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Articles 1 - 30 of 59
Full-Text Articles in Life Sciences
Phylogenetic Relationships Among Species Of Stilestrongylus Freitas, Lent And Almeida, 1937 (Trichostrongyloidea: Heligmonellidae: Nippostrongylinae), Parasites Of Myomorph Rodents (Rodentia: Muridae) In The Neotropics, Gerardo Perez-Ponce De Leon, Scott Lyell Gardner, Jorge Falcon-Ordaz
Phylogenetic Relationships Among Species Of Stilestrongylus Freitas, Lent And Almeida, 1937 (Trichostrongyloidea: Heligmonellidae: Nippostrongylinae), Parasites Of Myomorph Rodents (Rodentia: Muridae) In The Neotropics, Gerardo Perez-Ponce De Leon, Scott Lyell Gardner, Jorge Falcon-Ordaz
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
The phylogenetic relationships of 14 species of Stilestrongylus were analyzed using the comparative morphology of 21 characters. We obtained 2 shortest trees of 50 steps, with a consistency index of 0.540 and 25 apomorphic character states. Ingroup monophyly was supported on these trees by 2 and 3 synapomorphies, respectively, and the ingroup was defined by the following characters: greater number of ventral ridges relative to the number of ridges dorsally, asymmetric bursa, and externodorsal rays differing in size. Sister-group relationships among Stilestrongylus and the other genera designated as outgroups are relatively consistent with those postulated by Durette-Desset’s in a classification …
Distribution And Impact Of The Oyster Parasite Bonamia Ostreae In Maine, And Its Detection Using Dna Probes, Ryan Carnegie
Distribution And Impact Of The Oyster Parasite Bonamia Ostreae In Maine, And Its Detection Using Dna Probes, Ryan Carnegie
Electronic Theses and Dissertations
Health management efforts in Maine related to the flat oyster (Ostrea edulis) parasite Bonamia ostreae are limited by a lack of knowledge of the parasite’s distribution and impact in both wild and cultured populations. This information would be more readily obtainable with improved diagnostic tools. The objectives of this dissertation were to design sensitive and specific DNA probes for detection of B. ostreae; to assess the prevalence and intensity of parasite infections in wild oyster populations in Maine; and to evaluate growth and mortality of cultured oysters in the Damariscotta River, where B. ostreae is enzootic. A polymerase …
Amino Acid Osmolytes In Regulatory Volume Decrease And Isovolumetric Regulation In Brain Cells: Contribution And Mechanisms, Herminia Pasantes-Morales, Rodrigo Franco, M. Eugenia Torres-Marquez, Karla Hernandez-Fonseca, Arturo Ortega
Amino Acid Osmolytes In Regulatory Volume Decrease And Isovolumetric Regulation In Brain Cells: Contribution And Mechanisms, Herminia Pasantes-Morales, Rodrigo Franco, M. Eugenia Torres-Marquez, Karla Hernandez-Fonseca, Arturo Ortega
School of Veterinary and Biomedical Sciences: Faculty Publications
Brain adaptation to hyposmolarity is accomplished by loss of both electrolytes and organic osmolytes, including amino acids, polyalcohols and methylamines. In brain in vivo, the organic osmolytes account for about 35% of the total solute loss. This review focus on the role of amino acids in cell volume regulation, in conditions of sudden hyposmosis, when cells respond by active regulatory volume decrease (RVD) or after gradual exposure to hyposmotic solutions, a condition where cell volume remains unchanged, named isovolumetric regulation (IVR). The amino acid efflux pathway during RVD is passive and is similar in many respects to the volume-activated anion …
A New Species Of Eimeria (Apicomplexa, Eimeriidae) From The Weedy Sea Dragon Phyllopteryx Taeniolatus (Osteichthyes: Syngnathidae), Steve J. Upton, M. Andrew Stamper, Andrea L. Osborn, Sonia L. Mumford, Laura Zwick, Michael J. Kinsel, Robin M. Overstreet
A New Species Of Eimeria (Apicomplexa, Eimeriidae) From The Weedy Sea Dragon Phyllopteryx Taeniolatus (Osteichthyes: Syngnathidae), Steve J. Upton, M. Andrew Stamper, Andrea L. Osborn, Sonia L. Mumford, Laura Zwick, Michael J. Kinsel, Robin M. Overstreet
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
A new species of intestinal coccidian is described from the weedy or common sea dragon Phyllopteryx taeniolatus housed at the New England Aquarium in Boston and at the Shedd Aquarium in Chicago, USA. Live oocysts of Eimeria phyllopterycis sp. n. are spherical, 30.9 (28.0-34.4) μm, with a thin, single-layered wall. Both a micropyle and oocyst residuum are absent and a large polar granule is sometimes present. Sporocysts are ellipsoidal and elongate, 24.3 × 10.4 (23.4-25.6 × 9.2-11.2) μm, with Stieda and substieda bodies; shape index (length/width) 2.33 (2.14-2.70). A sporocyst residuum is present, consisting of numerous granules of various sizes. …
American Society Of Parasitologists Newsletter, V. 22, No. 3, September 2000, Scott Lyell Gardner
American Society Of Parasitologists Newsletter, V. 22, No. 3, September 2000, 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.
Halipegus Eschi N. Sp. (Digenea: Hemiuridae) In Rana Vaillanti From Guanacaste Province, Costa Rica, Derek A. Zelmer, Daniel R. Brooks
Halipegus Eschi N. Sp. (Digenea: Hemiuridae) In Rana Vaillanti From Guanacaste Province, Costa Rica, Derek A. Zelmer, Daniel R. Brooks
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Halipegus eschi n. sp. is described from the esophagus of Rana vaillanti from Guanacaste Province, Costa Rica. The new species differs from other known species of Halipegus on the basis of relative testis size, lateral extent of the uterus, vitelline follicle arrangement, egg size, and polar filament length.
Emergence Of Third-Stage Larvae Of Umingmakstrongylus Pallikuukensis From Three Gastropod Intermediate Host Species, Susan K. Kutz, Eric P. Hoberg, Lydden Polley
Emergence Of Third-Stage Larvae Of Umingmakstrongylus Pallikuukensis From Three Gastropod Intermediate Host Species, Susan K. Kutz, Eric P. Hoberg, Lydden Polley
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
We investigated the emergence of third-stage larvae (L3) of Umingmakstrongylus pallikuukensis from the slugs Deroceras laeve, Deroceras reticulatum, and the snail Catinella sp. in the laboratory and from D. laeve on the tundra. Third-stage larvae emerged from 8 of 8 D. laeve and 8 of 8 D. reticulatum housed at 20°C in darkness and from 9 of 10 D. laeve and 5 of 5 Catinella sp. housed at 21°C with 10-12 hours of light/day. Larvae emerged from D. laeve and D. reticulatum over a wide range of infection intensities (2-179 and 20-65, respectively), and the patterns of emergence …
La Notion De Danger, Jean M. Kanellopoulos, David M. Ojcius
La Notion De Danger, Jean M. Kanellopoulos, David M. Ojcius
All Dugoni School of Dentistry Faculty Articles
Pendant de nombreuses années, les recherches en immunologie ont été centrées sur la réponse immunitaire adaptative, et la plupart des immunologistes considéraient que sa fonction principale était de faire la distinction entre soi et non soi. Plus récemment, plusieurs équipes ont proposé que la fonction principale du système immunitaire est en réalité d’éliminer les agents pathogènes. Or, c’est le système immunitaire inné, longtemps négligé, qui joue un rôle essentiel dans l’induction d’une réponse contre les microorganismes. Ce système réagit précocement aux infections, voire instantanément, puis il induit et oriente la réponse du système adaptatif. Plusieursthéories ont été élaborées pour expliquer …
American Society Of Parasitologists Newsletter, V. 22, No. 2, [Summer 2000], Scott Lyell Gardner
American Society Of Parasitologists Newsletter, V. 22, No. 2, [Summer 2000], 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.
Reassignment Of Lamanema From Nematodirinae To Molineinae (Nematoda: Trichostrongyloidea) (Research Notes), Lora G. Rickard, Eric P. Hoberg
Reassignment Of Lamanema From Nematodirinae To Molineinae (Nematoda: Trichostrongyloidea) (Research Notes), Lora G. Rickard, Eric P. Hoberg
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
The monospecific Lamanema historically has been assigned to the Nematodirinae within the Molineidae. Inconsistencies in morphological characters, within a phylogenetic context for Nematodirinae, led to a re-evaluation of the putative relationships and taxonomic placement of Lamanema. Among 7 putative synapomorphies for Nematodirinae, Lamanema possesses only one, large eggs. Large eggs, sporadically present in phylogenetically disparate taxa of trichostrongyles, are equivocal with respect to placement of Lamanema; it is considered that possession of this single homoplasious character alone is insufficient justification to retain the genus in Nematodirinae. Affinities with the Trichostrongylidae (Cooperiinae or Haemonchinae) have also been proposed; however, …
Relationships Of Nematodirus Species And Nematodirus Battus Isolates (Nematoda: Trichostrongyloidea) Based On Nuclear Ribosomal Dna Sequences, Steven A. Nadler, Eric P. Hoberg, Deborah S.S. Hudspeth, Lora G. Rickard
Relationships Of Nematodirus Species And Nematodirus Battus Isolates (Nematoda: Trichostrongyloidea) Based On Nuclear Ribosomal Dna Sequences, Steven A. Nadler, Eric P. Hoberg, Deborah S.S. Hudspeth, Lora G. Rickard
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Nuclear ribosomal sequence data from the internal transcribed spacers (ITS-1 and ITS-2), 5.8S subunit, and regions of the 18S and 28S genes were used to investigate sequence diversity among geographic samples of Nematodirus battus, and to infer phylogenetic relationships among Nematodirus species. Phylogenetic analysis of these data yielded strong support for relationships among species, depicting Nematodirus helvetianus and Nematodirus spathiger as sister-taxa and a clade of these two species and Nematodirus filicollis. This tree is consistent with caprine bovids as ancestral hosts, with a subsequent host shift to Bovinae in N. helvetianus. Eleven of 14 N. battus …
Phylogeny Of The Species Of The Genus Litomosoides (Nematatoda: Onchocercidae): Evidence Of Rampant Host Switching, Sara V. Brant, Scott Lyell Gardner
Phylogeny Of The Species Of The Genus Litomosoides (Nematatoda: Onchocercidae): Evidence Of Rampant Host Switching, Sara V. Brant, Scott Lyell Gardner
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Filarioid nematodes of the genus Litomosoides occur in the abdominal and (or) thoracic cavities of marsupials, rodents, and bats of the Nearctic and Neotropical regions. In this study, the phylogenetic relationships among these nematodes were estimated with a parsimony analysis of morphological characters derived from species descriptions. This nonweighted analysis produced 20 shortest trees. The monophyly of the genus was not supported in that Litomosoides thomomydis and Litomosoides westi failed to group with the other members of the genus. When these 2 taxa (parasites of pocket gophers) were excluded, monophyly of Litomosoides was supported by 2 synapomorphies (structure of the …
Parasite Community Structure In Pimephales Promelas (Pisces: Cyprinidae) From Two Converging Streams, M. A. Weichman, John A. Janovy Jr.
Parasite Community Structure In Pimephales Promelas (Pisces: Cyprinidae) From Two Converging Streams, M. A. Weichman, John A. Janovy Jr.
John Janovy Publications
Parasites of the fathead minnow, Pimephales promelas, were examined in fish collected from Elk Creek (40.88534°N, 96.83366°W) and West Oak Creek (40.90821°N, 96.81432°W), Lancaster County, Nebraska. These two streams are part of the Salt Valley watershed and flow together approximately 2 km downstream from the collection sites to form Oak Creek. This study examined the extent to which the two tributaries constitute a continuous habitat with respect to fish hosts. The parasite community included Trichodina sp., Myxobolus sp., Dactylogyrus simplex, D. bychowskyi, and D. pectenatus (all on gills); Gyrodactylus hoffmani (gill and body surface); Posthodiplostomum sp. (neascus, body …
Host Specificity In Metamera Sillasenorum, N. Sp., A Gregarine Parasite Of The Leech Helobdella Triserialis With Notes On Transmission Dynamics, Megan R. Wise De Valdez, John J. Janovy Jr., John C. Wise
Host Specificity In Metamera Sillasenorum, N. Sp., A Gregarine Parasite Of The Leech Helobdella Triserialis With Notes On Transmission Dynamics, Megan R. Wise De Valdez, John J. Janovy Jr., John C. Wise
John Janovy Publications
Eugregarines of the suborder Septatorina are apicomplexan parasites that are found mainly in arthropods. Some exceptions are species in the Metameridae that contains the only 5 septate gregarines recorded from annelids. The type genus is Metamera Duke, 1910 with two species, Metamera schubergi Duke, 1910, in European Glossiphonia complanata, and Metamera reynoldsi Jones, 1943, from North American G. complanata. Over the summers of 1995-1998, in Keith County, Nebraska, septate gregarines were found in the glossiphoniid leech Helobdella triserialis. The gregarines were determined to be a new species of Metamera, herein named Metamera sillasenorum. Measurements of size …
Efflux Of Osmolyte Amino Acids During Isovolumic Regulation In Hippocampal Slices, Rodrigo Franco, Octavio Quesada, Herminia Pasantes-Morales
Efflux Of Osmolyte Amino Acids During Isovolumic Regulation In Hippocampal Slices, Rodrigo Franco, Octavio Quesada, Herminia Pasantes-Morales
School of Veterinary and Biomedical Sciences: Faculty Publications
The efflux of potassium (K+) and amino acids from hippocampal slices was measured after sudden exposure to 10% (270 mOsm), 25% (225 mOsm) or 50% (150 mOsm) hyposmotic solutions or after gradual decrease (22.5 mOsm/min) in external osmolarity. In slices suddenly exposed to 50% hyposmotic solutions, swelling was followed by partial (74%) cell volume recovery, suggesting regulatory volume decrease (RVD). With gradual hyposmotic changes, no increase in cell water content was observed even when the solution at the end of the experiment was 50% hyposmotic, showing the occurrence of isovolumic regulation (IVR). The gradual decrease in osmolarity elicited …
American Society Of Parasitologists Newsletter, V. 22, No. 1, April 1, 2000, Scott Lyell Gardner
American Society Of Parasitologists Newsletter, V. 22, No. 1, April 1, 2000, 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.
Effect Of Chlamydia Trachomatis Infection And Subsequent Tnfa Secretion On Apoptosis In The Murine Genital Tract, Jean-Luc Perfettini, Toni Darville, Gabriel Gachelin, Philippe Souque, Michel Huerre, Alice Dautry-Varsat, David M. Ojcius
Effect Of Chlamydia Trachomatis Infection And Subsequent Tnfa Secretion On Apoptosis In The Murine Genital Tract, Jean-Luc Perfettini, Toni Darville, Gabriel Gachelin, Philippe Souque, Michel Huerre, Alice Dautry-Varsat, David M. Ojcius
All Dugoni School of Dentistry Faculty Articles
The pathology observed during Chlamydia infection is due initially to localized tissue damage caused by the infection itself, followed by deleterious host inflammatory responses that lead to permanent scarring. We have recently reported that the infection byChlamydia in vitro results in apoptosis of epithelial cells and macrophages and that infected monocytes secrete the proinflammatory cytokine interleukin-1β. At the same time, proinflammatory cytokines such as tumor necrosis factor alpha (TNF-α) can also trigger apoptosis of susceptible cells. To study the possible relationship between Chlamydia trachomatis infection and apoptosis in vivo, we used the terminal deoxynucleotidyltransferase-mediated dUTP nick end labeling technique to …
Natural Transfer Of Helminths Of Marine Origin To Freshwater Fishes, With Observations On The Development Of Diphyllobothrium Alascence, Robert L. Rausch, Ann M. Adams
Natural Transfer Of Helminths Of Marine Origin To Freshwater Fishes, With Observations On The Development Of Diphyllobothrium Alascence, Robert L. Rausch, Ann M. Adams
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Infective stages of helminths of 5 species that occur as adults in marine mammals were found in burbot, Lota lota (L.) (Gadidae), from the lower Kuskokwim River (southwestern Alaska): Diphyllobothrium alascense Rausch et Williamson, 1958; Pyramicocephalus phocarum (Fabricius, 1780); Corynosoma strumosum (Rudolphi, 1801); Corynosoma semerme (Forsell, 1904); and Pseudoterranova decipiens (Krabbe, 1878). Some larval stages were obtained also from smelt, Osmerus mordax dentex Steindachner, an anadromous fish important as prey of burbot. Burbot, which are freshwater fish, could become paratenic hosts of those helminths by means of at least three interactions: by consuming marine fishes in brackish waters at river …
Diffusion Problems In Wound Healing And A Scattering Approach To Immune System Interactions, Julia Suzanne Arnold
Diffusion Problems In Wound Healing And A Scattering Approach To Immune System Interactions, Julia Suzanne Arnold
Mathematics & Statistics Theses & Dissertations
A theoretical model for the existence of a Critical Size Defect (CSD) in certain animals is the focus of the majority of this dissertation. Adam [1] recently developed a one-dimensional model of this phenomenon, and chapters I–V address the exist the CSD in a two-dimensional model and a three-dimensional model. The two dimensional (or 1-d circular) model is the more appropriate for a study of CSD's. In that model we assume a circular wound of uniform depth and develop a time-independent form of the diffusion equation relevant to the study of the CSD phenomenon. It transpires that the range of …
Medical And Social Diseases: Can The Former Moderate The Latter?, Ibpp Editor
Medical And Social Diseases: Can The Former Moderate The Latter?, Ibpp Editor
International Bulletin of Political Psychology
This article describes how medical disease may moderate social disease in an era of globalization.
A Phylogenetic Hypothesis For Species Of The Genus Taenia (Eucestoda: Taeniidae), Eric P. Hoberg, Arlene Jones, Robert L. Rausch, Keeseon S. Eom, Scott Lyell Gardner
A Phylogenetic Hypothesis For Species Of The Genus Taenia (Eucestoda: Taeniidae), Eric P. Hoberg, Arlene Jones, Robert L. Rausch, Keeseon S. Eom, Scott Lyell Gardner
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Cladistic analysis of a numerical data matrix describing 27 characters for species of Taenia resulted in four most parsimonious phylogenetic trees (174 steps; consistency index = 0.28; homoplasy index = 0.72; retention index = 0.48). Monophyly for Taenia is diagnosed by the metacestode that is either a cysticercus or a form derived from a bladder-like larva; no other unequivocal synapomorphies are evident. Tree structure provides no support for recognition of a diversity of tribes or genera within the Taeniinae: Fimbriotaeniini and Taeniini have no phylogenetic basis. Hydatigera, Fimbriotaenia, Fossor, Monordotaenia, Multiceps, Taeniarhynchus, Tetratirotaenia must …
Helminthoxys Abrocomae N. Sp. (Nematoda: Oxyurida) From Abrocoma Cinerea In Bolivia, Jean-Pierre Hugot, Scott Lyell Gardner
Helminthoxys Abrocomae N. Sp. (Nematoda: Oxyurida) From Abrocoma Cinerea In Bolivia, Jean-Pierre Hugot, Scott Lyell Gardner
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
A new pinworm parasite is described from Abrocoma cinerea, a caviomorph rodent of the superfamily Octodontoidea from the Andes of Bolivia. The new species, Helminthoxys abrocomae n. sp., possesses special secretory mamelons which we consider a synapomorphy of the genus Helminthoxys. Within Helminthoxys, the closest relatives are found in octodontoid rodents: H. gigantea occurs in Octodon degus in Chile and O. bridgesi in Argentina, and H. freitasi is a parasite of Thrichomys aperoides in Brazil. H. abrocomae n. sp. differs from both other species morphometrically in relation to different parts of the body in both sexes, particularly …
Status Of The Major Oyster Diseases In Virginia 1999 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1999 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Reports
As a consequence of the relatively warm temperatures and high salinities severe epizootics of both H. nelsoni and P. marinus occurred in most tributaries in VA. In the upper James River, VA prevalences and intensities of P. marinus were the highest on record. The proportion of advanced infections (moderate and heavy intensity) in October was 60% at Wreck Shoal and 48% at Horsehead Rock suggesting that significant oyster mortalities occurred in these areas. 1 Record high levels of P. marinus were also observed in Virginia's other major tributaries. Of the 39 bay oyster populations surveyed in the fall, P. marinus …
Arthropod And Helminth Parasites From The Plains Pocket Gopher, Geomys Bursarius Bursarius From The Hosts' Northern Boundary Range In Minnesota, Monroe H. Bartel, Scott Lyell Gardner
Arthropod And Helminth Parasites From The Plains Pocket Gopher, Geomys Bursarius Bursarius From The Hosts' Northern Boundary Range In Minnesota, Monroe H. Bartel, Scott Lyell Gardner
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
As part of a continuing and more general study of the diversity of parasites from subterranean mammals in central North America, individuals of the Plains pocket gopher, Geomys bursarius bursarius, were collected from 7 localities in northwestern Minnesota from September 1991 through October 1996. Arthropods collected included the fleas, Opisocrostis bruneri (4 of 124, 3.20/0), Foxella ignota ignota (85 of 124, 68.50/0); the chewing louse, Geomydoecus geomydis geomydis from 98 of 124 (790/0), and larvae of the tick, Dermacentor variabilis (1 of 124, 0.8%). Nematodes found included Physaloptera limbata (2 of 118 gophers, 1.7%), Capillaria americana (4 of 118, …
Integronlike Structures In Campylobacter Spp. Of Human And Animal Origin, Brigid Lucey, D. Crowley, P. Moloney, B. Cryan, M. Daly, F. O'Halloran, E. J. Threlfall, S. Fanning
Integronlike Structures In Campylobacter Spp. Of Human And Animal Origin, Brigid Lucey, D. Crowley, P. Moloney, B. Cryan, M. Daly, F. O'Halloran, E. J. Threlfall, S. Fanning
Department of Biological Sciences Publications
Resistance to antimicrobial agents used to treat severe Campylobacter spp. gastroenteritis is increasing worldwide. We assessed the antimicrobial resistance patterns of Campylobacter spp. isolates of human and animal origin. More than half (n = 32) were resistant to sulphonamide, a feature known to be associated with the presence of integrons. Analysis of these integrons will further our understanding of Campylobacter spp. epidemiology.
Bibliography Of Parasites And Vertebrate Hosts In Arizona, New Mexico And Texas (1893–1984), Lillian F. Mayberry, Albert G. Canaris, John R. Bristol, Scott Lyell Gardner
Bibliography Of Parasites And Vertebrate Hosts In Arizona, New Mexico And Texas (1893–1984), Lillian F. Mayberry, Albert G. Canaris, John R. Bristol, Scott Lyell Gardner
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
TABLE OF CONTENTS:
Introduction • Tables
Parasite-Host Bibliography: Protozoa • Cestoda • Trematoda • Nemata • Aanthocephala • Arthropoda • Acarina-Mite • Acarina-Tick • Copepoda-Crustacea • Insecta-Diptera • Insecta-Hemiptera • Insecta-Mallophaga and Anoplura • Insecta-Siphonaptera • Pentastomida • Class Unknown
Host-Parasite Bibliography: Scientific Name • Common Name
Literature Cited
Theses and Dissertations not Referenced
Acknowledgments
This bibliographic listing of parasites and hosts reported from Arizona, New Mexico and Texas has been prepared to facilitate literature searches by parasitologists and others needing such information. In the Parasite-Host Bibliography, parasites have been categorized into major taxonomic groups, assigned a number (left column) …
Isovolumic Regulation In Nervous Tissue: A Novel Mechanism Of Cell Volume Regulation, O. Quesada, R. Franco, K. Hernandez-Fonseca, K. Tuz
Isovolumic Regulation In Nervous Tissue: A Novel Mechanism Of Cell Volume Regulation, O. Quesada, R. Franco, K. Hernandez-Fonseca, K. Tuz
School of Veterinary and Biomedical Sciences: Faculty Publications
Cell volume regulation is a property present in most animal cell lineages that allows them to recover their original volume after events of swelling or shrinkage. Such events can be caused by changes in external osmolarity or to osmotic gradients generated during normal cell functioning.4,6 The mechanism of cell volume regulation involves transmembrane fluxes of osmotically active solutes in the necessary direction to counteract the net gain or loss of intracellular water.9 The process through which cells recover their normal volume after swelling is named Regulatory Volume Decrease (RVD). This consists of the efflux of inorganic osmolytes, such as K …
Pentoxifylline Modulation Of The Cytotoxic T-Cell Differentiation Pathway To Enhance Immunological Memory, Eric Goodspeed
Pentoxifylline Modulation Of The Cytotoxic T-Cell Differentiation Pathway To Enhance Immunological Memory, Eric Goodspeed
Inquiry: The University of Arkansas Undergraduate Research Journal
Immunological memory, acquired either by previous infection or vaccination, affords vertebrates a large margin of survival. Subsequent exposure to a "remembered" pathogen signals memory cells to undergo a rapid, clonal proliferation into armed effector cells. This rapidly mobilized clone mediates the specific clearance of the trespassing pathogen. Typically, this secondary recall response effectively dispatches the particular pathogen prior to any manifest disease pathology. This is the age-old, enjoyed benefit of immunity. Though this appreciation for immunological memory has been in documentation for nearly 3 millennia, our ability to intentionally increase its normal level of formation is only now beginning. The …
A New Eimeria Sp. From The Plumbeous Central American Caecilian, Dermophis Mexicanus (Amphibia: Gymnophiona) From Volcán, Tajumulco, Department Of San Marcos, Guatemala, Ingrid M. Asmundsson, Jonathan A. Campbell, Donald W. Duszynski
A New Eimeria Sp. From The Plumbeous Central American Caecilian, Dermophis Mexicanus (Amphibia: Gymnophiona) From Volcán, Tajumulco, Department Of San Marcos, Guatemala, Ingrid M. Asmundsson, Jonathan A. Campbell, Donald W. Duszynski
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Fresh fecal samples from 5 caecilians (Dermophis mexicanus) were collected and examined for coccidia in the summer of 1998. The caecilians were collected in the Department of San Marcos, Guatemala. Two of the 5 (40%) specimens of caecilians contained an Eimeria species that is described here as new. This represents the first coccidia described from a gymnophionian host. Sporulated oocysts are spheroidal to subspheroidal, 19.5 × 17.7 (16–23 × 15–21) μm, micropyle and oocyst residuum are absent, and 3 (or more) polar granules are always present. Sporocysts are ovoidal, 11.0 × 7.2 (10–12 × 6–9); a Stieda body …
Elaeophorosis In Red Deer From Spain, Mónica Santín-Durán, J. M. Alunda, J. M. San Miguel, Eric P. Hoberg, C. De La Fuente
Elaeophorosis In Red Deer From Spain, Mónica Santín-Durán, J. M. Alunda, J. M. San Miguel, Eric P. Hoberg, C. De La Fuente
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Elaeophorosis, caused by Elaeophora elaphi, was observed in red deer (Cervus elaphus) from Toledo Province (Spain) for the first time. Adult specimens of Elaeophora elaphi were found in the hepatic vessels of nine of 151 red deer between October 1994 and September 1995; intensity of infection was two to 18 nematodes per host. Adult nematodes were only found during the period from fall through early spring. No differences were present between sex or age groups. Parasites were not found in a limited sample from fallow deer (Dama dama). Blood samples were negative for the presence of …