Association of techniques for estimation of gastrointestinal nematodeosis in Anglo Nubian crossbred goats

Abstract

The association of direct methods, as faecal exams, and indirect methods such as FAMACHA© system and microhematocrit, can facilitate classification of resistant and suscetible goats to gastro-intestinal nematodes. Sixty goats were evaluated using FAMACHA© score, faecal worm egg counts (EPG) and packed cell volum. Ten animals with potential to resistance and ten with potential to susceptibility to gastrointestinal nematode were selected by ascendent hierarchic groupment analysis. Goats from potential do susceptibility group presented the highest FAMACHA© score, EPG, Haemonchus L3 number and serum fibrinogem concentration, and the lowest packed cell volum, total serum protein and body score. The FAMACHA© score, 3 and 4, were the most predominant in potential do susceptibility animals with valid percentages of 45.5 and 30.5, respectively and degrees 2 and 3 in potential to resistance group, with respective valid percentages of 34.4 and 51.9. It was also observed that 58.4% of the potential do susceptibility animals and 90.6% of the potential to resistance are between FAMACHA© score 1 and 3, showing tendency of the potential to resistance to tolerate infection to gastro-intestinal nematode. The total number of immature and adult nematode obtained from potential to susceptibility goats was 2660.41 against 1669.34 in potential to resistance group. The association of these techniques is an important model to access nematodiosis in goats under semi-arid conditions.