Resultado da pesquisa (3)
Termo utilizado na pesquisa Spohr K.A.H.
#1 - Risk factors associated to the prevalence of anti-Sarcocystis neurona, Neospora spp. and Toxoplasma gondii antibodies in horses from Roraima, Brazilian Amazon
Abstract in English:
Samples of 303 horses from 56 ranches of Rorainópolis municipality, state of Roraima, were evaluated by means of the Indirect Immunofluorescence Test (IFAT) to detect antibodies against Sarcocystis spp., Toxoplasma gondii and Neospora spp. A subset of positive sample (n=15) against Sarcocystis spp. was evaluated by Western Blotting (WB) with crude antigen of S. neurona. From the serological result, possible risk factors were evaluated against individual or farming variables. The prevalence of anti-Sarcocystis spp. antibodies was estimated to be 43.2% (37.6-49.0%), anti-Neospora sp. was 26.7% (21.9-32.2%), and anti-T. gondii was 18.5% (14.3-23.4%). Fourteen samples (14/15) evaluated by WB were positive for S. neurona antigens. From the ranches, 76.8% (43/56) presented at least one positive horse for Sarcocystis spp., 69.6% (39/56) for Neospora spp., and 55.4% (31/56) for T. gondii. Thirteen (14.3%) horses had antibodies against all agents, 50 (16.5%) had antibodies against Sarcocystis spp. and Neospora spp., 10 (3.3%) for Neospora spp. and T. gondii, and eight (2.6%) for Sarcocystis spp. and T. gondii. Associated variables (P≤0.05) for antibodies against Neospora spp. were not found in horses fed on rented pastures, not in horses without veterinary assistance and stables, and not in herds up to 5 horses; while they were associated for T. gondii by contact with cats, in the Lavradeiro breed with use of stables, in horses raise with cattle, and in herds up to 5 horses. There were no variables associated with the presence of antibodies against S. neurona. Antibodies against S. neurona, Neospora spp. and T. gondii were reported in horses from the state of Roraima, Northern Brazilian Amazon, highlighting to the elevate prevalence on ranches.
Abstract in Portuguese:
Amostras de sangue de 303 equinos provenientes de 56 propriedades do município de Rorainópolis, Roraima, foram avaliadas por Reação de Imunofluorescência Indireta (RIF) para pesquisa de anticorpos contra Sarcocystis neurona, Toxoplasma gondii e Neospora spp. Algumas amostras de soros positivos para Sarcocystis spp. foram avaliadas pelo Western Blotting (WB) utilizando antígenos crus de S. neurona. A partir dos resultados sorológicos, possíveis fatores de risco foram avaliados frente a variáveis individuais e de propriedade. A prevalência de anticorpos anti-Sarcocystis spp. foi estimada em 43,2% (37,6-49,0%), anti-Neospora sp. em 26,7% (21,9-32,2%) e anti-T. gondii de 18,5% (14,3-23,4%). Quatorze amostras (14/15) testadas por WB resultaram positivas para antígenos de S. neurona. Das propriedades, 76,8% (43/56) apresentaram pelo menos um equino positivo para Sarcocystis spp.; 69,6% (39/56) para Neospora spp. e 55,4% (31/56) para T. gondii. Dos equinos, 13 (4,3%) apresentarem anticorpos para os três agentes, 50 (16,5%) para Sarcocystis spp. e Neospora spp., 10 (3,3%) para Neospora spp. e T. gondii, e oito (2,6%) para Sarcocystis spp. e T. gondii. As variáveis associadas (P≤0,05) à presença de anticorpos foram: para Neospora spp. não pastejar em áreas alugadas, ausência de assistência veterinária na propriedade, sexo masculino, não estabular animais e plantel equino acima de 5 animais; enquanto para T. gondii foram o contato com felinos, animais da raça lavradeiro, animal estabulado, criação de bovinos na propriedade e plantel equino acima de 5 animais. Não houveram variáveis associadas a presença de anticorpos contra S. neurona. Relata-se no presente estudo a primeira detecção de anticorpos anti-S. neurona, Neospora spp. e T. gondii em equinos do estado de Roraima, localizado na Amazônia Setentrional Brasileira, ressaltando para a elevada frequência de fazendas com equinos soropositivos.
#2 - Prevalence and risk factors for Leptospira spp. in cattle herds in the south central region of Paraná state, 32(2):99-105
Abstract in English:
ABSTRACT.- Hashimoto V.Y., Dias J.A., Spohr K.A.H., Silva M.C.P., Andrade M.G.B., Müller E.E. & Freitas, J.C. 2012. [Prevalence and risk factors for Leptospira spp. in cattle herds in the south central region of Paraná state.] Prevalência e fatores de risco associados à Leptospira spp. em rebanhos bovinos da região centro-sul do estado do Paraná. Pesquisa Veterinária Brasileira 32(2):99-105. Departamento de Medicina Veterinária Preventiva, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid 380, Cx. Postal 6001, Londrina, PR 86051-990, Brazil. E-mail: freitasj@uel.br
The aim of this study was to determine the prevalence of anti-Leptospira spp. antibodies and the risk factors for Leptospira spp. infection in breeding cattle herds in the south central region of Paraná state. It was based on the statistic delineation, serological samples and information regarding the selected farms employed in the study of bovine brucellosis for Paraná state in the context of National Program for Control and Eradication of Brucellosis and Tuberculosis. A total of 1.880 females aged ≥24 months from 274 non vaccinated herds were studied. Serum samples were tested for antibodies against Leptospira spp. using microscopic agglutination test (MAT) with 22 Leptospira serovars. The epidemiological questionnaire was applied on all the selected farms and aimed to obtain epidemiological data. Hundred eighty one of 274 herds were positive for Leptospira spp., presenting prevalence of positive herds of 66.06% (IC95%=60.12-71,65%). Presence of ≥43 cattle (OR=3.120; IC=1.418-6.867), animal purchase (OR=2.010; IC=1.154-3.500), rent of pastures (OR=2.925; IC=1.060-8.068) and presence of maternity paddock (OR=1.981; IC=1,068-3,676) were identified as risk factors for leptospirosis due to any serovar in the multivariate logistic regression. Risk factors for leptospirosis due to serovar Hardjo were presence of ≥43 cattle (OR=3.622; IC=1.512-8,677), animal purchase (OR=3.143; IC=1.557-6.342), rent of pastures (OR=4.070; IC=1.370-12.087) and presence of horses (OR=2.981; IC=1.321-6.726). These results indicate that Leptospira spp. infection is widespread in the south central region of Paraná state and that factors related to the herd characteristic and management are associated with the infection.
Abstract in Portuguese:
RESUMO.- Hashimoto V.Y., Dias J.A., Spohr K.A.H., Silva M.C.P., Andrade M.G.B., Müller E.E. & Freitas, J.C. 2012. [Prevalence and risk factors for Leptospira spp. in cattle herds in the south central region of Paraná state.] Prevalência e fatores de risco associados à Leptospira spp. em rebanhos bovinos da região centro-sul do estado do Paraná. Pesquisa Veterinária Brasileira 32(2):99-105. Departamento de Medicina Veterinária Preventiva, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid 380, Cx. Postal 6001, Londrina, PR 86051-990, Brazil. E-mail: freitasj@uel.br
O objetivo deste trabalho foi determinar a prevalência de anticorpos anti-Leptospira spp e os fatores de risco associados à infecção em rebanhos bovinos com atividade reprodutiva da região centro-sul do estado do Paraná. Foram utilizados o delineamento estatístico, as amostras sorológicas e as informações referentes às propriedades empregadas no estudo da brucelose bovina no estado do Paraná dentro do Contexto do Programa Nacional de Controle e Erradicação da Brucelose e Tuberculose. Foram estudadas 1.880 fêmeas com idade igual ou superior a 24 meses, provenientes de 274 rebanhos não vacinados contra a Leptospira spp. Para o diagnóstico sorológico da infecção foi utilizada a prova de soroaglutinação microscópica (SAM) com 22 sorovares de Leptospira spp. Em cada propriedade foi aplicado um questionário epidemiológico, a fim de obter informações epidemiológicas e práticas de manejo empregadas. Dos 274 rebanhos analisados, 181 foram considerados positivos para a Leptospira spp., com a prevalência de rebanhos de 66,06% (I.C.95%=60,12-71,65%). Presença de ≥ 43 bovinos (OR=3,120; I.C=1,418-6,867), compra de reprodutores (O.R=2,010; I.C=1,154-3,500), aluguel de pasto (O.R=2,925; I.C=1,060-8,068), presença de piquete de parição (O.R=1,981; I.C=1,068-3,676) foram identificados como fatores de risco para a infecção para qualquer sorovar de Leptospira spp. na análise de regressão logística multivariada. Os fatores de risco para a infecção pelo sorovar Hardjo foram presença de ≥43 bovinos (O.R=3,622; I.C=1,512-8,677), compra de reprodutores (O.R=3,143; I.C=1,557-6,342), aluguel de pasto (O.R=4,070; I.C=1,370-12,087) e presença de eqüinos (O.R=2,981; I.C=1,321-6,726). Estes resultados indicam que a infecção pela Leptospira spp está amplamente distribuída na região centro-sul do estado do Paraná e que fatores elacionados às características das propriedades e ao manejo estão associados à infecção.
#3 - Prevalência de anticorpos anti-Chlamydophila spp. em propriedades rurais com histórico de aborto bovino no estado do Paraná, p.215-219
Abstract in English:
ABSTRACT.- Silva-Zacarias F.G., Spohr K.A.H., Lima B.A.C., Dias J.A., Müller E.E., Ferreira Neto J.S., Turilli C. & Freitas J.C. 2009. [Prevalence of antibodies against Chlamydophila spp. in herds with bovine abortion of Paraná state, Brazil.] Prevalência de anticorpos anti-Chlamydophila spp. em propriedades rurais com histórico de aborto bovino no estado do Paraná. Pesquisa Veterinária Brasileira 29(3):215-219. Departamento de Medicina Veterinária Preventiva, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid 380, Cx. Postal 6001, Londrina, PR 86051-990, Brazil. E-mail: freitasj@uel.br
Chlamydophila abortus is a recognized cause of bovine epizootic abortion. Abortion, premature birth and weak lamb/calf, stillbirth and repeat breeding in irregular intervals are the most frequent disease manifestations. The complement fixation test is the recommended by the World Organization of Animal Health (OIE) for Chlamydophila spp. serologic diagnosis. The aim of this study was estimate the prevalence of antibodies against Chlamydophila spp. in cattle herds with abortion, selected inside the sampling design of National Program of Control and Erradication of Brucellosis in Paraná state. Serum samples of 3,102 cows (age ³ 24 months) from 373 herds were analyzed by complement fixation test. Totally, 44 (1.42%) animal were positive with titers ³ 32. The seroprevalence of Chlamydophila spp. in the herds was 8.82% (6.15%-12.17%). Four variables were associated with seroprevalence for Chlamydophila spp. in the final model of logistic regression: confined or semi-confined breeding (OR=3.339, P=0.004), farms with less than 35 cows (OR=3.339, P=0.017), abortion in the pasture (OR=2.372, P=0.037) and pasture rent (OR=3.398, P=0.006) were risk factors for Chlamydophila spp. This bacterium infected a small number of cattle from herds with abortion in Paraná state. Chlamydophila spp impact as abortion cause is reduced in this state.
Abstract in Portuguese:
ABSTRACT.- Silva-Zacarias F.G., Spohr K.A.H., Lima B.A.C., Dias J.A., Müller E.E., Ferreira Neto J.S., Turilli C. & Freitas J.C. 2009. [Prevalence of antibodies against Chlamydophila spp. in herds with bovine abortion of Paraná state, Brazil.] Prevalência de anticorpos anti-Chlamydophila spp. em propriedades rurais com histórico de aborto bovino no estado do Paraná. Pesquisa Veterinária Brasileira 29(3):215-219. Departamento de Medicina Veterinária Preventiva, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid 380, Cx. Postal 6001, Londrina, PR 86051-990, Brazil. E-mail: freitasj@uel.br
Chlamydophila abortus is a recognized cause of bovine epizootic abortion. Abortion, premature birth and weak lamb/calf, stillbirth and repeat breeding in irregular intervals are the most frequent disease manifestations. The complement fixation test is the recommended by the World Organization of Animal Health (OIE) for Chlamydophila spp. serologic diagnosis. The aim of this study was estimate the prevalence of antibodies against Chlamydophila spp. in cattle herds with abortion, selected inside the sampling design of National Program of Control and Erradication of Brucellosis in Paraná state. Serum samples of 3,102 cows (age ³ 24 months) from 373 herds were analyzed by complement fixation test. Totally, 44 (1.42%) animal were positive with titers ³ 32. The seroprevalence of Chlamydophila spp. in the herds was 8.82% (6.15%-12.17%). Four variables were associated with seroprevalence for Chlamydophila spp. in the final model of logistic regression: confined or semi-confined breeding (OR=3.339, P=0.004), farms with less than 35 cows (OR=3.339, P=0.017), abortion in the pasture (OR=2.372, P=0.037) and pasture rent (OR=3.398, P=0.006) were risk factors for Chlamydophila spp. This bacterium infected a small number of cattle from herds with abortion in Paraná state. Chlamydophila spp impact as abortion cause is reduced in this state.
