| resistance of santa ines, suffolk and ile de france sheep to naturally acquired gastrointestinal nematode infections. | a study was conducted to assess the breed resistance against nematode infections in santa ines, ile de france and suffolk male lambs over a 9-month period in são paulo state, brazil. lambs were born during the winter (year 2000) and were weaned at 2 months of age. the animals were then housed and treated with anthelmintics to eliminate natural infections by gastrointestinal nematodes. in late october 2000, lambs were placed in a paddock, where they stayed until august of the following year. feca ... | 2004 | 15019147 |