, 2009). Then, despite the results observed we suggested that morphology is not efficient as the PCR in the discrimination of Eimeria species. The analysis of the lesion score shown to be the less effective method for the diagnosis of Eimeria species in the study conditions. Navitoclax cell line First, before the advent of anticoccidial drugs clinical coccidiosis are quite scarce in field operations and clear pathological lesions are

hard to found. Second, different species parasitize the same or very close regions along the intestinal tract of birds could be overlapped with another. Also, when observing pathological macroscopic injuries changes are possible according to the life stage in which animals are evaluated or due to the use of anticoccidial drugs into the diet ( Prado, 2005). Later, even the characteristics of lesions may help in diagnosis, the differences are subtle and require

technical training and much experience to provide reliable results. The implementation of PCR as a routine diagnostic technique in poultry flocks could enhance the monitoring of fluctuations in Eimeria populations, helping in the adoption of specific measures against the parasite without the need to plus unnecessary work, thereby reducing production costs. This research was supported by the Foundation for Research on the state of Bahia (FAPESB) for financial support under DRC No. 0029/2007, Case No. 00 657 1431 1000, National Council for Scientific and Technological Development (CNPq) and University State of Santa Cruz (UESC); why Properties poultry collaborators; click here Biovet Laboratory in the person of Dr. Sandra Fernandez for yielding pure samples and isolated DNA to construct the positive control. “
“One of the major constraints of the animal production in the tropical regions is the presence of parasites. Losses in Brazil due to gastrointestinal nematodes are estimated to

be about 68 million dollars a year (Honer and Bianchin, 1987 and Soutello et al., 2002). In Brazil, Haemonchus spp. and Cooperia spp. are the most prevalent nematodes ( Bianchin et al., 2007 and Oliveira et al., 2009). Brazilian Nellore is a beef breed generally considered resistant to many ectoparasites, but it is not clear if this is true in the specific case of gastrointestinal parasites (Holgado and Cruz, 1994 and Oliveira et al., 2009). Although the mechanisms involved in host defense are better understood in Bos taurus ( Sonstegard and Gasbarre, 2001), less information is available for Bos indicus ( Bricarello et al., 2007, Bricarello et al., 2008 and Zaros et al., 2010). Genetic mechanisms underlying the variation of resistance can be related to the development of different profiles of Th1/Th2 cytokines (Meeusen et al., 2005 and Huse et al., 2006).