Gastrointestinal Nematodes, Diagnosis and Control

Disease caused by nematodes in the gastrointestinal tract of cattle has primarily economic impacts, and the effect of treatment is that cattle grow larger faster because of increased feed intake. The disease, control measures, and drugs used must be focused on for different ages and environments. Different drugs that specifically affect the parasites should be used and administered in a manner and time that accomplishes the best sustainable control. Management needs to ensure that at-risk animals are exposed to sufficient worms to stimulate their immunologic response but not overwhelm it.