Factors Affecting Zinc Content of Bovine Hair

Miller, W.J.; Powell, G.W.; Pitts, William J.; Perkins, H. F.

doi:10.3168/jds.s0022-0302(65)88397-7

Cited by 30 publications

(14 citation statements)

References 11 publications

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“…Anke (1965) and Hall et al (1971) reported that Zn content of pigmented and white hair from Holstein and Hereford cattle did not differ significantly. However, Miller et al (1965) found a significant difference in Zn content (124.1 vs 112.2 ppm) of black and white hair from Holstein cattle.…”

Section: Factors Affecting Mineral Content Of Hairmentioning

confidence: 69%

“…Hambidge et al (1972) reported that Zn concentrations in human hair decline sharply after birth, remain low for 2 or 3 yr and then increase toward original values. Miller et al (1965) reported that Zn content of cattle hair may be affected in a similar manner. They found that Zn content of hair increased substantially as calves increased in age from 8 to 15 wk.…”

Section: Factors Affecting Mineral Content Of Hairmentioning

confidence: 92%

“…Strain et al (1966) also reported that Zn content was higher in samples of human hair collected during the summer than in samples collected at any other time of the year. Miller et al (1965) reported a seasonal pattern for Zn accumulations in hair of Holstein cattle. Hair collected in November was lower in Zn than hair collected at any other time of year.…”

Section: Factors Affecting Mineral Content Of Hairmentioning

confidence: 99%

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Mineral Concentrations in Hair as Indicators of Mineral Status: a Review

Combs

Goodrich

Meiske

1982

Journal of Animal Science

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Mineral content of hair is affected by season, breed, hair color within and between breeds, sire, age and body location. Seasonal effects may be due to stage of growth of hair and to changes caused by perspiration, surface contamination and diet. Breed and sire effects on mineral content of hair complicate prediction of nutritional status based on hair analyses because, in many commercial cattle, neither breed nor sire is known. Hair from young animals may be lower in Zn, Mn and Fe, but is higher in Na, Ca, Cu and K than that from older animals. Pigmented hair apparently is higher in Ca, Mg, K and NA than white hair, but trace mineral concentrations are similar in hair of different colors. The effect of body location on mineral content of hair may be due to differences in surface contamination, differences in hair growth cycles and differences in texture of the hair. Concentrations of Ca, P and Cu in hair are not affected by dietary intake of these minerals. Zn and Se contents of hair may reflect dietary intake. Information on other required minerals in lacking. Pb, As and, possibly, Cd levels in hair may be related to dietary or environmental exposure. Because of the many factors that cause variation in mineral content of hair, hair analyses are not likely to be precise indicators of the mineral status of animals. Hair analyses may help to detect severe deficiencies of some required minerals or exposure to some heavy metals. However, if hair analyses are to be conducted, care must be taken to compare values from test animals with those from animals of similar breed, sex, season, sire and color. In addition, new hair growth should be analyzed, environmental contamination should be minimized and the hair samples should be cleaned before analyses.

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Section: Factors Affecting Mineral Content Of Hairmentioning

confidence: 69%

Section: Factors Affecting Mineral Content Of Hairmentioning

confidence: 92%

Section: Factors Affecting Mineral Content Of Hairmentioning

confidence: 99%

See 1 more Smart Citation

Mineral Concentrations in Hair as Indicators of Mineral Status: a Review

Combs

Goodrich

Meiske

1982

Journal of Animal Science

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“…Levels of zinc in hair have been demonstrated to reflect dietary intake of zinc in several animal species [24,25,29,33,43], and have been reported to provide a good index of stores of zinc in the body [47]. Low concentrations of zinc in human hair have been observed in association with zinc deficiency in the Mid East [48].…”

Section: Introductionmentioning

confidence: 99%

Low Levels of Zinc in Hair, Anorexia, Poor Growth, and Hypogeusia in Children

Km¹,

Hambidge²,

Jacobs³

et al. 1972

Pediatr Res

579

168

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ExtractConcentrations of zinc in hair were determined for 338 apparently normal subjects living in Denver with ages ranging from 0-40 years. Mean concentrations of zinc in hair were: neonates (25) 174 db 8 (1 SEM); 3 months^-years (93) 88 ± 5; 4-17 years (132) 153 ± 5, and 17^0 years (88) 180 ±4. Ten children more than 4 years of age had levels of zinc in hair of less than 70 ppm. Seven of these ten children had a history of poor appetite and eight had heights on or below the 10th percentile; the high incidence of low growth percentiles was not explicable on a familial basis. Taste acuity was tested in six of these children, and five had evidence of obj ective hypogeusia. After supplementing the diet with small quantities of zinc, taste acuity was normalized in each of these children and levels of zinc in hair increased. Speculation

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Zur Beurteilung der Zinkversorgung landwirtschaftlicher Nutztiere wurde mehrfach die Haaranalyse vorgeschlagen und auch angewendet (ANKE 1965 a u. b; HENNIG 1965HENNIG , 1966MILLER et al 1965). Ob dieser Haartest den Zinkstatus des Organismus immer ausreichend und empfindlich genug anzeigt, sollte in tierexperimentellen Modelllversuchen an wachsenden Ratten gepruft werden.

…”

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Zinkkonzentration des Rattenhaares bei Zink-Depletion und -Repletion

Pallauf¹,

Kirchgeßner²

2010

Zentralblatt Für Veterinärmedizin Reihe A

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Zusammenfassung An entwöhnte männliche Ratten wurde in zwei Versuchen eine halbsynthetische Zinkmangeldiät mit oder ohne Zinkergänzung verfüttert und der Zinkgehalt der Rückenhaare bei kontrollierter Depletion und Repletion verfolgt. Bei extremer Depletion der Ratten durch eine Diät mit nur 1,9 ppm Zink zeigte sich über eine Versuchsdauer von 35 Tagen infolge baldigen Stillstandes des Haarwachstums und Haarausfall nur eine vorübergehende Reduzierung der Zinkkonzentration im Haar. Gestaffelte Zinkzulagen führten deshalb innerhalb von 2–8 ppm Zink in der Diät sogar zu reduzierten Zinkgehalten im Haar, weil im Zusammenhang mit steigenden Lebendgewichten in zunehmendem Maße neues zinkarmes Haar gebildet wurde. Erst in dem für die Haarbildung suboptimalen Bereich (8–12 ppm Diätzink) nahm die Zinkkonzentration des Haares sukzessiv mit steigendem Versorgungsniveau zu. Zwischen 15 und 100 ppm Diätzink stellte sich ein Plateau ein. Auf Grund mangelhafter Beziehungen zu anderen Kriterien der Zinkversorgung und der je nach Mangel‐ und überschußbereich sehr wechselhaften Reaktion des Zinkgehaltes im Haar, kann der Haartest als Indikator des Zinkstatus landwirtschaftlicher Nutztiere nicht allgemein empfohlen werden. Summary The zinc concentration in rat hair in zinc deficiency and excess Suitability of hair as an indicator of zinc distribution In weaned male rats on a semi‐synthetic diet deficient in zinc, with or without zinc supplements, two experiments were carried out to follow the zinc content of the hair of the back during controlled deficiency and excess of zinc. In extreme deficiency produced by a diet with only 1.9 ppm. Zn there occurred over an experimental period of 35 days, because of rapid standstill of hair growth and hair loss, only a temporary reduction in the level of zinc in the hair. Stepwise additions of zinc, with levels of 2–8 ppm. in the diet, resulted in an actual reduction of the level of zinc in the hair, since in association with increasing bodyweight there was a large increased mass of new hair formed deficient in zinc. Only when the sub‐optimal zinc level necessary for hair production (8–12) was available did the zinc level in the hair rise with successive additions of zinc. Between 15 and 100 ppm of zinc in the diet resulted in a plateau. Because of a lack of correlation with other criteria of zinc distribution and the very varying reaction of the zinc level in the hair when zinc is present in varying degrees of deficiency or excess, the hair test cannot in general be recommended as a reliable indicator of zinc status in farm animals. Résumé Concentration du zinc dans le poil du rat lors d'un apport ou d'une carence en zinc Sur l'utilisation du poil comme indicateur de la distribution du zinc Au cours de deux expériences, on applique à des rats mâles sevrés un régime semi‐synthétique dépourvu de zinc, avec ou sans supplément de zinc. Puis l'on détermine la teneur en zinc des poils du dos, après un apport ou un retrait contrôlé de zinc. Lors d'une carence extrême, après une diète contenant 1,9 ppm...

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Factors Affecting Zinc Content of Bovine Hair

Cited by 30 publications

References 11 publications

Mineral Concentrations in Hair as Indicators of Mineral Status: a Review

Mineral Concentrations in Hair as Indicators of Mineral Status: a Review

Low Levels of Zinc in Hair, Anorexia, Poor Growth, and Hypogeusia in Children

Zinkkonzentration des Rattenhaares bei Zink-Depletion und -Repletion

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