Identification and in vitro screening of avian yeasts for use as probiotic

Hernández, Yaneisy García; Rodríguez, Zoraya; Brandão, Luciana R.; Rosa, Carlos A.; Nicoli, Jacques R.; Iglesias, Arabel Elías; Pérez‐Sánchez, Tania; Salabarría, Ramón Boucourt; Halaihel, Nabil

doi:10.1016/j.rvsc.2011.09.005

Cited by 35 publications

(17 citation statements)

References 15 publications

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“…Wickerhamomyces anomalus survived in 0·6% bile salts (García‐Hernández et al . ). Tolerance to 2% bile salts concentration was also reported for strains of Trichosporon cutaneum , Candida rugosa and Candida lambica (Gotcheva et al .…”

Section: Discussionmentioning

confidence: 97%

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Probiotic potentials of yeasts isolated from some cereal-based Nigerian traditional fermented food products

2015

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Section: Discussionmentioning

confidence: 97%

“…Samples were taken at 0, 4, 8 and 24 h and the viable cells counts (CFU ml −1 ) were determined (García‐Hernández et al . ). The specific growth rate ( μ ) and duplication time ( T d ) were calculated using the equation given by Bruno et al .…”

Section: Methodsmentioning

confidence: 97%

Probiotic potentials of yeasts isolated from some cereal-based Nigerian traditional fermented food products

2015

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“…enterica serovar Typhimurium, and Enterococcus faecalis which could be a mechanism to support animals to resist pathogen establishment. [15] For several decades yeast cells have been used as single cell proteins because these organisms grow rapidly and the protein contents are generally high (7 to 12% nitrogen on a dry weight basis. [50] In addition to being a protein source in animal feed, yeast cells are also rich sources of B vitamins.…”

Section: Methionine Content In Yeastsmentioning

confidence: 99%

“…[13] Gitler et al [14] reported that torula yeasts could replace fish meal up to 25% without influencing the rate of growth in chickens. Recently, García-Hernández et al [15] isolated yeasts from the excreta of broilers and found that some strains have potential as probiotic supplements. However, yeast hydrolysate used as a protein source in animal feed has been shown to be insufficient as a source of methionine.…”

Section: Introductionmentioning

confidence: 99%

“…However, yeast hydrolysate used as a protein source in animal feed has been shown to be insufficient as a source of methionine. [15,16] To improve methionine content, mutagenesis by UV irradiation or administering N-methyl-N -nitro-N-nitrosoguanidine have been used to select methionine-analog resistant mutants that are characterized by greater methionine biosynthesis. [17][18][19][20][21][22] The objectives of this study were to identify potentially high methionine-containing yeasts for possible use in the organic poultry industry by utilizing methionine analogs to screen methionine overproduction in wild-type yeasts and characterizing their respective growth responses to methionine analogs.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of isolated yeast growth response to methionine analogs

Saengkerdsub

Lingbeck

Wilkinson

et al. 2013

Journal of Environmental Science and Health, Part B

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Methionine is one of the first limiting amino acids in poultry nutrition. The use of methionine-rich natural feed ingredients, such as soybean meal or rapeseed meal may lead to negative environmental consequences. Amino acid supplementation leads to reduced use of protein-rich ingredients. The objectives of this study were isolation of potentially high content methionine-containing yeasts, quantification of methionine content in yeasts and their respective growth response to methionine analogs. Minimal medium was used as the selection medium and the isolation medium of methionine-producing yeasts from yeast collection and environmental samples, respectively. Two yeasts previously collected along with six additional strains isolated from Caucasian kefir grains, air-trapped, cantaloupe, and three soil samples could grow on minimal medium. Only two of the newly isolated strains, K1 and C1, grew in minimal medium supplied with either methionine analogs ethionine or norleucine at 0.5% (w/v). Based on large subunit rRNA sequences, these isolated strains were identified as Pichia udriavzevii/Issatchenkia orientalis. P. kudriavzevii/I. orentalis is a generally recognized as a safe organism. In addition, methionine produced by K1 and C1 yeast hydrolysate yielded 1.3 ± 0.01 and 1.1 ± 0.01 mg g(-1) dry cell. Yeast strain K1 may be suitable as a potential source of methionine for dietary supplements in organic poultry feed but may require growth conditions to further increase their methionine content.

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