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Articles 31 - 42 of 42
Full-Text Articles in Life Sciences
Global Warming Is Changing The Dynamics Of Arctic Host-Parasite Systems, S. J. Kutz, Eric P. Hoberg, L. Polley, E. J. Jenkins
Global Warming Is Changing The Dynamics Of Arctic Host-Parasite Systems, S. J. Kutz, Eric P. Hoberg, L. Polley, E. J. Jenkins
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Global climate change is altering the ecology of infectious agents and driving the emergence of disease in people, domestic animals, and wildlife. We present a novel, empirically based, predictive model for the impact of climate warming on development rates and availability of an important parasitic nematode of muskoxen in the Canadian Arctic, a region that is particularly vulnerable to climate change. Using this model, we show that warming in the Arctic may have already radically altered the transmission dynamics of this parasite, escalating infection pressure for muskoxen, and that this trend is expected to continue. This work establishes a foundation …
Trichinella Pseudospiralis From A Wild Pig In Texas, H. Ray Gamble, E. Pozio, J. Ralph Lichtenfels, D. S. Zarlenga, D. E. Hill
Trichinella Pseudospiralis From A Wild Pig In Texas, H. Ray Gamble, E. Pozio, J. Ralph Lichtenfels, D. S. Zarlenga, D. E. Hill
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
In December 2001, the routine inspection of a wild boar intended for human consumption revealed the presence of Trichinella ssp. larvae. Biological, morphological and genetic analyses demonstrated the parasite to be Trichinella pseudospiralis. This is the second report of T. pseudospiralis in the United States and the first report of the parasite in a food animal species in the U.S.
Caudal Polymorphism And Cephalic Morphology Among First-Stage Larvae Of Parelaphostrongylus Odocoilei (Protostrongylidae: Elaphostrongylinae) In Dall’S Sheep From The Mackenzie Mountains, Canada, Eric P. Hoberg, Emily J. Jenkins, Benjamin Rosenthal, Mayee Wong, Eric F. Erbe, Susan J. Kutz, Lydden Polley
Caudal Polymorphism And Cephalic Morphology Among First-Stage Larvae Of Parelaphostrongylus Odocoilei (Protostrongylidae: Elaphostrongylinae) In Dall’S Sheep From The Mackenzie Mountains, Canada, Eric P. Hoberg, Emily J. Jenkins, Benjamin Rosenthal, Mayee Wong, Eric F. Erbe, Susan J. Kutz, Lydden Polley
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
We demonstrate polymorphism in the structure of the tail among first-stage larvae of Parelaphostrongylus odocoilei (Protostrongylidae). Two distinct larvae, both with a characteristic dorsal spine, include (1) a morphotype with a kinked conical tail marked by three distinct transverse folds or joints and a symmetrical terminal tail spike and (2) a morphotype with a digitate terminal region lacking folds or joints and with an asymmetrical, subterminal tail spike. These divergent larval forms had been postulated as perhaps representing distinct species of elaphostrongyline nematodes. Application of a multilocus approach using ITS-2 sequences from the nuclear genome and COX-II sequences from the …
Laelapine Mites (Acari: Laelapidae) Associated With Small Mammals From Amazonas, Brazil, Including A New Species From Marsupials, Donald Gettinger, Fernanda Martins-Hetano, Marcela Lareschi, Jay R. Malcolm
Laelapine Mites (Acari: Laelapidae) Associated With Small Mammals From Amazonas, Brazil, Including A New Species From Marsupials, Donald Gettinger, Fernanda Martins-Hetano, Marcela Lareschi, Jay R. Malcolm
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
An intensive survey of ectoparasitic arthropods associated with small mammals in upland forests near Manaus, Brazil, provides information on the taxonomy and host distribution of laelapine mites in the Amazonian Region. We identified 5 genera and 21 species of these mites by comparisonw ith representativem useum specimens, the taxonomic literature, and, when possible, the original type specimens. These mites are host specific, with associations ranging from strict monoxeny (18 species) to oligoxeny (1 species) and pleioxeny (2 species). Marsupials were infested with species of Androlaelaps, echimyid rodents with Tur, and sigmodontine rodents with Gigantolaelaps, Laelaps, and Mysolaelaps. Androlaelaps bergalloi …
Faunal Survey Of Streblid Flies (Diptera: Streblidae) Associated With Bats In Paraguay, Carl W. Dick, Donald Gettinger
Faunal Survey Of Streblid Flies (Diptera: Streblidae) Associated With Bats In Paraguay, Carl W. Dick, Donald Gettinger
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
An extensive survey of the ectoparasites infesting bats in Paraguay provides information regarding the taxonomy and host distribution of streblid bat flies at a geographic interface between subtropical and temperate habitats. Five families of bats representing 45 species, including Molossidae (5 genera and 15 species), Natalidae (1 genus and 1 species), Phyllostomidae (11 genera and 15 species), Noctilionidae (1 genus and 2 species), and Vespertilionidae (4 genera and 12 species) were collected from 24 localities across Paraguay and sampled for ectoparasites. In total, 2,467 bat flies were collected, representing 11 genera and 31 nominal species of Streblidae, of which 6 …
Hesperoctenes Fumarius (Hemiptera: Polyctenidae) Infesting Molossus Rufus (Chiroptera: Molossidae) In Southeastern Brazil, Carlos E. L. Esbérard, Andrea C. Jesus, Adarene G. Motta, Helena G. Bergallo, Donald Gettinger
Hesperoctenes Fumarius (Hemiptera: Polyctenidae) Infesting Molossus Rufus (Chiroptera: Molossidae) In Southeastern Brazil, Carlos E. L. Esbérard, Andrea C. Jesus, Adarene G. Motta, Helena G. Bergallo, Donald Gettinger
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
We analyzed the prevalence. intensity. and medium density of parasitism of Hesperoctenes fumarius infesting Molossus rufus in natural (hollow trees) and anthropogenic roosts (attics) in southeastern Brazil. The prevalence and intensity of infestations were higher in the hollow trees than in the attic roosts. We also noted a relationship between the amount of space available within the roost and the infestation levels of H. fumarius. One advantage of roosting in larger. often manmade. refuges may be the reduction in ectoparasite infestations.
A New Species Of Skrjabingylus Petrov, 1927 (Nematoda: Metastrongyloidea) From The Frontal Sinuses Of The Hooded Skunk, Mephitis Macroura (Mustelidae), Ramon A. Carreno, Kathryn E. Reif, Steven A. Nadler
A New Species Of Skrjabingylus Petrov, 1927 (Nematoda: Metastrongyloidea) From The Frontal Sinuses Of The Hooded Skunk, Mephitis Macroura (Mustelidae), Ramon A. Carreno, Kathryn E. Reif, Steven A. Nadler
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Skrjabingylus santaceciliae n. sp. is described based on specimens from the frontal sinuses of a hooded skunk, Mephitis macroura, collected from the Area de Conservación Guanacaste, Costa Rica. Skrjabingylus santaceciliae n. sp. differs from the other 5 species in the genus in having pointed spicule tips that lack a rounded or lobed formation and by lacking a prominent distal projection at the tail tip. Morphometric comparisons show that S. santaceciliae n. sp. is much smaller than the only other valid species from Mephitis, Skrjabingylus chitwoodorum Hill, 1939. Likewise, morphometric comparisons also distinguish S. santaceciliae n. sp. from other described Skrjabingylus …
Systematics Of Mesocestoides (Cestoda: Mesocestoididae): Evaluation Of Molecular And Morphological Variation Among Isolates, Kerry A. Padgett, Steven A. Nadler, Linda Munson, Ben Sacks, Walter M. Boyce
Systematics Of Mesocestoides (Cestoda: Mesocestoididae): Evaluation Of Molecular And Morphological Variation Among Isolates, Kerry A. Padgett, Steven A. Nadler, Linda Munson, Ben Sacks, Walter M. Boyce
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
A hypothesis-based framework was used to test if 3 genetic strains of Mesocestoides (clades A, B, and C) are distinct evolutionary lineages, thereby supporting their delimitation as species. For comparative purposes, 3 established cestode species, Taenia pisiformis, Taenia serialis, and Taenia crassiceps were assessed using the same methods. Sequence data from mitochondrial rDNA (12S) and the second internal transcribed spacer of nuclear rDNA (ITS-2) revealed derived (autapomorphic) characters for lineages representing clade A (n = 6 autapomorphies), clade B (n = 4), and clade C (n = 9) as well as T. pisiformis (n = 15) and T. serialis …
Pseudostertagia Bullosa (Nematoda: Trichostrongyloidea) In Artiodactyl Hosts From North America: Redescription And Comments On Systematics, Eric P. Hoberg, A. Abrams
Pseudostertagia Bullosa (Nematoda: Trichostrongyloidea) In Artiodactyl Hosts From North America: Redescription And Comments On Systematics, Eric P. Hoberg, A. Abrams
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
A relationship for Pseudostertagia bullosa within the trichostrongyloids has been enigmatic or unresolved. Studies of the synlophe in males and females of P. bullosa revealed a tapering system anterior to the deirids and a pattern of parallel ridges extending to near the caudal extremity in both lateral and median fields. Structurally, the synlophe differs considerably from that seen among the Cooperiinae and exhibits homoplasy with respect to ridge systems among some Ostertagiinae. Other structural characters due to symplesiomorphy, homoplasy or because they represent autapomorphies do not serve to reveal the putative relationships for P. bullosa with other trichostrongyloids. Although somewhat …
Molecular Phylogenetics And Diagnosis Of Anisakis, Pseudoterranova, And Contracaecum From Northern Pacific Marine Mammals, Steven A. Nadler, Stefano D'Amelio, Murray D. Dailey, Lia Paggi, Sandra Siu, Jusy A. Sakanari
Molecular Phylogenetics And Diagnosis Of Anisakis, Pseudoterranova, And Contracaecum From Northern Pacific Marine Mammals, Steven A. Nadler, Stefano D'Amelio, Murray D. Dailey, Lia Paggi, Sandra Siu, Jusy A. Sakanari
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Individual specimens of Anisakis, Pseudoterranova, and Contracaecum collected from marine mammals inhabiting northern Pacific waters were used for comparative diagnostic and molecular phylogenetic analyses. Forty-eight new sequences were obtained for this study of 14 Anisakis taxa, 8 Pseudoterranova taxa, 4 Contracaecum taxa, and 4 outgroup species. Partial 28S (LSU) and complete internal transcribed spacer (ITS-1, 5.8S, ITS-2) ribosomal DNA was amplified by the polymerase chain reaction and sequenced. Sequences of ITS indicated that Pseudoterranova specimens from Zalophus californianus (California sea lion), Mirounga angustirostris (northern elephant seal), Phoca vitulina (harbor seal), Enhydra lutris (sea otter), and Eumetopias jubatus (Steller’s …
Possible Recent Range Expansion Of Alcataenia Longicervica (Eucestoda: Dilepididae) Parasitic In Murres Uria Spp. (Alcidae) Into The North Atlantic [Short Communications], Sabir B. Muzaffar, Eric P. Hoberg, Ian L. Jones
Possible Recent Range Expansion Of Alcataenia Longicervica (Eucestoda: Dilepididae) Parasitic In Murres Uria Spp. (Alcidae) Into The North Atlantic [Short Communications], Sabir B. Muzaffar, Eric P. Hoberg, Ian L. Jones
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
A wide range of helminths has been recorded from murres Uria spp. (Threlfall 1971, reviewed by Hoberg 1984a, Muzaffar & Jones 2004). Of the cyclophyllidean cestodes that parasitize murres, the genus Alcataenia Spasskaya 1971 (Dilepididae) is represented by ten species, eight of which are restricted and specific to the auks; the other two species occur in gulls (Laridae). The intermediate hosts of Alcataenia are euphausiid crustaceans such as species of Thysanoessa (Shimazu 1975), which also form an important dietary component of breeding and wintering murres, particularly Thick-billed Murres Uria lomvia (Gaston & Noble 1985, Birkhead & Nettleship 1987, Elliot et …
Development And Pathogenesis Of Parelaphostrongylus Odocoilei (Nematoda: Protostrongylidae) In Experimentally Infected Thinhorn Sheep (Ovis Dalli), Emily J. Jenkins, Eric P. Hoberg, L. Polley
Development And Pathogenesis Of Parelaphostrongylus Odocoilei (Nematoda: Protostrongylidae) In Experimentally Infected Thinhorn Sheep (Ovis Dalli), Emily J. Jenkins, Eric P. Hoberg, L. Polley
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Recently, the protostrongylid nematode Parelaphostrongylus odocoilei has been reported in a new host species, thinhorn sheep (Ovis dalli). For the first time, we completed the life cycle of P. odocoilei in three Stone’s sheep (O. dalli stonei) and two thinhorn hybrids (O. dalli stonei × O. dalli dalli), each infected with 200 third-stage larvae from slugs (Deroceras laeve). The prepatent period ranged from 68 days to 74 days, and shedding of first-stage larvae (L1) peaked at >10,000 L1 per gram of feces between 90 and 110 days postinfection. A total of 75, …