<b>Avaliação de imunoensaio multianalito para dosagem de esteroides sexuais em ruminantes</b>

Abstract

RESUMO LOPES, P. R. Avaliação de imunoensaio multianalito para dosagem de esteroides sexuais em ruminantes. Evaluation of multi-analyte immunoassay technique to quantify sexual steroids in ruminants]. 2017. 83 f. Tese (Doutorado em Ciências)

Mortality caused by gastrointestinal nematodes in beef cattle submitted to an inadequate sanitary protocol

“…Gastrointestinal nematodes (NGIs) are often found in mixed parasitic infections of cattle and are associated with decreased weight gain, milk production, reproductive performance, carcass quality, immunity, and feed conversion, leading to economic losses (Borges et al 2012, Pfukenyi & Mukaratirwa 2013, Lopes et al 2017.…”

“…Haemonchus placei parasites infect the abomasum of cattle and cause damage to the host due to its hematophagous habit and to the physiological changes in the abomasum resulting from the mucosal lesions that arise out of this eating habit. Affected cattle present anemia, hypoproteinemia, excessive iron loss, submandibular edema, bristly hair, anorexia, and abomasal mucosal lesions (Lopes et al 2017). In the 1970s and 1980s, there were outbreaks of worm disease in cattle that could result in mortality of up to 10% of calves (Bianchin et al 1993).…”

“…Larval (L3 and L4) and adult forms of Trichostrongylus axei are found, respectively, inside mucosal glands and in the lumen of the abomasum (Lopes et al 2017). Infections are usually asymptomatic, but can result in diarrhea, dehydration, and hypoproteinemia if there are large numbers of these helminths (Uzal et al 2016).…”

Influence of silvopastoral systems on gastrointestinal nematode infection and immune response of Nellore heifers under tropical conditions

“…Flies, ticks and helminths are responsible for annual losses of more than 13 billion US dollars for livestock according to Grisi et al (2014). Among those parasites, gastrointestinal nematodes frequently cause severe injuries to farm animals through its parasitic stage; such infections usually are associated with decreased weight gain, milk production, and feed conversion (Lopes et al, 2017). Regarding helminthoses control, chemical-based procedures have been used for decades (Geurden et al, 2015) although there are available other approaches.…”