Submitted by (edna.saturno@ufrpe.br) on 2016-10-18T13:39:28Z No. of bitstreams: 1 Luiz Carlos Fontes Baptista Filho.pdf: 748065 bytes, checksum: c624b21e9ec70bfdd8c60bd08dac6e9f (MD5) / Made available in DSpace on 2016-10-18T13:39:28Z (GMT). No. of bitstreams: 1 Luiz Carlos Fontes Baptista Filho.pdf: 748065 bytes, checksum: c624b21e9ec70bfdd8c60bd08dac6e9f (MD5) Previous issue date: 2012-03-17 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / Enzootic Leukosis (EBL) and Bovine Tuberculosis (BT) compromise the immune status of the herds, especially the immunosuppressive potential of bovine leukosis virus (BLV). Several factors interfere with leukocyte values of cattle, but little is known about the effects of BT on them. The aim with the study was to evaluate the leukogram of tuberculinized cattle, with a view to the use of leukocytes as an epidemiologic tool in combating EBL in dairy herds of Pernambuco. 1.000 serum samples from 33 herds of cattle coming from various municipalities in the state were submitted to the serodiagnosis of EBL (AGID), being 920 cattle previously tuberculinized by the simultaneously comparative technique (SCT). Blood smears were prepared of all tuberculinized cattle, and the total and differential leukocyte count was performed using conventional techniques. The evaluation of the influence of BT in leukocyte counts was performed by comparing the results of four experimental groups, according to the results of the AGID and SCT (gTB group - 41 to the positive SCT; group gLEB - the 151 AGID positive, group gNEG - 379 to the negative TSC and AGID, group gINT - 43 positive to both tests). The prevalence rates of TB and LEB were, respectively, 11% (99/920) and 28% (282/1000), with 88% (29/33) of herds contributing at least one animal positive for one or both tests. From the 920 cattle examined, 43 (4,7%) were positive to both tests simultaneously. The mean values of leukocytes and lymphocytes (x 103/mm3 of blood) of the experimental groups were, respectively: gTB 9,6 ± 2,5 and 5,9 ± 1,9; gLEB 13,3 ± 6,3 and 9,1 ± 6,0; gNEG 11,5 ± 3,8 and 7,6 ± 5,1; and gINT 11,8 ± 4,3 and 8,0 ± 3,5. There were significant differences (p<0,05) between leukocytes and lymphocytes, when confronted gTB group (lower values) and gLEB (higher values) with the gNEG group, while gINT group did not differ (p>0,05) in none of the parameters analyzed in relation to the group gNEG. It is concluded that the leukogram is influenced by bovine BT, and health programs to combat LEB in dairy herds in the state of Pernambuco, and include the white blood cell count as an epidemiologic tool wish to consider the strategic prior tuberculin test the herds involved, being discarded cattle that are experiencing imunoalergic test positivity. / Leucose Enzoótica (LEB) e Tuberculose bovina (TB) comprometem o estado imunitário dos rebanhos, especialmente pelo potencial imunodepressor do Vírus da Leucose Bovina (VLB). Inúmeros fatores interferem nos valores leucométricos dos bovinos, porém, pouco se sabe dos efeitos da TB sobre os mesmos. O objetivo com o estudo foi avaliar o leucograma de bovinos tuberculizados, com vista ao uso da leucometria como ferramenta epidemiológica no combate à LEB em rebanhos leiteiros de Pernambuco. Amostras séricas de 1.000 bovinos procedentes de 33 rebanhos de diversos municípios do estado foram submetidas ao sorodiagnóstico da LEB (IDGA), sendo 920 bovinos previamente tuberculinizados pela técnica simultânea comparada (TSC). Esfregaços sanguíneos foram confeccionados de todos os bovinos tuberculinizados, sendo a contagem total e diferencial dos leucócitos realizada usando técnicas convencionais. A avaliação da influência da TB no leucograma foi realizada pelo confronto dos resultados de quatro grupos experimentais, em função dos resultados da IDGA e TSC (grupo gTB - 41 positivos ao TSC; grupo gLEB - 151 positivos à IDGA; grupo gNEG - 379 negativos ao TSC e IDGA; grupo gINT - 43 positivos a ambos os testes). As taxas de prevalência da TB e da LEB foram, respectivamente, 11% (99/920) e 28% (282/1000), com 88% (29/33) dos rebanhos contribuindo com ao menos um animal positivo para um ou ambos os testes. Dos 920 bovinos examinados, 43 (4,7%) apresentaram positividade simultânea a ambos os testes. Os valores médios dos leucócitos e linfócitos (x 103/mm3 de sangue) dos grupos experimentais foram, respectivamente: gTB 9,6 ± 2,5 e 5,9 ± 1,9; gLEB 13,3 ± 6,3 e 9,1 ± 6,0; gNEG 11,5 ± 3,8 e 7,6 ± 5,1; e gINT 11,8 ± 4,3 e 8,0 ± 3,5. Houve diferença significativa (p<0,05) entre os leucócitos e linfócitos, quando confrontados os grupos gTB (valores menores) e gLEB (valores maiores) com o grupo gNEG, enquanto o grupo gINT não diferiu (p>0,05) em nenhum dos parâmetros analisados em relação ao grupo gNEG. Conclui-se que o leucograma dos bovinos sofre influência da TB, devendo programas sanitários de combate à LEB em rebanhos leiteiros do estado de Pernambuco e que incluam a leucometria como ferramenta epidemiológica estratégica preconizar a prévia tuberculinização dos rebanhos envolvidos, sendo descartados os bovinos que apresentarem positividade ao teste imunoalérgico.

Assessment of occurrence and diagnostic methods of viral diseases in cattle – viral diarrhoea (BVD), infectious bovine rhinotracheitis (IBR), rabies, enzootic bovine leukosis (EBL), and spongiform encephalopathy (BSE) – was carried out for the first time in Lithuania. It was established that viruses of rabies, infectious rhinotraheitis and viral diarrhoea are most widespread in the country. It was determined that occurrence of rabies in cattle is parallel with the infection of wildlife with rabies virus. Analysis of eradication programme of enzootic bovine leucosis was done. It revealed that only combined application of diagnostic and preventive measures allowed reducing the cattle infection up to 0.2%. Though bovine spongiform encephalopathy has not been recorded in Lithuania, it is feasible to implement its diagnostic and prevention programme. An overall financial analysis of expenditures on BSE and viral diseases diagnostics and control was for the first time done in Lithuania. It showed that BSE and EBL occupied the leading positions in the structure of expenditures on viral diseases. In 2001, expenditures on BSE investigations accounted for 76.68% and in 2004 for 86.74% of the total. Expenditures on EBL investigations relatively reduced from 86.98% in 2000 to 8.47% in 2004. During the time under consideration, expenditures on investigations of other viral diseases changed but little. It was determined that consistent and wide-scale preventive vaccination created... [to full text]