Thesis (Ph. D.)--Ohio state University, 1928. / Autobiography: p. [3] of cover. Published also as Bulletin 428 of the Ohio Agricultural experiment station, Wooster. "Literature cited": p. 43-45.

Thesis (Ph. D.)--Ohio state University, 1928. / Autobiography: p. [3] of cover. Published also as Bulletin 428 of the Ohio Agricultural experiment station, Wooster. "Literature cited": p. 43-45.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1949. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves [83]-87).

1. Hypoderma lineatum and Hypoderma bovis are prevalent in Burkes Garden and Southwestern Virginia generally. 2. Young cattle, calves and yearlings particularly, are generally more heavily infested than older cattle. 3. Adults appear in Burkes Garden the first warm days in April though they are at their worst in June and July, a normal season. 4. Larvae ordinarily make their first appearance in the subcutaneous tissues of the back about the first of December. The first ones emerge and pupate about the middle of January. 5. At the time control was started H. lineatum exceeded H. bovis in the ratio of 65 to 35 percent. The ratio now is 55 to 45 percent. 6. Salt, wet or dry, is an ineffective dressing for killing Hypoderma larvae in the subcutaneous tissues of the host. 7. Benzol, 90 or 100 percent, injected into larval cysts effects a high percentage of kill. 8. Hand extraction at intervals of 30 days repeated five times is a practical and effective means of control. 9. Hand extraction performed by the average farm worker caused an occasional case of anaphylaxis, .037 percent 10. Cooperative control measures, to be effective, should be supervised closely. 11. Extraction of Hypoderma larvae from the subcutaneous tissues of the host effects gains in weight and milk flow advantageously. 12. Control measures as practiced in Burkes Garden has reduced Hypoderma infestation by approximately 50 percent. / M.S.

Made available in DSpace on 2016-04-27T18:12:39Z (GMT). No. of bitstreams: 1 Roberta Robba Asola Fratti.pdf: 1045802 bytes, checksum: a3bb5045a43064f459393edbd811e6cf (MD5) Previous issue date: 2009-02-19 / Introduction: Despite technological advances currently available, the audiometric test tonal still represents the only test that evaluates the hearing in a range of frequencies. Due to cases of incompatibility of results in clinical practice is essential to conduct research using different stimuli during the tests. Objective: To compare PTA thresholds gotten with the warble and narrow band stimuli in subjects with sensorio-neural hearing loss, without and with tinnitus. Method: The audiometric thresholds by air conduction with the stimulus warble and narrow band were researched in the frequencies 250 to 8000Hz in both ears in three groups: subjects with normal hearing, with hearing loss and without tinnitus and with hearing loss and tinnitus. Results: The results demonstrated meaningful statistic differences between warble and narrow band in all of groups. In the comparative analysis, the differences had been higher, with significance statistics, in the groups with hearing loss when compared with the subjects with normal hearing, independently of the tinnitus. Conclusion: the use of different stimulus in the audiometric evaluation can represent an important strategy for attainment of trustworth thresholds, mainly in subjects with hearing losses / Introdução: Apesar dos avanços tecnológicos atualmente disponíveis, a audiometria tonal ainda representa o único teste de audição que avalia a acuidade auditiva em uma determinada faixa de freqüências. Devido aos casos de incompatibilidade dos resultados encontrados na prática clínica é fundamental a realização de pesquisas utilizando diferentes estímulos durante os testes. Objetivo: Comparar os limiares audiométricos obtidos com os estímulos warble e narrow band em sujeitos com perda auditiva sem e com a presença de zumbido. Método: Foi realizada a audiometria tonal liminar por via aérea com os estímulos warble e narrow band nas freqüências de 250 a 8000 Hz (Hertz) em ambas as orelhas em três grupos: normo-ouvintes, com perda auditiva e sem zumbido e com perda auditiva e com zumbido. Resultados: Os resultados encontrados mostraram diferenças estatisticamente significantes entre o warble e narrow band intragrupos. Na análise comparativa, as diferenças foram maiores, com significância estatística, nos grupos com perda auditiva quando comparados aos normo-ouvintes, independentemente da presença de zumbido. Conclusão: a utilização de diferentes estímulos na realização da avaliação audiométrica pode representar uma importante estratégia para obtenção de limiares fidedignos, principalmente em indivíduos com perdas auditivas