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Pathogenicity of experimentally induced concurrent infections of Fasciola hepatica and Haemonchus contortus in sheep

Creator:: Presidente, Paul J.
Abstract:: Twenty yearling sheep were allotted to four groups, each containing five sheep of approximately equal weight. On experimental days 0, 1, 2, 3, and 4, each sheep in each group was given the following inoculations by stomach tube: five sheep in group I (Fasciola hepatica-exposed controls) were given approximately 120...
Resource Type:: Dissertation
Full Text:: HEPATICA AND HAEMONCHUS CONTORTUS IN SHEEP Abstract approved: Redacted for privacy Stuart E. ,Knapp

Histochemical study of some enzymes of the common liver fluke, Fasciola hepatica L.

Creator:: Panitz, Eric
Abstract:: Acid and alkaline phosphatase was localized histochemically in the intestinal epithelium and excretory duct respectively in fresh frozen sections of Fasciola hepatica. Polyphenol oxidase was localized in the vitellaria, vitelline ducts and egg-shells. The distribution and nature of esterases was examined histochemically. Acetyl-cholinesterase was observed in the tegument, neural ganglia,...
Resource Type:: Dissertation
Full Text:: Privacy Stuart E. Knapp I Acid and alkaline phosphatase was localized histochemically in the intestinal

Transmission of "Salmon Poisoning" disease to dogs by Nanophyetus salmincola eggs

Creator:: Nyberg, Peter Albert
Abstract:: The presence of the etiologic agent of "salmon poisoning" disease, Neorickettsia helminthoeca, was demonstrated in eggs of the trematode vector, Nanophyetus salmincola. Three dogs were given 100,000 and one dog 82,000 ground fluke eggs by intraperitoneal injection. The four animals developed "salmon poisoning" disease and died. One of these dogs...
Resource Type:: Dissertation
Full Text:: ) Stuart E. Knapp The presence of the etiologic agent of "salmon poisoning" disease, Neorickettsia

The biology of Nanophyetus salmincola (Chapin) in its snail intermediate host, Oxytrema silicula

Creator:: Law, Daniel Tin-Hung
Resource Type:: Masters Thesis
Full Text:: , OXYTREMA SILICULAI Abstract approved: Dr. Stuart E. Knap The effects of light, pH and temperature on

Studies on some digenetic trematodes from Ritner Creek, Polk County, Oregon

Creator:: Law, Daniel Tin-Hung
Abstract:: Seven species of fresh water fishes belonging to three different families and two species of snails from Ritner Creek, Polk County, Oregon were surveyed for adult and larval trematodes. A total of seven species of trematodes representing four families was recovered from the intestine of the fishes. Of these, at...
Resource Type:: Dissertation
Full Text:: RITNER CREEK, POLK COUNTY, OREGON Abstract approved: Redacted for privacy Stuart E. Knat4o Seven

The effects of various factors on the formation and fate of extranuclear chromatic bodies in Tetrahymena pyriformis

Creator:: Salamone, Michael
Abstract:: During karyokinesis in the ciliate, Tetrahymena pyriformis, strain GL-I, an extranuclear chromatin body (ECB) is frequently formed as an excluded mass between the two dividing daughter macronuclei. The formation and fate of ECB's were followed by means of Feu lgen, toluidine blue 0, and euchrysine staining and autoradiography (³H-thymidine). The...
Resource Type:: Dissertation
Full Text:: those who I may miss or fail to give full due. To Dr. D. Stuart Nachtwey and Dr. Ernst J. Dornfeld

Sphaeromyxa maiyai sp. n. (Protozoa:Myxosporidea) : a light microscopic and ultrastructural analysis employing the scanning and transmission electron microscopes

Creator:: Morrison, N. Donald
Abstract:: Sphaeromyxa maiyai sp. n. (Myxosporidea:Myxiidae) is described from the gall bladder of the Pacific tomcod, Microgadus proximus Girard, from Newport, Oregon. The plasmodial (=trophic, trophozoite) stage is discoid averaging between 1 and 2 cm. The spore averages 27.6 x 5. 6μm with pyriform polar capsules averaging 9. 3 x 3....
Resource Type:: Dissertation
Full Text:: MICROSCOPES Abstract approved: Redacted for Privacy Dr. Stuart E. Knapp[/ Dr. Ivan Pratt, deceased

The chromosomes of Northwest pulmonate snails

Creator:: Ford, James M., 1927-
Resource Type:: Dissertation
Full Text:: Dr. Ernst J. Dornfeld, my major professor, for his ever willing help and patient guidance in the

An Integrated Approach to Gauge the Effects of Global Climate Change on Headwater Stream Ecosystems

Creator:: Bury, Gwendolynn W.
Abstract:: Climate change is predicted to affect ecosystems, including systems already stressed by human impacts. One ecosystem that is already highly impacted by human land use is the cold headwater stream system of the Pacific Northwest. One method of assessing the function of an ecosystem is by using an indicator species....
Resource Type:: Dissertation
Full Text:: Ecosystems. Abstract approved: ______________________________________________________ Stevan J

Axial organ : its potential role in echnoid immunity

Creator:: Larson, Maureen Kupke
Abstract:: The echinoderm axial organ is located centrally, at the meeting point of the animals' "circulatory" systems. This, and its unusual histology, have prompted the implication of a number of different functions for the organ, including circulation, excretion and host defense. None of these have been definitively proven. Claims that starfish...
Resource Type:: Masters Thesis
Full Text:: possible without the guidance of others. My husband, Stuart, has been unselfish in his love and

ScholarsArchive@OSU

Pathogenicity of experimentally induced concurrent infections of Fasciola hepatica and Haemonchus contortus in sheep

Histochemical study of some enzymes of the common liver fluke, Fasciola hepatica L.

Transmission of "Salmon Poisoning" disease to dogs by Nanophyetus salmincola eggs

The biology of Nanophyetus salmincola (Chapin) in its snail intermediate host, Oxytrema silicula

Studies on some digenetic trematodes from Ritner Creek, Polk County, Oregon

The effects of various factors on the formation and fate of extranuclear chromatic bodies in Tetrahymena pyriformis

Sphaeromyxa maiyai sp. n. (Protozoa:Myxosporidea) : a light microscopic and ultrastructural analysis employing the scanning and transmission electron microscopes

The chromosomes of Northwest pulmonate snails

An Integrated Approach to Gauge the Effects of Global Climate Change on Headwater Stream Ecosystems

Axial organ : its potential role in echnoid immunity

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