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Serological response to rabies virus induced by commercial vaccines in cattle
by
Martins, Mathias
, Weiblen, Rudi
, Flores, Eduardo Furtado
, Quadros, João Motta de
in
AGRONOMY
/ Aluminum
/ Animals
/ Antibodies
/ Antibody response
/ Cattle
/ Epidemics
/ Immune response
/ Immunization
/ Neutralizing
/ neutralizing antibodies
/ Rabies
/ Serology
/ Vaccines
/ Viruses
2017
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Serological response to rabies virus induced by commercial vaccines in cattle
by
Martins, Mathias
, Weiblen, Rudi
, Flores, Eduardo Furtado
, Quadros, João Motta de
in
AGRONOMY
/ Aluminum
/ Animals
/ Antibodies
/ Antibody response
/ Cattle
/ Epidemics
/ Immune response
/ Immunization
/ Neutralizing
/ neutralizing antibodies
/ Rabies
/ Serology
/ Vaccines
/ Viruses
2017
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While trying to remove the title from your shelf something went wrong :( Kindly try again later!
Do you wish to request the book?
Serological response to rabies virus induced by commercial vaccines in cattle
by
Martins, Mathias
, Weiblen, Rudi
, Flores, Eduardo Furtado
, Quadros, João Motta de
in
AGRONOMY
/ Aluminum
/ Animals
/ Antibodies
/ Antibody response
/ Cattle
/ Epidemics
/ Immune response
/ Immunization
/ Neutralizing
/ neutralizing antibodies
/ Rabies
/ Serology
/ Vaccines
/ Viruses
2017
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Serological response to rabies virus induced by commercial vaccines in cattle
Journal Article
Serological response to rabies virus induced by commercial vaccines in cattle
2017
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Overview
The antibody response to rabies virus (RABV) induced by commercial vaccines in heifers was investigated. For this, 84 heifers were vaccinated twice (30 days interval) with each of four vaccines (G1 = 14 animals; G2 = 24; G3 = 22 and G4 = 24) and received a booster vaccination 360 days later. Serum samples collected at different intervals after vaccination and 30 days after booster were submitted to a virus neutralizing (VN) assay for RABV antibodies. Thirty days after the second vaccine dose, 92% of the immunized animals presented VN titers ≥0.5UI/mL (geometric medium titers [GMT] 1.7 to 3.8UI/mL). At the day of the booster (360 days post-vaccination); however, the percentage of animals harboring antibody titers ≥0.5UI/mL had dropped to 31% (0-80% of the animals, depending on the vaccine), resulting in lower GMT (0.1 to 0.6UI/mL). Booster vaccination at day 360 resulted in a detectable anamnestic response in all groups, resulting in 83% of animals (65 to 100%) harboring VN titers ≥0.5UI/mL thirty days later (GMT 0.6 to 4.3UI/mL). These results indicated that these vaccines were able to induce an adequate anti-RABV response in all animals after prime vaccination (and after booster as well). However, the titers decreased, reaching titers <0.5UI/mL in approximately 70% of animals within the interval before the recommended booster. Thus, booster vaccination for rabies in cattle using the current vaccines should be performed before the recommended one-year interval, as to maintain neutralizing antibodies levels in most vaccinated animals. RESUMO: A resposta sorológica contra o vírus da raiva (RABV) induzida por vacinas comerciais foi investigada em bovinos. Para isso, 84 novilhas foram vacinadas duas vezes (30 dias de intervalo) com cada vacina (G1 = 14 animais; G2 = 24; G3 = 22 e G4 = 24) e receberam uma vacinação de reforço 360 dias depois. Amostras de soro coletadas em diferentes momentos após a vacinação e após o reforço vacinal foram submetidas ao teste de vírus neutralização (VN) para detecção de anticorpos contra o RABV. Trinta dias após a segunda dose vacinal, 92% dos animais apresentaram títulos neutralizantes ≥0,5UI/mL (GMT 1,7 a 3,8UI/mL). Porém, no dia do reforço (360 dias pós-vacinação), a porcentagem de animais que ainda apresentava títulos ≥0,5UI/mL havia se reduzido a 31% dos animais (0 a 80%, dependendo da vacina), resultando em baixos TMGs (0,1 a 0,6UI/mL). A vacinação de reforço no dia 360 resultou em resposta anamnéstica em todos os grupos, resultando em 83% (65 a 100%) de animais com títulos VN ≥0,5UI/mL trinta dias após (GMT 0,6 a 4,3UI mL-1). Esses resultados indicam que as vacinas avaliadas induzem uma resposta adequada de anticorpos anti-RABV após a vacinação (e também após o reforço). No entanto, os títulos reduzem-se, atingindo níveis <0,5UI/mL em 70% dos animais durante o intervalo antes do reforço. Assim, vacinação de reforço contra a raiva em bovinos, utilizando-se as vacinas atuais, deve ser realizada em intervalo inferior a um ano, de forma a manter os níveis de anticorpos neutralizantes na maioria dos animais.
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