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Featured researches published by Regiani Nascimento Gagno Pôrto.


Tropical Animal Health and Production | 2009

Granular Vulvovaginitis Syndrome in Nelore pubertal and post pubertal replacement heifers under tropical conditions: role of Mycoplasma spp., Ureaplasma diversum and BHV-1.

M. L. Gambarini; T. L. Kunz; B. D. Oliveira Filho; Regiani Nascimento Gagno Pôrto; C.M.G. Oliveira; W. M. E. D. Brito; Marco Antônio de Oliveira Viu

In order to determine the role of Mycoplasma spp, Ureaplasma diversum and BHV-1 as causal agents of Granular Vulvovaginitis Syndrome in Nelore heifers raised under tropical conditions and based on the hypothesis that stressful conditions during puberty or breeding season would be a determinant factor for the infection, 340 heifers not vaccinated against BHV-1 were divided in Post-pubertal, in the beginning of the first breeding season, and Pubertal heifers. The vaginal lesion score (VLS) Grade 1 to 4 was giving according to lesion area and severity. Vaginal mucus was used to isolate Mycoplasma spp., Ureaplasma diversum and BHV-1. The predominant VLS was 2. No sample was positive for BHV-1; 48% were positive for Mycoplasma spp., Ureaplasma diversum, or both, with predominance of Ureaplasma diversum. Serum neutralization for BHV-1 showed more positive animals in pubertal group (23%); 3 of the paired sera demonstrated seroconversion. These data indicated that post-pubertal and pubertal Nelore heifers raised under extensive conditions are more susceptible to Mycoplasma spp. and Ureaplasma diversum. The hypothesis that the stress of pubertal period could lead to an acute vaginal infection by HBV-1 was not proofed.


Ciencia Rural | 2003

Aspectos físicos químicos e microbiológicos da urina de matrizes suínas descartadas

Regiani Nascimento Gagno Pôrto; Jurij Sobestiansky; Moema Pacheco; Chediak Matos; Maria Lúcia Gambarini

The present study describes the physical-chemical alterations of the urine and identifies etiological agents of the urine of 35 sows. Out of 35 samples, 16 (45.7%) were positive for nitrite and/or blood, positive for urinary infection (UI); eight (50%) were dark yellow and six (37.5%) had clear yellow coloration; in two (12.5%) samples did not show any alteration. Ten samples had ammonia smell, seven among them were positive for UI. Other findings were turbid urine and turbid with grumes, normal pH values (5.5 – 6.5) and densities higher than 1012. Microorganisms were isolated in 91.5% out of 35 urine samples, with prevalence of Escherichia coli (45.7%). In 11 samples (31.4%) Actinobaculum suis was isolated, four were simultaneously positive for UI and Actinobaculum suis; seven were negative for UI, but it was observed the presence of Actinobaculum suis in the indirect immunofluorescence.


Italian Journal of Animal Science | 2013

Liver function and bacteriology of organs in broiler inoculated with nalidixic acid-resistant Salmonella Typhimurium and treated with organic acids

Tatiane Martins Rocha; Maria Auxiliadora Andrade; Elisabeth Gonzales; José Henrique Stringhini; Eliete Souza Santana; Regiani Nascimento Gagno Pôrto; Cíntia Silva Minafra-Rezende

An experiment was carried out with 630 one day-old chicks to evaluate the effects of organic acids when birds were experimentally inoculated with Salmonella Typhimurium. Liver damage and the persistence of the bacterium in the organs were evaluated as well. Broilers were distributed in a completely randomised experimental design in a 3×2 factorial arrangement of six treatments with seven replicates of 15 birds each. Birds were inoculated with saline solution or the bacterium via gavage at 1 day of age, or were offered a feed containing or not the organic acid blend for the period of 7 to 14 days of age. A dose of 5.0x102 colony-forming units (CFU)/0.5 mL of Salmonella Typhimurium was used for inoculation both via gavage and feed. The parameters evaluated are weight, liver histopathology, liver and serum biochemistry, and bacteriological analyses of the caeca, crop, spleen, and liver and heart pool. At 21 and 28 days of age, the liver of the non-inoculated groups was significantly lighter as compared to the other treatments. Birds fed organic acids presented lower bacterial isolation rates in all organs tested. Birds inoculated in the crop and treated with organic acids presented lower E. coli CFU counts (P<0.05). Birds inoculated with Salmonella presented significant changes (P<0.05) in liver enzymes, as detected by serum biochemistry, and in liver histopathology. It was concluded that organic acids effectively controlled Salmonella Typhimurium and did not cause any liver damage.


Revista Brasileira De Zootecnia | 2011

Performance and intestinal health of broilers inoculated with nalidixic acid-resistant Salmonella Typhimurium and treated with organic acids

Tatiane Martins Rocha; Maria Auxiliadora Andrade; Eliete Silva e Souza; José Henrique Stringhini; Marcos Barcellos Café; Cíntia Silva Minafra e Rezende; Regiani Nascimento Gagno Pôrto

An experiment with 630 one-day-old chicks experimentally inoculated with Salmonella Typhimurium was performed to evaluate the effects of an organic acid blend (benzoic, fumaric and 2-hydroxi-4-methylltio-butanoic - HMTBa) on intestinal health and performance. The experimental challenge with Salmonella Typhimurium occurred in two different routes of administration: via crop on the first day after hatching, and via feed, offered from seven to 14 days of age. These groups were treated with organic acids in a 3 × 2 (agent versus acid) factorial arrangement. Chicks treated with organic acids had higher weight gain, mean live weight and better feed conversion at 14 days of age, and higher weight gain at 28 days of age. Chicks treated with organic acids inoculated via crop had higher duodenum villi height than animals of the control group. Jejunum villi were higher in chicks of the negative control group compared with birds supplemented with organic acids. Small intestine pH in chicks of the inoculated group was lower compared with control group throughout the trial period. HMTBa acid in the dosage of 0.4% improves intestinal health and performance when nalidixic acid resistant Salmonella Typhimurium is experimentally inoculated.


Anais Da Academia Brasileira De Ciencias | 2017

Assessment of cow and farm level risk factors associated with Ureaplasma diversum in pasture-based dairy systems - A field study

Josefa M. Nascimento-Rocha; Benedito Dias de Oliveira Filho; Emannuel Arnhold; Regiani Nascimento Gagno Pôrto; Svetlana F. Lima; Maria Lúcia Gambarini

Potential risk factors for Ureaplasma diversum in the vaginal mucus of 1,238 dairy cows were included in a multivariate logistic regression model, based on the cow level (i.e., granular vulvovaginitis [+GVV], yearly milk production [4500 kg or more], pregnancy, predominance of Bos taurus [+Bos Taurus], score of corporal condition [at least 2.5], concomitant positivity for Escherichia coli [+E.coli]), and farm level i.e., milking room hygiene (-Milking room), dunghill location, and replacement female). Ureaplasma diversum was present in 41.1% of the samples. Independent risk factors for U. diversum were +GVV (odds ratio [OR], 1.31); +Mycoplasma spp (OR, 5.67); yearly milk production (4500 kg or more) (OR, 1.99); +Bos taurus (OR, 1.68); +E. coli (OR, 4.96); -milking room (OR, 2.31); and replacement females (OR, 1.89). Ureaplasma diversum vaginal colonization was strongly associated with Mycoplasma spp., E. coli, and number of pregnant cows.


Ciência Animal Brasileira | 2006

ASPECTOS HISTOPATOLÓGICOS DO SISTEMA URINÁRIO DE MATRIZES SUÍNAS DESCARTADAS

Regiani Nascimento Gagno Pôrto; Jurij Sobestiansky; Moema Pacheco Chediak Matos; Maria Lúcia Gambarini Meirinhos


Ciência Animal Brasileira | 2006

OCORRÊNCIA DE ANTICORPOS PARA Brucella sp. EM SOROS DE MATRIZES SUÍNAS DE GRANJAS QUE ABASTECEM O MERCADO CONSUMIDOR DE GOIÂNIA, ESTADO DE GOIÁS, BRASIL

Moema Pacheco Chediak Matos; Jurij Sobestiansky; Regiani Nascimento Gagno Pôrto; Maria Lúcia Gambarini Meirinhos


Archives of Veterinary Science | 2005

ISOLAMENTO DO Ureaplasma diversum EM MUCO VULVOVAGINAL DE VACAS LEITEIRAS REPETIDORAS DE ESTRO NO ESTADO DE ALAGOAS BRASIL

B.D. Oliveira Filho; Regiani Nascimento Gagno Pôrto; M. L. Gambarini; T. L. Kunz; Henrique Trevizoli Ferraz; Marco Antônio de Oliveira Viu; D. T. Lopes; A.P.F. Sousa


Tropical Animal Health and Production | 2013

Ovarian evaluation of Girolando (Holstein × Gir) heifers submitted to a GnRH–PGF2α–GnRH protocol in the dry or rainy seasons in the tropical savannah

Ubirajara O. Bilego; Fabricio C. Santos; Regiani Nascimento Gagno Pôrto; Bruno Carlos Pires; Benedito Dias de Oliveira Filho; Marco Antônio de Oliveira Viu; Maria Lúcia Gambarini


Tropical Animal Health and Production | 2017

Effects of calving season on the voluntary waiting period and reproductive performance of Holstein cows in the tropical savannah

Thiago V. Silva; Benner Geraldo Alves; Kele A. Alves; Regiani Nascimento Gagno Pôrto; Maria Lúcia Gambarini

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Maria Lúcia Gambarini

Universidade Federal de Goiás

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Jurij Sobestiansky

Concordia University Wisconsin

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M. L. Gambarini

Francisco Gavidia University

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