Milk iodine concentration in cows treated orally or intramuscularly with a single dose of iodinated fatty acid esters

Abstract

ABSTRACT:The effect of a single oral dose of iodinated fa�y acid esters (IFAE) on iodine levels in colostrum and milk of goats was tested. In experimental goats that received a single oral dose of IFAE before delivery, significantly higher iodine levels in milk were recorded 60 days a�er the delivery. In the following period since day 75 a�er the delivery iodine levels decreased, however, remained higher compared to the control, e.g. on day 152 the levels were twice as high as in the controls. Based on these results, the effect of a single oral and parenteral application of IFAE was tested on dairy cows. The results of the experiment showed that a single oral application of IFAE increases milk iodine levels for a shorter period. Intramuscular application resulted in a significantly higher milk iodine levels during the whole experimental period compared to both untreated controls and cows with oral application of IFAE.

Seasonal and regional variations of the iodine content in milk from Federation of Bosnia and Herzegovina

“…Only two samples had iodine concentration above 300 µg/kg, while 41 samples (29 % of total) had iodine concentration below 20 µg/kg. Values lower than 20 µg/L suggest iodine deficiency in the rations with no iodine supplements added (Herzig et al, 2003). Low values were found in all three seasons and in all regions except in R4 (Figure 2).…”

“…Useful biological indicators of iodine concentration in the soil of particular area are ruminants, which are fed roughages and water from the area where they are living (Herzig et al, 2003). About 80 to 90 % of dietary iodine is absorbed and most of the iodine not taken up by the thyroid gland is excreted in urine and milk (National Research Council, 2001).…”

“…Again, there are no important differences in feeding practice between the regions and authors expected lower iodine values, keeping in mind the distance from region R4 and the sea coast (Figure 1). Finally, sanitisation agents or disinfectant containing iodophores, which can contaminate milk with iodine (Herzig et al, 2003;Flachowsky et al, 2007), were generally not used in dairies in the country, and could not be considered as a possible cause of higher iodine in milk from the region. Iodine concentrations in crops and grasses decreased with distance to the sea, but the relation to the geological composition of the soil may be the predominant factor (Herzig et al, 2003).…”

“…Finally, sanitisation agents or disinfectant containing iodophores, which can contaminate milk with iodine (Herzig et al, 2003;Flachowsky et al, 2007), were generally not used in dairies in the country, and could not be considered as a possible cause of higher iodine in milk from the region. Iodine concentrations in crops and grasses decreased with distance to the sea, but the relation to the geological composition of the soil may be the predominant factor (Herzig et al, 2003). However, data on the geological composition of region R4 are lacking, and without knowledge of the iodine content in animal feeds and drinking water, reasons for high iodine content in milk from north-east of the country remain unclear.…”