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2001

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Articles 2371 - 2400 of 2476

Full-Text Articles in Life Sciences

Amplification Of The Fusion Gene Of Rinderpest Virus By Polymerase Chain Reaction And Cloning In Bacteria, Hakan Bulut, Mehmet Zi̇ya Doymaz, Yusuf Bolat Jan 2001

Amplification Of The Fusion Gene Of Rinderpest Virus By Polymerase Chain Reaction And Cloning In Bacteria, Hakan Bulut, Mehmet Zi̇ya Doymaz, Yusuf Bolat

Turkish Journal of Veterinary & Animal Sciences

In this study, amplification of the rinderpest virus (RPV) fusion (F) gene with polymerase chain reaction (PCR) and cloning of the F gene in Escherichia coli were reported. For this purpose, first total mRNA from Vero cells infected with vaccine strain of RPV was obtained and then cDNA from this mRNA preparation was acquired with reverse transcription. In PCR, cDNA from infected Vero cells and F gene specific primers were used and the F gene was amplified. Both the PCR product and the cloning vector pUC19 were cut with EcoRI and HindIII restriction enzymes. By using T4 DNA ligase, insert …

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Serum Vitamin C Levels In Goats With Peste Des Petits Ruminants (Ppr), Mustafa İssi̇, Yusuf Gül, Murat Dabak Jan 2001

Serum Vitamin C Levels In Goats With Peste Des Petits Ruminants (Ppr), Mustafa İssi̇, Yusuf Gül, Murat Dabak

Turkish Journal of Veterinary & Animal Sciences

The role of vitamin C in the medical treatment of Peste des Petits Ruminants (PPR) was investigated by measuring the serum vitamin C levels in goats with PPR. Fifteen goats 5-6 months old with PPR (sick group) and 15 healthy goats 9-10 months old (control group) were used. All the animals used in the study were systematically and clinically examined and blood samples were obtained for white blood cell counts and serum vitamin C levels. The white blood cell counts were detected using Thoma microslides. Serum vitamin C levels were measured by the phosphotungstic acid method with Schimadzu UV-1208, UV-VIS …

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Changes In The Size Distribution Of Steroidogenic And Non-Steroidogenic Bovine Luteal Cells During The Oestrus Cycle, Arzu Yi̇ği̇t, Şevket Arikan Jan 2001

Changes In The Size Distribution Of Steroidogenic And Non-Steroidogenic Bovine Luteal Cells During The Oestrus Cycle, Arzu Yi̇ği̇t, Şevket Arikan

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was to investigate the size distribution of steroidogenic and non-steroidogenic luteal cells throughout the oestrus cycle. Twelve corpora lutea collected from different stages of the oestrus cycle were used. Corpora lutea collected from nonpregnant cows were dissociated into single-cell suspensions by enzyme treatments. Cells were stained for 3\beta-hydroxysteroid dehydrogenase (3\beta-HSD) activity, a marker for steroidogenic cells. The sizes of 3b-HSD positive (steroidogenic) and negative cells (nonsteroidogenic) were measured with an ocular micrometer. Very small cells (

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The Serological And Virological Investigations And Pathogenesis Of Bvdv Infection In Sheep During Pre- And Post-Partum Periods, İbrahi̇m Burgu, Yilmaz Akça, Feray Alkan, Aykut Özkul, Taner Karaoğlu, Seval Bi̇lge Dağalp, Tuba Çi̇ğdem Oğuzoğlu, Kadi̇r Yeşi̇lbağ Jan 2001

The Serological And Virological Investigations And Pathogenesis Of Bvdv Infection In Sheep During Pre- And Post-Partum Periods, İbrahi̇m Burgu, Yilmaz Akça, Feray Alkan, Aykut Özkul, Taner Karaoğlu, Seval Bi̇lge Dağalp, Tuba Çi̇ğdem Oğuzoğlu, Kadi̇r Yeşi̇lbağ

Turkish Journal of Veterinary & Animal Sciences

In this research, the pathogenesis and presence of transplacental pestivirus infection were investigated in different flocks. For this purpose, a total of 661 pregnant ewes and 29 rams were used. 174 of 661 pregnant ewes were sampled twice in the second or the third month of gestation and as well as on the day of gestation, whereas 487 of them were sampled only on the day of delivery. In addition, precolostral blood samples of 770 lambs born from those pregnants ewes, 109 of which delivered twins, were also withdrawn. Pestivirus was not detected in the blood samples tested. However, in …

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Kidney Diseases And Antioxidative Metabolism In Dogs, Funda Kargin, Ulvi̇ Reha Fi̇danci Jan 2001

Kidney Diseases And Antioxidative Metabolism In Dogs, Funda Kargin, Ulvi̇ Reha Fi̇danci

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was to investigate the role of free radicals and to show the changes in the antioxidative metabolism of dogs with renal diseases. For this purpose, the plasma malonlydialdehyde levels, activities of the GSH-Px, SOD and CAT in hemolysates of the red cells, and serum and plasma levels of the \beta-carotene and ascorbic acid were analysed to determine their relationships. A total of 35 dogs aged between 3 and 5 years were used. Twenty healthy dogs with no clinical signs comprised the as control group. Clinically, fifteen dogs exhibited kidney disorders and this diagnosis was supported …

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Genetic Determinants Of Industrially Important Characters In Lactococci, Mustafa Akçeli̇k, Pinar Şanlibaba, Çağla Tükel, Yasi̇n Tuncer Jan 2001

Genetic Determinants Of Industrially Important Characters In Lactococci, Mustafa Akçeli̇k, Pinar Şanlibaba, Çağla Tükel, Yasi̇n Tuncer

Turkish Journal of Veterinary & Animal Sciences

Genetic determinants of lactose fermentation, proteolytic activity and bacteriocin production in the strains L. lactis subsp. lactis MPL114, L. lactis subsp. cremoris MPC112 and L. lactis subsp. lactis biovar. diacetylactis MPD166 were studied. As a result of mutation and genetic transfer studies, it was determined that all of these characters were encoded by the 65.4 kb plasmid in L. lactis subsp. cremoris MPC112. Lactose fermentation and proteolytic activity were encoded by the 68.0 kb plasmid and bacteriocin production was encoded by the 12.4 kb plasmid in L. lactis subsp. lactis MPL114. Lactose fermentation, proteolytic activity and bacteriocin production in L. …

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Antiinflammatory And Antipyretic Activity Of Polygonum Lapathifolium In Rats, Oya Keleş, Tülay Bakirel, Süleyman Şener, Handan Aydin, Keri̇m Alpinar Jan 2001

Antiinflammatory And Antipyretic Activity Of Polygonum Lapathifolium In Rats, Oya Keleş, Tülay Bakirel, Süleyman Şener, Handan Aydin, Keri̇m Alpinar

Turkish Journal of Veterinary & Animal Sciences

This study was conducted to evaluate the pharmacologic effects of Polygonum lapathifolium L. (Polygonaceae), growing naturally in Turkey. The antiinflammatory activity of the ethanol extract of the root and rhizome of P. lapathifolium was evaluated using carrageenan-induced paw edema in rats. Intraperitoneal pretreatment with extract at doses ranging from 100 to 500 mg/kg significantly inhibited the acute phase of this experimental model of the inflammatory process in a dose-dependent manner. At maximal dose (500 mg/kg), it exhibited a significantly higher action when compared with those of other doses and was found to be 1.08 times as active as indomethacin. The …

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Pharmacokinetics And Tissue Levels Of Tilmicosin In Fowls, Oya Keleş, Tülay Bakirel, Süleyman Şener, Gül Baktir, Gürdal Dağoğlu, Oktay Özkan Jan 2001

Pharmacokinetics And Tissue Levels Of Tilmicosin In Fowls, Oya Keleş, Tülay Bakirel, Süleyman Şener, Gül Baktir, Gürdal Dağoğlu, Oktay Özkan

Turkish Journal of Veterinary & Animal Sciences

Tilmicosin is a long-acting macrolide antibiotic used in the treatment of respiratory disease. It was administered once (50 mg/kg b.wt) to fowls via the oral route for determination of kinetic properties and tissue levels. After oral administration, tilmicosin's pharmacokinetics conformed to a two compartment open model. Tilmicosin was slowly eliminated from the serum and lung with mean half-lives of 30.18 ± 2.38 and 75.74 ± 3.67 hours, respectively. The mean maximum concentration of the drug in the lungs was found to be 6.2 times greater that of serum. Serum and lung tilmicosin concentrations reached peak values 4.66 ± 2 and …

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Quantitative Estimation Of Ddt By Glc In Different Strains Of Musca Domestica L. By Using Hexane As Well As Diethyl Ether, Kahkashan Akhtar, Syed Naim-Ul-Hasan Naqvi Jan 2001

Quantitative Estimation Of Ddt By Glc In Different Strains Of Musca Domestica L. By Using Hexane As Well As Diethyl Ether, Kahkashan Akhtar, Syed Naim-Ul-Hasan Naqvi

Turkish Journal of Zoology

Estimation of DDT by GLC (gas liquid chromatography) in the PCSIR strain of Musca domestica L. Shows that 59.69 ng/fly DDT was found in the sample extracted with hexane and 55.74 ng/fly in the sample extracted with diethyl ether after treatment with 2.0 ug/fly. In the Holland strain, 18.3 ng/fly DDT was found in the sample extracted with hexane and 17.1 ng/fly in the sample extracted with diethyl ether. In the Malir strain 4.35 ng/fly DDT was found in the sample extracted with hexane and 1.29 ng/fly in the sample extracted with diethyl ether.

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Histological Investigations On The Neurosecretory Cells In Thoracic And Abdominal Ganglia Of Melanogryllus Desertus (Pallas, 1771) (Orthoptera; Gryllidae), Esen M. Aydemi̇r, Gürsel Ergen Jan 2001

Histological Investigations On The Neurosecretory Cells In Thoracic And Abdominal Ganglia Of Melanogryllus Desertus (Pallas, 1771) (Orthoptera; Gryllidae), Esen M. Aydemi̇r, Gürsel Ergen

Turkish Journal of Zoology

In this study, three kinds of neurosecretory cells, which are called A, B and C-types, have been described in the thoracic and abdominal ganglia of adult Melanogryllus desertus (PALLAS, 1771), (Orthoptera; Gryllidae) by using paraldehyde fuchsine and azan staining methods at the light microscope level.

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The Cladoceran And Copepod (Crustacea) Fauna Of İkizgöl (Bornova-İzmir), Mustafa Ruşen Ustaoğlu, Süleyman Balik, Cem Aygen, Di̇dem Özdemi̇r Mi̇s Jan 2001

The Cladoceran And Copepod (Crustacea) Fauna Of İkizgöl (Bornova-İzmir), Mustafa Ruşen Ustaoğlu, Süleyman Balik, Cem Aygen, Di̇dem Özdemi̇r Mi̇s

Turkish Journal of Zoology

With the aim of identifying cladoceran and copepod fauna of İkizgöl, which is situated 565 m above sea level on the southern slope of Yamanlar Mountain, plankton samples were collected monthly by plankton net horizontally and vertically, with a mesh size of 55µm between December 1994 and May 1996. Collected specimens were preserved in 4% formaldehyde. As a result, a total of 16 (12 cladoceran and 4 copepods) species were identified from İkizgöl.

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Some Biological Characteristics Of Silurus Triostegus Heckel, 1843 From Atatürk Dam Lake (Turkey), Seyi̇t Ahmet Oymak, Kemal Solak, Erhan Ünlü Jan 2001

Some Biological Characteristics Of Silurus Triostegus Heckel, 1843 From Atatürk Dam Lake (Turkey), Seyi̇t Ahmet Oymak, Kemal Solak, Erhan Ünlü

Turkish Journal of Zoology

In this study, some biological characteristics such as age and sex composition, growth in length and weight, age-length, age-weight and length-weight relationships, condition factor spawning time, age of sexual maturity, and fecundity of Silurus triostegus in Atatürk Dam lake were investigated. The percentage of females was 48.3% and that of males 57.7% out of 623 specimens belonging to age groups I-XI. Isometric growth patterns were proved from the length-weight relationships. It was estimated that the females had higher Lo (202.85 cm) and lower low K (0.046871) values than males (Lo 113.98 cm and K = 0.101972). Mean condition factors of …

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New Localities Extend The Range Of Rana Bedriagae Caralitana Arıkan, 1988 (Anura: Ranidae) Further West And Suggest Specific Status, Tarek Jdeidi, C. Can Bi̇lgi̇n, Meral Kence Jan 2001

New Localities Extend The Range Of Rana Bedriagae Caralitana Arıkan, 1988 (Anura: Ranidae) Further West And Suggest Specific Status, Tarek Jdeidi, C. Can Bi̇lgi̇n, Meral Kence

Turkish Journal of Zoology

Multivariate morphometric analyses revealed that the range of Rana bedriagae caralitana extends further west to include Çardak in Denizli (western Turkey). The presence of the forms caralitana and nominate bedriagae syntopically may indicate species status for the former.

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On The Occurrence Of Niphargus Valachicus Dobreanu & Manolache, 1933 (Amphipoda, Gammaridae) In The Western Black Sea Region Of Turkey, Mehmet Akbulut, Murat Sezgi̇n, Mehmet Çulha, Levent Bat Jan 2001

On The Occurrence Of Niphargus Valachicus Dobreanu & Manolache, 1933 (Amphipoda, Gammaridae) In The Western Black Sea Region Of Turkey, Mehmet Akbulut, Murat Sezgi̇n, Mehmet Çulha, Levent Bat

Turkish Journal of Zoology

In this study, the characteristic features, distribution and ecology of the amphipod Niphargus valachicus E. Dobreanu & C. Manolache, 1933 sampled at Sırakaraağaçlar Stream of Sinop, flowing into the Black Sea, are given. Four taxa of Niphargus genus, freshwater Amphipoda fauna have been identified in Turkey. In addition to these, Niphargus valachicus is a new record for the Turkish freshwater fauna.

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Uloborus Walckenaerius Latreille 1806 (Araneae, Uloboridae), A Spider New To Turkish Fauna, Abdullah Bayram, M. Ali̇ Göven Jan 2001

Uloborus Walckenaerius Latreille 1806 (Araneae, Uloboridae), A Spider New To Turkish Fauna, Abdullah Bayram, M. Ali̇ Göven

Turkish Journal of Zoology

The morphological characteristics of Uloborus walckenaerius Latreille, 1806, which is recorded for the first time in Turkey, are given in this study.

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Systematical Studies On The Genus Bracon (Glabrobracon) (Hymenoptera, Braconidae: Braconinae) In Ankara Province, Yasemi̇n Güler, Neşe Çağatay Jan 2001

Systematical Studies On The Genus Bracon (Glabrobracon) (Hymenoptera, Braconidae: Braconinae) In Ankara Province, Yasemi̇n Güler, Neşe Çağatay

Turkish Journal of Zoology

The present study includes the species Bracon (Glabrobracon ) osculator Nees, B. (G.) lividus Telenga, B. (G.) planinotus Tobias, B. (G.) tschitcherini Kokoujev, B. (G.) helleni Telenga, B. (G.) piger Wesmael, B. (G.) variator Nees from the genus Bracon Fabricius (Hymenoptera, Braconidae: Braconinae). Morphological descriptions and its general distribution and distribution in Turkey are given. Bracon (G.) planinotus Tobias and B. (G.) helleni Telenga were found to be new records for Turkish fauna.

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A Study On The Heteroptera Fauna Of Bozcaada (Çanakkale Province), Özlem Özsaraç, Suat Kiyak Jan 2001

A Study On The Heteroptera Fauna Of Bozcaada (Çanakkale Province), Özlem Özsaraç, Suat Kiyak

Turkish Journal of Zoology

Ecological and faunistic information on 385 Heteropteran specimens, belonging to 38 species of 30 genera of 9 families, collected from Bozcaada, between May and September 1996, is given. Thirty-six of these 38 species are new records for the fauna of Bozcaada.

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Germination, Emergence, And Early Growth Of Spartina Pectinata, Wade Herold Williams Jan 2001

Germination, Emergence, And Early Growth Of Spartina Pectinata, Wade Herold Williams

Dissertations and Theses @ UNI

Spartina pectinata Link is frequently omitted from lowland prairie restorations because the seed often fails to grow when planted, and inclusion is limited to plugs of young plants. Anecdotal reports indicated improvement of seed germination following stratification. The effects of seed stratification on the germination of S. pectinata seed were systematically studied. Seed was obtained from both relict populations of plants and germplasm plants as defined by Englert and White (1977). Seed from 5 different collections were subjected to 4 different seed stratifying treatments: imbibed-chilled (1 oc for 15 to 45 days); imbibed-frozen (-12°C for 4 to 7 days); or …

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Preliminary Evaluation Of A Guideline Classification System, Elmer Bernstam, Nachman Ash, Mor Peleg, Samson Tu, Edward H. Shortliffe, Robert A. Greenes Jan 2001

Preliminary Evaluation Of A Guideline Classification System, Elmer Bernstam, Nachman Ash, Mor Peleg, Samson Tu, Edward H. Shortliffe, Robert A. Greenes

Faculty, Staff and Student Publications

In a previous paper, we presented a proposed expansion of the National Guideline Clearing-house (NGC) classification1. We performed a preliminary evaluation of the classification based on 100 guidelines randomly selected from the NGC collection. We found that 89 of the 100 guidelines could be assigned to a single guideline category. To test inter-observer agreement, twenty guidelines were also categorized by a second investigator. Agreement was found to be 40-90% depending on the axis, which compares favorably with agreement among MeSH indexers (30-60%)2. We conclude that categorization is feasible. Further research is needed to clarify axes with poor inter-observer agreement.

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Cultivar-Dependent Expression Of A Maize Lipoxygenase Responsive To Seed Infesting Fungi, Richard A. Wilson, Harold W. Gardner, Nancy P. Keller Jan 2001

Cultivar-Dependent Expression Of A Maize Lipoxygenase Responsive To Seed Infesting Fungi, Richard A. Wilson, Harold W. Gardner, Nancy P. Keller

Fungal Molecular Plant-Microbe Interactions

Maize kernels are highly susceptible to Aspergillus spp. infection and aflatoxin (AF) contamination. Fatty acid signaling molecules appear to mediate the plant–fungal interaction by affecting the growth, development, and AF production of the fungus. In particular, fatty acid derivatives of the plant lipoxygenase (LOX) pathway are implicated in the Aspergillus spp.-seed interaction. The 9(S)-hydroperoxide derivative of linoleic acid promotes transcription of AF genes, whereas the 13(S)-hydroperoxide derivative decreases AF gene expression and production; both are sporulation factors. Our goal was to identify LOX genes responsive to Aspergillus spp. colonization and determine their specificities, 9(S)- …

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Managing Minnesota's Recovered Wolves, L. David Mech Jan 2001

Managing Minnesota's Recovered Wolves, L. David Mech

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

The Minnesota wolf (Canis lupus) population was estimated by the Minnesota Department of Natural Resources at 2,450 during winter 1997-1998 and had increased at an average annual rate of 4.5°% since winter 1988-1989. The population may be removed from the federal endangered species list by 2002, and management would then return to the state. A federal recovery team recommended a population goal of 1,250-1,400 wolves for Minnesota, with none in the agricultural region. A plan approved by the Minnesota legislature, however, continues the protection of wolves, except for pet and livestock depredation control, for at least 5 years …

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Polyacrylamide For Surface Irrigation To Increase Nutrient-Use Efficiency And Protectwater Quality, Rodrick D. Lentz, Robert E. Sojka, Charles W. Robbins, Dennis C. Kincaid, Dale T. Westermann Jan 2001

Polyacrylamide For Surface Irrigation To Increase Nutrient-Use Efficiency And Protectwater Quality, Rodrick D. Lentz, Robert E. Sojka, Charles W. Robbins, Dennis C. Kincaid, Dale T. Westermann

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Furrow irrigation systems have a greater application capacity, are less costly, and use less energy than sprinkler systems but furrow irrigation produces greater runoff, erosion, and deep percolation losses. Phosphorus (P) and nitrogen (N) losses are associated with runoff sediment, and can be minimized by eliminating irrigationinduced erosion. Excessive leaching of inorganic and organic solutes commonly occurs at the inflow region of furrow irrigated fields where infiltration opportunity times are longer. In one conservation practice, a high molecular weight, anionic polyacrylamide (PAM) is applied to advancing furrow stream flows at a concentration of 10 mg L-1. Because PAM …

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Human Herpesvirus 8 Can Be Transmitted Through Blood In Drug Addicts, Carlos Sosa, Jorge Benetucci, Colleen Hanna, Laura Sieczkowski, Gabriel Deluchi, Ana Maria Canizal, Hamakwa Mantina, Winslow Klaskala, Marianna Baum, Charles Wood Jan 2001

Human Herpesvirus 8 Can Be Transmitted Through Blood In Drug Addicts, Carlos Sosa, Jorge Benetucci, Colleen Hanna, Laura Sieczkowski, Gabriel Deluchi, Ana Maria Canizal, Hamakwa Mantina, Winslow Klaskala, Marianna Baum, Charles Wood

Nebraska Center for Virology: Faculty Publications

Human Herpes virus type-8 (HHV-8) seroprevalence was studied in a population of HIV positive intravenous drug users (IVDUs) from Argentina. Analysis of this population also indirectly made it possible to study HHV-8 blood transmission, because these individuals frequently engage in needle sharing behavior and are capable of acquiring a broad array of blood borne pathogens, including Hepatitis B/C virus. The seroprevalence of HHV-8 in IVDUs was compared to a group of non-IVDUs and HIV negative individuals. Of the 223 individuals tested, 13.45% were HHV-8 positive, 16.99% in the IVDUs group, and 5.71% in the non-IVDUs. Among HIV positive IVDUs, 25/144 …

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Gastrointestinal Strongyles In Wild Ruminants, Eric P. Hoberg, A. Alan Kocan, Lora G. Rickard Jan 2001

Gastrointestinal Strongyles In Wild Ruminants, Eric P. Hoberg, A. Alan Kocan, Lora G. Rickard

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Parasitologists have long studied helminth infections in wildlife species and have documented the existence of many organisms from a diversity of mammalian hosts. With this accumulation of information has come improved understanding of the significance of these organisms and the diseases they produce in their mammalian hosts. Some of the most notable examples include the metastrongyloid lungworms, Trichinella spiralis, and Elaeophora schneideri, which are covered separately in this volume. It is, however, for the group of parasites referred to as gastrointestinal nematodes that we have accumulated the most data. Only recently has progress been made in determining the …

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Umingmakstrongylus Pallikuukensis (Nematoda: Protostrongylidae) In Gastropods: Larval Morphology, Morphometrics, And Development Rates, Susan J. Kutz, Eric P. Hoberg, Lydden Polley Jan 2001

Umingmakstrongylus Pallikuukensis (Nematoda: Protostrongylidae) In Gastropods: Larval Morphology, Morphometrics, And Development Rates, Susan J. Kutz, Eric P. Hoberg, Lydden Polley

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Morphological and morphometric aspects of larval development of Umingmakstrongylus pallikuukensis in Deroceras laeve and the effects of temperature on development rates in D. laeve and Deroceras reticulatum were investigated in the laboratory. Larval stages were best differentiated by separation of cuticular sheaths, tail structure, and viability following digestion. Growth in body and esophagus width was observed during the first-stage within the intermediate host, but the major increases in body length and width occurred immediately following the second molt. Larval development in D. laeve and D. reticulatum occurred more rapidly at warmer temperatures. The calculated threshold temperatures were 8.5 and 9.5 …

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Phylogey Of Steinernema Travassos, 1927 (Cephalobina: Steinnematidae) Inferred From Ribosomal Dna Sequences And Morphological Characters, S. Patricia Stock, James F. Campbell, Steven A. Nadler Jan 2001

Phylogey Of Steinernema Travassos, 1927 (Cephalobina: Steinnematidae) Inferred From Ribosomal Dna Sequences And Morphological Characters, S. Patricia Stock, James F. Campbell, Steven A. Nadler

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Entomopathogenic nematodes in Steinernema, together with their symbiont bacteria Xenorhabdus, are obligate and lethal parasites of insects that can provide effective biological control of some important lepidopteran, dipteran, and coleopteran pests of commercial crops. Phylogenetic relationships among 21 Steinernema species were estimated using 28S ribosomal DNA (rDNA) sequences and morphological characters. Sequences of the rDNA internal transcribed spacers were obtained to provide additional molecular characters to resolve relationships among Steinernema carpocapsae, Steinernema scapterisci, Steinernema siamkayai, and Steinernema monticolum. Four equally parsimonious trees resulted from combined analysis of 28S sequences and 22 morphological characters. Clades inferred from …

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Synlophe In Ostertagia Cf. Kasakhstanica (Nematoda: Ostertagiinae), The Minor Morphotype Of O. Bisonis From Western North America, Eric P. Hoberg, Arthur Abrams Jan 2001

Synlophe In Ostertagia Cf. Kasakhstanica (Nematoda: Ostertagiinae), The Minor Morphotype Of O. Bisonis From Western North America, Eric P. Hoberg, Arthur Abrams

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Ostertagia cf. kasakhstanica. the putative minor morphotype of the polymorphie ostertagiine O. bisonis, is reported in Bison bison from South Dakota. Descriptions of the synlophe and details of other diagnostic characters useful in identification and differentiation of this minor morphotype from other ostertagiines in wild and domestic ruminants from western North America are presented. Laterally, the cervical synlophe is consistent with Type Ib pattern among ostertagiines and is within the range of variation previously described for O. bisonis. Among recognized minor morphotypes of ostertagiines in wild and domestic ruminants from North America, O. kasakhstanica is distinct from …

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A New Lungworm In Muskoxen: An Exploration In Arctic Parasitology, Susan J. Kutz, Eric P. Hoberg, Lydden Polley Jan 2001

A New Lungworm In Muskoxen: An Exploration In Arctic Parasitology, Susan J. Kutz, Eric P. Hoberg, Lydden Polley

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Ruminants are vital elements of the Holarctic ecosystem. Little is known, however, of the structure or biology of their parasite fauna, particularly in North America. Global warming, coupied with increasing human activity in the Arctic, requires enhanced intemational interdisciplinary efforts to better understand the many factors, including parasites, that influence the population health of caribou, reindeer, muskoxen and wild sheep. The discovery of an unusual new genus of protostrongylid lung nematode in muskoxen from the central Canadian Arctic is described, and the intricacies of the parasite's relationship with its muskoxen definitive hosts, its gastropod intermediate hosts and the arctic environment …

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New Host And Geographic Records For Two Protostrongylids In Dall's Sheep, Susan J. Kutz, A. M. Veitch, Eric P. Hoberg, B. T. Elkin, Emily J. Jenkins, L. Polley Jan 2001

New Host And Geographic Records For Two Protostrongylids In Dall's Sheep, Susan J. Kutz, A. M. Veitch, Eric P. Hoberg, B. T. Elkin, Emily J. Jenkins, L. Polley

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Biodiversity survey and inventory have resulted in new information on the distribution of Protostrongylidae in Dall’s sheep (Ovis dalli dalli) from the Northwest Territories (Northwest Territories, Canada) and from Alaska (Alaska, USA). In 1998, Parelaphostrongylus odocoilei adults were found for the first time in the skeletal muscles of Dall’s sheep in the Mackenzie Mountains (Northwest Territories). Adult P. odocoilei were associated with petechial and ecchymotic hemorrhages and localized myositis; eggs and larvae in the lungs were associated with diffuse granulomatous pneumonia. Experimental infections of the slugs Deroceras laeve and Deroceras reticulatum with dorsal-spined first-stage larvae assumed to be …

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Ancestral Divergence, Genome Diversification, And Phylogeographic Variation In Subpopulations Of Sorbitol-Negative, Β-Glucuronidase- Negative Enterohemorrhagic Escherichia Coli O157, Jaehyoung Kim, Joseph Nietfeldt, Jingliang Ju, John Wise, Narelle Fegan, Patricia Desmarchelier, Andrew K. Benson Jan 2001

Ancestral Divergence, Genome Diversification, And Phylogeographic Variation In Subpopulations Of Sorbitol-Negative, Β-Glucuronidase- Negative Enterohemorrhagic Escherichia Coli O157, Jaehyoung Kim, Joseph Nietfeldt, Jingliang Ju, John Wise, Narelle Fegan, Patricia Desmarchelier, Andrew K. Benson

Department of Food Science and Technology: Faculty Publications

The O157:H7 lineage of enterohemorrhagic Escherichia coli is a geographically disseminated complex of highly related genotypes that share common ancestry. The common clone that is found worldwide carries several markers of events in its evolution, including markers for acquisition of virulence genes and loss of physiological characteristics, such as sorbitol fermentation ability and β-glucuronidase production. Populations of variants that are distinct with respect to motility and the sorbitol and β-glucuronidase markers appear to have diverged at several points along the inferred evolutionary pathway. In addition to these variants, distinct subpopulations of the contemporary non-sorbitol-fermenting, β-glucuronidase-negative O157:H7 clone were recently detected …

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