High Incidence of Fusarium verticillioides in Animal and Poultry Feed Mixtures Produced in Karnataka, India

摘要

The aim of present study was to determine the species incidence of genus Fusarium in animal and poultry feed mixtures and to know the extent of potential risk of feed contamination by Fusarium mycotoxins. One hundred and seven different animal feed samples and (71) poultry-feed mixtures were collected from Karnataka (India) during April 2004 to April 2005. All samples were analyzed for the incidence of Fusarium species on PDA, DCPA and MGA 2.5 media. A total frequency of the Fusarium species isolated was determined to be 50% and their counts ranged from 9.5x10¹ to 4.4x10⁵ CFU g^-1 of poultry feed and 5.728x10¹ to 2.088x10⁵ CFU g^-1 of animal feed sample. Of the total number of Fusarium isolates (330) from animal and poultry feedstuffs, F. verticillioides recorded 89.09%, followed by F. pallidoroseum (6.66%), F. oxysporum (3.63%) and F. solani (0.6%). The results of this study showed a high incidence of F. verticillioides in poultry feed mixtures while animal feeds especially cotton seeds, fine wheat bran and maize pellets showed high incidence of F. verticillioides . Bengal gram husk, coarse horse gram powder, groundnut seed cake, sunflower seed cake and wheat flakes showed very low incidence of F. verticillioides. The study not only reveals a high incidence of the potentially toxigenic F. verticillioides , in the local feeds of Karnataka region but also represents the possibility of occurrence of fusarial mycotoxins, especially fumonisins.