Immunology and Infectious Disease Commons^™

Prevalence Of Tick-Borne Pathogens In Small Mammals And White-Tailed Deer In Southeast Nebraska, Tim Hotaling

School of Veterinary and Biomedical Sciences: Dissertations, Theses, and Student Research

The prevalence of tick-borne diseases has been increasing in the United States for the past couple decades. Studies have been conducted throughout the US identifying tick-borne disease pathogens as well as their hosts and prevalence. Research was conducted in Nebraska to determine the presence of some tick-borne disease pathogens, their vectors, and their hosts, with emphasis made on Borrelia spp., Rickettsia rickettsii, and Ehrlichia chaffeensis.

Small rodents in southeast Nebraska were trapped and sampled at eight study sites using live capture traps. Captured rodents were assessed for active parasitism by ticks which were collected and placed in alcohol. …

Hymenolepis Folkertsi N. Sp. (Eucestoda: Hymenolepididae) In The Oldfield Mouse Peromyscus Polionotus (Wagner) (Rodentia: Cricetidae: Neotominae) From The Southeastern Nearctic With Comments On Tapeworm Faunal Diversity Among Deer Mice, Arseny A. Makarikov, Todd N. Nims, Kurt E. Galbreath, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

A previously unrecognized species of hymenolepidid cestode attributable to Hymenolepis is described based on specimens in Peromyscus polionotus, oldfield mouse, from Georgia, United States, near the southeastern coast of continental North America. Specimens of Hymenolepis folkertsi n. sp. differ from those attributed to most other species in the genus by having testes arranged in a triangle and a scolex with a prominent rostrum-like protrusion. The newly recognized species is further distinguished by the relative position and length of the cirrus sac, shape of seminal receptacle, and relative size of external seminal vesicle and seminal receptacle. Hymenolepidid cestodes have sporadically …

On The Helminth Fauna Of Small Mammals In Hustai National Park, Mongolia, Sumiya Ganzorig, Nyamsuren Batsaikhan, Katsuro Hagiwara, Scott Lyell Gardner, Kenji Baba, Buho Hoshino

Scott L. Gardner Publications

Introduction

The Hustai National Park is one of the special protected areas in Mongolia. The park is famous by the successful re-introduction of the wild horse (takhi), and its well-managed protection work. The park has a rich and diverse mammal fauna and flora. Of these, the takhi, and other large mammal species are objects of intensive research by the international researchers, but the parasitic helminth fauna in Hustai National Park is remained unknown. Species diversity of wildlife and its abundance, especially high density of both the prey and predators, might allow the presence of various parasitic and symbiotic organisms on …

Bolivian Ectoparasites: A New Species Of Laelapine Mite (Acari: Parasitiformes, Laelapidae) From The Rodent Neacomys Spinosus, Donald Gettinger, Scott Lyell Gardner

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Laelaps neacomydis n. sp. is described from the pelage of the rodent Neacomys spinosus collected in Bolivia. Collection records from northern Brazil, southeastern Peru, and central Bolivia indicate its wide distribution across Amazonas associated with rodents of the genus Neacomys. The formal taxonomic description and illustrations are derived from the adults (female and male). Two larger species of laelapine mites, Gigantolaelaps intermedius and L. boultoni, infest the same hosts at the same localities.

New And Known Species Of Litomosoides (Nematoda: Filarioidea): Important Adult And Larval Characters And Taxonomic Changes, Ricardo Guerrero, Coralie Martin, Scott Lyell Gardner, Odile Bain

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

During field surveys in Venezuela, Peru, and French Guiana, species of Litomosoides were recovered from bats and from a didelphid marsupial. Their morphology was studied, giving particular attention to the head and caudal papillae, the spicules (used to distinguish the carinii and sigmodontis groups of Litomosoides), and the microfilariae. Litomosoides wilsoni sp. n. from the short-tailed opossum Monodelphis emiliae is described from Peru; Litomosoides brasiliensis, Litomosoides chandleri, and Litomosoides guiterasi from bats are redescribed, and new hosts are recorded. For the first time, larval stages were recovered from bats (one male and one female fourth-stage larvae of …

Early Development Of Larval Taenia Polyacantha In Experimental Intermediate Hosts, Osamu Fujita, Yuzaburo Oku, Munehiro Okamoto, Hiroshi Sato, Hong Kean Ooi, Masao Kamiya, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

The early larval development and migration route of Taenia polyacantha were examined using oral inoculation of oncospheres into red-backed voles and Mongolian gerbils. The larvae were recovered in the wall of the small intestine and in the mesenteric lymph nodes by 5 days postinfection (PI) and from the peritoneal cavity after 6 days PI. These results suggest that the larval cestodes developed initially in the wall of the small intestine and the mesenteric lymph nodes, and later migrated to the peritoneal cavity. Although the development of the parasite was quite similar in the 2 host species, pathological changes were different. …

Polymorphism Of Eimerian Oocysts Can Be A Problem In Naturally Infected Hosts: An Example From Subterranean Rodents In Bolivia, Scott Lyell Gardner, Donald W. Duszynski

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Since 1986, 364 tuco-tucos (Ctenomys spp.) representing 7 species were collected from 16 major collecting areas representing at least 4 distinct ecological habitats in Bolivia, South America. All were examined for coccidia, and 125 (34%) had oocysts in their feces including 84 of 236 (36%) Ctenomys boliviensis from tropical palm/savanna habitats; 1 of 3 (33%) Ctenomys conoveri from a chaco thorn forest; 3 of 7 (33%) Ctenomys frater from medium altitude grass habitats; and 6 of 8 (75%) Ctenomys lewisi and 31 of 35 (88%) Ctenomys opimus from high altitude/puna habitats. None of 3 Ctenomys leucodon (high altitude/puna) or …

Coccidia (Apicomplexa: Eimeriidae) From The Subterranean Rodent Ctenomys Opimus Wagner (Ctenomyidae) From Bolivia, South America, Christine R. Lambert, Scott Lyell Gardner, Donald Duszynski

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Of 35 tuco-tucos (Ctenomys opimus) collected in Bolivia, South America, 31 (88%) had eimerian oocysts in their feces at the time they were examined. Eighteen (58%) of the 31 infected animals were concurrently infected with 2 or 3 eimerian species. Four species of Eimeria were recovered and are described as new species based on the characteristics of sporulated oocysts. Oocysts of Eimeria granifera n. sp. were ellipsoidal, 21.1 x 17.2 (15-26 x 11-20), [micro]m with sporocysts ovoidal, 11.3 x 7.1 (8-14 x 5-9), [micro]m. Oocysts of Eimeria montuosi n. sp. were spheroidal, 24.2 x 22.0 (21-28 x 18-25) …

Echinococcus Vogeli Rausch And Bernstein, 1972, From The Paca, Cuniculus Paca L. (Rodentia: Dayproctidae), In The Departamento De Santa Cruz, Bolivia, Scott Lyell Gardner, Robert L. Rausch, Otto Carlos Jordan Camacho

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Among approximately 2,000 mammals examined for helminths in various regions of Bolivia during 1983-1987, cysts of Echinococcus vogeli Rausch and Bernstein, 1972, were found in a single paca, Cuniculus paca L., collected at La Laguna, Departamento de Santa Cruz (lat. 16 [degrees] 36' W; long. 62 [degrees] 42' S). This record, the first from Bolivia, represents a considerable extension of the known geographic range of this species in South America. Upon analysis of the morphologic characteristics of the protoscoleces derived from the cysts, the sizes of rostellar hooks from the material from the paca were found to be well within …

Small Mammal Community Structure And Composition In The Cerrado Province Of Central Brazil, Michael A. Mares, Kristina A. Ernest, Donald D. Gettinger

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Community structure, macrohabitat selection, and patterns of species co-occur- rence were examined during a 14-month study of small mammals in the Cerrado Province of central Brazil. Data were collected from mark-recapture grids in brejo and gallery forest, and from live-trapping and specimen collection in all habitat types within cerrado (campo limpo, campo sujo, cerrado [s.s.], cerradão, brejo, valley-side wet campo, and gallery forest). Gallery forest supported the highest species richness, most complex vertical distribution of species, highest level of trophic diversity, and highest macroniche diversity. Degree of habitat selection varied widely. All habitat types supported both rodents and marsupials, although …

The Coccidian Parasites (Protozoa, Sporozoa) Of Rodents, Norman D. Levine, Virginia Ivens

Harold W. Manter Laboratory: Library Materials

This monograph summarizes the known information on taxonomy, morphology, life cycle, hosts, location in the host, pathogenicity, geographic distribution, and cross-transmission studies of the 196 named species of coccidia of rodents. These include 176 species of Eimeria, 9 of Isospora, 3 of Wenyonella, 2 each of Cryptosporidium and Klossiella, and 1 each of Dorisiella, Caryospora, Tyzzeria, and Klossia. In addition, similar data are given for those forms for which insufficient information is available to justify assigning them names.

Eimeria, which is the most common genus, has been described from only 15% …