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Gastrointestinal parasitism is probably the most serious problem affecting sheep productivity, and is mainly observed during pregnancy and lactation. The aim of this study was to evaluate changes in blood proteins in Polwarth and Suffolk ewes naturally infected by gastrointesti nal parasites. Blood and feces samples were collected weekly from 42 ewes (18 Polwarth and 24 Suffolk). Collections were performed in 12 different times: 3 at pre-delivery (PD), 6 during lactation (LA), and 3 at post-weaning (PW). The analysis of results showed hypoproteinemia with a decrease in albumin level and A:G ratio, and hyperglobulinemia only in Suffolk ewes. The results of serum protein electrophoreresis revealed low levels of β and γ globulin mainly in Polwarth ewes. The EPG results revealed high nematode infection identified in coproculture as Haemonchus and at a lower level as Trichostrongylus, Oesophagostomum, and Cooperia. The changes seen in this study occurred during late pregnancy and mainly during lactation, being more evident in Polwarth ewes.

Proteinograma e exame coproparasitológico de ovelhas das raças Ideal e Suffolk durante o periparto