Submitted by Cássio da Cruz Nogueira (cassionogueirakk@gmail.com) on 2017-05-15T11:31:56Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_RespostaImuneHumoral.PDF: 1103336 bytes, checksum: f20142b1495f0855c37bd778d9a9dda5 (MD5) / Approved for entry into archive by Edisangela Bastos (edisangela@ufpa.br) on 2017-05-16T17:13:52Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_RespostaImuneHumoral.PDF: 1103336 bytes, checksum: f20142b1495f0855c37bd778d9a9dda5 (MD5) / Made available in DSpace on 2017-05-16T17:13:52Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_RespostaImuneHumoral.PDF: 1103336 bytes, checksum: f20142b1495f0855c37bd778d9a9dda5 (MD5) Previous issue date: 2013-08-31 / A brucelose está distribuída em todo território nacional, com maior prevalência para a espécie Brucella abortus que apesar de ser endêmica, apresenta-se de forma heterogênea entre as diferentes regiões do Brasil. O presente estudo tem por objetivo avaliar a resposta imune humoral de bezerras bubalinas criadas na Mesorregião do Médio Amazonas, vacinadas com a cepa B19 de B. abortus na idade preconizada pelo Programa Nacional de Controle e Erradicação da Brucelose e Tuberculose (PNCEBT). Foram selecionadas e acompanhadas 36 fêmeas (grupo teste) e 6 machos (grupo controle) com idades entre 3-8 meses. No dia 0 foi coletado sangue de todos os animais, em seguida todas as fêmeas receberam vacina comercial com amostra B19 em dose padrão conforme orienta o PNCEBT, com posteriores coletas de sangue realizadas aos 30, 60, 90, 120, 150, 180, 210, 330, 360 e 390 dias. Os soros sanguíneos foram avaliados pelo soro aglutinação das provas de triagem: Antígeno Acidificado Tamponado - AAT e pela prova confirmatória: 2 Mercaptoetanol - 2ME. Os resultados obtidos para todas as amostras coletas no dia 0 apresentaram resultado negativo na reação. Aos 30 e 60 dias todas as fêmeas apresentaram 100% de reação na prova AAT e titulação de 1:200, iniciando o declínio da titulação aos 90 dias nas duas provas. Aos 210 dias as fêmeas ainda reagentes apresentaram resultados similares nas duas provas, tendo apenas um animal se mantido reativo nas duas provas até 360 dias e, somente aos 390 dias 100% das fêmeas obtiveram reação negativa nas duas provas, durante todo o experimento os machos foram não reativos. Assim, pela avaliação dos resultados, a vacinação mostrou-se eficaz para a imunização, sendo uma ferramenta importante na profilaxia da brucelose na espécie estudada, bem como as provas aplicadas para o diagnostico dessa enfermidade em búfalos a nível regional. / Brucellosis is spread throughout the country, with the highest prevalence for the strain Brucella abortus that despite being endemic presents unevenly among different regions of Brazil. This study aims to evaluate the humoral and immune response of buffalo calves raised in the Middle Amazon Mesoregion, Pará state, vaccinated with B19 strain of B. abortus according the age recommended by the National Program for the Control and Eradication of Brucellosis and Tuberculosis (PNCEBT). Thirty-six female (test group) and six males (control group) aged 3-8 months were selected and monitored. On day 0 of the experiment, blood was collected from all animals, then all females received commercial vaccine with standard-dose sample B19 as recommended by PNCEBT with subsequent blood samples were taken at 30, 60, 90, 120, 150, 180, 210, 330, 360 and 390 days, respectively. The blood serums were evaluated for evidence of agglutination screening through Buffered Acidified Antigen - AAT and the confirmatory test through 2 Mercaptoethanol - 2ME. The results for all samples collected on day 0 were negative in the reaction, however at 30 and 60 days all females were 100% positive through test reaction AAT and titration 1:200, starting the decline through the titration at 90 days in both events. Females at 210 days still present reagents with similar results in both tests, however only one animal remained reactive in both tests up to 360 days. After 390 days of the begin of the experiment 100% of the females had a negative reaction in both events and throughout the experiment males were negative. Thus, by the evaluation of results, vaccination was effective for immunization, as well as an important tool in the prophylaxis of brucellosis in the species studied, as well as the tests applied to the diagnosis of this disease in buffaloes species at regional level.