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Biomedical subjects

L E Hanson

Publications and source records attributed to L E Hanson.

At least 19 recordsLinked to original sources
PubMed1996

Nursing students' perspectives: experiences of caring and not-so-caring interactions with faculty.

The purpose of this study was to describe the meaning of baccalaureate nursing students' lived experience of caring and not-so-caring interactions with faculty. The research questions explored the phenomenon of being cared-for or not-cared-for by asking, "What does being cared-for by faculty mean to baccalaureate nursing students?" Students were also asked to describe not-so caring interactions with faculty. Seventeen baccalaureate nursing students at a private liberal arts college and 15 baccalaureate nursing students at a public university were interviewed. Transcripts of the tape-recorded interviews were analyzed using Giorgi's technique. After reflection upon the content of the interviews, significant statements were identified, meaning units were developed, and themes were extracted which were then abstracted into categories of Recognition, Connection, and Confirmation/Affirmation. Finally, general structural descriptions of phenomena of a caring and of a not-so-caring interaction were constructed. Implications for teaching, research, and practice are described.

Adult↗
PubMed1991

Leptospira interrogans serovar bratislava infection in two dogs.

Two dogs with clinical histories suggestive of leptospirosis were examined serologically and culturally for evidence of leptospiral infection. Antibodies to Leptospira interrogans serovar bratislava were detected in serum from one dog, and the organism was isolated from urine of that dog. In a serologic survey of dogs in the state of Illinois, reactor rates to bratislava were higher than those to canicola or icterohaemorrhagiae. In cases of suspect canine leptospirosis, serovars such as bratislava, not contained in canine vaccines, should be considered in a differential diagnosis.

Animals↗
PubMed1989

Effect of vaccination with a bacterin containing Leptospira interrogans serovar bratislava on the breeding performance of swine herds.

Swine herds suspected to be infected with Leptospira interrogans serovar bratislava were vaccinated with bacterins containing 5 or 6 leptospiral serovars in which serovar bratislava was the unique component. The principal diagnostic feature indicating an infection by this organism was demonstration of antibody against serovar bratislava in sera from stillborn pigs. For 1 breeding cycle after vaccination of herds on 3 farms, 255 of 266 (95.9%) sows and gilts given the 6-serovar bacterin farrowed. In contrast, 233 of 311 (74.9%) sows and gilts given the 5-serovar bacterin farrowed. These results, as evaluated by analysis of variance techniques, showed a significant improvement (P less than 0.01) in reproductive performance for groups vaccinated against serovar bratislava.

Animals↗
PubMed1987

Lighting and sex ratio for breeding ringnecked pheasants in confined housing.

In two trials with breeding pheasants, pheasants were assigned to two male:female sex ratios (1:12 and 1:18) arranged factorially with two lighting regimens (14 or 16 hr of light) in a 24-hr period. In each trial, 1644 or 1680 pheasant hens divided in two replicates were assigned to each experimental treatment and placed in controlled environment housing. Hen mortality, percent culled eggs, total eggs per hen-housed, fertility, hatchability, and usable chicks per hen-housed were determined over a 9-week production period. Although mortality and percent hatch were not affected by either sex ratio or lighting, percent culled eggs increased with increased light (16 hr light) and usable chicks per hen-housed decreased with increased light. Increasing the sex ratio from 1:12 to 1:18 increased egg production but decreased fertility. These data demonstrate that pheasants reared in a controlled environment require less than 16 hr light for maximizing usable chick production per hen-housed and there is a trade-off between fertility and egg production.

Animals↗
PubMed1985

Experimental infection of lactating goats with Leptospira interrogans serovars pomona and hardjo.

Pathogenesis of Leptospira interrogans serovars pomona and hardjo was evaluated in 14 lactating goats. Although mild clinical signs of leptospiral infection characterized by pyrexia and reduction in milk yield appeared in some animals, a consistent clinical pattern was not observed in the inoculated animals. The pomona serovar was isolated from the kidney of 1 of the 4 goats inoculated with serovar pomona. The hardjo serovar (strain UI 750) was isolated in the rabbit serum-supplemented bovine albumin polysorbate-80 liquid medium only from the mammary gland of 1 of 4 goats at 13 days after inoculation with serovar hardjo. The positive culture was detected after an 8-month incubation period.

Animals↗
PubMed1985

Experimental infection of pregnant and lactating goats with Leptospira interrogans serovars hardjo and szwajizak.

Pathogenesis of 2 Leptospira serovars, hardjo and szwajizak, was studied in pregnant and lactating goats. Although clinical signs of leptospiral infection were minimal, cultural isolations were made from the mammary gland of 2 goats and the kidney of 1 goat inoculated with serovar hardjo (C846). The isolations were made only on solid bovine albumin polysorbate-80 medium supplemented either with rabbit serum or sodium pyruvate. Cultural isolations of serovar szwajizak were made from kidney, liver, brain, urine, and mammary gland samples of 1 goat and the liver and kidney samples of its kids. These isolations were made in only the solid bovine albumin polysorbate-80 medium which had been supplemented with normal goat serum.

Animals↗
PubMed1983

Can antibody responses in cattle vaccinated with a multivalent leptospiral bacterin interfere with serologic diagnosis of disease?

A commercially available leptospiral bacterin containing 5 serovars (canicola, grippotyphosa, hardjo, icterohemorrhagiae, pomona) was used per label directions to vaccinate 45 steers and bulls. In animals in which the prevaccination sera were negative for microscopic agglutinating antibody, the increase and decrease of titers were similar among all serovars. A serologic response was stimulated by a single dose and enhanced by the 2nd dose. Most titers peaked at 2 weeks and then fell rapidly by 15 weeks after the 2nd dose. Thirty-four animals with prevaccinal titers to serovar hardjo responded with high microscopic agglutinating titers for a sustained period. Of these cattle, 31 still had titers between 200 and 400 by 29 weeks after the 2nd dose. These results were interpreted as representing an anamnestic response initiated by the bacterin to a sensitization that had followed natural exposure.

Agglutination Tests↗
PubMed1980

Sodium requirements, balance and tissue composition of growing pigs.

The sodium requirements, balance, excretion, patterns and composition of some pig tissues were studied in two feeding trials and a balance trial followed by an additional feeding period with terminal tissue composition analysis. The growth of pigs fed a corn-soybean meal diet without added salt was severely restricted. Results confirm that a sodium requirement of .09% of the diet is adequate and that .20% NaCl supplementation is adequate for any natural diet for swine. Diets containing .065% sodium caused about a 25% reduction in growth when fed to 10-kg pigs but no significant reduction when fed to 27-kg pigs. Dietary retention was 96% for pigs fed .032% or .067% sodium. Retention was less per unit gain (gain was greater per unit sodium retention) fo9r pigs fed .032% sodium than for pigs fed .067% or more sodium. Those fed .032% sodium had a greater PCV after 1 week on trial and a smaller plasma sodium concentration after 2 weeks. The terminal tissue analyses showed that the pigs fed the lowest sodium diet had lower concentrations of sodium in plasma, muscle and bone, lower concentrations of chloride in plasma and muscle and a greater plasma potassium concentration. Crystal sodium of bone was not significantly affected.

Animal Nutritional Physiological Phenomena↗
PubMed1980

Growth of hebdomadis group of leptospires in solid medium.

Leptospira hardjo, szwajizak, and sejroe produced colonial growth in bovine albumin polysorbate 80 (BAP80) solid medium which had been supplemented either with sodium pyruvate (100 micrograms/ml) or with 5% rabbit serum. Leptospira hardjo produced two morphologic types of colonies in both supplemented media. Growth did not occur with any of the three serovars in the unsupplemented BAP80 medium. These results indicate that addition of either rabbit serum or sodium pyruvate would aid in promoting growth of some fastidious leptospires.

Culture Media↗