Effective Use of Tea to Limit Dietary Iron Available to Starlings (Sturnus Vulgaris)

Seibels, Bob; Lamberski, Nadine; Gregory, Christopher R.; Slifka, Kerri A.; Hagerman, Ann

doi:10.1638/02-088

Cited by 19 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The smaller dose of tannic acid was chosen because the reaction ratio of tannic acid and iron is likely 1:1 in vitro [Gaffney et al, 2004], and 0.02 g contained twice the number of moles of tannic acid than iron in the experimental solution. Half the bats received 0.2 g of tannic acid because this solution contained 22 times the number of moles of tannic acid than iron, which is comparable to the ratio used in a study that found significantly reduced iron absorption with tannic acid in laboratory rats [Afsana et al, 2004] and contained more tannic acid relative to iron than was used in studies that found significantly reduced liver iron storage in starlings fed a high iron diet [Seibels et al, 2003;Olsen et al, 2006a,b].…”

Section: Methodsmentioning

confidence: 93%

Effect of tannic acid on iron absorption in straw‐colored fruit bats (Eidolon helvum)

2009

View full text Add to dashboard Cite

Excessive absorption and subsequent storage of dietary iron has been found in a variety of captively held birds and mammals, including fruit bats. It is thought that feeding a diet that is low in iron can prevent the onset of this disease; however, manufacturing a diet with commonly available foodstuffs that contains a sufficiently low iron concentration is difficult. An alternative is to feed captive animals that may be susceptible to this disease potential iron chelators such as tannins that may bind to iron and block its absorption. Using stable isotope methods established in humans, we measured iron bioavailability in straw-colored fruit bats (Eidolon helvum) and tested whether tannic acid significantly reduced the extent of iron absorption. Regardless of dose, tannic acid significantly reduced iron absorption (by 40%) and in the absence of tannic acid, iron absorption was extensive in this species (up to 30%), more so than in humans. Species susceptible to iron storage disease may efficiently absorb iron in the gut regardless of iron status, and supplementing these species with tannic acid in captivity may provide an alternative or additional means of preventing the development of this disease.

show abstract

Section: Methodsmentioning

confidence: 93%

Effect of tannic acid on iron absorption in straw‐colored fruit bats (Eidolon helvum)

2009

View full text Add to dashboard Cite

show abstract

“…2,3 The European starling has extensively been used as a model to study iron storage disease. [4][5][6][7][8] The starling in this case was diagnosed with chronic lymphocytic leukemia (CLL), with paraneoplastic HVS, based on physical examination and hematologic findings. The presenting symptom was quite unusual compared with small mammals diagnosed with CLL.…”

Section: Discussionmentioning

confidence: 99%

What is Your Diagnosis?

Gaharan

Gupta²,

Boudreaux³

et al. 2012

Journal of Avian Medicine and Surgery

View full text Add to dashboard Cite

“…10,40,60,72 Hidden sources of extra iron include other minerals such as dicalcium phosphate and drinking water. 33,34,58,60,63,72 This was shown to be effective in lemurs by following %TS. Periodic removal of commercial pellets (for 30 days once or twice a year) from the diet decreased iron analytes in birds of paradise.…”

Section: Prevention and Treatment Dietary Manipulationmentioning

confidence: 99%