Diagnóstico e controle químico das helmintoses em bovinos: revisão de literatura

Abstract

A bovinocultura tem uma atividade crescente em todo o Brasil, no entanto, a produção desses ruminantes é prejudicada pelas helmintoses, por causarem retardo no desenvolvimento dos animais, levando à baixa produtividade e, consequentemente, elevadas perdas econômicas. O controle do parasitismo por nematóides gastrintestinais é realizado principalmente com o uso de anti-helmínticos. A utilização intensiva desses medicamentos, uso de subdoses, diagnósticos incorretos e a falta de rotatividade de bases farmacológicas têm provocado um sério problema sanitário: a resistência dos helmintos aos fármacos. O teste OPG é uma ferramenta útil, prática, rápida e que não requer o sacrifício dos animais, muito utilizado para diagnóstico da doença e prescrição do tratamento correto. O presente estudo visa apresentar o diagnóstico e controle químico das principais helmintoses bovinas perante a literatura, com o objetivo de contribuir para o melhor desenvolvimento dos bezerros, boa produtividade e ganho econômico satisfatório do produtor.

Recent Advances in the Control of Helminths of Domestic Animals by Helminthophagous Fungi

“…The internal parasites of ruminants is considered one of the main causes of important economic losses in cattle kept under pasture conditions, mainly in tropical and subtropical regions, due to the conditions of high temperature and humidity [41,42]. The absence of adequate anthelmintic control can lead to significant losses responsible for the decrease in food consumption, gastrointestinal disturbances, and compromised animal development, which can result in death in extreme cases [43,44]. In some regions, helminthiasis are the main cause of mortality in goats, sheep, cattle, and horses, especially young animals.…”

Epidemiological survey of gastrointestinal infections by gastrointestinal nematodes and coccidia in cattle in the semiarid region of Northeastern Brazil

“…2023 losses in herds. These parasites compromise the animals' health through causing clinical pictures of inappetence, anemia, diarrhea, growth retardation and death in extreme cases (Grisi et al, 2014;Pinilla Léon et al, 2019;Almeida et al, 2020).…”

“…Among nematode helminths, the most important and prevalent genera worldwide are those belonging to the superfamily Trichostrongyloidea, especially in tropical areas with a semiarid climate (Almeida et al, 2020). These helminths cause parasitic gastroenteritis in cattle (Micheloud et al, 2015;Henriques et al, 2021;Melo et al, 2021).…”

“…Recently, anthelmintic multidrug resistance was described in cattle herds in the semi-arid region of northeastern Brazil (Melo et al, 2021) and several species of Eimeria parasitizing these animals were later identified (Melo et al, 2022). In such situations, the animals develop clinical symptoms of greater severity, and high mortality rates may occur, thus raising the economic losses (Almeida et al, 2020;Melo et al, 2021). It is known that gastrointestinal nematode infections generate an annual economic impact of 7.11 billion dollars worldwide (Grisi et al, 2014).…”

Resistance of bovine gastrointestinal nematodes to four classes of anthelmintics in the semiarid region of Paraíba state, Brazil

“…Usually, cattle nematode infections are mixed, in which more than one species parasitizes the same animal (Fávero et al, 2020). The absence of adequate anthelmintic control can lead to significant losses, which gives rise to decreased food intake, gastrointestinal disorders and impaired animal development, leading to death in extreme cases (Cezar et al, 2008;Almeida et al, 2020).…”