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Efficacy of Montmorillonite Clay (NovaSil PLUS) for Protecting Full-Term Broilers from Aflatoxicosis

C. A. Bailey^*,1,2, G. W. Latimer, A. C. Barr, W. L. Wigle, A. U. Haq^*, J. E. Balthrop and L. F. Kubena

^* Department of Poultry Science, Texas A&M University System, College Station 77843-2472; Office of the Texas State Chemist, PO Box 3160, College Station 77841-2114; Texas Veterinary Medical Diagnostic Laboratory, College Station 77843-4471; and USDA/ARS, Southern Plains Agricultural Research Center, College Station, Texas 77843-2486

Correspondence: ¹ Corresponding author: cabailey{at}poultry.tamu.edu

Contamination of poultry feeds by aflatoxin is a problem faced by poultry producers at one time or another. Of the several strategies used to reduce the economic effect of aflatoxin-contaminated feeds, the inclusion of selective enterosorbents may be the most practical and cost effective. This study evaluated the effectiveness of montmorillonite clay (MC) supplied as NovaSil PLUS on the performance of full-term commercial type broilers. Eight hundred male commercial broiler chickens (all vaccinated for Marek’s disease, Newcastle disease, and bronchitis) were randomly assigned, (20 each) to 40 floor pens and fed 1 of the 4 dietary treatments of industry-type corn-soy broiler diets. Treatments consisted of a control feed, control feed plus 0.5% MC (CMC), a feed containing ~4,000 ppb aflatoxin (AF), and a feed containing ~4,000 ppb aflatoxin plus 0.5% MC (AMC). The starter diet was fed for 3 wk, the grower for 2 wk and, the finisher for 1 wk. Selected birds were randomly retained for specific tissue analyses of blood serum; relative liver, spleen, and kidney weights; and histological examination of sampled organs.

The combined data showed that birds fed MC as NovaSil PLUS received significant protection against the effects of the aflatoxin for most parameters measured. This level of protection did not totally protect the birds from the effects of feeding extremely high concentrations of aflatoxin, however, as their performance was not as good as that of the control group. To our knowledge this is the first study addressing the protective effects of MC in full-term broilers fed steam-pelleted feeds more nearly approximating commercial production.

Key Words: aflatoxin • detoxification • montmorillonite • NovaSil PLUS • broiler

² Use of trade names in this publication does not imply endorsement of the product mentioned or criticism of similar products not mentioned.

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