Application of a new red carotenoid pigment-producing bacterium, Enterobacter sp. P41, as feed supplement for chicken

Abstract

In order to use purple non-sulfur bacteria as feed supplement in chicken industries, screening for red pigment-producing bacteria with proteinases was done using hen feces as a target. One isolate, P 41 , with the highest proteinases activity was selected for further studies. Based on the data of biochemical and 16S rDNA sequence analysis, it was identified as Enterobacter sp. P 41 . This strain produced 0.16 mg of β-carotene with red color per gram of cell dry weight. Addition of the dried cells of Enterobacter sp. P 41 to chicken feeds did significantly intensify the egg yolk color (p = 0.000). Moreover, addition of the dried cells at the amount of 0.45 mg per kg of feed significantly increased the rate of egg-laying (p = 0.029). These results suggest that the dried cells of Enterobacter sp. P 41 might be useful as feed supplement for hens or other avian.

Selected Methods of Extracting Carotenoids, Characterization, and Health Concerns: A Review

“…Enterobacter species P 41 and halobacteria ( Halobacterium salinarium and Halobacterium Sarcina ) were observed to produce a significant amount of β-carotene and α-, β-bacterioruberin, respectively. , Lactobacillus plantarum strain CECT7531 and Staphylococcus aureus were identified to produce carotenoids such as 4,4′-diaponeurosporene and staphyloxanthin. S. aureus is immune to oxidative stress because of staphyloxanthin.…”