The effect of dietary manganese from two different sources on chicks (uninf
ected and infected with Ascaridia galli) was studied. Chick diet was supple
mented with 0.9 g Mn2+ kg(-1) food either in the form of MnSO4.H2O or 2Gly.
MnCl2.2H(2)O for 20 days. Chicks were divided into six groups: group 0, co
ntrol; group 1, control + MnSO4.H2O; group 2, control + 2Gly.MnCl2.2H(2)O;
group 3, infected with A. galli; group 4, infected with A. galli + MnSO4.H2
O; and group 5, infected with A. galli + 2Gly.MnCl2.2H(2)O. Body weight, mo
rtality, worm burden, and liver manganese content were investigated. Excess
dietary manganese increased weights and manganese level, but mortality and
worm burden were unaffected. A greater bioavailability of manganese from 2
Gly. MnCl2.2H(2)O was established.