Introduction
With adoption of intensive farming practices, the usage of compound feed has increased in dairy industry. Cereal grains and oil cakes are the major ingredients commonly used in a compound feed. These ingredients can be contaminated with fungal organisms during any stage of their growth, harvesting, storage or after processing. Recent changes in the climatic conditions have also favored fungal colonization and mycotoxin contamination of agricultural crops and products. Under tropical conditions, fungal species like Aspergillus, Fusarium and Penicillium are commonly known to infest feed raw materials and produce mycotoxins like aflatoxin B1 (AFB1), ochratoxin, trichothecenes, citrinin, zearalenone, etc.
Aflatoxin: The most notorious mycotoxin
Amongst all mycotoxins, AFB1is the most extensively studied mycotoxin in dairy cattle, as the excretion of aflatoxin M1(AFM1) in dairy milk is a public health concern. Regulatory authorities are trying to control the exposure of aflatoxin in cattle and humans through mandating strict limits on aflatoxin levels in feed and milk. However, according to Kemin’s internal survey on AFB1 prevalence, the problem of AFB1 is growing day by day. The survey findings can be summarized as mentioned below:
Dietary Mycotoxin Binders: An approach to manage the mycotoxin menace
Various materials, such as activated clays, yeast cell walls, enzymes etc., are being investigated either alone or in combination to manage the problems associated with mycotoxins in dairy animals. Due to the unique structure and physiology of ruminant’s gastrointestinal tract (GIT), it is very essential for any mycotoxin binder to demonstrate its efficacy considering these factors.
Innovation
The latest formulation produced by Kemin contains mixture of activated clays carefully chosen through unique screening techniques. The formulation has also undergone both in vitro and in vivo assessment to determine its efficacy.
Invitro assessment
After careful consideration of different physiological conditions of ruminant’s GIT, an invitro triphasic assay has been developed to test the efficacy of the final formulation. It was
Invivo assessment
To validate the invitro findings, an invivo trial was conducted using 20 dairy animals in
The maximum residual level (MRL) of AFM1 in milk is 0.05 ppb according to European Food Safety Authority (EFSA). Hence, in this trial supplementation of dietary activated clays helped to control AFM1 in milk under MRL.
Conclusions
Based on the in vivo and in vitro studies, it can be suggested that dietary activated clays could able to bind AFB1 inside the animal, thereby preventing the formation of AFM1 and its subsequent secretion into the milk. Moreover, dietary activated clays can be an efficient choice to manage the mycotoxin menace in dairy animals under commercial conditions.
Note: References available on request.
by Rajendra Moorthy, Prateek Shukla and Nabila Fatima, Kemin Industries South Asia
Published by : Think Grain Think Feed