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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo Cl?nico da Otite em Felinos e a Efic?cia in vitro e in vivo da Levofloxacina no tratamento t?pico da otite externa / Clinical Study in Feline Otitis and In vitro and in vivo efficacy of Levofloxacin as treatment of feline bacterial external otitis

Laguna, Ana?s Gabriela Villarreal 21 December 2015 (has links)
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-02-15T15:46:57Z No. of bitstreams: 1 2015 - Ana?s Gabriela Villarreal Laguna.pdf: 1531103 bytes, checksum: 8567bc787b67e1d16f71708035dbfc97 (MD5) / Made available in DSpace on 2017-02-15T15:46:58Z (GMT). No. of bitstreams: 1 2015 - Ana?s Gabriela Villarreal Laguna.pdf: 1531103 bytes, checksum: 8567bc787b67e1d16f71708035dbfc97 (MD5) Previous issue date: 2015-12-21 / Otitis is defined as an inflammation, acute or chronic, of the ear canal and it?s considered one of the most common diseases in small animal practice. It possesses various perpetuating agents, bacteria and yeast being the most common. Treatment is based in the recognition of the primary causes and predisposing factors, and the resolution of secondary infections. A greater sensitivity in feline ear canal has also been shown, when compared to dogs. With this in mind, a product with the least possible active ingredients would be the ideal topical treatment in felines. However, the majority of available products combine antibiotics and antifungals, this combination not being necessary in all cases; for bacterial otitis, very few specific products exist, and some of them present a proven ototoxic potential. In face of this problem, the efficacy of a new formulation using levofloxacin for the specific treatment of bacterial otitis was made by the Farmacologia e Farmacometria sector of the LQEPV ? UFRRJ, using isopropylic alcohol as vehicle. Eighteen adult felines, belonging to the Laborat?rio de Quimioterapia Experimental em Parasitologia Veterin?ria (LQEPV-UFRRJ), diagnosed with bacterial otitis according to clinical signs (erythema, inflammation, pruritus, hyperpigmentation and secretions), as well as cytological exams and video-otoscopy, were chosen. Individual data was registered in specific formularies for comparison of pretreatment and post treatments evaluations. After the initial evaluation the animals were divided into three groups, according to treatment: in Group A or control (6 animals) a placebo (vehicle) was used; in Group B (6 animals) a formulation of levofloxacin 0, 5% was used; Group C (6 animals) a formulation of de levofloxacin 0, 5% + dexamethasone 0, 02% was used. In every case 0, 5 ml was applied to each ear, once a day for 15 consecutive days. Post treatment video-otoscopies were performed on day +21, and post treatment cytologies were performed on days +7, +14 and +21. The animals were always observed by the same evaluator, avoiding errors of concordance and checking for possible reactions to the product. None of the animals presented adverse reactions to the product during the treatment period, besides slight discomfort immediately after application. Animals from Group A continued with the same scores until the end of the experiment. Animals from Group B presented an initial clinical improvement, but some of them developed a fungal otitis as time passed. Animals from Group C presented a significant improvement since day +7, with no secondary alterations through time. It is demonstrated that a formulation of de levofloxacin + dexamethasone can be efficient and safe for the treatment of feline bacterial otitis / A otite ? definida como uma inflama??o, aguda ou cr?nica, do conduto auditivo e ? uma das doen?as mais frequentes na cl?nica de animais de companhia. Possui diversos agentes perpetuantes, sendo mais comuns as bact?rias e leveduras. O tratamento e baseado no reconhecimento de causas principais e fatores predisponentes, assim como a resolu??o de infec??es secund?rias. Tem sido relata uma sensibilidade maior nos condutos auditivos dos gatos, quando comparados com c?es. Deste modo, um produto com poucos ingredientes farmacologicamente ativos seria o tratamento t?pico ideal em felinos. No entanto, a maioria dos produtos para otite dispon?veis no mercado combina tanto antibi?ticos, como antif?ngicos, n?o sendo esta combina??o necess?ria em todos os casos; especificamente para otites bacterianas, existem poucos produtos espec?ficos, e muitos apresentam um potencial otot?xico j? comprovado. Perante este problema, foi avaliada a efic?cia de uma nova formula??o a utilizando levofloxacina para o tratamento espec?fico da otite bacteriana em felinos, o produto foi confeccionado pelo setor de Farmacologia e Farmacometria do LQEPV ? UFRRJ, utilizando como ve?culo ?lcool isoprop?lico. Foram selecionados 18 felinos adultos pertencentes ao Laborat?rio de Quimioterapia Experimental em Parasitologia Veterin?ria (LQEPV-UFRRJ), diagnosticados com otite bacteriana de acordo com sinais cl?nicos (eritema, inflama??o, prurido, hiperpigmenta??o e presen?a de secre??o), exame citol?gico e v?deo-otoscopia. Os dados individuais foram registrados em formul?rios espec?ficos para compara??o das avalia??es inicias e p?s-tratamento. Ap?s as avalia??es iniciais, os animais foram divididos em tr?s grupos experimentais: no grupo A, controle, seis animais utilizaram um Placebo (ve?culo); no grupo B, seis animais utilizaram a formula??o contendo Levofloxacina a 0,5%; e no grupo C, seis animais foram medicados com a associa??o de Levofloxacina 0,5% com dexametasona 0,02%. Em todos os casos foram instilados 0,5ml em ambas as orelhas uma vez por dia, durante 15 dias consecutivos. Exames vide-otosc?picos p?s-tratamento foram realizadas no dia +21, e citologias nos dias +7, +14 e +21. Os animais foram observados diariamente sempre pelo mesmo avaliador, evitando assim erros de concord?ncia e acompanhando poss?veis rea??es adversas ao produto. Nenhum animal apresentou rea??o adversa ao produto durante o per?odo de tratamento, al?m de incomodo no momento imediato ap?s a aplica??o. Os animais do grupo A continuaram com o mesmo score registrado no dia 0 at? finalizado o experimento. Os animais do grupo B apresentaram melhoria inicial, porem alguns deles desenvolveram otite f?ngica ao decorrer do tempo. J? os animais do grupo C apresentaram uma melhora significativa desde o dia +7, sem altera??es secund?rias no decorrer do experimento. Demostra-se assim que a associa??o de levofloxacina 0,5% com dexametasona 0,02% pode ser eficaz e segura para o tratamento da otite bacteriana em felinos

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