blastocystis is controversial, because it is frequently found not only in individuals with enteric symptoms but also in healthy and asymptomatic subjects. Furthermore, there are few studies of blastocistosis in Mexico. OBJECTIVE To assess the frequency of Blastocystis sp. in IBS patients using molecular techniques and to describe its phylogenetic relationship with sequences of other countries. METHODS IBS patients according to Rome III criteria were enrolled. In all patients evaluations included: colonoscopies, coproparasitoscopic studies, coproculture, fecal virus screening. PCR and sequencing for Blastocystis sp. were also performed. RESULTS We recruited 11 men and 51 women with a mean age of 45.6 (SD ± 15.7) years. Eighty-six percent of the IBS patients presented a normal colonoscopy, 8% showed polyps and 6% diverticular disease. Blastocystis sp. was identified in 25% patients (all of them with normal colonoscopy), while two patients had Endolimax nana and Entamoeba histolytica/E. dispar, respectively. Phylogenetic analysis showed that major sequences of Mexican carriers clustered together with sequences of parasites from Japan and Denmark; furthermore, two sequences from IBS patients were grouped in a single cluster. CONCLUSIONS Blastocystis sp. was identified in 25% of the IBS patients. Our data support the hypothesis of clonal lineages in distinct geographical areas in the world.
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Martínez-Ibarra JA, Martínez-Hernández F, Villalobos G, Vences-Blanco MO, Salazar-Schettino PM. Update on the distribution of Triatoma bolivari and Triatoma brailovskyi (Hemiptera: Reduviidae: Triatominae) in western Mexico. J Vector Ecol 2010; 35:432-434. [PMID: 21175952 DOI: 10.1111/j.1948-7134.2010.00103.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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