Gastrointestinal nematodes (GINs) cause considerable economic losses in grazing goat herds. At present, GIN control cannot rely on conventional anthelmintic (AH) drugs because parasites have developed resistance against such drugs. Thus, alternative control methods are being sought to reduce the dependence on AH. Many tannin-rich plants exhibit AH activity and may be used as alternatives for GIN control. Mimosa caesalpiniifolia is a tannin-rich shrub consumed by small ruminants in Brazil. This study evaluated the in vivo AH effect of M. caesalpiniifolia leaf powder supplementation on GIN egg fecal excretion and worm burden in goats. Plant leaves were harvested, dried and ground to obtain a powder. Twenty-four castrated male goats, aged six to eight months, with a mean body weight of 15.0 ± 2.5 kg were used in the experiment. Animals were infected orally with 16,000 larvae comprising 50% Haemonchus spp., 41% Trichostrongylus spp. and 9% Oesophagostomum spp. Once the infection was patent, the goats were distributed into four groups of six animals. The control group received concentrate without condensed tannins (CTs) and did not receive any drench against GINs. The monepantel group received concentrate without CTs and were drenched once with monepantel. The other two groups received the M. caesalpiniifolia leaf powder in two periods of seven consecutive days (days 1-7 and 14-21), with one of the groups also receiving 10 g of polyethyleneglycol (PEG)/day. The animals were weighed weekly, and individual fecal eggs counts (FECs) were performed daily. After 28 days, the animals were humanly slaughtered, and the worm burden was estimated. Although live weight gain and FECs did not differ among the groups (P > 0.05), post-mortem worm counts showed a reduction in Haemonchus contortus adult worm burden (57.7%) in goats of the CT group compared to control goats (P < 0.05). The addition of PEG did not diminish AH activity in the CT + PEG group (66.9% reduction compared to the control). No AH effect against other GIN species was found. The result for the addition of PEG suggested that the observed AH activity was associated with plant secondary compounds, as opposed to CTs. As expected, no AH effect against Oesophagostomum columbianum was found for the monepantel group showed. Thus, feeding dry leaves of M. caesalpiniifolia represent a promising alternative for the control of GIN infections in goats.
A caprinocultura é uma atividade econômica de subsistência muito importante para a região Nordeste do Brasil. O objetivo deste estudo foi levantar dados relativos ao perfil econômico dos criadores de caprinos e de suas respectivas unidades de produção nos assentamentos rurais dos municípios de Cachoeira Grande e Morros, no estado do Maranhão. As atividades metodológicas pertinentes a este trabalho foram marcadas pela aplicação de um questionário para obtenção de informações gerais, desde as características sociais dos criadores, bem como para caracterização das construções e instalações das propriedades, levantamento dos aspectos sanitários como: infestações e infecções por parasitas. Os resultados mostram que todos os criadores de caprinos têm o ensino fundamental incompleto. A criação em sua minoria é de subsistência, possuindo apriscos rústicos e sem estrutura adequada para manejo dos animais. Observou-se, nos animais amostrados, infestações por ectoparasitas dos gêneros Bovicolacaprae, Thricodectis e Amblyomma, associados à presença de parasitas gastrintestinais dos gêneros Haemonchus e Trichostrongylus. Conclui-se que um manejo produtivo adequado nas criações caprinas proporciona a maximização dos lucros na atividade, por permitir a obtenção de produtos e derivados de qualidade, o que implica na importância da verificação das práticas utilizadas nas propriedades que exercem essa atividade nos municípios. A caprinocultura local deve ser fomentada através de políticas públicas, levando-se em consideração o potencial produtivo relacionado ao sistema de criação “super-extensivo”, as estruturas físicas das propriedades, as dificuldades relatadas e as características locais.
Perfil bioquímico de ovinos alimentados com níveis de inclusão do resíduo úmido de cervejaria Profile biochemical sheep fed levels of inclusion of wet brewery residue
/agrariacad Comportamento ingestivo de ovinos alimentados com diferentes níveis de resíduo úmido de cervejaria. Ingestive behavior of sheep fed with different levels of wet brew residue
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.