Infecção experimental de aves de postura (Gallus gallus domesticus) por cepas de Salmonella enterica sorovar Gallinarum (SG), SGNalr SGcobS e SGcobScbiA: Anatomopatologia, hemograma e perfil bioquímico sérico
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Data
2010-02-23
Autores
Garcia, Kleber Ormande [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Este trabalho objetivou avaliar a anatomopatologia, o hemograma e o perfil bioquímico sérico de aves de postura inoculadas por Salmonella Gallinarum (SG) contendo os genes cobS e cbiA inoperantes (SGcobScbiA) que mostrou ser avirulenta em trabalhos anteriores, comparando-a com cepas virulentas SGNalr e SGcobS, para mostrar se SGcobScbiA pode ser componente de vacina contra cepas selvagens de SG e S.Enteritidis. 280 pintainhas foram distribuídas em 4 grupos (G); G1 (SGcobS), G2 (SGNalr), G3 (SGcobScbiA) e G4 (controle). Com exceção do G4, os grupos receberam 0,2 mL de suas respectivas cepas contendo aproximadamente 108 UFC/mL de inóculo, aos 5 dias de idade. A eutanásia foi realizada 24h antes (1DAI) e após a inoculação (1DPI), e 3 (3DPI), 5 (5DPI), 7 (7DPI), 10 (10DPI) e 15 (15DPI) dias após a administração do inóculo, sacrificando-se, em cada momento, dez aves de cada grupo. As aves foram sacrificadas, obtendo-se amostras de sangue utilizadas para os exames hematológicos e bioquímicos. Fragmentos de fígado, baço, timo, bursa de Fabricius, rins e coração foram destinados aos exames histológicos. As aves inoculadas com a cepa SGcobS tiveram comportamento semelhante às aves inoculadas por SGNalr, porém com algumas respostas diferentes nos exames hematológicos e bioquímicos. As aves inoculadas com a cepa SGcobScbiA tiveram comportamento semelhante ao grupo controle, entretanto foi verificado alterações brandas em alguns parâmetros, mostrando que estudos futuros devem ser feitos, verificando se as alterações constatadas não irão interferir no desempenho de aves vacinadas com a cepa SGcobScbiA.
The aim of the present study was to evaluate anatomopathology, hemogram and blood serum components of commercial layers experimentally inoculated with SGcobScbiA, which is a Salmonella Gallinarum (SG) strain it shows attenuation of the virulence in previous research and it was compared with high virulence SGNalr and SGcobS strains in order to show if SGcobScbiA has potential to be use as a vaccine against SG and S. Enteritidis wild strains. 280 commercial layers were divided into 4 groups (G); G1 (SGcobS), G2 (SGNalr), G3 (SGcobScbiA) and G4 (control group). With exception of G4, all the other groups received 0,2 mL of their respective strain containing about 108 CFU/mL of the inoculum with five days of age. Birds were sacrificed 24 hours before (1DBI) and 24 hours after the inoculation (1DAI), and three (3DAI), five (5DAI), seven (7DAI) ten (10DAI), and fifteen (15DAI) days after the administration of the inoculum, slaughtering ten birds at a time in each group. Birds were submitted to euthanasia and blood samples were collected in order to make the hematological and blood serum components test. Samples of liver, spleen, thymus, bursa of Fabricius, kidneys and heart were collected for the histological test. The birds inoculated with SGcobS strain had similar behavior when compared with that ones who received SGNalr strain, however some different responses in the hematological and blood serum components were found. On the other hand, the birds inoculated with SGcobScbiA strain had similar behavior when compared with the control group, however, lower alterations in some parameters were found. Further studies must be done to verify if these alterations will not interfere in the performance of the vaccinate birds with SGcobScbiA strain.
The aim of the present study was to evaluate anatomopathology, hemogram and blood serum components of commercial layers experimentally inoculated with SGcobScbiA, which is a Salmonella Gallinarum (SG) strain it shows attenuation of the virulence in previous research and it was compared with high virulence SGNalr and SGcobS strains in order to show if SGcobScbiA has potential to be use as a vaccine against SG and S. Enteritidis wild strains. 280 commercial layers were divided into 4 groups (G); G1 (SGcobS), G2 (SGNalr), G3 (SGcobScbiA) and G4 (control group). With exception of G4, all the other groups received 0,2 mL of their respective strain containing about 108 CFU/mL of the inoculum with five days of age. Birds were sacrificed 24 hours before (1DBI) and 24 hours after the inoculation (1DAI), and three (3DAI), five (5DAI), seven (7DAI) ten (10DAI), and fifteen (15DAI) days after the administration of the inoculum, slaughtering ten birds at a time in each group. Birds were submitted to euthanasia and blood samples were collected in order to make the hematological and blood serum components test. Samples of liver, spleen, thymus, bursa of Fabricius, kidneys and heart were collected for the histological test. The birds inoculated with SGcobS strain had similar behavior when compared with that ones who received SGNalr strain, however some different responses in the hematological and blood serum components were found. On the other hand, the birds inoculated with SGcobScbiA strain had similar behavior when compared with the control group, however, lower alterations in some parameters were found. Further studies must be done to verify if these alterations will not interfere in the performance of the vaccinate birds with SGcobScbiA strain.
Descrição
Palavras-chave
Salmonella, Histopatologia, Tifo aviário, Mutante, Atenuação, Acute phase proteins, Attenuation, Fowl typhoid, Histopathology, Leukogram, Mutant
Como citar
GARCIA, Kleber Ormande. Infecção experimental de aves de postura (Gallus gallus domesticus) por cepas de Salmonella enterica sorovar Gallinarum (SG), SGNalr SGcobS e SGcobScbiA: Anatomopatologia, hemograma e perfil bioquímico sérico. 2010. viii, 77 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, 2010.