Iodine Transfer and Concentration in the Prepartum Cow, Fetus, and Neonatal Calf

Miller, J.K.; Swanson, E.W.; Aschbacher, P. W.; Cragle, R.G.

doi:10.3168/jds.s0022-0302(67)87617-3

Cited by 18 publications

(9 citation statements)

References 9 publications

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“…The foetal calf stomach has been reported to accumulate more iodine than the foetal serum (Miller et al 1967), and similar results have been recorded in rabbits (Crone and Waag~l961). The foetal part of the placenta concentrates iodine in rabbits (Crone and Waag 1961), cows (Miller et al 1967), pigs and sheep (Contopoulos et al 1964).…”

Section: Thyroid Activity During Pregnancy and Foetal Lifesupporting

confidence: 70%

“…Following birth there is a rapid decrease in both total and proteinbound iodine content of the serum, suggesting a high rate of both faecal and urinary iodine loss (Miller et al 1967). Little is known of the need 61.…”

Section: Thyroid Activity During Pregnancy and Foetal Lifementioning

confidence: 99%

“…Although the passage of thyroid hormones across the placenta is limited, iodide is actively accumulated by the foetus, (Gorbman et al 1952;Contopoulos et al 1958;Crone and Waag~l961;Miller et al 1967), possibly by a method similar to thyroidal iodide uptake, as the placental iodide transfer can be inhibited by perchlorate (Crone and Waag~1961).…”

Section: Thyroid Activity During Pregnancy and Foetal Lifementioning

confidence: 99%

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Congenital goitre in sheep in southern Tasmania

Statham¹,

Bray²

1975

Aust. J. Agric. Res.

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Congenital goitre was first recorded in Tasmanian sheep In 1945. Severe but sporadic outbreaks have since occurred in 1956, 1964 and 1968. The disease seemed to be associated with particular farms and its incidence often differed markedly between ewe flocks on the one farm. A survey indicated that the condition was mainly confined to the Derwent Valley and the northern Midlands. Studies involved a grazing trial near Bothwell, where goitre was endemic, and included supporting animal house tnals and plant growth studies. Soil type was shown to be a major factor in the disease: ewes grazing pasture on a sandy soil produced many more goitrous lambs than ewes grazing pasture on clay soil. Analyses of the two pastures revealed that those on sandy so11 contained less iodine than those on clay soil but neither contained the minimum level necessary to prevent goitre. Observations revealed that outbreaks of the disease followed wet autumns with subsequent lush pasture during pregnancy. This correlation could be explained if pasture grown under moist conditions contained less iodine than pasture grown under moisture stress. However, experiments with the two main pasture species (perennial ryegrass and subterranean clover) showed that plant iodine levels were not affected by the water supply. Two goitrogenic agents, nitrate and thiocyanate, were present in the pastures, but they were not considered to be Important in the aetiology of the disease. Similarly, the drinking water was found to be unimportant, even though the two sources available contained widely different amounts of iodine. Apparently, between-year variation in the incidence of goitre and the effect of soil type can best be explained by a varying iodine intake dependent on soil ingestion which varies with pasture availability. This hypothesis is discussed in the light of the results.

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Section: Thyroid Activity During Pregnancy and Foetal Lifesupporting

confidence: 70%

Section: Thyroid Activity During Pregnancy and Foetal Lifementioning

confidence: 99%

Section: Thyroid Activity During Pregnancy and Foetal Lifementioning

confidence: 99%

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Congenital goitre in sheep in southern Tasmania

Statham¹,

Bray²

1975

Aust. J. Agric. Res.

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“…This profile of the plasma iodide levels does not seem to be related to calf milk consumption since it was similar in the three groups of animals in which HF calves (from dairy cows) were fed only twice daily and Salers and Charolais (from suckling beef cows) suckled ad libitum. At the end of gestation in the bovine species, maternal iodine passes readily to the foetus (Miller et a/., 1967). At birth plasma iodine concentrations are much higher in the calves (32.8 pg/dl) than in their dams (4 pg/dl), then during the first 6 neonatal days, there is a marked decrease in both total and protein-bound iodine in the calf plasma, suggesting a high rate of fecal as well as urinary iodine excretion during that period (Miller et al, 19671.…”

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confidence: 99%

Thyroxine, triiodothyronine and iodide in different breeds of newborn calves

Davicco¹,

Vigouroux²,

Dardillat³

et al. 1982

Reprod. Nutr. Dévelop.

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Summary. Plasma thyroxine (T 4 ), triiodothyronine (T 3 ) and iodide levels were measured from birth until 30 days of age in 17 Holstein x Friesian (HF), 7 Salers and 7 Charolais calves born at term. The response of plasma T 4 and T 3 levels to bovine thyrotropin (TSH) injection was also compared in two groups of 9 HF calves 3hrs and 21 days, respectively, after birth.In the HF calves, plasma T 4 and T 3 levels increased from birth to 6 hrs (when the rectal temperature of these calves decreased slightly), then diminished until day 7 and remained stable until 30 days of age. In Salers calves, changes in the plasma T 4 and T 3 levels were not different from those observed in HF animals. However, in Charolais calves, there was no significant increase in plasma T 4 and T 3 levels after birth. Twelve and 24 hrs after birth, the plasma iodothyronine levels measured in these animals were lower than in HF calves. In Salers and Charolais calves a positive linear relationship was demonstrated between plasma T 4 (or T 3 ) levels at birth and the birth weight. In the three groups of calves, plasma iodide levels decreased from birth until 10 days of age, then remained stable until the end of the first neonatal month.Intravenous injection of the same dose of bovine TSH (5 mU/kg of body weight) induced a rise in the plasma T 4 and T 3 levels which was significantly more intense in 21-day old calves than in 3-hr old calves.Introduction.

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“…Thus, the discrepancies between the analytical methods, particularly iodine contamination with free thyroxine, could explain why Davicco et al (1980) (Aumont et al, 1989). (Miller et al, 1967) in bovines (range : 4-6) and in ovines (range : 8-9) (Book et al, 1974 (Dussault et al, 1971(Dussault et al, , 1972Erenberg et al, 1974) or the bovine placenta (Miller et aL, 1967;Hernandez et al, 1972 (Walfish, 1981;Faber, 1984;Laurberg, 1984), the high level of Pll could also be assumed to inhibit the conversion of T4 to T3. Results recorded on ewes (Aumont et al, 1989) have also suggested this hypothesis.…”

Section: Analysesmentioning

confidence: 99%

Iodine nutrition in ewes. 2. Effects of low to high iodine intake by ewes on the I content of biological fluids and plasma immunoglobulins G in newborn lambs

Aumont¹,

Levieux²,

Lamand³

et al. 1989

Reprod. Nutr. Dévelop.

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2. I intake of ewes had no effect on birthweight, body weight gain, or mortality between birth and wk 2 of life. No difference between the groups was recorded in the weights of brain, heart, lungs, and liver of lambs killed at birth. However, the weight of both the thyroid lobes in lambs from group E was lower than that of the other groups. The I content of the thyroid lobes of lambs from group A was 30-40% lower than that of the other groups.3. The plasma inorganic iodine (PII) of lambs from birth to d42 of life was affected by ewe I intake, except for groups A and B, during the first 16 h of life. The Pll of lambs increased with the I intake via milk in each group. The ratio of Pil of lambs at birth/Pll of ewes at d7 prepartum was 3.77, 2.96,

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Iodine Transfer and Concentration in the Prepartum Cow, Fetus, and Neonatal Calf

Cited by 18 publications

References 9 publications

Congenital goitre in sheep in southern Tasmania

Congenital goitre in sheep in southern Tasmania

Thyroxine, triiodothyronine and iodide in different breeds of newborn calves

Iodine nutrition in ewes. 2. Effects of low to high iodine intake by ewes on the I content of biological fluids and plasma immunoglobulins G in newborn lambs

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