The occurrence of aflatoxigenic Aspergillus spp. in dairy cattle feed in Southern Brazil

The occurrence of aflatoxigenic Aspergillus spp. in dairy cattle feed in Southern Brazil

ABSTRACT The presence of mycotoxins or related fungi in animal feed is a major problem for animal and human health. Silage and concentrated feed samples were collected from 21 dairy farms in the Western part of Paraná state in Southern Brazil. Water activity and pH of all samples were measured, and each sample was analyzed to check for the presence of aflatoxigenic Aspergillus. Water activity was observed to be lower in the concentrated feed samples. The pH was lower in the silage samples, indicating fermentation processes. Two silage samples and four concentrated feed samples were contaminated with Aspergillus spp. Seven isolates of Aspergillus spp. were obtained and their potential to produce aflatoxins was evaluated. Four of the isolates, two from the silage samples and two from the concentrated feed samples, produced the aflatoxins B1, B2, G1, and G2 in culture media. These isolates were identified as Aspergillus parasiticus and Aspergillus nomius. The presence of aflatoxigenic isolates of Aspergillus spp. in silage and concentrated feed samples is a matter of concern, because of the risk of aflatoxin production and contamination of the animal feed.

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Main Authors: Variane,Augusto Carlos Favaretto, Santos,Fabiane Cristina dos, Castro,Fausto Fernandes de, Barbosa-Tessmann,Ione Parra, Santos,Geraldo Tadeu dos, Pozza,Magali Soares dos Santos
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Microbiologia 2018
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400919
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spelling oai:scielo:S1517-838220180004009192018-10-17The occurrence of aflatoxigenic Aspergillus spp. in dairy cattle feed in Southern BrazilVariane,Augusto Carlos FavarettoSantos,Fabiane Cristina dosCastro,Fausto Fernandes deBarbosa-Tessmann,Ione ParraSantos,Geraldo Tadeu dosPozza,Magali Soares dos Santos Feed Dairy Aspergillus ABSTRACT The presence of mycotoxins or related fungi in animal feed is a major problem for animal and human health. Silage and concentrated feed samples were collected from 21 dairy farms in the Western part of Paraná state in Southern Brazil. Water activity and pH of all samples were measured, and each sample was analyzed to check for the presence of aflatoxigenic Aspergillus. Water activity was observed to be lower in the concentrated feed samples. The pH was lower in the silage samples, indicating fermentation processes. Two silage samples and four concentrated feed samples were contaminated with Aspergillus spp. Seven isolates of Aspergillus spp. were obtained and their potential to produce aflatoxins was evaluated. Four of the isolates, two from the silage samples and two from the concentrated feed samples, produced the aflatoxins B1, B2, G1, and G2 in culture media. These isolates were identified as Aspergillus parasiticus and Aspergillus nomius. The presence of aflatoxigenic isolates of Aspergillus spp. in silage and concentrated feed samples is a matter of concern, because of the risk of aflatoxin production and contamination of the animal feed.info:eu-repo/semantics/openAccessSociedade Brasileira de MicrobiologiaBrazilian Journal of Microbiology v.49 n.4 20182018-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400919en10.1016/j.bjm.2018.05.005
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Variane,Augusto Carlos Favaretto
Santos,Fabiane Cristina dos
Castro,Fausto Fernandes de
Barbosa-Tessmann,Ione Parra
Santos,Geraldo Tadeu dos
Pozza,Magali Soares dos Santos
spellingShingle Variane,Augusto Carlos Favaretto
Santos,Fabiane Cristina dos
Castro,Fausto Fernandes de
Barbosa-Tessmann,Ione Parra
Santos,Geraldo Tadeu dos
Pozza,Magali Soares dos Santos
The occurrence of aflatoxigenic Aspergillus spp. in dairy cattle feed in Southern Brazil
author_facet Variane,Augusto Carlos Favaretto
Santos,Fabiane Cristina dos
Castro,Fausto Fernandes de
Barbosa-Tessmann,Ione Parra
Santos,Geraldo Tadeu dos
Pozza,Magali Soares dos Santos
author_sort Variane,Augusto Carlos Favaretto
title The occurrence of aflatoxigenic Aspergillus spp. in dairy cattle feed in Southern Brazil
title_short The occurrence of aflatoxigenic Aspergillus spp. in dairy cattle feed in Southern Brazil
title_full The occurrence of aflatoxigenic Aspergillus spp. in dairy cattle feed in Southern Brazil
title_fullStr The occurrence of aflatoxigenic Aspergillus spp. in dairy cattle feed in Southern Brazil
title_full_unstemmed The occurrence of aflatoxigenic Aspergillus spp. in dairy cattle feed in Southern Brazil
title_sort occurrence of aflatoxigenic aspergillus spp. in dairy cattle feed in southern brazil
description ABSTRACT The presence of mycotoxins or related fungi in animal feed is a major problem for animal and human health. Silage and concentrated feed samples were collected from 21 dairy farms in the Western part of Paraná state in Southern Brazil. Water activity and pH of all samples were measured, and each sample was analyzed to check for the presence of aflatoxigenic Aspergillus. Water activity was observed to be lower in the concentrated feed samples. The pH was lower in the silage samples, indicating fermentation processes. Two silage samples and four concentrated feed samples were contaminated with Aspergillus spp. Seven isolates of Aspergillus spp. were obtained and their potential to produce aflatoxins was evaluated. Four of the isolates, two from the silage samples and two from the concentrated feed samples, produced the aflatoxins B1, B2, G1, and G2 in culture media. These isolates were identified as Aspergillus parasiticus and Aspergillus nomius. The presence of aflatoxigenic isolates of Aspergillus spp. in silage and concentrated feed samples is a matter of concern, because of the risk of aflatoxin production and contamination of the animal feed.
publisher Sociedade Brasileira de Microbiologia
publishDate 2018
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400919
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