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Efficacy of natural unpurified halloysite-kaolinite and smectite clays in limiting carry-over of aflatoxin B1 and ochratoxin A from feed to broiler tissues, and effects on growth performances
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Abstract
Aflatoxin B1 (AFB1) and ochratoxin A (OTA) are among the most prevalent mycotoxins affecting poultry production, particularly in developing countries where feed quality control is limited. Clay-based binders have been widely used to reduce mycotoxin bioavailability and tissue carry-over, but their high cost restricts their adoption by smallholder farmers. This study evaluated the efficacy of locally available natural unpurified halloysite-kaolinite (B) and smectite (G) rich clays in limiting the carry-over of AFB1 and OTA from contaminated feed to broiler tissues, and their effects on growth performance. A total of 432 day-old Cobb 500 broiler chicks were randomly allocated to nine dietary treatments with three replicates each. Treatments included six diets supplemented with natural clays at 1, 2, or 3 g/kg (B1-B3) and G1-G3), two diets containing commercial binders (aluminosilicate + yeast, AY; bentonite, Be), and a contaminated control diet without additive (T0). Experimental diets were naturally contaminated using mouldy groundnut cake containing >80 μg/kg AFB1 and 45.2 μg/kg OTA. Growth performance parameters were recorded over a 42-day period, and AFB1 and OTA residues were quantified in liver, gizzard, and muscle tissues. Compared with the untreated control, all clay-supplemented diets significantly improved body weight gain and feed conversion ratio. Natural clays induced moderate but significant reductions in AFB1 and OTA residues across tissues, with halloysite-kaolinite at 2 g/kg and smectite at 1 g/kg showing the most consistent effects. However, commercial binders, particularly bentonite, exhibited greater overall efficacy in reducing mycotoxin carry-over. These results indicate that natural unpurified halloysite-kaolinite and smectite clays can partially mitigate the adverse effects of AFB1 and OTA under realistic tropical contamination conditions. Although less effective than commercial binders, their local availability and low cost make them promising complementary strategies for mycotoxin risk management in poultry production systems in low-income countries.
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Supplementary Materials
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 71 | 71 | 21 |
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| PDF-Downloads | 12 | 12 | 7 |
Efficacy of natural unpurified halloysite-kaolinite and smectite clays in limiting carry-over of aflatoxin B1 and ochratoxin A from feed to broiler tissues, and effects on growth performances
in World Mycotoxin JournalSearch for other papers by B. Dongmo Dongmo in
Current site
Google Scholar
PubMed
Search for other papers by G. Tchouan Deffo in
Current site
Google Scholar
PubMed
Search for other papers by A. Noune Pouaha in
Current site
Google Scholar
PubMed
Search for other papers by J.R. Kana in
Current site
Google Scholar
PubMed
Abstract
Aflatoxin B1 (AFB1) and ochratoxin A (OTA) are among the most prevalent mycotoxins affecting poultry production, particularly in developing countries where feed quality control is limited. Clay-based binders have been widely used to reduce mycotoxin bioavailability and tissue carry-over, but their high cost restricts their adoption by smallholder farmers. This study evaluated the efficacy of locally available natural unpurified halloysite-kaolinite (B) and smectite (G) rich clays in limiting the carry-over of AFB1 and OTA from contaminated feed to broiler tissues, and their effects on growth performance. A total of 432 day-old Cobb 500 broiler chicks were randomly allocated to nine dietary treatments with three replicates each. Treatments included six diets supplemented with natural clays at 1, 2, or 3 g/kg (B1-B3) and G1-G3), two diets containing commercial binders (aluminosilicate + yeast, AY; bentonite, Be), and a contaminated control diet without additive (T0). Experimental diets were naturally contaminated using mouldy groundnut cake containing >80 μg/kg AFB1 and 45.2 μg/kg OTA. Growth performance parameters were recorded over a 42-day period, and AFB1 and OTA residues were quantified in liver, gizzard, and muscle tissues. Compared with the untreated control, all clay-supplemented diets significantly improved body weight gain and feed conversion ratio. Natural clays induced moderate but significant reductions in AFB1 and OTA residues across tissues, with halloysite-kaolinite at 2 g/kg and smectite at 1 g/kg showing the most consistent effects. However, commercial binders, particularly bentonite, exhibited greater overall efficacy in reducing mycotoxin carry-over. These results indicate that natural unpurified halloysite-kaolinite and smectite clays can partially mitigate the adverse effects of AFB1 and OTA under realistic tropical contamination conditions. Although less effective than commercial binders, their local availability and low cost make them promising complementary strategies for mycotoxin risk management in poultry production systems in low-income countries.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 71 | 71 | 21 |
| Gesamttextansichten | 3 | 3 | 2 |
| PDF-Downloads | 12 | 12 | 7 |
