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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

Microbiota bacteriana em mi?ases umbilicais por larvas de Cochliomyia hominivorax Coquerel, 1858 (Diptera: Calliphoridae) em bezerros naturalmente infestados / Bacterial microbiota in calf navels myiasis by Cochliomyia hominivorax Coquerel, 1858 (Calliphoridae) larvae

Oliveira, Carlos C?sar Mascarenhas da Silva de 14 March 2006 (has links)
Made available in DSpace on 2016-04-28T20:15:36Z (GMT). No. of bitstreams: 1 2006-Carlos Cesar Mascarenhas da Silva de Oliveira.pdf: 2632878 bytes, checksum: d43615ce0a787516f24b8ef5193ca4a6 (MD5) Previous issue date: 2006-03-14 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The objective of this study was to identify the bacterial microbiota in calf navels myiasis caused by Cochliomyia hominivorax larvae. Two places were choosed to colect the material: the Nhumirim ranch belonging to Embrapa Pantanal, Corumb?-MS and the Santo Ant?nio ranch, Miguel Pereira-RJ. There were collected 62 cotton swabs from calf navels naturally caused by C. hominivorax larvae. After that, the cotton swabs were sent to the Veterinary Bacteriology Laboratory at UFRRJ inside carriage test tubes with agar. The primary isolation used bovine blood agar and brain heart infusion (BHI) agar. After the incubation period, the isolates were evaluated by means of Gram staining, catalase testing and 30% KOH. After stained, the isolates were evaluated by their stain morphologic and color characteristics. Species of Staphylococcus spp. were streaked in selectives agar to Staphylococcus spp. for the species identication and was used coagulase test, nitrate reduction test, VP, urease production and sugar fermentation. To Streptococcus spp. was used selective agar to Streptococcus spp. species througout inoculation in metilene blue milk, esculine test and hipurate test. The specimens of the family Enterobacteriaceae used THI test, motility in tube test, indol production test, gelatine production, urease production, citrate and malonate degradation. A total of 89 colonies were isolated; 14 genera and five families were identified. The most frequent family was Enterobacteriaceae and the genera more frequent was Bacillus and Micrococcus. Pathogenic species were isolated, but no secondary infection ocurred in the calves; some antibacterial or bacteriostatic substances may be produced by larvae of C. hominivorax or bacterial microbiota of the myiasis of the navel. / O objetivo deste trabalho foi identificar a microbiota bacteriana de mi?ases umbilicais de bezerros rec?m-nascidos. Dois locais foram escolhidos para coleta de material: a Fazenda Nhumirim pertencente ? Embrapa Pantanal-MS e a Fazenda Santo Ant?nio, no munic?pio de Miguel Pereira-RJ. Amostras do exsudato de les?es por larvas de Cochliomyia hominivorax foram coletados com swabs em 62 bezerros, acondicionadas em tubos de ensaio contendo meio de transporte e encaminhadas ao Laborat?rio de Bacteriologia Veterin?ria da UFRRJ. No isolamento prim?rio foi utilizado ?gar sangue ou ?gar infus?o de c?rebro e cora??o. As col?nias isoladas foram submetidas ? colora??o pelo m?todo de Gram, teste da catalase e hidr?xido de pot?ssio a 3%. De acordo com as caracter?sticas morfotintoriais e de crescimento, os isolados foram processados para melhor identifica??o. Para a identifica??o das esp?cies de Staphylococcus spp.; as col?nias isoladas foram semeadas em meios seletivos, para observa??o dos aspectos fenot?picos caracter?sticos do g?nero. A identifica??o foi efetuada por meio do procedimento padr?o: prova da coagulase livre e ligada, provas de redu??o de nitratos, VP, produ??o de urease e fermenta??o de a??cares. A identifica??o dos isolados de Streptococcus spp foi efetuada atrav?s do repique em meio seletivo e, posteriormente, atrav?s da inocula??o em leite adicionado com azul de metileno, e das provas de hidr?lise da esculina e do hipurato.Para as amostras suspeitas de enterobact?rias, foi utilizado o meio MacConkey no isolamento prim?rio e as seguintes provas de identifica??o: comportamento em ?gar tr?plice a??car-ferro, motilidade em tubo, produ??o do indol, produ??o de ?cidos a partir da glicose, fermenta??o de a??cares, redu??o do nitrato, produ??o de gelatinase, produ??o de urease, degrada??o do citrato e do malonato. Das amostras coletadas, foram isoladas 89 col?nias, representando 14 g?neros diferentes, de cinco fam?lias . A fam?lia mais freq?ente foi a Bacillaceae; sendo os g?neros mais prevalentes o Bacillus e o Micrococcus. Esp?cies patog?nicas foram isoladas, mas infec??o bacteriana n?o foi percebida nos bezerros do experimento; indicando que alguma subst?ncia bactericida ou bacteriost?tica seja produzida pelas larvas ou por alguma bact?ria da microbiota umbilical.

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