Safety and Transfer Study: Transfer of Bromoform Present in Asparagopsis Taxiformis to Milk and Urine of Lactating Dairy Cows
Autor: | M.J. Groot, Jan Dijkstra, Wouter Muizelaar, Gert van Duinkerken, Ruud J. B. Peters |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
0106 biological sciences
Health (social science) Animal Nutrition Asparagopsis armata Plant Science Urine Toxicology lcsh:Chemical technology 01 natural sciences Health Professions (miscellaneous) chemistry.chemical_compound Asparagopsis lcsh:TP1-1185 Histological examination 0303 health sciences rumen biology Team Animal Drugs 2 food and beverages Diervoeding Management CHBr3 Asparagopsis taxiformis Bromoform Safety safety food.ingredient Rumen Microbiology 03 medical and health sciences Animal science food Feces 030304 developmental biology VLAG Team Organic Contaminants 010604 marine biology & hydrobiology biology.organism_classification Seaweed Transfer chemistry cattle seaweed WIAS Cattle transfer Food Science |
Zdroj: | Foods, Vol 10, Iss 584, p 584 (2021) Foods 10 (2021) 3 Foods Volume 10 Issue 3 Foods, 10(3) |
ISSN: | 2304-8158 |
Popis: | Enteric methane (CH4) is the main source of greenhouse gas emissions from ruminants. The red seaweeds Asparagopsis taxiformis (AT) and Asparagopsis armata contain halogenated compounds, including bromoform (CHBr3), which may strongly decrease enteric CH4 emissions. Bromoform is known to have several toxicological effects in rats and mice and is quickly excreted by the animals. This study investigated the transfer of CHBr3 present in AT to milk, urine, feces, and animal tissue when incorporated in the diet of dairy cows. Twelve lactating Holstein-Friesian dairy cows were randomly assigned to three treatment groups, representing the target dose (low), 2× target dose (medium), and 5× target dose (high). The adaptation period lasted seven days, and subsequently cows were fed AT for 22 days maximally. The transfer of CHBr3 to the urine at days 1 and 10 (10–148 µg/L) was found with all treatments. On day 1, CHBr3 was detected in the milk of most cows in the low and medium treatment groups (9.1 and 11 µg/L, respectively), and detected in the milk of one cow in the high treatment group on day 9 (35 µg/L). Bromoform was not detected in milk and urine at day 17, nor at concentrations above the detection limit in feces and collected animal tissues. Two animals (low) were sacrificed, and their rumen wall showed abnormalities. Upon histological examination, signs of inflammation became visible. Animals regularly refused the feed or distinctively selected against AT. In conclusion, within the confines of the present experiment, CHBr3 does not accumulate in animal tissue, but can be excreted in urine and milk. |
Databáze: | OpenAIRE |
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