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Field Investigations of Glyphosate in Urine of Danish Dairy Cows
Authors
Monika Krüger, Wieland Schröd, Jürgen Neuhaus and Awad Ali Shehata
Abstract
In the present study, thirty dairy cows from each of
eight Danish dairy farms were investigated for excretion of glyphosate
in urine. Blood serum parameters indicative of cytotoxicity as alkaline
phosphatase (AP), glutamate dehydrogenase (GLDH), glutamate oxaloacetate
transaminase (GOT), creatinine kinase CK), nephrotoxicity,
(urea, creatine), cholesterol and the trace elements as manganese (Mn),
cobalt (Co), selenium (Se), copper (Cu) and zinc (Zn) were investigated.
All cows excreted glyphosate in their urine but in varying
concentrations. Increased levels of GLDH, GOT and CK in cows from all
farms demonstrate a possible effect of glyphosate on liver and muscle
cells. High urea levels in some farms could be due to nephrotoxicity of
glyphosate. Also the unexpected very low levels of Mn and Co were
observed in all animals which could be explained due to a strong mineral
chelating effect of glyphosate. In contrast the mean levels of Cu, Zn
and Se were within the normal reference range. In conclusion, this study
gives the first documentation to which extent Danish dairy cattle are
exposed to Glyphosate and its impact on blood parameters.
A new study by scientists in Europe has revealed that Glyphosate (Roundup) is toxic to the normal metabolism of dairy cows.
In the new paper titled ‘Field Investigations of Glyphosate
in Urine of Danish Dairy Cows’ published in the Journal of Environmental
& Analytical Toxicology, researchers led by Dr Monika Krüger reveal
that “all cows investigated at the eight Danish dairy farms
excreted glyphosate in their urine at significant different amounts
between the farms.”
The researchers continue; “We found increased blood serum
levels of parameters indicative for cytotoxicity like GLDH, GOT, and CK
and the lipid profile marker cholesterol in cows at all farms and high
urea levels in half of the farm animals.
“Correlations between glyphosate and some of the measured blood serum
parameters to CK (R= 0.135), Se (R=0.188), Co (R= -0,403) and Zn
(R=0,175) demonstrate that glyphosate is toxic to the normal metabolism
of dairy cows. This study gives the first documentation to which extent
Danish dairy cattle are exposed to glyphosate and its impact on
different blood parameters.”
Thirty cows (15 fresh calving, 15 high yielding cows) at each of
the eight Danish farms were investigated. The age of these animals
ranged from 4 to 7 years with an average body weight of 550-600 Kg.
This study follows on from two studies during the last year which
have caused shockwaves around the globe regarding the possible dangers
of the glyphosate-based Roundup Weedkiller – the Worlds best
selling herbicide.
Firstly, in September 2012, in a study published in “Food and Chemical Toxicology”, researchers
led by Professor Gilles-Eric Seralini from CRIIGEN found that rats fed
on a diet containing NK603 Roundup tolerant GM maize or given water
containing Roundup, at levels permitted in drinking water and GM crops
in the US, developed cancers faster and died earlier than rats fed on a
standard diet. They suffered breast cancer and severe liver and kidney
damage.
The evidence suggesting that Roundup should be removed from shop
shelves worldwide is building and this latest Danish cow study only adds
to the pressure on farming organisations and food regulatory bodies to
take action.
As the Danish dairy cow study states: “The intensive use of
glyphosate has led to its wide-spread contamination of different
ecosystems where it influences plants, microorganisms, animals and many
components of the food chain.”
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