Parasitology Commons^™

Systematic Review Of Gastrointestinal Nematodes Of Horses From Australia, Muhammad A. Saeed, Ian Beveridge, Ghazanfar Abbas, Anne Beasley, Jenni Bauquier, Edwina Wilkes, Caroline Jacobson, Kris J. Hughes, Charles El-Hage, Ryan O'Handley, John Hurley, Lucy Cudmore, Peter Carrigan, Lisa Walter, Brett Tennent-Brown, Martin K. Nielsen, Abdul Jabbar

Maxwell H. Gluck Equine Research Center Faculty Publications

Background: Equine gastrointestinal nematodes (GINs) have been the subject of intermittent studies in Australia over the past few decades. However, comprehensive information on the epidemiology of equine GINs, the efficacy of available anthelmintic drugs and the prevalence of anthelmintic resistance (AR) in Australasia is lacking. Herein, we have systematically reviewed existing knowledge on the horse GINs recorded in Australia, and main aspects of their pathogeneses, epidemiology, diagnoses, treatment and control.

Methods: Six electronic databases were searched for publications on GINs of Australian horses that met our inclusion criteria for the systematic review. Subsets of publications were subjected to review epidemiology, …

The Sucking Louse Fauna Of Mongolian Rodents: Host Associations, Molecular Phylogenetics And Description Of Two New Species, Chase N. Robinson

Honors College Theses

This study aimed to screen Mongolian rodents for sucking lice (Insecta: Phthiraptera: Anoplura) to better understand host-parasite associations for this understudied region. Nine species, including 3 previously undescribed, from 4 genera were identified. A molecular phylogeny based on 2 mitochondrial genes of collected louse specimens is included.

The Ecological Niche Of Echinococcus Multilocularis In North America: Understanding Biotic And Abiotic Determinants Of Parasite Distribution With New Records In New Mexico And Maryland, United States, Sebastian Botero-Cañola, Altangerel Tsogtsaikhan Dursahinhan, Sara E. Rácz, Parker V. Lowe, John E. Ubelaker, Scott Lyell Gardner

Scott L. Gardner Publications

English abstract: Understanding the factors shaping the niche of parasites and its expression over geographical space and through time continues to be a modern scientific challenge with the results of research in this area directly influencing both theoretical and applied biology. This is especially important for proactive management of zoonotic parasites such as Echinococcus multilocularis, the etiologic agent of alveolar echinococcosis. Echinococcus multilocularis has a Holarctic distribution; with its geographic range and prevalence increasing recently in areas of the western Palearctic, while its distribution dynamics are poorly understood in the Nearctic. In this paper, we use an ecological niche …

Blood Parasites Infecting The Hoatzin (Opisthocomus Hoazin), A Unique Neotropical Folivorous Bird, M. Andreína Pacheco, M. Alexandra García-Amado, Jaime Manzano, Nubia E. Matta, Ananias A. Escalante

Harold W. Manter Laboratory of Parasitology: Library Materials

The Hoatzin (Opisthocomus hoazin) is the only extant member of the order Opisthocomiformes. This unique South American bird lives in the riparian lowland vegetation characteristic of the Amazon and Orinoco basins. Hoatzins nest in communal social units close to water bodies; they are strictly folivores being the only bird with pregastric fermentation in the crop. Because of the complex logistics involved in capturing this bird, there is a knowledge gap on its parasites. This study documents two distant lineages of haemosporidian parasites (Plasmodium spp.) in a juvenile and two adults sampled in the Cojedes state, Venezuela. Although …

Plasmodium Para-Aminobenzoate Synthesis And Salvage Resolve Avoidance Of Folate Competition And Adaptation To Host Diet, Joachim Michael Matz, Mutsumi Watanabe, Mofolusho Falade, Takayuki Tohge, Rainer Hoefgen, Kai Matuschewski

Pharmaceutical Sciences Faculty Publications

Folate metabolism is essential for DNA synthesis and a validated drug target in fast-growing cell populations, including tumors and malaria parasites. Genome data suggest that Plasmodium has retained its capacity to generate folates de novo. However, the metabolic plasticity of folate uptake and biosynthesis by the malaria parasite remains unresolved. Here, we demonstrate that Plasmodium uses an aminodeoxychorismate synthase and an aminodeoxychorismate lyase to promote the biogenesis of the central folate precursor para-aminobenzoate (pABA) in the cytoplasm. We show that the parasite depends on de novo folate synthesis only when dietary intake of pABA by …

White Grub In Bluegill In The Sangamon River: Impact Of Sewage Effluent And Flow Regime On Infection Parameters, Miranda White

Masters Theses

White grub (Posthodiplostomum minimum) is a digenetic trematode that uses a piscivorous bird, a pulmonate snail, and a centrarchid fish to complete its life cycle. To assess the impact of impoundment and sewage effluent on white grub infection parameters, infections in bluegill (Lepomis macrochirus) were monitored in 3 reaches of the Sangamon River near Decatur, Illinois: Reach 1- free-flowing river upstream of Lake Decatur Dam, unimpacted by sewage effluent, Reach 2- impounded flow below Lake Decatur Dam, unimpacted by sewage effluent, and Reach 3- free-flowing river downstream of Sanitary District of Decatur, impacted by sewage effluent. Liver and kidney abundances …

Taxonomic Revision Of The Haemaphysalis (Rhipistoma) Spinulosa Subgroup, Parasites Of Carnivores And Other Mammals In Sub-Saharan Africa, Jackson A. Tomlinson

College of Graduate Studies: Theses & Dissertations

Nine new species of Haemaphysalis are here described based on a morphological analysis of 7,077 adult specimens stored in the U.S. National Tick Collection (Georgia Southern, Statesboro, USA) and collected from various carnivores (Carnivora: Canidae, Felidae, Herpestidae, Hyaenidae, Mustelidae, Nandiniidae, Viverridae) and hedgehogs (Erinaceomorpha: Erinaceidae); few specimens were found on hares (Lagomorpha: Leporidae), various rodents (Rodentia: Bathyergidae, Cricetidae, Muridae, Nesomyidae, Pedetidae, Sciuridae, Spalacidae) and other mammals (Artiodactyla, Chiroptera, Hyracoidea, Perissodactyla, Primates, and Soricomorpha) in 29 sub-Saharan African countries. In addition to descriptions of new species, 4 species, namely H. spinulosa Neumann, 1906, H. muhsamae Santos Dias, 1954, H …

The Effects Of Heat-Killed Echinostomatid Parasites On Mice Treated With Dextran Sodium Sulfate (Dss), Natalie Gooder

All Graduate Theses, Dissertations, and Other Capstone Projects

Objective: Autoimmune diseases are chronic, incurable, and affect approximately 50 million Americans. This is a strong need for better ways to treat autoimmune diseases. Parasites and parasite proteins have been observed to protect mice from symptoms of induced colitis in mice treated with dextran sodium sulfate (DSS), a model for inflammatory bowel disease (IBD). I hypothesize that non-living echinostomatid parasites, given during DSS treatment, can decrease intestinal inflammation and weight loss, providing a possible novel treatment for IBD.

Methods: A range of DSS concentrations (0.5%-3%) were delivered to female C57BL/6 mice in their drinking water in order to determine the …

Endogenous Gene Tagging Of Pfr2 And Pfr5 In Trypanosoma Cruzi Using Crispr/Cas9, Naomi Bryant

All Master's Theses

The flagellum of Trypanosoma cruzi contains the paraflagellar rod (PFR) an extra-axonemal scaffolding. The PFR consists of a lattice of cytoskeletal filaments that lies alongside the (9 + 2) microtubular axoneme, beginning at the flagellar pocket and extending to the flagellar tip. The PFR has only been observed within the phylums Euglenozoa and Dinoflagellata, although many eukaryotic organisms with long flagella have extra-axonemal structures that accommodate enzymes and regulatory proteins along with serving as scaffolding. The exact function and basic molecular composition of the PFR has yet to be determined although the major structural components, PFR1 and PFR2 and several …

Multistate Survey Of American Dog Ticks (Dermacentor Variabilis) For Rickettsia Species, Joy A. Hecht, Michelle E.J. Allerdice, Elizabeth A. Dykstra, Laura Mastel, Rebecca J. Eisen, Tammi L. Johnson, Holly D. Gaff, Andrea S. Varela-Stokes, Jerome Goddard, Benedict B. Pagac, Christopher D. Paddock, Sandor E. Karpathy

Biological Sciences Faculty Publications

Dermacentor variabilis, a common human-biting tick found throughout the eastern half and along the west coast of the United States, is a vector of multiple bacterial pathogens. Historically, D. variabilis has been considered a primary vector of Rickettsia rickettsii, the causative agent of Rocky Mountain spotted fever. A total of 883 adult D. variabilis, collected between 2012 and 2017 from various locations in 12 states across the United States, were screened for rickettsial DNA. Tick extracts were evaluated using three real-time PCR assays; an R. rickettsii-specific assay, a Rickettsia bellii-specific assay, and a Rickettsia genus-specific …

Dynamics Of Two Pathogens In A Single Tick Population, Alexis White, Elsa Schaefer, Chelsea Wright-Thompson, Christopher M. Kribs, Holly Gaff

Biological Sciences Faculty Publications

A mathematical model for a two-pathogen, one-tick, one-host system is presented and explored. The goal of this model is to determine how long an invading pathogen persists within a tick population in which a resident pathogen is already established. The numerical simulations of the model demonstrate the parameter ranges that allow for coexistence of the two pathogens. Sensitivity analysis highlights the importance of vector-borne, tick-to-host, transmission rates on the invasion reproductive number and persistence of the pathogens over time. The model is then applied to a case study based on a reclaimed swampland field site in southeastern Virginia using field …

Parasitic Dinoflagellate Hematodinium Perezi Prevalence In Larval And Juvenile Blue Crabs Callinectes Sapidus From Coastal Bays Of Virginia, H. J. Small, J. P. Huchin-Mian, K. S. Reece, K. M. Pagenkopp Lohan, Mark J. Butler Iv, J. D. Shields

Biological Sciences Faculty Publications

The parasitic dinoflagellate Hematodinium perezi infects the American blue crab Callinectes sapidus and other decapods along the Eastern seaboard and Gulf of Mexico coast of the USA. Large juvenile and adult blue crabs experience high mortality during seasonal outbreaks of H. perezi, but less is known about its presence in the early life history stages of this host. We determined the prevalence of H. perezi in megalopae and early benthic juvenile crabs from multiple locations along the Virginia portion of the Delmarva Peninsula. The DNA of H. perezi was not detected in any megalopae collected from several locations within …

Trypanosoma Cruzi Trypomastigote Glycosylphosphatidylinositol-Anchored Mucins And A Synthetic Alpha-Gal-Containing Neoglycoprotein As Potential Biomarkers And Vaccines For Chagas Disease, Igor Leandro Estevao

Open Access Theses & Dissertations

Chagas disease (CD), caused by the protozoan Trypanosoma cruzi, is a neglected tropical disease that kills or permanently disable thousands of people annually. About 6-8 million people are estimated to be infected worldwide. Although many efforts have been made for the development of an effective immunotherapy, currently there is no vaccine to prevent or treat CD in humans. Despite their toxicity, the two current drugs for CD, benznidazole (BZN) and nifurtimox (NFX), have medium-to-high efficacy in the chronic stage of the disease and could save or improve the lives of thousands of patients. However, negative seroconversion in treated patients, as …

A Review Of Rat Lungworm Infection And Recent Data On Its Definitive Hosts In Hawaii, Chris N. Niebuhr, Susan I. Jarvi, Shane R. Siers

Human–Wildlife Interactions

Rat lungworm (Angiostrongylus cantonensis) is a zoonotic nematode that causes rat lungworm disease (angiostrongyliasis), a potentially debilitating form of meningitis, in humans worldwide. The definitive hosts for rat lungworm are primarily members of the genus Rattus, with gastropods as intermediate hosts. This parasite has emerged as an important public health concern in the United States, especially in Hawaii, where the number of human cases has increased in the last decade. Here we discuss the current knowledge of the rat lungworm, including information on the life cycle and host species, as well as updates on known infection levels. Three …

Novel Information On The Morphology, Phylogeny And Distribution Of Camallanid Mematodes From Marine And Freshwater Hosts In South Africa, Including The Description Of Camallanus Sodwanaensis N. Sp., Roman Svitin, Marliese Truter, Olena Kudlai, Nico J. Smit, Louis Du Preez

Harold W. Manter Laboratory of Parasitology: Library Materials

Four species of previously known nematodes from the family Camallanidae were found from different hosts in South Africa: Batrachocamallanus xenopodis from the frog Xenopus muelleri, Paracamallanus cyathopharynx, and Procamallanus pseudolaeviconchus from the catfish Clarias gariepinus and Spirocamallanus daleneae from the catfish Synodontis zambezensis. In the material collected from various marine fishes, several specimens of nematodes from the genus Camallanus clearly differed from all previously known species. Based on morphological differences these specimens are assigned to a new species, C. sodwanaensis. Molecular data of 18S and 28S rDNA and COI sequences are provided for the collected species …

Scaphanocephalus-Associated Dermatitis As The Basis For Black Spot Disease In Acanthuridae Of St. Kitts, West Indies, Michelle M. Dennis, Adrien Izquierdo, Anne Conan, Kelsey Johnson, Solenne Giardi, Paul Frye, Mark A. Freeman

Harold W. Manter Laboratory of Parasitology: Library Materials

Acanthurus spp. of St. Kitts and other Caribbean islands, including ocean surgeonfish A. bahianus, doctorfish A. chirurgus, and blue tang A. coeruleus, frequently show multifocal cutaneous pigmentation. Initial reports from the Leeward Antilles raised suspicion of a parasitic etiology. The aim of this study was to quantify the prevalence of the disease in St. Kitts’ Acanthuridae and describe its pathology and etiology. Visual surveys demonstrated consistently high adjusted mean prevalence at 3 shallow reefs in St. Kitts in 2017 (38.9%, 95% CI: 33.8−43.9) and 2018 (51.5%; 95% CI: 46.2−56.9). There were no differences in …

A New Species Of Gordius (Phylum Nematomorpha) From Terrestrial Habitats In North America, Christina Anaya, Andreas Schmidt-Rhaesa, Ben Hanelt, Matthew G. Bolek

Harold W. Manter Laboratory of Parasitology: Library Materials

Freshwater hairworms (class Gordiida) are members of the phylum Nematomorpha that use terrestrial arthropods as definitive hosts but reside as free-living adult worms in rivers, lakes, or streams. The genus Gordius consists of 90 described species, of which three species were described from freshwater habitats in North America. In this paper we describe a new species of Gordius from terrestrial habitats in Oklahoma, Texas, and Louisiana, United States. Oddly, each year hundreds of adult free-living worms appear after bouts of heavy rain on streets, sidewalks, and lawns during the winter season, when terrestrial arthropod hosts are not active. The new …

Distribution Extension Of Aspiculuris Americana Parasite Of Peromyscus Difficilis In Hidalgo, Mexico, Griselda Pulido-Flores, Scott Monks, Jorge Falcón-Ordaz

Harold W. Manter Laboratory of Parasitology: Faculty Publications

English: As a part of an ongoing project to inventory the helminth parasites of rodents in Mexico, 30 individuals of Aspiculuris americana were collected inhabiting the intestine from three specimens of the rock mouse Peromyscus difficilis, collected from Cerro Xihuingo, Municipality of Tepeapulco, Hidalgo State, Mexico. This species of nematode parasite different species of the genus Peromyscus (P. gossypinus, P. leucopus, P. maniculatus, and P. floridanus) distributed from Yukon Territory in Canada to Florida in the United States of America. This is the first report of Aspiculuris americana in a Mexican endemic rodent, widening …

The Prevotella Copri Complex Comprises Four Distinct Clades Underrepresented In Westernized Populations, Adrian Tett, Kun D. Huang, Francesco Asnicar, Hannah Fehlner-Peach, Edoardo Pasolli, Nicolai Karcher, Federica Armanini, Paolo Manghi, Kevin Bonham, Moreno Zolfo, Francesca De Filippis, Cara Magnabosco, Richard Bonneau, John Lusingu, John Amuasi, Karl Reinhard, Thomas Rattei, Fredrik Boulund, Lars Engstrand, Albert Zink, Maria Carmen Collado, Dan R. Littman, Daniel Eibach, Danilo Ercolini, Omar Rota-Stabelli, Curtis Huttenhower, Frank Maixner, Nicola Segata

Karl Reinhard Publications

Prevotella copri is a common human gut microbe that has been both positively and negatively associated with host health. In a cross-continent metaanalysis exploiting >6,500 metagenomes, we obtained >1,000 genomes and explored the genetic and population structure of P. copri. P. copri encompasses four distinct clades (>10% inter-clade genetic divergence) that we propose constitute the P. copri complex, and all clades were confirmed by isolate sequencing. These clades are nearly ubiquitous and co-present in non-Westernized populations. Genomic analysis showed substantial functional diversity in the complex with notable differences in carbohydrate metabolism, suggesting that multi-generational dietary modifications may be …

Imaging Coprolite Taphonomy And Preservation, Karl Reinhard, Morgana Camacho, Breyden Geyer, Samantha Hayek, Chase Horn, Kaitlin Otterson, Julia Russ

Karl Reinhard Publications

The impact of coprolite taphonomy on parasite remains and aDNA recovery has been recognized. In general, coprolites from sites protected by geologic features such as caves and rock shelters exhibit the best preservation. In contrast, coprolites from open sites can be badly affected by taphonomic processes as shown by analyses of parasite eggs. For eggs, the impact of mites and free living nematodes has been quantified. Mites are associated with poor pinworm egg preservation. In other studies, percolation of water through sediments has a negative impact on egg recovery. We note that dietary remains can also decompose at open sites. …