Epidemiological characterization and risk evaluation associated with the presence of Megninia spp. in posture farms/Caracterizacao epidemiologica e avaliacao de risco associados a presenca de Megninia spp. em granjas de postura
This study was accomplished with the aim to evaluate and to characterize the risks for the presence of Megninia spp. in poultry farms from Minas Gerais, using for that Correspondence Analysis (CA). A secondary database was used and adapted for this study, with information from 402 chicken houses of...
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Published in: | Ciência rural Vol. 47; no. 9 |
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Main Authors: | , , , , , , , |
Format: | Journal Article |
Language: | Spanish |
Published: |
Universidade Federal de Santa Maria
01-09-2017
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Subjects: | |
Online Access: | Get full text |
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Summary: | This study was accomplished with the aim to evaluate and to characterize the risks for the presence of Megninia spp. in poultry farms from Minas Gerais, using for that Correspondence Analysis (CA). A secondary database was used and adapted for this study, with information from 402 chicken houses of 42 laying hens commercial properties. Variables used to compose the correspondence model were selected through tests of Qui-square being considered the significant result of P [less than or equal to] 0,05. A risk index was built to the presence of Megninia spp. starting from variables considered as risk factors for the presence of those ectoparasites. The CA graph produced for the epidemiological characterization of the presence of Megninia spp. presented an accumulated qui -square value of 58,55%. There was an association of the risk index with the age ranges of the poultry, among the presence Megninia spp. and the use of mineral oil and acaricide in the ration and; finally, an association between the ruddy ground-dove (Columbina talpacoti) presence and the absence of mites of the Megninia genus. The results supply knowledge on the epidemiology of Megninia spp. In addition, these information can contribute in the decision, reducing the risks of possible infestations in poultry farms and the negative effects of that parasitism. Key words: Megninia spp., risk index, correspondence analysis. Este estudo foi realizado com o objetivo de avaliar e caracterizar os riscos para a presenca de Megninia spp. em galpoes de granjas de postura de Minas Gerais, utilizando para isso Analise de Correspondencia (AC). Foi utilizado um banco de dados secundario e adaptado para este estudo, com informacoes de 402 galpoes de 42 propriedades comerciais de galinhas poedeiras. As variaveis utilizadas para compor o modelo de correspondencia foram selecionadas atraves de testes de Qui-quadrado (P [less than or equal to] 0,05). Foi construido um indice de risco para a presenca de Megninia spp. a partir de variaveis consideradas como fatores de risco para a presenca desses ectoparasitos. O grafico da AC produzido para a caracterizacao epidemiologica da presenca de Megninia spp. apresentou um valor de qui-quadrado acumulado de 58,55%. Observa-se que houve uma associacao do indice de risco com a faixa de idades das aves, entre a presenca Megninia spp. e a utilizacao de oleo mineral e de acaricida na racao e, por ultimo, uma associacao entre a presenca de rolinhas (Columbina talpacoti) e a ausencia de acaros do genero Megninia. Estes resultados fornecem conhecimento sobre a epidemiologia de Megninia spp. Alem disso, estas informacoes poderao contribuir na tomada de decisao diminuindo os riscos de possiveis infestacoes nos planteis e dos efeitos negativos decorrentes por esse parasitismo. Palavras-chave: Megninia spp., indice de risco, analise de correspondencia. |
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ISSN: | 0103-8478 |
DOI: | 10.1590/0103-8478cr20170186 |