Changes in the Trematode Fauna of Clams in the Little Brazos River, Texas

Gentner, Harry W.; Hopkins, Sewell H.

doi:10.2307/3276309

Cited by 16 publications

(6 citation statements)

References 4 publications

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“…B in that river. Hopkins (1937) reported that cercariae of H. armatum developed in a hydrobiid snail from the Little Brazos River in Texas, U.S.A., and Gentner and Hopkins (1966) reported the metacercariae of H. armatum from 1 sphaeriid bivalve and 6 unionid bivalves, also from the Little Brazos River. During occasional examinations of bivalves from the Pascagoula River and surrounding habitats during the past 15 yr we have not encountered apocreadiid metacercariae, but we suspect systematic examination of large numbers of various bivalve species would be necessary to determine whether they serve as hosts in the region.…”

Section: Discussionmentioning

confidence: 98%

Molecular Evidence for Two Cryptic Species ofHomalometron(Digenea: Apocreadiidae) in Freshwater Fishes of the Southeastern United States

Curran

Tkach

Overstreet

2013

Comparative Parasitology

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Section: Discussionmentioning

confidence: 98%

Molecular Evidence for Two Cryptic Species ofHomalometron(Digenea: Apocreadiidae) in Freshwater Fishes of the Southeastern United States

Curran

Tkach

Overstreet

2013

Comparative Parasitology

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“…159,175 Other associated gross lesions include shell deformation, nacre deposits (ie, pearls), or nacre staining of the inner shell surface. 68,73,146 More typically, larvae are observed histologically, where presumptive taxonomical diagnosis is based on host species, larval stage, size and shape of larvae, and tissue infected. 112 Definitive diagnosis requires parallel subgross morphological examination and molecular techniques for identification.…”

Section: Aspidogastrea and Digeneamentioning

confidence: 99%

“…also tend to encyst in the mantle. 68,175 Homalometron spp. sporocysts and metacercariae infect a wide variety of tissues.…”

Section: Aspidogastrea and Digeneamentioning

confidence: 99%

“…41,75 Microscopic lesions associated with larval digeneans may be absent or include parenchymal compression or atrophy, variable hemocyte encapsulation, and nacrezation when involving the mantle. 41,68,140 The variation in severity and cellular composition of hemocyte response induced by different trematode larvae species has not been well studied in unionids.…”

Section: Aspidogastrea and Digeneamentioning

confidence: 99%

“…133 Microscopic examination of pearls postdecalcification can demonstrate the presence of parasites centrally. 68…”

Section: Gross Pathologymentioning

confidence: 99%

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Pathology and infectious agents of unionid mussels: A primer for pathologists in disease surveillance and investigation of mortality events

et al. 2023

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Freshwater mussels are one of the most imperiled groups of organisms in the world, and more than 30 species have gone extinct in the last century. While habitat alteration and destruction have contributed to the declines, the role of disease in mortality events is unclear. In an effort to involve veterinary pathologists in disease surveillance and the investigation of freshwater mussel mortality events, we provide information on the conservation status of unionids, sample collection and processing techniques, and unique and confounding anatomical and physiological differences. We review the published accounts of pathology and infectious agents described in freshwater mussels including neoplasms, viruses, bacteria, fungi, fungal-like agents, ciliated protists, Aspidogastrea, Digenea, Nematoda, Acari, Diptera, and Odonata. Of the identified infectious agents, a single viral disease, Hyriopsis cumingii plague disease, that occurs only in cultured mussels is known to cause high mortality. Parasites including ciliates, trematodes, nematodes, mites, and insects may decrease host fitness, but are not known to cause mortality. Many of the published reports identify infectious agents at the light or ultrastructural microscopy level with no lesion or molecular characterization. Although metagenomic analyses provide sequence information for infectious agents, studies often fail to link the agents to tissue changes at the light or ultrastructural level or confirm their role in disease. Pathologists can bridge this gap between identification of infectious agents and confirmation of disease, participate in disease surveillance to ensure successful propagation programs necessary to restore decimated populations, and investigate mussel mortality events to document pathology and identify causality.

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Chemical and Isotopic Tracer Evaluation of Water Mixing and Evaporation in a Dammed Texas River During Drought

2016

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Changes in the Trematode Fauna of Clams in the Little Brazos River, Texas

Cited by 16 publications

References 4 publications

Molecular Evidence for Two Cryptic Species ofHomalometron(Digenea: Apocreadiidae) in Freshwater Fishes of the Southeastern United States

Molecular Evidence for Two Cryptic Species ofHomalometron(Digenea: Apocreadiidae) in Freshwater Fishes of the Southeastern United States

Pathology and infectious agents of unionid mussels: A primer for pathologists in disease surveillance and investigation of mortality events

Chemical and Isotopic Tracer Evaluation of Water Mixing and Evaporation in a Dammed Texas River During Drought

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