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Fariña FA, Krivokapich SJ, Pasqualetti MI, Gatti G, Aronowicz T, Betti A, Laurito FJ, Lopez L, Bessi C, Montalvo F, Ribicich MM. New records of Trichinella patagoniensis from Argentina. Vet Parasitol 2024:110198. [PMID: 38806306 DOI: 10.1016/j.vetpar.2024.110198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/18/2024] [Accepted: 05/08/2024] [Indexed: 05/30/2024]
Abstract
Trichinella spiralis was long considered the sole Trichinella species in Argentina. However, since 2004, various Trichinella species, including the encapsulated Trichinella patagoniensis and Trichinella britovi, as well as the unencapsulated Trichinella pseudospiralis, have been detected in the country. The present study aimed to identify Trichinella ML at the species level from cougars naturally infected from Argentina. To this end, muscle tissue samples from one cougar each from Córdoba, Neuquén, and Santa Cruz Provinces were individually analysed using the artificial digestion technique. DNA extraction and molecular identification of Trichinella species were conducted on individual muscle larvae by PCR amplification of the ESV region and subsequent PCR amplification and sequencing of the COI gene. Morphological analysis revealed muscle larvae with characteristics consistent with Trichinella genus. PCR revealed a single band of approximately 127 bp for each individual muscle larva. PCR amplification of the COI gene from each isolate generated a 309 bp band. Sequencing of the mitochondrial COI gene confirmed the identity of the parasite as T. patagoniensis. The present study documents new occurrences of T. patagoniensis in Puma concolor from Argentina, including the first detection of T. patagoniensis in Puma concolor from Córdoba and Neuquén Province. These findings expand the limited knowledge of T. patagoniensis distribution in Argentina.
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Affiliation(s)
- F A Fariña
- Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias, Buenos Aires, Argentina; Universidad de Buenos Aires, CONICET, Instituto de Investigaciones en Producción Animal (INPA), Buenos Aires, Argentina.
| | | | - M I Pasqualetti
- Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias, Buenos Aires, Argentina; Universidad de Buenos Aires, CONICET, Instituto de Investigaciones en Producción Animal (INPA), Buenos Aires, Argentina
| | - G Gatti
- ANLIS, Dr. Carlos G. Malbrán, Buenos Aires, Argentina
| | - T Aronowicz
- Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias, Buenos Aires, Argentina; SENASA, Argentina
| | - A Betti
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Salud Pública Veterinaria, Buenos Aires, Argentina
| | | | - L Lopez
- Dirección de Jurisdicción de Epidemiología, Ministerio de Salud de Córdoba, Argentina
| | - C Bessi
- Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias, Buenos Aires, Argentina; Universidad de Buenos Aires, CONICET, Instituto de Investigaciones en Producción Animal (INPA), Buenos Aires, Argentina
| | - F Montalvo
- Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias, Buenos Aires, Argentina; Universidad de Buenos Aires, CONICET, Instituto de Investigaciones en Producción Animal (INPA), Buenos Aires, Argentina
| | - M M Ribicich
- Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias, Buenos Aires, Argentina; Universidad de Buenos Aires, CONICET, Instituto de Investigaciones en Producción Animal (INPA), Buenos Aires, Argentina
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Hamann MI, Fernández MV, González CE. Larval Digenean Parasitizing Amphibian Hosts from the Argentinian Chaco Region. Acta Parasitol 2023; 68:194-207. [PMID: 36542296 DOI: 10.1007/s11686-022-00650-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 11/29/2022] [Indexed: 12/24/2022]
Abstract
PURPOSE The diversity of larval digenetic trematodes can provide information on one or more intermediate hosts prior to maturation into the definitive host; on host activity and distribution; and in some cases, on environmental perturbations. In this context, the goal of the present study was to analyse the trematode larvae found in adult amphibians collected from the Argentinian Chaco Region. Few studies have been reported on the systematics of larval digeneans in amphibians. METHODS A total of 167 specimens of frogs (Leptodactylus macrosternum, Leptodactylus latinasus, Lepidobatrachus laevis, Lepidobatrachus llanensis and Lysapsus limellum) and toads (Rhinella bergi) were examined for larval digeneans. Frogs and toads were collected in two Argentinian ecoregions (Dry Chaco and Humid Chaco); between June 2002 and December 2019. Morphology of each taxon was studied in detail using light microscopy and scanning electron microscopy (SEM). RESULTS Fourteen different taxa of the families Diplostomidae (Alariinae gen sp., Didelphodiplostomum sp., Pharingostomoides sp. and Tylodelphys sp.), Proterodiplostomidae (Heterodiplostomum lanceolatum), and Strigeidae (Strigea spp.) were found infecting the body cavity, mesentery, muscle, fluid in the spinal cord canal, and cranial cavity of amphibians. All species are described and illustrated, and their life cycles are briefly discussed. CONCLUSION These infections provide new information on the morphology, morphometry, and composition of the diversity of mesocercariae and metacercariae in amphibians, thus contributing to the knowledge of potential intermediate hosts. In addition, our results serve as an indicator of parasite and host biodiversity in different ecoregions of the Gran Chaco.
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Affiliation(s)
- M I Hamann
- Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Nordeste (UNNE), Ruta 5, Km 2.5, AMD, W 3400, Corrientes, Argentina.
| | - M V Fernández
- Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Nordeste (UNNE), Ruta 5, Km 2.5, AMD, W 3400, Corrientes, Argentina
| | - C E González
- Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Nordeste (UNNE), Ruta 5, Km 2.5, AMD, W 3400, Corrientes, Argentina
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Survey on helminths of bats in the Yucatan Peninsula: infection levels, molecular information and host-parasite networks. Parasitology 2023; 150:172-183. [PMID: 36444644 PMCID: PMC10090612 DOI: 10.1017/s0031182022001627] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Helminth species of Neotropical bats are poorly known. In Mexico, few studies have been conducted on helminths of bats, especially in regions such as the Yucatan Peninsula where Chiroptera is the mammalian order with the greatest number of species. In this study, we characterized morphologically and molecularly the helminth species of bats and explored their infection levels and parasite–host interactions in the Yucatan Peninsula, Mexico. One hundred and sixty-three bats (representing 21 species) were captured between 2017 and 2022 in 15 sites throughout the Yucatan Peninsula. Conventional morphological techniques and molecular tools were used with the 28S gene to identify the collected helminths. Host–parasite network analyses were carried out to explore interactions by focusing on the level of host species. Helminths were found in 44 (26.9%) bats of 12 species. Twenty helminth taxa were recorded (7 trematodes, 3 cestodes and 10 nematodes), including 4 new host records for the Americas. Prevalence and mean intensity of infection values ranged from 7.1 to 100% and from 1 to 56, respectively. Molecular analyses confirmed the identity of some helminths at species and genus levels; however, some sequences did not correspond to any of the species available on GenBank. The parasite–host network suggests that most of the helminths recorded in bats were host-specific. The highest helminth richness was found in insectivorous bats. This study increases our knowledge of helminths parasitizing Neotropical bats, adding new records and nucleotide sequences.
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Grandón-Ojeda A, Moreno L, Garcés-Tapia C, Figueroa-Sandoval F, Beltrán-Venegas J, Serrano-Reyes J, Bustamante-Garrido B, Lobos-Chávez F, Espinoza-Rojas H, Silva-de la Fuente MC, Henríquez A, Landaeta-Aqueveque C. Patterns of Gastrointestinal Helminth Infections in Rattus rattus, Rattus norvegicus, and Mus musculus in Chile. Front Vet Sci 2022; 9:929208. [PMID: 35847649 PMCID: PMC9277659 DOI: 10.3389/fvets.2022.929208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 05/30/2022] [Indexed: 11/13/2022] Open
Abstract
Few studies have assessed the patterns of parasite populations of rodents over a longitudinal gradient in Chile. In this work, the gastrointestinal helminthic fauna of invasive rodents in Chile was examined to assess the association between their presence/absence and abundance with latitude, host sex, and host body condition, and to assess the coexistence and correlation of the abundance between parasite species. Rodents were obtained from 20 localities between 33 and 43°S. Helminths were extracted from the gastrointestinal tract and identified morphologically. Overall, 13 helminth taxa were obtained. The most frequently identified parasite species was Heterakis spumosa, and the most abundant was Syphacia muris, while Physaloptera sp. was the most widely distributed. No locality presented with a coexistence that was different from that expected by chance, while the abundance of five helminthic species correlated with the abundance of another in at least one locality, most likely due to co-infection rather than interaction. Host sex was associated with parasite presence or abundance, and female sex-biased parasitism was notably observed in all cases. Body condition and latitude presented either a positive or negative association with the presence or abundance of parasites depending on the species. It is notable that the likely native Physaloptera sp. is widely distributed among invasive rodents. Further, gravid females were found, suggesting spillback of this species to the native fauna. The low frequency and abundance of highly zoonotic hymenolepid species suggest that rodents are of low concern regarding gastrointestinal zoonotic helminths.
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Affiliation(s)
| | - Lucila Moreno
- Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Carolina Garcés-Tapia
- Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Fernanda Figueroa-Sandoval
- Departamento de Patología y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad de Concepción, Chillán, Chile
| | - Jazmín Beltrán-Venegas
- Departamento de Patología y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad de Concepción, Chillán, Chile
| | - Josselyn Serrano-Reyes
- Departamento de Patología y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad de Concepción, Chillán, Chile
| | - Bárbara Bustamante-Garrido
- Departamento de Patología y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad de Concepción, Chillán, Chile
| | - Felipe Lobos-Chávez
- Departamento de Patología y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad de Concepción, Chillán, Chile
| | - Hellen Espinoza-Rojas
- Departamento de Patología y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad de Concepción, Chillán, Chile
| | | | - AnaLía Henríquez
- Facultad de Medicina Veterinaria, Universidad San Sebastián, Concepción, Chile
| | - Carlos Landaeta-Aqueveque
- Departamento de Patología y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad de Concepción, Chillán, Chile
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