Frequência De Anticorpos Contra Metapneumovírus Aviário Em Criações Industriais E De Galinhas De Quintal No Pólo Avícola Da Bahia.

Sales, Tatiane Santana; Herval, Elen Fabiane Guimarães; Silva, Priscila Sousa da; Lima, J. M. de; Ramos, Izabella; Fernandes, Lia Muniz Barretto

doi:10.5216/cab.v11i3.6800

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…Studies published in Brazil have reported seroconversion in unvaccinated poultry, proving that the agent is present in industrial farms (Peres et al, 2006) and in free-range poultry (Sales et al, 2010). In any case, this serological profile observed in study 2 indicates the excellent ability of vaccines to produce protection, since the appearance of clinical signs of the disease was not observed at any time during the study.…”

Section: Evaluation Of the Performance Of A New Pentavalent Vaccine I...mentioning

confidence: 57%

Evaluation of the Performance of a New Pentavalent Vaccine in Poultry

Muniz,

Freitas,

Godoi

et al. 2024

Braz. J. Poult. Sci.

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Viral inactivated vaccines play a fundamental role in animal heath, both for individual protection and for the induction of antibodies that will be passively transmitted to the progeny. Depending on the field challenges, it is eventually necessary to combine more than one etiology. Inactivated polyvalent vaccines with appropriate combinations to ensure adequate and balanced responses may induce a satisfactory and long-lasting immune response. This study aimed to evaluate the antibody responses of a new oil-based inactivated pentavalent viral vaccine for intramuscular administration containing a newly developed immunomodulator, and compare it with conventional vaccines through antibody responses to the same antigens by ELISA in successive weeks after administration. Mortality rate, weight gain, egg production and hatching were also determined to evaluate safety. The results obtained revealed significant differences (p<0.05) between the group that received the new vaccine and the control group, presenting persistent and long-lasting IgG (IgY) antibodies in specific pathogen free (SPF) chickens for 146 days. In addition, there was a statistically significant (p<0.05) difference in the serological response of the new pentavalent vaccine in commercial poultry in relation to the monovalent commercial vaccines for infectious bronchitis, avian metapneumovirus, Newcastle disease, Gumboro, and reovirus fractions. There was no change in the productive parameters evaluated when compared to the conventional vaccine or the control.

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Section: Evaluation Of the Performance Of A New Pentavalent Vaccine I...mentioning

confidence: 57%

Evaluation of the Performance of a New Pentavalent Vaccine in Poultry

Muniz,

Freitas,

Godoi

et al. 2024

Braz. J. Poult. Sci.

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show abstract

“…The high seroprevalence found in this study, 77% of the birds and 89.5% of properties, shows the virus spread in the region and corroborates with other studies. In a study performed in a poultry hearing area in Bahia, Brazil, 77.1% of commercial flocks and 94.12% of backyard flocks surveyed were seropositive for aMPV, Sales et al (2010). We found that the variation coefficient for aMPV within properties ranged from 47.53% to 340%; a high variation coefficient within the same farm could be explained by the diversity of the age of the poultry reared in the same place.…”

Section: Discussionmentioning

confidence: 68%

Circulation of Major Respiratory Pathogens in Backyard Poultry and their Association with Clinical Disease and Biosecurity

Batista

Hoepers

Silva

et al. 2020

Braz. J. Poult. Sci.

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Raising backyard birds is a common practice in Brazil, mainly in the countryside or suburban areas. However, the level of respiratory pathogens in these animals is unknown. We sampled two hundred chickens from 19 backyard flocks near commercial poultry farms and performed ELISA to Infectious Bronchitis Virus, avian Metapneumovirus, Mycoplasma synoviae and Mycoplasma gallisepticum. We evaluated the association between the predictive ability of ELISA and Hemagglutination-inhibition (HI)by comparing results from eight flocks positive to Mycoplasma gallisepticum on ELISA. Besides, we assessed essential biosecurity measures in the properties (multiple species birds, rodent control, hygienic conditions, and water quality for the bird`s consumption). We could access the vaccination program only on four properties; in three of them, the birds were supposedly vaccinated for IBV. Overall the properties had a poor score for the biosecurity measures, and the seroprevalence in backyard poultry flocks for IBV, a MPV, MS, and MG were respectively 87.5% (14/16), 89.5% (17/19), 100 (19/19) and MG 84.21% (16/19). We found low specificity and predictive value between ELISA and HI in MG analysis and a positive correlation between the presence of clinical symptoms and mean MG titers. Backyard chicken are pathogens' reservoirs and pose a risk for the commercial poultry farms in the region, and further efforts of the governmental entities and private sector of poultry production should consider these information to avoid future economic losses.

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Frequência De Anticorpos Contra Metapneumovírus Aviário Em Criações Industriais E De Galinhas De Quintal No Pólo Avícola Da Bahia.

Cited by 2 publications

References 15 publications

Evaluation of the Performance of a New Pentavalent Vaccine in Poultry

Evaluation of the Performance of a New Pentavalent Vaccine in Poultry

Circulation of Major Respiratory Pathogens in Backyard Poultry and their Association with Clinical Disease and Biosecurity

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