Typescript, etc. / Digitized by Kansas State University Libraries

Typescript etc. / Digitized by Kansas State University Libraries

Digitized by Kansas State University Libraries

Digitized by Kansas Correctional Industries

Call number: LD2668 .T4 1955 M68 / Master of Science

Some ill. mounted. Bibliography: leaves [473]-504.

The four objectives of this study were to determine: 1) the incidence of Dirofilaria immitis and Dipetalonema reconditum in dogs of East Central Indiana, 2) the variables significantly affecting the incidence of each parasite, 3) the correlation of heartworm infections with clinical symptoms, and 4) to determine whether Dirofilaria immitis and Dipetalonema reconditum are endemic in Indiana.From December, 1973 to April, 1974, blood samples were taken from 335 dogs in East Central Indiana and were examined for microfilariae using the direct smear and the modified Knott concentration techniques. At the same time, complete information on each dog was collected on a "SURVEY INFORMATION” form. The data was statistically analyzed by crosstabulation of each variable with the results of the blood tests for each parasite. Levels of significance were computed using chi square values with appropriate degrees of freedom. Values of 0.05 were considered to be significant.In this study, the overall incidence of Dirofilaria immitis was found to be 3°% which included one dog infected with both parasites. Of the 131 hunting dogs, 6.1% were infected, while only 1% of the 204 non-hunting dogs were infected. Furthermore, all of the dogs infected with heart-worms were those which were principally outdoor dogs. These differences were significant and they reflect thehigher exposure risk of hunting dogs and dogs living out-doors to the mosquito vectors.The incidence of Dipetalonema reconditum was 6% overall with 11.5 % of the hunting dogs and 2.5% of the non-hunting dogs infected. It was most prevalent in dogs three to six years of age. After age seven the prevalence declined sharply. This decrease with age may be the result of an immune response to the infective larvae which prevents reinfection.Clinical symptoms could not be correlated with infections with Dirofilaria immitis since 90% of the dogs infected with heartworms had no symptoms of the disease. This indicates that most of the heartworm infections in dogs of this area are light, probably involving few adult worms. The results of this study indicate that Dirofilaria imnitis and Dipetalonema reconditum are endemic in Indiana, as 60% of the dogs with heart-worms and 35% of the dogs with Dipetalonema reconditum had never been out of the state.

Some ill. mounted. / Bibliography: leaves [473]-504. / xxxvi, 505 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Pathology, 1984

Orientador: Jane Megid / Banca: José Carlos de Figueiredo Pantoja / Banca: Edviges Maristela Pituco / Resumo: O trabalho teve por objetivo avaliar o potencial de roedores silvestres e outros mamíferos selvagens de pequeno e médio porte como reservatório do vírus vaccínia, bem como determinar os possíveis fatores de risco associados à prevalência de portadores de anticorpos contra Orthopoxvirus em vacas leiteiras e outros animais domésticos, animais selvagens e em humanos. Para tanto, questionário epidemiológico foi aplicado a 47 propriedades rurais distribuídas ao longo dos municípios de Torre de Pedra (com registros oficiais de surtos por VACV afetando rebanhos leiteiros e ordenhadores), Bofete e Anhembi (sem registros oficias de surtos) a fim de levantar dados sobre o estado sanitário de cada propriedade e possíveis fatores de risco. Amostras de sangue e soro foram coletadas, após autorização prévia, de vacas, cavalos, carneiros, suínos, cães e gatos, também dos produtores rurais e seus familiares, e dos animais selvagens capturados em cada propriedade. Foram conduzidas análises sorológicas através das técnicas de vírus neutralização (para amostras de soro humano e de animais domésticos) e teste de neutralização pela redução da formação de placas (para amostras de animais selvagens). Os resultados mostram baixa positividade entre os animais selvagens e alta positividade entre domésticos e humanos, sugerindo que algumas espécies domésticas como cães e cavalos podem representar possíveis reservatórios além de apontar fatores de risco como a fonte de água e animais selvagens de hábitos ribeirinhos, como futuros alvos de estudo sobre as formas de disseminação do vírus vaccínia / Abstract: This work aimed analyze the potential of wild rodents and others wild mammals as vaccinia virus reservoir, as well as to determine the risk factors associated to orthopoxvirus antibodies prevalence in milking cows and other domestic animals, wild animals and humans. An epidemiological questionnaire was applied to 47 farms distributed among Torre de Pedra, Bofete and Anhembi, to obtain data about sanitary situation of the farms and possible risk factors. Blood samples were collected from cows, horses, sheep, swine, dogs and cats, also from milker and their family, and from wild animals trapped in each farm. Serologic analyzes were proceeded using virus neurtalization (for humans and domestic animals samples) and Plaque Reduction Neutralization Test (for wild animals). The results showed low percentage of positivity in wild animals and high positivity between humans and domestic animals, suggesting other possible reservoirs like dogs and horses as possible reservoirs and source of water and riparian wild animals as risk factor for VACV infection opening new targets for future studies about Vaccinia virus dissemination / Mestre

Made available in DSpace on 2014-06-11T19:29:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-12-12Bitstream added on 2014-06-13T18:59:02Z : No. of bitstreams: 1 peres_mg_me_botfmvz.pdf: 321962 bytes, checksum: e4980a385d5afa43c314d6e3ff0b8080 (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / O trabalho teve por objetivo avaliar o potencial de roedores silvestres e outros mamíferos selvagens de pequeno e médio porte como reservatório do vírus vaccínia, bem como determinar os possíveis fatores de risco associados à prevalência de portadores de anticorpos contra Orthopoxvirus em vacas leiteiras e outros animais domésticos, animais selvagens e em humanos. Para tanto, questionário epidemiológico foi aplicado a 47 propriedades rurais distribuídas ao longo dos municípios de Torre de Pedra (com registros oficiais de surtos por VACV afetando rebanhos leiteiros e ordenhadores), Bofete e Anhembi (sem registros oficias de surtos) a fim de levantar dados sobre o estado sanitário de cada propriedade e possíveis fatores de risco. Amostras de sangue e soro foram coletadas, após autorização prévia, de vacas, cavalos, carneiros, suínos, cães e gatos, também dos produtores rurais e seus familiares, e dos animais selvagens capturados em cada propriedade. Foram conduzidas análises sorológicas através das técnicas de vírus neutralização (para amostras de soro humano e de animais domésticos) e teste de neutralização pela redução da formação de placas (para amostras de animais selvagens). Os resultados mostram baixa positividade entre os animais selvagens e alta positividade entre domésticos e humanos, sugerindo que algumas espécies domésticas como cães e cavalos podem representar possíveis reservatórios além de apontar fatores de risco como a fonte de água e animais selvagens de hábitos ribeirinhos, como futuros alvos de estudo sobre as formas de disseminação do vírus vaccínia / This work aimed analyze the potential of wild rodents and others wild mammals as vaccinia virus reservoir, as well as to determine the risk factors associated to orthopoxvirus antibodies prevalence in milking cows and other domestic animals, wild animals and humans. An epidemiological questionnaire was applied to 47 farms distributed among Torre de Pedra, Bofete and Anhembi, to obtain data about sanitary situation of the farms and possible risk factors. Blood samples were collected from cows, horses, sheep, swine, dogs and cats, also from milker and their family, and from wild animals trapped in each farm. Serologic analyzes were proceeded using virus neurtalization (for humans and domestic animals samples) and Plaque Reduction Neutralization Test (for wild animals). The results showed low percentage of positivity in wild animals and high positivity between humans and domestic animals, suggesting other possible reservoirs like dogs and horses as possible reservoirs and source of water and riparian wild animals as risk factor for VACV infection opening new targets for future studies about Vaccinia virus dissemination