PESQUISA VETERINÁRIA BRASILEIRA

Abstract in English:

ABSTRACT.- Amoroso L., Baraldi-Artoni S.M., Soares N.M., Pinto F.R., Pacheco M.R., Sagula A.L., Alva J.C.R. & Amoroso P. 2015. [Influence of microbiological quality of drinking water in the intestinal morphology of broilers.] Influência da qualidade microbiológica da água de dessedentação na morfologia intestinal de frangos de corte. Pesquisa Veterinária Brasileira 35(1):80-88. Departamento de Morfologia e Fisiologia Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Campus de Jaboticabal, Rodovia de Acesso Paulo Donato Castellane s/n, Km 5, Jaboticabal, SP 14884-900, Brazil. E-mail: lizandra@fcav.unesp.br To evaluate if microbiological quality of drinking water has an effect on intestinal morphology of broilers, the weekly water consumption by them was verified, and microbiological analysis of water samples, scanning electron microscopy and small intestine histology of broilers treated with filtered and not filtered water was conducted. Chickens that ingested filtered water had access to fewer fecal microorganisms (2.52±0.99 Most Probable Number MPN of fecal coliforms and 1.17±1.25 MPN of Escherichia coli) compared to those who drank no filtered water (3.62±0.67 and 2.53±1.13 MPN). At 14, 21 and 45 days old, the duodenum, jejunum and ileum of 96 birds were sampled. After laboratory routine, samples preserved in glutaraldehyde were eletronmicrographed and evaluated by villous density, and the material maintained in Bouin’s solution was destinated to histological slides that were analyzed morphometrically. The duodenum of birds that ingested not filtered water had the highest density of villi in response to microbiological water quality. In intestinal morphometry, were observed that birds receiving not filtered water showed increase in intestinal crypts depth and presented larger villi compared with birds that ingested filtered water. It is cocluded that filtered water, offered to broilers in a life span of 45 days, favors the maintenance of intestinal integrity.

• Water quality intestinal integrity água integridade intestinal

Abstract in Portuguese:

RESUMO.- Amoroso L., Baraldi-Artoni S.M., Soares N.M., Pinto F.R., Pacheco M.R., Sagula A.L., Alva J.C.R. & Amoroso P. 2015. [Influence of microbiological quality of drinking water in the intestinal morphology of broilers.] Influência da qualidade microbiológica da água de dessedentação na morfologia intestinal de frangos de corte. Pesquisa Veterinária Brasileira 35(1):80-88. Departamento de Morfologia e Fisiologia Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Campus de Jaboticabal, Rodovia de Acesso Paulo Donato Castellane s/n, Km 5, Jaboticabal, SP 14884-900, Brazil. E-mail: lizandra@fcav.unesp.br Para avaliar se a qualidade microbiológica da água de dessedentação intervém na morfologia intestinal de frangos de corte, foram analisados o consumo semanal de água, a microbiologia de amostras de água, a microscopia eletrônica de varredura e a histologia do intestino delgado de frangos de corte tratados com água filtrada e não filtrada. Os frangos que ingeriram água filtrada tiveram acesso ao menor número de micro-organismos fecais (2,52±0,99 Número Mais Provável (NMP) de coliformes fecais e 1,17±1,25 NMP de Escherichia coli) em relação aos que ingeriram água não filtrada (3,62±0,67 NMP e 2,53±1,13 NMP). Aos 14, 21 e 45 dias de vida, foram colhidas amostras do duodeno, jejuno e íleo de 96 aves. Após rotina laboratorial, as amostras conservadas em glutaraldeído foram eletronmicrografadas e analisadas quanto à densidade de vilos e o material mantido em solução de Bouin foi destinado à confecção de lâminas histológicas que foram analisadas morfometricamente. O duodeno das aves que receberam água não filtrada apresentou maior densidade dos vilos em resposta à qualidade microbiológica da água. Na morfometria intestinal, observou-se que aves que receberam água não filtrada apresentaram aumento na profundidade das criptas intestinais e elevada altura das vilosidades em relação às aves que ingeriram água filtrada. Infere-se que a água filtrada, oferecida aos frangos de corte em um período de vida de 45 dias, favorece a manutenção da integridade intestinal.

Abstract in English:

ABSTRACT.- Moura A.B., Costa A.J., Jordão Filho S., Paim B.B., Pinto F.R. & Di Mauro D.C. 2007. Toxoplasma gondii in semen of experimentally infected swine. Pesquisa Veterinária Brasileira 27(10):430-434. Centro de Pesquisas em Sanidade Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP 14884-900, Brazil. E-mail: a2abm@cav.udesc.br Eight reproductive boars were divided into three groups and inoculated with Toxoplasma gondii [GI (n=3) 1.5x104 oocysts strain P; GII (n=3) 1.0x106 tachyzoites strain RH; and GIII (n=2) non-inoculated control]. Clinical, hematological, parasitemia and serological tests and studies of the parasite in the semen through bioassay and PCR, and in reproductive organs (Bioassay and immunohistochemical analyses) were conducted to evaluate the toxoplasmic infection. Blood and semen were collected on day -2, -1, 1, 3, 5, 7, 9, 11, 14 and weekly up to 84 days post-inoculation (DPI). No clinical or hematimetric alteration was observed in the boars. Parasitemia was detected in one boar inoculated with oocysts at the 7th DPI and in another boar infected with tachyzoites (GII) at the 3rd and 49th DPI. Serological tests revealed antibodies against T. gondii in animals inoculated with oocysts or tachyzoites at the 7th DPI with dilutions of 1:256 and 1:64, which reached peaks of 1:4096 at day 11 and 9, respectively. The bioassays revealed the presence of the parasite in semen samples of a boar inoculated with oocysts (GI) at 3, 49 and 56 DPI and from two boars infected with tachyzoites (GII), one animal at 5 and two animals at 49 days DPI. Mice inoculated with semen from the control group (GIII) remained serologically negative. PCR analysis showed T. gondii DNA in the semen of Boar 1 and Boar 3 inoculated with tachyzoites and oocysts, respectively. The immuno-histochemical tests showed T. gondii in the reproductive organs of Boar 1 and Boar 2, inoculated with tachyzoites and oocysts, respectively. These findings suggest the possible occurrence of venereal transmission of T. gondii in swine.

• Toxoplasmosis swine semen PCR bioassays

Abstract in Portuguese:

ABSTRACT.- Moura A.B., Costa A.J., Jordão Filho S., Paim B.B., Pinto F.R. & Di Mauro D.C. 2007. Toxoplasma gondii in semen of experimentally infected swine. Pesquisa Veterinária Brasileira 27(10):430-434. Centro de Pesquisas em Sanidade Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP 14884-900, Brazil. E-mail: a2abm@cav.udesc.br Eight reproductive boars were divided into three groups and inoculated with Toxoplasma gondii [GI (n=3) 1.5x104 oocysts strain P; GII (n=3) 1.0x106 tachyzoites strain RH; and GIII (n=2) non-inoculated control]. Clinical, hematological, parasitemia and serological tests and studies of the parasite in the semen through bioassay and PCR, and in reproductive organs (Bioassay and immunohistochemical analyses) were conducted to evaluate the toxoplasmic infection. Blood and semen were collected on day -2, -1, 1, 3, 5, 7, 9, 11, 14 and weekly up to 84 days post-inoculation (DPI). No clinical or hematimetric alteration was observed in the boars. Parasitemia was detected in one boar inoculated with oocysts at the 7th DPI and in another boar infected with tachyzoites (GII) at the 3rd and 49th DPI. Serological tests revealed antibodies against T. gondii in animals inoculated with oocysts or tachyzoites at the 7th DPI with dilutions of 1:256 and 1:64, which reached peaks of 1:4096 at day 11 and 9, respectively. The bioassays revealed the presence of the parasite in semen samples of a boar inoculated with oocysts (GI) at 3, 49 and 56 DPI and from two boars infected with tachyzoites (GII), one animal at 5 and two animals at 49 days DPI. Mice inoculated with semen from the control group (GIII) remained serologically negative. PCR analysis showed T. gondii DNA in the semen of Boar 1 and Boar 3 inoculated with tachyzoites and oocysts, respectively. The immuno-histochemical tests showed T. gondii in the reproductive organs of Boar 1 and Boar 2, inoculated with tachyzoites and oocysts, respectively. These findings suggest the possible occurrence of venereal transmission of T. gondii in swine.