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Criscione CD. ACCEPTANCE OF THE 2023 HENRY BALDWIN WARD MEDAL: PEDIGREE OF A PARASITOLOGIST PROGENY. J Parasitol 2023; 109:655-662. [PMID: 38156757 DOI: 10.1645/23-72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024] Open
Affiliation(s)
- Charles D Criscione
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, Texas 77843
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2
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Salloum PM, Jorge F, Dheilly NM, Poulin R. Adoption of alternative life cycles in a parasitic trematode is linked to microbiome differences. Biol Lett 2023; 19:20230091. [PMID: 37282491 PMCID: PMC10244958 DOI: 10.1098/rsbl.2023.0091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 05/23/2023] [Indexed: 06/08/2023] Open
Abstract
For parasites with complex multi-host life cycles, the facultative truncation of the cycle represents an adaptation to challenging conditions for transmission. However, why certain individuals are capable of abbreviating their life cycle while other conspecifics are not remains poorly understood. Here, we test whether conspecific trematodes that either follow the normal three-host life cycle or skip their final host by reproducing precociously (via progenesis) in an intermediate host differ in the composition of their microbiomes. Characterization of bacterial communities based on sequencing of the V4 hypervariable region of the 16S SSU rRNA gene revealed that the same bacterial taxa occur in both normal and progenetic individuals, independent of host identity and temporal variation. However, all bacterial phyla recorded in our study, and two-thirds of bacterial families, differed in abundance between the two morphs, with some achieving higher abundance in the normal morph and others in the progenetic morph. Although the evidence is purely correlative, our results reveal a weak association between microbiome differences and intraspecific plasticity in life cycle pathways. Advances in functional genomics and experimental microbiome manipulation will allow future tests of the significance of these findings.
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Affiliation(s)
| | - Fátima Jorge
- Otago Micro and Nano Imaging, Electron Microscopy Unit, University of Otago, Dunedin 9016, New Zealand
| | - Nolwenn M. Dheilly
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, USA
- ANSES, Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail - Laboratoire de Ploufragan-Plouzané, Unité Génétique Virale de Biosécurité, 22440, Ploufragan, France
| | - Robert Poulin
- Department of Zoology, University of Otago, Dunedin 9016, New Zealand
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3
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Criscione CD, Steinauer ML, Fiorillo RA, Smythe AB. Dr. William (Bill) Francis Font Jr., 11 August 1944-8 April 2022. J Parasitol 2023; 109:169-173. [PMID: 37183380 DOI: 10.1645/23-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
Affiliation(s)
- Charles D Criscione
- Charles D. Criscione, Department of Biology, Texas A&M University, 3258 TAMU, College Station, Texas 77843
| | - Michelle L Steinauer
- Michelle L. Steinauer, Department of Basic Medical Sciences, Western University of Health Sciences, 200 Mullins Dr., Lebanon, Oregon 97355
| | - Riccardo A Fiorillo
- Riccardo A. Fiorillo, Department of Biological Sciences, Georgia Gwinnett College, 1000 University Center Lane, Lawrenceville, Georgia 30043
| | - Ashleigh B Smythe
- Ashleigh B. Smythe, Department of Biology, Virginia Military Institute, 301B Maury-Brooke Hall, Lexington, Virginia 24450
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4
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Hulke JM, Criscione CD. Characterization of 21 microsatellite loci for the precocious, grass-shrimp trematode Alloglossidium renale. Mol Biochem Parasitol 2023; 254:111563. [PMID: 37086899 DOI: 10.1016/j.molbiopara.2023.111563] [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: 01/31/2023] [Revised: 04/04/2023] [Accepted: 04/19/2023] [Indexed: 04/24/2023]
Abstract
We developed microsatellite markers to use in studying the population genetics of the trematode Alloglossidium renale, a fluke with a precocious life cycle where sexual maturation occurs in a grass shrimp. Among 21 tested loci in a Mississippi population sample, 14 were polymorphic, 12 of which significantly deviated from Hardy-Weinberg Equilibrium (HWE). We estimated identity disequilibrium (ID) to confirm whether the deviations from HWE were due to significant amounts of selfing or due to technical factors. The selfing rate derived from FIS was 86.6%, whereas the selfing rate obtained by ID was 83.9%, indicating that the deviation in HWE was due to a high amount of selfing within the population. These markers will be useful for ecological and evolutionary studies of A. renale especially in relation to the interplay of hermaphroditic mating systems, inbreeding depression, and transmission dynamics.
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Affiliation(s)
- Jenna M Hulke
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, Texas 77843.
| | - Charles D Criscione
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, Texas 77843
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5
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Thorn CS, Maness RW, Hulke JM, Delmore KE, Criscione CD. Population genomics of helminth parasites. J Helminthol 2023; 97:e29. [PMID: 36927601 DOI: 10.1017/s0022149x23000123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Next generation sequencing technologies have facilitated a shift from a few targeted loci in population genetic studies to whole genome approaches. Here, we review the types of questions and inferences regarding the population biology and evolution of parasitic helminths being addressed within the field of population genomics. Topics include parabiome, hybridization, population structure, loci under selection and linkage mapping. We highlight various advances, and note the current trends in the field, particularly a focus on human-related parasites despite the inherent biodiversity of helminth species. We conclude by advocating for a broader application of population genomics to reflect the taxonomic and life history breadth displayed by helminth parasites. As such, our basic knowledge about helminth population biology and evolution would be enhanced while the diversity of helminths in itself would facilitate population genomic comparative studies to address broader ecological and evolutionary concepts.
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Affiliation(s)
- C S Thorn
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, TX, 77843, USA
| | - R W Maness
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, TX, 77843, USA
| | - J M Hulke
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, TX, 77843, USA
| | - K E Delmore
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, TX, 77843, USA
| | - C D Criscione
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, TX, 77843, USA
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6
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No Tail No Fail: Life Cycles of the Zoogonidae (Digenea). DIVERSITY 2023. [DOI: 10.3390/d15010121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The Zoogonidae is the only digenean family where known cercariae lack the tail but actively search for the second intermediate host. However, the data on the zoogonid life cycles are scarce. In the present study, we elucidated and verified life cycles of the Zoogonidae from the White Sea. Using rDNA data, we showed that Pseudozoogonoides subaequiporus utilizes gastropods from the family Buccinidae as the first intermediate host and protobranch bivalves as the second one. This life cycle can be facultatively truncated: some cercariae of P. subaequiporus encyst within the daughter sporocysts. Molecular data also confirmed previous hypotheses on Zoogonoides viviapus life cycle with buccinid gastropods acting as the first intermediate hosts, and annelids and bivalves as the second intermediate hosts. We demonstrated the presence of short tail primordium in the developing cercariae of both species. Based on the reviewed and our own data, we hypothesize that the emergence of tailless cercariae in the evolution of the Zoogonidae is linked to the switch to non-arthropod second intermediate hosts, and that it possibly happened only in the subfamily Zoogoninae. Basally branching zoogonids have retained the ancestral second intermediate host and might have also retained the tail.
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Montes MM, Arredondo NJ, Barneche JA, Balcazar D, Reig Cardarella G, Martorelli SR, Pérez-Ponce de León G. Description of Diegoglossidium maradonai n. g. and n. sp. (Digenea: Alloglossidiidae) through an integrative taxonomy approach, with an amended diagnosis of the family. J Helminthol 2022; 96:e82. [PMID: 36321435 DOI: 10.1017/s0022149x22000670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
This paper describes Diegloglossidium maradonai n. g., n. sp. a parasite of the intestine of Hoplosternum littorale (Hancock) from La Plata River basin. The new genus is morphologically similar to members of Alloglossidiidae and Macroderoidiidae although they also share some traits observed in both families. Those families can be differentiated from each other by the combination of morphological features, including the density and distribution of the tegumental spines, the distribution of the vitelline follicles and the extent of the post-testicular space. The molecular analyses based on the large subunit of the ribosomal RNA gene, and the internal transcribed spacer (ITS) regions including ITS1, 5.8S and ITS2 unequivocally place the new genus in the family Alloglossidiidae which is amended based on new observed features. Diegoglossidium n. g. is characterized by a combination of characteristics, being most notably the presence of a deeply lobed ovary. Lastly, the geographical distribution and host associations of the two closely related Neotropical genera of Alloglossidiidae: Magnivitellinum and Diegoglossidium are discussed, and the host and distribution range of Magnivitellinum saltaensis is expanded into Argentina.
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Affiliation(s)
- M M Montes
- Centro de Estudios Parasitológicos y Vectores, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata-Comisión de Investigaciones Científicas, La Plata, Argentina
| | - N J Arredondo
- Laboratorio de Sistemática y Biología de Parásitos de Organismos Acuáticos, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA, CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - J A Barneche
- Centro de Estudios Parasitológicos y Vectores, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata-Comisión de Investigaciones Científicas, La Plata, Argentina
| | - D Balcazar
- Centro de Estudios Parasitológicos y Vectores, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata-Comisión de Investigaciones Científicas, La Plata, Argentina
| | - G Reig Cardarella
- Escuela de Tecnología Médica y Centro Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo O' Higgins, Avenida Viel 1497, CP 8370993, Santiago, Chile
| | - S R Martorelli
- Centro de Estudios Parasitológicos y Vectores, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata-Comisión de Investigaciones Científicas, La Plata, Argentina
| | - G Pérez-Ponce de León
- Instituto de Biología, Universidad Nacional Autónoma de México, Mexico City, Mexico
- Escuela Nacional de Estudios Superiores Unidad Mérida (ENES-Mérida), Universidad Nacional Autónoma de México, Mérida, Yucatán, Mexico
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Pyrka E, Kanarek G, Gabrysiak J, Jeżewski W, Cichy A, Stanicka A, Żbikowska E, Zaleśny G, Hildebrand J. Life history strategies of Cotylurus spp. Szidat, 1928 (Trematoda, Strigeidae) in the molecular era – Evolutionary consequences and implications for taxonomy. Int J Parasitol Parasites Wildl 2022; 18:201-211. [PMID: 35733618 PMCID: PMC9207058 DOI: 10.1016/j.ijppaw.2022.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/07/2022] [Accepted: 06/07/2022] [Indexed: 11/05/2022]
Abstract
Species of Cotylurus Szidat, 1928 (Diplostomoidea: Strigeidae) are highly specialized digeneans that parasitize the gastrointestinal tract and bursa of Fabricius of water and wading birds. They have a three-host life cycle; the role of first intermediate host is played by pulmonate snails, while a wide range of water snails (both pulmonate and prosobranch) and leeches are reported as second intermediate hosts. Unfortunately, species richness, molecular diversity and phylogeny of metacercariae of Cotylurus spp. (tetracotyle) occurring in snails remain poorly understood. Thus, we have performed the parasitological and taxonomical examination of tetracotyles form freshwater snails from Poland, supplemented with adult Strigeidae specimens sampled from water birds. In this study we report our use of recently obtained sequences of two molecular markers (28S nuclear large ribosomal subunit gene (28S rDNA) and the cytochrome c oxidase subunit 1 (CO1) fragment), supplemented by results of a method of species delimitation (GMYC) and haplotype analysis to analyse some aspects of the ecology, taxonomy, and phylogeny of members of the genus Cotylurus. The provided phylogenetic reconstructions discovered unexpectedly high molecular diversity within Cotylurus occurring in snails, with clearly expressed evidence of cryptic diversity and the existence of several novel-species lineages. The obtained results revealed the polyphyletic character of C. syrius Dubois, 1934 (with three separate molecular species-level lineages) and C. cornutus (Rudolphi, 1809) Szidat, 1928 (with four separate molecular species-level lineages). Moreover, we demonstrated the existence of two divergent phylogenetical and ecological lineages within Cotylurus (one using leeches and other snails as second intermediate hosts), differing significantly in their life history strategies. Within Cotylurus existed two divergent phylogenetical and ecological lineages. The lineages within Cotylurus sp. differing significantly in their routes of transmission. Molecular analysis revealed high genetic diversity with evidence of cryptic species.
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Ebbs ET, Loker ES, Bu L, Locke SA, Tkach VV, Devkota R, Flores VR, Pinto HA, Brant SV. Phylogenomics and Diversification of the Schistosomatidae Based on Targeted Sequence Capture of Ultra-Conserved Elements. Pathogens 2022; 11:769. [PMID: 35890014 PMCID: PMC9321907 DOI: 10.3390/pathogens11070769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/20/2022] [Accepted: 06/27/2022] [Indexed: 01/27/2023] Open
Abstract
Schistosomatidae Stiles and Hassall 1898 is a medically significant family of digenetic trematodes (Trematoda: Digenea), members of which infect mammals or birds as definitive hosts and aquatic or amphibious gastropods as intermediate hosts. Currently, there are 17 named genera, for many of which evolutionary interrelationships remain unresolved. The lack of a resolved phylogeny has encumbered our understanding of schistosomatid evolution, specifically patterns of host-use and the role of host-switching in diversification. Here, we used targeted sequence capture of ultra-conserved elements (UCEs) from representatives of 13 of the 17 named genera and 11 undescribed lineages that are presumed to represent either novel genera or species to generate a phylogenomic dataset for the estimation of schistosomatid interrelationships. This study represents the largest phylogenetic effort within the Schistosomatidae in both the number of loci and breadth of taxon sampling. We present a near-comprehensive family-level phylogeny providing resolution to several clades of long-standing uncertainty within Schistosomatidae, including resolution for the placement of the North American mammalian schistosomes, implying a second separate capture of mammalian hosts. Additionally, we present evidence for the placement of Macrobilharzia at the base of the Schistosoma + Bivitellobilharzia radiation. Patterns of definitive and intermediate host use and a strong role for intermediate host-switching are discussed relative to schistosomatid diversification.
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Affiliation(s)
- Erika T. Ebbs
- Department of Biology, Purchase College, The State University of New York, Purchase, NY 10577, USA
| | - Eric S. Loker
- Center for Evolutionary and Theoretical Immunology, Department of Biology, Museum of Southwestern Biology Parasite Division, University of New Mexico, Albuquerque, NM 87131, USA; (E.S.L.); (L.B.); (S.V.B.)
| | - Lijing Bu
- Center for Evolutionary and Theoretical Immunology, Department of Biology, Museum of Southwestern Biology Parasite Division, University of New Mexico, Albuquerque, NM 87131, USA; (E.S.L.); (L.B.); (S.V.B.)
| | - Sean A. Locke
- Department of Biology, University of Puerto Rico at Mayagüez, Box 9000, Mayagüez 00681-9000, Puerto Rico;
| | - Vasyl V. Tkach
- Grand Forks Department of Biology, University of North Dakota, Grand Forks, ND 58202, USA;
| | - Ramesh Devkota
- Vance Granville Community College, Henderson, NC 27536, USA;
| | - Veronica R. Flores
- Laboratorio de Parasitología, INIBIOMA (CONICET-Universidad Nacional del Comahue), Quintral 1250, San Carlos de Bariloche 8400, Argentina;
| | - Hudson A. Pinto
- Department of Parasitology, Institute of Biological Science, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil;
| | - Sara V. Brant
- Center for Evolutionary and Theoretical Immunology, Department of Biology, Museum of Southwestern Biology Parasite Division, University of New Mexico, Albuquerque, NM 87131, USA; (E.S.L.); (L.B.); (S.V.B.)
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Parasites of Selected Freshwater Snails in the Eastern Murray Darling Basin, Australia. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19127236. [PMID: 35742485 PMCID: PMC9223292 DOI: 10.3390/ijerph19127236] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 06/06/2022] [Accepted: 06/09/2022] [Indexed: 02/04/2023]
Abstract
Aquatic snails serve an important role in the ecosystem. They also play an essential role in the life cycle of many parasites as hosts and may pose risks to animal and human health. In Australia, the role of snails in the transmission of parasites of livestock is well studied. However, despite the country’s unique biodiversity and wildlife, little is known about the role of snails in the transmission and survival of parasites in other ecosystems, including aquatic and aquaculture systems. This study aimed to determine the occurrence of parasites in freshwater snails in the eastern Murray Darling Basin. A total of 275 snails were collected from various localities, including aquaculture fishery ponds and natural creeks during the summer and autumn months in the southern hemisphere. Three different species of freshwater snails, all common to the area, were found, including Bullastra lessoni (n = 11), Isidorella hainesii (n = 157), and Haitia acuta (n = 107), of which 9.1%, 1.3%, and 4.7%, respectively, were found to be harboring various developmental stages of Trematoda. No other parasite was found in the examined snails. Parasites were identified as Choanocotyle hobbsi, Plagiorchis sp. and Petasiger sp. based on the sequences of their ITS2, 18S, and 28S ribosomal DNA region. Herein, we report a native parasite Choanocotyle hobbsi in an introduced snail, Haitia acuta, from both natural and aquaculture ponds. As there are no genetic sequences for adult specimens of Petasiger spp. and Plagiorchis spp. collected in Australia for comparison, whether the specimens collected in this study are the larval stage of one of the previously described species or are a new, undescribed species cannot yet be determined. Our results also suggest snails collected from aquaculture ponds may be infected with considerably more parasites.
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Shamsi S, Nuhoglu A, Zhu X, Barton DP. Genetic characterisation of cercarial stages of Choanocotyle Jue Sue and Platt, 1998 (Digenea: Choanocotylidae) in a native Australian freshwater snail, Isidorella hainesii (Tryon). INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2021; 16:48-51. [PMID: 34430197 PMCID: PMC8368346 DOI: 10.1016/j.ijppaw.2021.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/04/2021] [Accepted: 08/04/2021] [Indexed: 11/01/2022]
Abstract
Isidorella hainesii (Tryon, 1866) is a native freshwater snail, belonging to the family Planorbidae, commonly found on aquatic vegetation in south eastern parts of Australia. In the present study, we report natural infection with a species of Choanocotyle Jue Sue and Platt, 1998 (Digenea: Choanocotylidae) parasite in inland Australia for the first time, followed by characterisation of the parasite using both morphological and molecular approaches. Snails (n = 150) were collected from recently drained, natural ponds at a local fish farm located in the Riverina region, New South Wales, Australia. Parasites were subjected to preliminary morphological examination followed by DNA extraction to obtain their ITS-2, 18S and 28S sequences. Based on their sequence data and phylogenetic analyses they were identified as Choanocotyle hobbsi Platt and Tkach, 2003, which has only previously been described from Chelodina oblonga Gray, 1841 (snake-necked turtle) in Western Australia. Previous researchers suggested that in Australia, C. oblonga and its parasite fauna are separated from their eastern counterparts due to formation of impenetrable waterless desert in the country during the late Cretaceous. Our study extends the distribution of Choanocotyle hobbsi from Western Australia to the Murray Darling Basin in New South Wales, however, the definitive host remains unknown in New South Wales.
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Affiliation(s)
- Shokoofeh Shamsi
- School of Animal and Veterinary Sciences, Charles Sturt University, Wagga, Wagga, 2678, Australia
- Graham Centre for Agricultural Innovation (Charles Sturt University and NSW Department of Primary Industries), Charles Sturt University, Wagga, Wagga, 2678, Australia
- Corresponding author. School of Animal and Veterinary Sciences, Charles Sturt University, Wagga, Wagga, 2678, Australia.
| | - Alara Nuhoglu
- School of Animal and Veterinary Sciences, Charles Sturt University, Wagga, Wagga, 2678, Australia
| | - Xiaocheng Zhu
- School of Animal and Veterinary Sciences, Charles Sturt University, Wagga, Wagga, 2678, Australia
- Graham Centre for Agricultural Innovation (Charles Sturt University and NSW Department of Primary Industries), Charles Sturt University, Wagga, Wagga, 2678, Australia
- NSW Department of Primary Industries, Wagga Wagga, Australia
| | - Diane P. Barton
- School of Animal and Veterinary Sciences, Charles Sturt University, Wagga, Wagga, 2678, Australia
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Carlson CR, Schutz CL, Pagan C, Camp LE, Nadler SA. PHYLOGEOGRAPHY OF BAYLISASCARIS PROCYONIS (RACCOON ROUNDWORM) IN NORTH AMERICA. J Parasitol 2021; 107:411-420. [PMID: 34030177 DOI: 10.1645/21-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Sequences of the mitochondrial cytochrome c oxidase 1 (COI) gene of 115 Baylisascaris procyonis individuals from 13 U.S. states and 1 Canadian province were obtained from 44 raccoon hosts to assess genetic variation and geographic structure. The maximum genetic distance between individuals was low (1.6%), consistent with a single species. Moderate COI haplotype (h = 0.60) and nucleotide (π = 0.0053) diversity were found overall. Low haplotype diversity was found among samples east of the Mississippi River (h = 0.036), suggesting that historical growth and expansion of raccoon populations in this region could be responsible for high parasite gene flow or a selective sweep of B. procyonis mtDNA. There was low genetic structure (average Φst = 0.07) for samples east of the continental divide, but samples from Colorado showed higher diversity and differentiation from midwestern and eastern samples. There was marked genetic structure between samples from east and west of the continental divide, with no haplotypes shared between these regions. There was no significant isolation by distance among any of these geographic samples. The phylogeographic patterns for B. procyonis are similar to genetic results reported for their raccoon definitive hosts. The phylogeographic divergence of B. procyonis from east and west of the continental divide may involve vicariance resulting from Pleistocene glaciation and associated climate variation.
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Affiliation(s)
- Curtis R Carlson
- Department of Entomology and Nematology, University of California Davis, Davis, California 95616
| | - Cora L Schutz
- Department of Entomology and Nematology, University of California Davis, Davis, California 95616
| | - Christopher Pagan
- Department of Entomology and Nematology, University of California Davis, Davis, California 95616
| | - Lauren E Camp
- Department of Entomology and Nematology, University of California Davis, Davis, California 95616
| | - Steven A Nadler
- Department of Entomology and Nematology, University of California Davis, Davis, California 95616
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Davies D, Liquin F, Lauthier JJ, Párraga R, Saravia J, Davies C, Ostrowski de Núñez M. The life cycle of Magnivitellinum saltaensis n. sp. (Digenea: Alloglossidiidae) in Salta Province, Argentina. Parasitol Res 2021; 120:1233-1245. [PMID: 33409636 DOI: 10.1007/s00436-020-07039-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 12/22/2020] [Indexed: 10/22/2022]
Abstract
We describe the alloglossiid trematode Magnivitellinum saltaensis n. sp., a parasite of the characiform fish Psalidodon endy, and its life cycle from Salta, northwest of Argentina. This is the first life cycle described for a species belonging to the genus Magnivitellinum. Cercariae emerged naturally from Biomphalaria tenagophila snails and infected experimentally exposed larvae of Diptera and Ephemeroptera as second intermediate hosts. These larvae in turn were exposed to commercially raised fish, and adults were recovered from characiform albino fish Gymnocorymbus ternetzi. Molecular analysis of natural and experimental adults showed the same genetic sequence for the partial region of 28S rDNA, thus confirming conspecificity. Comparison of these sequences with those published for M. simplex from Mexico showed 1.45% divergence, indicating that the specimens found in Salta belong to a different species, the third described of Magnivitellinum, in agreement with morphological data, geographical location, and host species composition. The new species is distinguished by its small body, vitelline follicles extending from the mid-level of the ventral sucker, Y-shaped excretory vesicle, and presence of papillae around the mouth.
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Affiliation(s)
- Dora Davies
- Instituto para el Estudio de la Biodiversidad de Invertebrados, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Av. Bolivia 5150, Salta, 4400, Argentina.
| | - Florencia Liquin
- Instituto para el Estudio de la Biodiversidad de Invertebrados, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Av. Bolivia 5150, Salta, 4400, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Juan José Lauthier
- Parasitology Department, Kochi Medical School, Kochi University, Okocho Kohasu, Nankoku, Kochi Prefecture, 783-8505, Japan
| | - Regina Párraga
- Instituto para el Estudio de la Biodiversidad de Invertebrados, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Av. Bolivia 5150, Salta, 4400, Argentina
| | - José Saravia
- Instituto para el Estudio de la Biodiversidad de Invertebrados, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Av. Bolivia 5150, Salta, 4400, Argentina
| | - Carolina Davies
- Instituto de Patología Experimental, Universidad Nacional de Salta-CONICET, Salta, Argentina
| | - Margarita Ostrowski de Núñez
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428, Buenos Aires, Argentina
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Davies K, Pagan C, Nadler SA. Host Population Expansion and the Genetic Architecture of the Pinniped Hookworm Uncinaria lucasi. J Parasitol 2020; 106:383-391. [PMID: 32491171 DOI: 10.1645/19-172] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The long-term fidelity of pinniped hosts to their natal rookery site suggests the genetic architecture of their Uncinaria spp. hookworms should be strongly structured by host breeding biology. However, historical events affecting host populations may also shape parasite genetic structure. Sequences of the mitochondrial cytochrome c oxidase 1 (COI) gene of 86 Uncinaria lucasi individuals were obtained to assess genetic variation and structure of nematodes from 2 host species (68 hookworms from northern fur seals; 18 hookworms from Steller sea lions) and rookeries from 3 widely separated geographic regions: the western Bering Sea and Sea of Okhotsk, eastern Bering Sea, and the eastern Pacific Ocean. High COI haplotype (h = 0.96-0.98) and nucleotide (π = 0.014) diversity was found. The haplotype network showed a star-shaped pattern with a large number of haplotypes separated by few substitutions. The network did not show separation of U. lucasi by geographic region or host species. Fst values between U. lucasi individuals representing geographic regions showed no differentiation, consistent with the absence of genetic structure. At face value, this lack of genetic structure in U. lucasi suggests high gene flow but could also be explained by recent (post-glacial) population expansions of northern fur seals and their hookworms.
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Affiliation(s)
- Keely Davies
- Department of Entomology and Nematology, University of California Davis, Davis, California 95616
| | - Chris Pagan
- Department of Entomology and Nematology, University of California Davis, Davis, California 95616
| | - Steven A Nadler
- Department of Entomology and Nematology, University of California Davis, Davis, California 95616
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Selected Wildlife Trematodes. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1154:321-355. [DOI: 10.1007/978-3-030-18616-6_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Idris OA, Wintola OA, Afolayan AJ. Helminthiases; prevalence, transmission, host-parasite interactions, resistance to common synthetic drugs and treatment. Heliyon 2019; 5:e01161. [PMID: 30775568 PMCID: PMC6357211 DOI: 10.1016/j.heliyon.2019.e01161] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/17/2018] [Accepted: 01/21/2019] [Indexed: 01/08/2023] Open
Abstract
The morbidity caused by parasite worms on susceptible hosts is of great concern and studies were carried out to explain the mechanism of infection, prevalence, host-parasite interaction and resistance of the parasite to treatment. This review elucidates the prevalence of parasitic worm infections; which is on the increases with the increase in the world population, global warming, poor standard of living particularly in troubled regions and developing nations. The neglect of the disease coupled with the resistance of these parasites to the few available drugs becomes a huge challenge that influences global disease burden. Helminths infections pose a life threat and increase the disability-adjusted life year (DALYs) of the poor and vulnerable people. On the other hand, exploration of medicinal plants as an alternative source of treatment against drugs resistance helminths, attract insufficient attention. This review focused on providing a general overview of the prevalence of helminths, host-parasite interactions, the resistance of helminths and the medicinal plants used to treat helminthic infections.
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Affiliation(s)
- Oladayo Amed Idris
- Medicinal Plants and Economic Development (MPED) Research Centre, Department of Botany, University of Fort Hare, Alice, 5700, South Africa
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