Blood Hemoglobin, Plasma Iron, and Tissue Iron in Dams in Late Gestation, at Calving, and in Veal Calves at Delivery and Later

Abstract

The effect of 100 ppm of Fe in milk replacer on some hematological and tissue Fe variables was studied during the first 7 wk of the fattening period in two groups of eight calves with low or high initial blood hemoglobin concentrations. Hemoglobin concentration in calves with initially low hemoglobin increased. It decreased in those with initially high hemoglobin, but the difference remained over the experimental period. Higher mean liver Fe concentration, in some cases extremely high, and lower mean total Fe-binding capacity were found throughout the experiment in the group with the initial high hemoglobin. Of all variables, only low muscle Fe concentrations were correlated linearly with plasma Fe. In another experiment, the relationship of some hematological and tissue Fe variables during late gestation (about 10 d prepartum), at calving in dams, and at delivery in calves was investigated. The calves showed markedly higher liver Fe concentrations at delivery than their dams just before delivery, but these liver Fe concentrations were not correlated between dam and calf. The hematological and tissue Fe variables showed a weak correlation between dams and calves during late gestation or at delivery. However, dams as well as calves were Fe-sufficient.

Koyunlarda Doğum Öncesi ve Sonrası Serum Demir Durumu ve Hematolojik Endekslerle İlişkisi

“…In the present study, postpartum serum iron levels between 1-12 weeks were lower than those in non-pregnant sheep and those in 1 wk before parturition. This study revealed decreased iron levels in sheep after parturition as seen in cattle and buffaloes [21][22][23] . Miltenburg et al [21] suggested that the use of dam's iron stores by fetus at delivery was associated with these low iron levels in dams.…”

“…This study revealed decreased iron levels in sheep after parturition as seen in cattle and buffaloes [21][22][23] . Miltenburg et al [21] suggested that the use of dam's iron stores by fetus at delivery was associated with these low iron levels in dams. Also, in the same study, it was noted that calving and expansion of colostrum intake can lower the plasma iron level in dams.…”

“…Miltenburg et al [21] conducted a study on the level of plasma iron in dams and calves and found that during parturition and early in postpartum period dams had lower plasma iron level than prepartum period in contrast with the calves' plasma iron levels. One of the recent study indicated that the low level of iron in postpartum period of cattle can be hardly increased by mineral injection including iron chloride [23] .…”

“…In studies conducted in cows and buffaloes, were reported to have lower serum iron levels in postpartum according to prepartum period [21,22] . Miltenburg et al [21] conducted a study on the level of plasma iron in dams and calves and found that during parturition and early in postpartum period dams had lower plasma iron level than prepartum period in contrast with the calves' plasma iron levels.…”

Mucosal uptake, mucosal transfer and retention of iron in veal calves

“…Hb was expressed as g/100 ml (mmol/L x 1.611). PI and TIBC were determined colorimetrically (Miltenburg et al, 1991b). TIBC-SAT was calculated as PI/TIBC.…”