Open Access. Powered by Scholars. Published by Universities.®

Parasitology Commons™

Open Access. Powered by Scholars. Published by Universities.®

University of Nebraska - Lincoln

Discipline
Keyword
Publication Year
Publication
Publication Type

Articles 721 - 750 of 1787

Full-Text Articles in Parasitology

Ecology And Host Specificity Of Laelapine Mites (Acari: Laelapidae) Of Small Mammals In An Atlantic Forest Area Of Brazil, Fernanda Martins-Hatano, Donald Gettinger, Helena G. Bergallo Jan 2002

Ecology And Host Specificity Of Laelapine Mites (Acari: Laelapidae) Of Small Mammals In An Atlantic Forest Area Of Brazil, Fernanda Martins-Hatano, Donald Gettinger, Helena G. Bergallo

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Mesostigmaticm ites of the Laelapinae Berlese, 1892 (Acari:Laelapidae) are nidicolous arthropods that commonly occur in the fur of Neotropical small mammmals. In this 2-yr study, the laelapine acarofauna associated with the small mammal community in an area of Atlantic forest on Ilha Grande, Rio de Janeiro State, was examined, including observations on patterns of host specificity, mite dispersal, ecology, and food habits. A total of 1,347 laelapines was sampled from the pelage of 6 species of small mammals( Marmosops incanus, Nectomyss quamipes, Oryzomys russatus, Rhipidomys n. sp., Oxymycterus dasytrichus, and Trinomys dimidiatus), all of which occurred exclusively in …

Go to article

Development Of The Muskox Lungworm, Umingmakstrongylus Pallikuukensis (Protostrongylidae), In Gastropods In The Arctic, Susan J. Kutz, Eric P. Hoberg, John Nishi, Lydden Polley Jan 2002

Development Of The Muskox Lungworm, Umingmakstrongylus Pallikuukensis (Protostrongylidae), In Gastropods In The Arctic, Susan J. Kutz, Eric P. Hoberg, John Nishi, Lydden Polley

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Development of the muskox protostrongylid lungworm, Umingmakstrongylus pallikuukensis, in its slug intermediate host, Deroceras laeve, was investigated under field conditions in the Arctic. Every two weeks, from 19 June to 28 August 1997, groups of ten experimentally infected slugs were placed in tundra enclosures in a mesic sedge meadow near Kugluktuk, Nunavut, Canada. First-stage larvae (L1) infecting slugs on or before 17 July developed to third-stage larvae (L3) in 4–6 weeks. Intensity of L3 in slugs peaked at 6–8 weeks post infection (PI) and then progressively declined by 10, 12, and 48–50 weeks PI. Abundance of L3 in …

Go to article

Phylogenetic Positions Of The Bothitrematidae And Neocalceostomatidae (Monopisthocotylean Monogeneans) Inferred From 28s Rdna Sequences, Jean-Lou Justine, Richard Jovelin, Lassâd Neifar, Isabelle Mollaret, L.H. Susan Lim, Sherman S. Hendrix, Louis Euzet Jan 2002

Phylogenetic Positions Of The Bothitrematidae And Neocalceostomatidae (Monopisthocotylean Monogeneans) Inferred From 28s Rdna Sequences, Jean-Lou Justine, Richard Jovelin, Lassâd Neifar, Isabelle Mollaret, L.H. Susan Lim, Sherman S. Hendrix, Louis Euzet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A molecular phylogeny was inferred from newly obtained partial (D1 domain) 28S rDNA gene sequences of Bothitrema bothi (Bothitrematidae), Neocalceostoma sp. (Neocalceostomatidae), Bravohollisia sp. (Ancyrocephalidae), and other already available sequences of Ancyrocephalidae, Anoplodiscidae, Pseudodactylogyridae, and Sundanonchidae, with the Diplectanidae as outgroup. Bothitrema, Anoplodiscus, and Sundanonchus formed a very robust clade that was the sister group to a group that included all other species examined. In this latter group, Neocalceostoma and Thaparocleidus were basal to a clade in which the Ancyrocephalidae and Pseudodactylogyridae were sister groups. Molecular results that suggest inclusion of the families Bothitrematidae, Anoplodiscidae, and Sundanonchidae in …

Go to article

Detection Of Giardia Duodenalis Antigen In Coprolites Using A Commercially Available Enzyme-Linked Immunosorbent Assay, Marcelo Luiz Carvalho Gonçalves, Adauto Araújo, Rosemere Duarte, Joaquim Pereira Da Silva, Karl Reinhard, Françoise Bouchet, Luis Fernando Ferreira Jan 2002

Detection Of Giardia Duodenalis Antigen In Coprolites Using A Commercially Available Enzyme-Linked Immunosorbent Assay, Marcelo Luiz Carvalho Gonçalves, Adauto Araújo, Rosemere Duarte, Joaquim Pereira Da Silva, Karl Reinhard, Françoise Bouchet, Luis Fernando Ferreira

Karl Reinhard Publications

The objective of this experiment was to assess the utility of a commercially available enzyme-linked immunosorbent assay (ELISA) kit for diagnosis of giardiasis in archaeological human remains. The kit, a monoclonal antibody assay, is used to detect the presence of Giardia-specific antigen 65 (GSA65) in human feces. We utilized the assay in ancient fecal material. The material included desiccated feces found in mummies or in archaeological sites, and sediments from latrines. A total of 83 specimens, previously examined microscopically for parasites, were examined. The ELISA detected 3 positive samples, dated to about 1200 AD, 1600 AD, and 1700 AD. …

Go to article

Multidisciplinary Coprolite Analysis, Karl Reinhard, Dennis R. Danielson, Mark Daniels, Sérgio Augusto De Miranda Chaves Jan 2002

Multidisciplinary Coprolite Analysis, Karl Reinhard, Dennis R. Danielson, Mark Daniels, Sérgio Augusto De Miranda Chaves

Karl Reinhard Publications

Coprolite analysis, as reviewed by Reinhard and Bryant (1992), contributes unique and detailed information regarding diet and parasitic disease. We present here an analysis of dietary components of coprolites from Bighorn Cave using macroscopic remains, pollen concentrations, and phytoliths. In addition, we analyzed Bighorn Cave coprolites for evidence of parasitic organisms, especially intestinal worms. Such analyses of coprolites have become important methods for reconstructing past dietary and medicinal practices. Pollen concentration and phytolith quantification techniques have recently been developed, but until this report no known attempt has been made to synthesize pollen, macroscopic, and phytolith data from a single coprolite …

Go to article

Recommended Terminology And Advances In The Systematics Of The Cyathostominea (Nematoda: Strongyloidea) Of Horses, J. Ralph Lichtenfels, L. M. Gibbons, R. C. Krecek Jan 2002

Recommended Terminology And Advances In The Systematics Of The Cyathostominea (Nematoda: Strongyloidea) Of Horses, J. Ralph Lichtenfels, L. M. Gibbons, R. C. Krecek

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Terminology for common names for the Tribe Cyathostominea (cyathostomins), and disease caused by the nematodes (cyathostominosis), were recommended to replace the previously used names cyathostomes and cyathostomosis, which are ambiguous, inaccurate or synonymous, by the Third Internal Workshop on the Systematics of Cyathostominea of Horses, held in Stresa, Italy, 28 August 2001. The progress by this international working group at three workshops is reviewed briefly and a list of publications is provided. Included are an annotated checklist by genus and species of 93 species level names and the recognition of 52 species, redescriptions of seven species, and the description of …

Go to article

A Preliminary Analysis Of Proteolytic Activity Of Excretory-Secretory Products From Cyathostominea, Jane L. Kinsella, J. Ralph Lichtenfels, Michael F. Ryan Jan 2002

A Preliminary Analysis Of Proteolytic Activity Of Excretory-Secretory Products From Cyathostominea, Jane L. Kinsella, J. Ralph Lichtenfels, Michael F. Ryan

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The excretory-secretory product (ESP) derived from Cyathostominea in vitro was assessed, in terms of subunit composition, and proteolytic activity using as substrates azocasein and two synthetic fluorogenic peptides. Sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) resolved 13 subunits, and the presence of the protein cysteine proteinase activator dithiothreitol (DTT) revealed 21 subunits.DTTalso enhanced azocaseinolysis, and hydrolysis of carbobenzoxy-phenylalanyl-arginine-7-amido-4-methylcoumarin (Z-Phe-Arg-NHMec) and carbobenzoxy-arginyl-arginine-7-amido-4-methylcoumarin (Z-Arg-Arg-NHMec). At the optimum pH of 5.5, hydrolysis of Z-Phe-Arg-NHMec was three-fold greater than that of Z-Arg-Arg-NHMec suggesting that the proteolytic specificities of the ESP are more like those of papain or cathepsin L, rather than cathepsin B. In SDS-PAGE …

Go to article

Identification And Characterisation Of A Cdna Sequence Encoding A Glutamic Acid-Rich Protein Specifically Transcribed In Trichinella Spiralis Newborn Larvae And Recognised By Infected Swine Serum, Dante S. Zarlenga, Patricia Boyd, J. Ralph Lichtenfels, Dolores Hill, H. Ray Gamble Jan 2002

Identification And Characterisation Of A Cdna Sequence Encoding A Glutamic Acid-Rich Protein Specifically Transcribed In Trichinella Spiralis Newborn Larvae And Recognised By Infected Swine Serum, Dante S. Zarlenga, Patricia Boyd, J. Ralph Lichtenfels, Dolores Hill, H. Ray Gamble

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Presently, little is known of the mechanism by which Trichinella penetrates and modulates reprogramming of muscle cells. In light of evidence demonstrating strong protective characteristics of antigens derived from this stage, understanding this process may shed light on potential targets for effective abatement of infection. To this end, a PCR-derived cDNA expression library was constructed using 0.5 mg of total RNA from Trichinella spiralis newborn larvae. The library consisted of >125,000 insert-containing clones. Approximately 40-50 × 103 clones were screened immunologically using sera from pigs experimentally infected with 7,000 Trichinella L1. Multiple clones reacting positively with the swine infection …

Go to article

Foundations For An Integrative Parasitology: Collections, Archives, And Biodiversity Informatics, Eric P. Hoberg Jan 2002

Foundations For An Integrative Parasitology: Collections, Archives, And Biodiversity Informatics, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Burgeoning awareness about biodiversity emphasizes the fundamental importance of museum collections and the contributions of systematists and taxonomists in documenting the structure and history of the biosphere. An essential role is served by this infrastructure in collecting, preparing, analyzing, and disseminating information about the specimens that represent species, document a range of complex biological associations from symbioses to parasitism, and form the tapestry and the myriad facets of biodiversity (e.g., Wilson, 2000). As parasitologists we can examine how we may contribute to this broader documentation and understanding of global biodiversity, and we can articulate and communicate our role as vital …

Go to article

Protostrongylus Stilesi (Nematoda: Protostrongylidae): Ecological Isolation And Putative Host-Switching Between Dall’S Sheep And Muskoxen In A Contact Zone, Eric P. Hoberg, Susan J. Kutz, John Nagy, Emily Jenkins, Brett Elkin, Marsha Branigan, Dorothy Cooley Jan 2002

Protostrongylus Stilesi (Nematoda: Protostrongylidae): Ecological Isolation And Putative Host-Switching Between Dall’S Sheep And Muskoxen In A Contact Zone, Eric P. Hoberg, Susan J. Kutz, John Nagy, Emily Jenkins, Brett Elkin, Marsha Branigan, Dorothy Cooley

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The occurrence of Protostrongylus stilesi in a population of introduced muskoxen, Ovibos moschatus wardi, on the Arctic Coastal Plain, Yukon Territory (YT) and Northwest Territories (NT), Canada, is consistent with a contemporary colonization event from Dall’s sheep, Ovis dalli dalli, which indicates that host specificity may be ecologically based and contextual for this parasite. Colonization of muskoxen by P. stilesi may be a predictable event in zones of sympatry with Dall’s sheep; exposure to infection may coincide with occupation of winter ranges of Dall’s sheep by muskoxen during the summer season. Disruption of contemporary ecological isolating barriers can …

Go to article

Coccidia (Apicomplexa: Eimeriidae) Of The Mammalian Order Chiroptera, Donald W. Duszynski Jan 2002

Coccidia (Apicomplexa: Eimeriidae) Of The Mammalian Order Chiroptera, Donald W. Duszynski

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The coccidia are protists (phylum Apicomplexa) that, likely, are both the most abundant (numbers of individual zoites) and most speciose of all the kinds of parasites found in/on mammals. They also are among the least studied and understood, with the exception of those species that cause pathology in domesticated Artiodactyla. In this review, I focus only on the largest family of the phylum, Eimeriidae Minchin, 1903, because its members often are among the most prevalent apicomplexans of mammals, and because there has never been a taxonomic summation for those species that infect Chirpotera. In all published descriptions of bat coccidia, …

Go to article

Ultrastructure Of Tuzetia Weidneri Sp. N. (Microsporidia: Tuzetiidae) In Skeletal Muscle Of Litopenaeus Setiferus And Farfantepenaeus Aztecus (Crustacea: Decapoda) And New Data On Perezia Nelsoni (Microsporidia: Pereziidae) In L. Setiferus, Elizabeth U. Canning, Alan Curry, Robin M. Overstreet Jan 2002

Ultrastructure Of Tuzetia Weidneri Sp. N. (Microsporidia: Tuzetiidae) In Skeletal Muscle Of Litopenaeus Setiferus And Farfantepenaeus Aztecus (Crustacea: Decapoda) And New Data On Perezia Nelsoni (Microsporidia: Pereziidae) In L. Setiferus, Elizabeth U. Canning, Alan Curry, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A new microsporidian species, Tuzetia weidneri sp. n. , is described from the skeletal muscle of the decapod crustaceans Litopenaeus setiferus and Farfantepenaeus aztecus. Fresh spores are pyriform, measuring 3.1 x 2.3 µm. All stages have unpaired nuclei. Meronts lie in direct contact with degenerate host cell cytoplasm but produce numerous small blisters at the surface. Multinucleate meronts divide by constriction into groups or chains of uninucleate products. Sporogony is initiated by deposition of a dense surface coat on the plasma membrane of uninucleate or multinucleate stages and fusion of blisters to enclose the sporont in a sporophorous vesicle …

Go to article

The Structure Of The Nucleus Of Odonaticola Polyhamatus (Gregarinea: Actinocephalidae), A Parasite Of Mnais Strigata (Hagen) (Odonata: Calopterygidae), Kasumi Hoshide, John J. Janovy Jr. Jan 2002

The Structure Of The Nucleus Of Odonaticola Polyhamatus (Gregarinea: Actinocephalidae), A Parasite Of Mnais Strigata (Hagen) (Odonata: Calopterygidae), Kasumi Hoshide, John J. Janovy Jr.

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The nucleus of Odonaticola polyhamatus was isolated from the body and observed with light, scanning electron and transmission electron microscopy. The nucleus had a thick thread-like structure with which it was tied to the septum. This thread-like structure has not been reported or described previously. The gregarine nuclear surface was covered with a fine fibrous net. This is the first report of the surface structure of a gregarine nucleus as revealed by SEM. Inside the nuclear membrane was a thin honeycomb layer similar to that reported for some other gregarines. Several spherical nucleoli and numerous electron dense small structures were …

Go to article

Potential Pathological Effects Of Blood Flukes (Digenea: Sanguinicolidae) On Pen-Reared Marine Fishes, Stephen A. Bullard, Robin M. Overstreet Jan 2002

Potential Pathological Effects Of Blood Flukes (Digenea: Sanguinicolidae) On Pen-Reared Marine Fishes, Stephen A. Bullard, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Sanguinicolids, or fish blood flukes, infect the vascular system of both marine and freshwater fishes, and some act as serious pathogens of hosts in aquaculture. Blood flukes typically possess a relatively benign relationship with wild fishes; however, cultured hosts near appropriate intermediate hosts (i.e., snail, bivalve, or polychaete) may accumulate heavy infections of the worms and their eggs. The resulting disease, sanguinicoliasis, has caused mass mortalities of fish reared in ponds and cages in North America, Europe, and Asia. In the life cycle, the cercaria emerges from the intermediate invertebrate host and penetrates into and matures in the definitive fish …

Go to article

Hydrobiid Snails (Mollusca: Gastropoda: Rissooidea) From St. Andrew Bay, Florida, Richard W. Heard, Robin M. Overstreet, John M. Foster Jan 2002

Hydrobiid Snails (Mollusca: Gastropoda: Rissooidea) From St. Andrew Bay, Florida, Richard W. Heard, Robin M. Overstreet, John M. Foster

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Heleobops sp. of Hershler and Thompson appears to be the only previously published record for the gastropod family Hydrobiidae Troschel in tidal waters of the St. Andrew Bay System, Florida. Six species occurred in bayous, marshes, and brackish ponds associated with the System during studies conducted between 1984 and 1999: Texadina barretti (Morrison), Texadina sphinctostoma Abbott and Ladd, Littoridinops monroensis (Frauenfeld), Littoridinops palustris Thompson, Onobops jacksoni (Bartsch), and Heleobops sp. A. The last is an apparently undescribed species closely related to Heleobops carrikeri Davis and McKee. Based in part on this study, Heleobops sp. A, which occurs in brackish habitats …

Go to article

Morphological Variation Of Allocreadium Lobatum (Digenea: Allocreadiidae) In The Creek Chub, Semotilus Atromaculatus (Osteichthyes: Cyprinidae), In Nebraska, Usa, Monte S. Willis Jan 2002

Morphological Variation Of Allocreadium Lobatum (Digenea: Allocreadiidae) In The Creek Chub, Semotilus Atromaculatus (Osteichthyes: Cyprinidae), In Nebraska, Usa, Monte S. Willis

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Allocreadium lobatum Wallin 1909, a parasite of fresh-water fish, was originally described as having distinct lobate testes, and subsequent descriptions have left this original description unchanged. The present study quantifies the observation of distinctly non-lobate testes that could be categorized as round or asymmetrical in addition to the previously described lobate testes. Six hundred thirty-six A. lobatum were collected from 228 Semotilus atromaculatus over a 9 month period. Overall, 21.3%, 61.6%, and 16% were found to be round, asymmetrical, and lobate testes respectively (N = 1,071). Analysis of testis morphology found the increasing presence of lobate testis as …

Go to article

Morphological And Molecular Description Of Haematoloechus Meridionalis N. Sp. (Digenea: Plagiorchioidea: Haematoloechidae) From Rana Vaillanti Brocchi Of Guanacaste, Costa Rica, Virginia León-Règagnon, Daniel R. Brooks, Derek A. Zelmer Dec 2001

Morphological And Molecular Description Of Haematoloechus Meridionalis N. Sp. (Digenea: Plagiorchioidea: Haematoloechidae) From Rana Vaillanti Brocchi Of Guanacaste, Costa Rica, Virginia León-Règagnon, Daniel R. Brooks, Derek A. Zelmer

Harold W. Manter Laboratory of Parasitology: Faculty Publications

An undescribed species of Haematoloechus inhabits the lungs of Rana vaillanti in northwestern Costa Rica. The new species is most similar morphologically to H. medioplexus, having a very small, but well-developed, ventral sucker and lacking extracecal uterine loops, and apparently was misidentified previously as H. medioplexus in Rana palmipes from Colombia. It differs from H. medioplexus, notably by (1) the shape of the oral sucker, which is elliptical in H. meridionalis and spherical in H. medioplexus; (2) the posterior extent of the vitelline fields, which terminate at the same level in H. medioplexus, but always at …

Go to article

Physid Snails As Sentinels Of Freshwater Nematomorphs, Ben Hanelt, L. E. Grother, John J. Janovy Jr. Oct 2001

Physid Snails As Sentinels Of Freshwater Nematomorphs, Ben Hanelt, L. E. Grother, John J. Janovy Jr.

John J. Janovy, Jr. Publications

Freshwater nematomorphs, or gordiids, are parasitic as larvae, but free-living in aquatic environments as adults. Studies based on the collection of adults have reported gordiids to be widespread, but discontinuous in distribution. However, a relatively short adult life span and unknown life history make the detection of adults difficult. An alternative approach to investigate gordiid distribution is to use cysts. Of all paratenic hosts, snails were chosen because they lacked internal defense reactions to the cysts and become easily infected. Here, it is reported that the occurrence of gordiids on the basis of the cyst stage is much more common …

Go to article

Epimerite-Host Epithelium Relationships Among Eugregarines Parasitizing The Damselflies Enallagma Civile And Ischnura Verticalis, Tamara J. Percival Cook, John J. Janovy Jr., Richard E. Clopton Oct 2001

Epimerite-Host Epithelium Relationships Among Eugregarines Parasitizing The Damselflies Enallagma Civile And Ischnura Verticalis, Tamara J. Percival Cook, John J. Janovy Jr., Richard E. Clopton

John J. Janovy, Jr. Publications

The host-parasite interface between two species of damselflies and four species of eugregarines was examined at the ultrastructural level. Nubenocephalus nebraskensis organisms attached to the host midgut epithelium by means of a sucker-like protomerite; the space between the epicytic folds and host epithelium was filled with electron-dense material interpreted to be adhesive in nature. Actinocephalus carrilynnae organisms attached by means of the epimerite, which had no epicytic folds, and by the fluted stalk with characteristic epicytic folds; host cell and parasite membranes appeared fused at some places on the epimerite. Hoplorhynchus acanthatholius organisms attached by means of an ovoid epimerite …

Go to article

Description Of Buckarootrema Goodmani N. G., N. Sp. (Digenea: Pronocephalidae), A Parasite Of The Freshwater Turtle Emydura Macquarii (Gray, 1830) (Pleurodira: Chelidae) From Queensland, Australia, And A Phylogenetic Analysis Of The Genera Of The Pronocephalidae Looss, 1902, Thomas R. Platt, Daniel R. Brooks Oct 2001

Description Of Buckarootrema Goodmani N. G., N. Sp. (Digenea: Pronocephalidae), A Parasite Of The Freshwater Turtle Emydura Macquarii (Gray, 1830) (Pleurodira: Chelidae) From Queensland, Australia, And A Phylogenetic Analysis Of The Genera Of The Pronocephalidae Looss, 1902, Thomas R. Platt, Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Buckarootrema goodmani n. g., n. sp. is described from the small intestine of the Murray turtle, Emydura macquarii (Gray, 1830), from the vicinity of Warwick, Queensland, Australia. The distinctive taxonomic features include the vitellarium, which consists of two compact masses directly anterior to and occasionally overlapping the testes; the uterus with extensive pre- and postovarian coils; intestinal ceca with small, medial diverticula that terminate anterior to or at the anterior margin of the testes; a comma-shaped cirrus sac with both internal and external seminal vesicles. Phylogenetic systematic analysis of the genera of the Pronocephalidae including Buckarootrema and Notopronocephalus, …

Go to article

American Society Of Parasitologists Newsletter, V. 23, No. 2, August 2001, Scott Lyell Gardner Jul 2001

American Society Of Parasitologists Newsletter, V. 23, No. 2, August 2001, Scott Lyell Gardner

American Society of Parasitologists: Newsletter

An issue of the American Society of Parasitologists' quarterly newsletter, also called the Journal of Parasitology Newsletter.

Go to article

The Response Of Gregarina Niphandrodes (Apicomplexa: Eugregarinida: Septatina) To Host Starvation In Tenebrio Molitor (Coleoptera: Tenebrionidae) Adults, Jennifer E. Schawang, John J. Janovy Jr. Jun 2001

The Response Of Gregarina Niphandrodes (Apicomplexa: Eugregarinida: Septatina) To Host Starvation In Tenebrio Molitor (Coleoptera: Tenebrionidae) Adults, Jennifer E. Schawang, John J. Janovy Jr.

John J. Janovy, Jr. Publications

Numerous studies of host starvation have emphasized pathological effects of parasites on their insect host, but little attention has been focused on the effects of host starvation on the parasites. This study addressed the possibility that parasite life-cycle events could be manipulated by withholding food from the host. The system used was Gregarina niphandrodes (Apicomplexa: Eugregarinida) in Tenebrio molitor (Coleoptera: Tenebrionidae) adults. Gregarine gametocyst formation and shedding ceased after one day in starved beetles but continued in fed controls. There were no statistically significant differences between total lengths of associated (3 of 5 trials) or unassociated (5 of 5 trials) …

Go to article

Vexillata Liomyos N. Sp. (Nemata: Ornithostrongylidae) From Liomys Pictus (Rodentia: Heteromyidae) From Mexico, With Comments On The Synlophe Of Vexillata Armandae, Jorge Falcon-Ordaz, Scott Lyell Gardner, Gerardo Perez-Ponce De Leon Jun 2001

Vexillata Liomyos N. Sp. (Nemata: Ornithostrongylidae) From Liomys Pictus (Rodentia: Heteromyidae) From Mexico, With Comments On The Synlophe Of Vexillata Armandae, Jorge Falcon-Ordaz, Scott Lyell Gardner, Gerardo Perez-Ponce De Leon

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Individuals of a new species of Vexillata were collected from the small intestines of Liomys pictus from the Estacio´n de Biologı´a Chamela, in Jalisco State, Mexico. The new species shows an array of characters that allow us to recognize it as a member of Vexillata; however, it can be distinguished from other species of the genus in that males possess an asymmetrical caudal bursa, females possess a characteristic cuticular inflation at the level of the ovijector, and both sexes possess a synlophe with 9 ridges at the midbody. Additional detail of the synlophe of Vexillata armandae Gardner et al., …

Go to article

Anindobothrium N. Gen. (Eucestoda: Tetraphyllidea) Inhabiting Marine And Freshwater Potamotrygonid Stingrays, Fernando P.L. Marques, Daniel R. Brooks, Carlos A. Lasso Jun 2001

Anindobothrium N. Gen. (Eucestoda: Tetraphyllidea) Inhabiting Marine And Freshwater Potamotrygonid Stingrays, Fernando P.L. Marques, Daniel R. Brooks, Carlos A. Lasso

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Anindobothrium n. gen. is proposed to accommodate Caulobothrium anacolum inhabiting Himantura schmardae from Colombia, and two new species, one inhabiting Potamotrygon orbigny in Brazil and the other inhabiting Paratrygon aereiba in Venezuela. Members of the new genus resemble members of Pararhinebothroides, Rhinebothroides, and Anthocephalum by having bothridia with poorly differentiated apical suckers and vasa deferentia expanded into external seminal vesicles. It further resembles Pararhinebothroides, Rhinebothroides, and Anthocephalum cairae by having vas deferens inserted near the poral rather than aporal end of the cirrus sac. The 3 species assigned to the new genus form an apparent monophyletic …

Go to article

Parasite Systematics In The 21st Century: Opportunities And Obstacles, Daniel R. Brooks, Eric P. Hoberg Jun 2001

Parasite Systematics In The 21st Century: Opportunities And Obstacles, Daniel R. Brooks, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Taxonomic names and phylogenetic hypotheses are indispensable tools for modern biological research, both basic and applied. Like all disciplines, parasitology suffers from the ‘taxonomic impediment’ – a global shortage of professional taxonomists and systematists. Only a fraction of the species of parasites on this planet have been identified, and the evolutionary relationships of only a minority of those are understood; thus, information on how to manage parasite biodiversity, including known and potential disease agents, is incomplete. A renewal of systematic parasitology has a key role in redefining the relationship between mankind and the organisms whose biology fascinates us so much.

Go to article

Persistent Fontanelles In Rodent Skulls, Scott Lyell Gardner, Sydney Anderson Apr 2001

Persistent Fontanelles In Rodent Skulls, Scott Lyell Gardner, Sydney Anderson

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Persistent fenestrae occur between frontal or parietal bones in skulls of various rodents, especially species of Andinomys and Ctenomys. The frequency of occurrence and the shape and position of the fenestrae may vary with age or among individuals, populations, and species. Different families and species from both high and low elevations exhibit fenestrae. They have arisen in several different evolutionary lineages. Genetic factors contribute, but no clear functional significance of the fenestrae has been established.

Go to article

American Society Of Parasitologists Newsletter, V. 23, No. 1, January 2001, Scott Lyell Gardner Apr 2001

American Society Of Parasitologists Newsletter, V. 23, No. 1, January 2001, Scott Lyell Gardner

American Society of Parasitologists: Newsletter

An issue of the American Society of Parasitologists' quarterly newsletter, also called the Journal of Parasitology Newsletter.

Go to article

Evolution In The Information Age: Rediscovering The Nature Of The Organism, Daniel R. Brooks Mar 2001

Evolution In The Information Age: Rediscovering The Nature Of The Organism, Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The newest synthesis of evolutionary thought is emerging, and promises to return evolutionary biology to Darwin’s panoramic view of life. The key element is a long-standing dualism in evolutionary theory. This dualism has a long history within evolutionary biology, being manifested under guises such as: (1) the nature of the organism and the nature of the conditions, (2) internal and external, or intrinsic and extrinsic, factors, (3) production and exchanges, (4) boundary and initial conditions, (5) metabolism and replication, (6) energy and information, and (7) costs and benefits, and conflict and resolution. A partially retrospective review suggests that there is …

Go to article

Characterization Of The Laminated Layer Of In Vitro Cultivated Echinococcus Vogeli Metacestodes, Katrin Ingold, Wenjuan Dai, Robert L. Rausch, Bruno Gottstein, Andrew Hemphill Feb 2001

Characterization Of The Laminated Layer Of In Vitro Cultivated Echinococcus Vogeli Metacestodes, Katrin Ingold, Wenjuan Dai, Robert L. Rausch, Bruno Gottstein, Andrew Hemphill

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The metacestode (larval) stages of the cestode parasites Echinococcus vogeli and E. multilocularis were isolated from the peritoneal cavity of experimentally infected C57BL/6 mice and were cultured in vitro for a period of up to four months under conditions normally applied for the in vitro cultivation of E. multilocularis metacestodes. In contrast to E. multilocularis, E. vogeli did not exhibit extensive exogenous budding and proliferation but increased in size with a final diameter of up to 10 mm. Most metacestodes contained protoscoleces, singly or in groups, either associated with brood capsules or growing directly out of the germinal layer. …

Go to article

Biotic And Abiotic Effects On Endoparasites Infecting Dipodomys And Perognathus Species, Kimberly H. Decker, Donald W. Duszynski, Michael J. Patrick Jan 2001

Biotic And Abiotic Effects On Endoparasites Infecting Dipodomys And Perognathus Species, Kimberly H. Decker, Donald W. Duszynski, Michael J. Patrick

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Between 1989 and 1998, 3,504 rodents of the genera Dipodomys and Perognathus were collected from 4 permanent collecting sites on the University of New Mexico’s Long Term Ecological Research station, located on the Sevilleta National Wildlife Refuge (SNWR), Socorro County, New Mexico. All animals were killed and examined for endoparasites (acanthocephalans, cestodes, coccidia, and nematodes). The present report focuses on 3 endoparasite groups, cestodes, coccidia, and nematodes. Specific analyses address how prevalence changes were related to abiotic factors such as habitat, season, or precipitation, and how prevalence of each parasite species in each host species differed in relation to host …

Go to article

First Prev Next Last